diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 9b68e49..1133a33 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -8,11 +8,7 @@ stages:
 .script: &compile
   stage: test
   script:
-    - mkdir build
-    - cd build
-    - scan-build cmake ..
-    - scan-build --status-bugs make -j$(nproc)
-    - rm -r *
+    - mkdir build && cd build
     - cmake -DBUILD_TESTING=1 ..
     - make -j$(nproc)
     - broadwayd & CTEST_OUTPUT_ON_FAILURE=1 make test
@@ -26,6 +22,20 @@ fedora:
 arch:
   image: cppit/jucipp:arch
   <<: *compile
+static-analysis:
+  image: cppit/jucipp:arch
+  stage: test
+  script:
+    - mkdir build && cd build
+    - scan-build cmake ..
+    - scan-build --status-bugs make -j$(nproc)
+thread-safety-analysis:
+  image: cppit/jucipp:arch
+  stage: test
+  script:
+  - mkdir build && cd build
+  - CXX=clang++ CXXFLAGS=-Werror cmake ..
+  - make -j$(nproc)
 debian-testing:
   image: cppit/jucipp:debian-testing
   <<: *compile
diff --git a/CMakeLists.txt b/CMakeLists.txt
index e5ae23a..96a945c 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -27,6 +27,7 @@ if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
   add_compile_options(-Wno-cpp)
 elseif(CMAKE_CXX_COMPILER_ID MATCHES "Clang")
   add_compile_options("-Wno-#warnings")
+  add_compile_options(-Wthread-safety)
 endif()
 
 if(APPLE)
diff --git a/src/autocomplete.cc b/src/autocomplete.cc
index 892b6e7..ce834f7 100644
--- a/src/autocomplete.cc
+++ b/src/autocomplete.cc
@@ -94,7 +94,12 @@ void Autocomplete::run() {
           }
           else {
             auto start_iter = view->get_buffer()->get_insert()->get_iter();
-            if(prefix.size() > 0 && !start_iter.backward_chars(prefix.size())) {
+            std::size_t prefix_size;
+            {
+              LockGuard lock(prefix_mutex);
+              prefix_size = prefix.size();
+            }
+            if(prefix_size > 0 && !start_iter.backward_chars(prefix_size)) {
               state = State::IDLE;
               reparse();
               return;
diff --git a/src/autocomplete.h b/src/autocomplete.h
index a1d54cd..f96fdb7 100644
--- a/src/autocomplete.h
+++ b/src/autocomplete.h
@@ -1,5 +1,6 @@
 #pragma once
 #include "dispatcher.h"
+#include "mutex.h"
 #include "tooltips.h"
 #include <atomic>
 #include <thread>
@@ -16,8 +17,8 @@ class Autocomplete {
 public:
   enum class State { IDLE, STARTING, RESTARTING, CANCELED };
 
-  Glib::ustring prefix;
-  std::mutex prefix_mutex;
+  Mutex prefix_mutex;
+  Glib::ustring prefix GUARDED_BY(prefix_mutex);
   std::vector<std::string> rows;
   Tooltips tooltips;
 
@@ -28,7 +29,7 @@ public:
   std::function<bool()> is_processing = [] { return true; };
   std::function<void()> reparse = [] {};
   std::function<void()> cancel_reparse = [] {};
-  std::function<std::unique_ptr<std::lock_guard<std::mutex>>()> get_parse_lock = [] { return nullptr; };
+  std::function<std::unique_ptr<LockGuard>()> get_parse_lock = [] { return nullptr; };
   std::function<void()> stop_parse = [] {};
 
   std::function<bool(guint last_keyval)> is_continue_key = [](guint) { return false; };
diff --git a/src/debug_lldb.cc b/src/debug_lldb.cc
index 5d6ead0..925fe48 100644
--- a/src/debug_lldb.cc
+++ b/src/debug_lldb.cc
@@ -86,6 +86,8 @@ std::tuple<std::vector<std::string>, std::string, std::vector<std::string>> Debu
 void Debug::LLDB::start(const std::string &command, const boost::filesystem::path &path,
                         const std::vector<std::pair<boost::filesystem::path, int>> &breakpoints,
                         const std::vector<std::string> &startup_commands, const std::string &remote_host) {
+  LockGuard lock(mutex);
+
   if(!debugger) {
     lldb::SBDebugger::Initialize();
     debugger = std::make_unique<lldb::SBDebugger>(lldb::SBDebugger::Create(true, log, nullptr));
@@ -174,12 +176,14 @@ void Debug::LLDB::start(const std::string &command, const boost::filesystem::pat
 
     process = std::make_unique<lldb::SBProcess>(target.Launch(*listener, argv.data(), environment.data(), nullptr, nullptr, nullptr, path.string().c_str(), lldb::eLaunchFlagNone, false, error));
   }
+
   if(error.Fail()) {
     Terminal::get().async_print(std::string("Error (debug): ") + error.GetCString() + '\n', true);
     for(auto &handler : on_exit)
       handler(-1);
     return;
   }
+
   if(debug_thread.joinable())
     debug_thread.join();
   for(auto &handler : on_start)
@@ -193,7 +197,7 @@ void Debug::LLDB::start(const std::string &command, const boost::filesystem::pat
   debug_thread = std::thread([this]() {
     lldb::SBEvent event;
     while(true) {
-      std::unique_lock<std::mutex> lock(mutex);
+      LockGuard lock(mutex);
       if(listener->GetNextEvent(event)) {
         if((event.GetType() & lldb::SBProcess::eBroadcastBitStateChanged) > 0) {
           auto state = process->GetStateFromEvent(event);
@@ -246,13 +250,13 @@ void Debug::LLDB::start(const std::string &command, const boost::filesystem::pat
 }
 
 void Debug::LLDB::continue_debug() {
-  std::lock_guard<std::mutex> lock(mutex);
+  LockGuard lock(mutex);
   if(state == lldb::StateType::eStateStopped)
     process->Continue();
 }
 
 void Debug::LLDB::stop() {
-  std::lock_guard<std::mutex> lock(mutex);
+  LockGuard lock(mutex);
   if(state == lldb::StateType::eStateRunning) {
     auto error = process->Stop();
     if(error.Fail())
@@ -261,7 +265,7 @@ void Debug::LLDB::stop() {
 }
 
 void Debug::LLDB::kill() {
-  std::lock_guard<std::mutex> lock(mutex);
+  LockGuard lock(mutex);
   if(process) {
     auto error = process->Kill();
     if(error.Fail())
@@ -270,29 +274,29 @@ void Debug::LLDB::kill() {
 }
 
 void Debug::LLDB::step_over() {
-  std::lock_guard<std::mutex> lock(mutex);
+  LockGuard lock(mutex);
   if(state == lldb::StateType::eStateStopped) {
     process->GetSelectedThread().StepOver();
   }
 }
 
 void Debug::LLDB::step_into() {
-  std::lock_guard<std::mutex> lock(mutex);
+  LockGuard lock(mutex);
   if(state == lldb::StateType::eStateStopped) {
     process->GetSelectedThread().StepInto();
   }
 }
 
 void Debug::LLDB::step_out() {
-  std::lock_guard<std::mutex> lock(mutex);
+  LockGuard lock(mutex);
   if(state == lldb::StateType::eStateStopped) {
     process->GetSelectedThread().StepOut();
   }
 }
 
 std::pair<std::string, std::string> Debug::LLDB::run_command(const std::string &command) {
+  LockGuard lock(mutex);
   std::pair<std::string, std::string> command_return;
-  std::lock_guard<std::mutex> lock(mutex);
   if(state == lldb::StateType::eStateStopped || state == lldb::StateType::eStateRunning) {
     lldb::SBCommandReturnObject command_return_object;
     debugger->GetCommandInterpreter().HandleCommand(command.c_str(), command_return_object, true);
@@ -307,8 +311,8 @@ std::pair<std::string, std::string> Debug::LLDB::run_command(const std::string &
 }
 
 std::vector<Debug::LLDB::Frame> Debug::LLDB::get_backtrace() {
+  LockGuard lock(mutex);
   std::vector<Frame> backtrace;
-  std::lock_guard<std::mutex> lock(mutex);
   if(state == lldb::StateType::eStateStopped) {
     auto thread = process->GetSelectedThread();
     for(uint32_t c_f = 0; c_f < thread.GetNumFrames(); c_f++) {
@@ -343,8 +347,8 @@ std::vector<Debug::LLDB::Frame> Debug::LLDB::get_backtrace() {
 }
 
 std::vector<Debug::LLDB::Variable> Debug::LLDB::get_variables() {
+  LockGuard lock(mutex);
   std::vector<Debug::LLDB::Variable> variables;
-  std::lock_guard<std::mutex> lock(mutex);
   if(state == lldb::StateType::eStateStopped) {
     for(uint32_t c_t = 0; c_t < process->GetNumThreads(); c_t++) {
       auto thread = process->GetThreadAtIndex(c_t);
@@ -398,7 +402,7 @@ std::vector<Debug::LLDB::Variable> Debug::LLDB::get_variables() {
 }
 
 void Debug::LLDB::select_frame(uint32_t frame_index, uint32_t thread_index_id) {
-  std::lock_guard<std::mutex> lock(mutex);
+  LockGuard lock(mutex);
   if(state == lldb::StateType::eStateStopped) {
     if(thread_index_id != 0)
       process->SetSelectedThreadByIndexID(thread_index_id);
@@ -414,7 +418,7 @@ void Debug::LLDB::cancel() {
 }
 
 std::string Debug::LLDB::get_value(const std::string &variable, const boost::filesystem::path &file_path, unsigned int line_nr, unsigned int line_index) {
-  std::lock_guard<std::mutex> lock(mutex);
+  LockGuard lock(mutex);
   if(state == lldb::StateType::eStateStopped) {
     auto frame = process->GetSelectedThread().GetSelectedFrame();
 
@@ -449,8 +453,8 @@ std::string Debug::LLDB::get_value(const std::string &variable, const boost::fil
 }
 
 std::string Debug::LLDB::get_value(const std::string &expression) {
+  LockGuard lock(mutex);
   std::string variable_value;
-  std::lock_guard<std::mutex> lock(mutex);
   if(state == lldb::StateType::eStateStopped) {
     auto frame = process->GetSelectedThread().GetSelectedFrame();
     if(variable_value.empty()) {
@@ -476,8 +480,8 @@ std::string Debug::LLDB::get_value(const std::string &expression) {
 }
 
 std::string Debug::LLDB::get_return_value(const boost::filesystem::path &file_path, unsigned int line_nr, unsigned int line_index) {
+  LockGuard lock(mutex);
   std::string return_value;
-  std::lock_guard<std::mutex> lock(mutex);
   if(state == lldb::StateType::eStateStopped) {
     auto thread = process->GetSelectedThread();
     auto thread_return_value = thread.GetStopReturnValue();
@@ -499,22 +503,22 @@ std::string Debug::LLDB::get_return_value(const boost::filesystem::path &file_pa
 }
 
 bool Debug::LLDB::is_invalid() {
-  std::lock_guard<std::mutex> lock(mutex);
+  LockGuard lock(mutex);
   return state == lldb::StateType::eStateInvalid;
 }
 
 bool Debug::LLDB::is_stopped() {
-  std::lock_guard<std::mutex> lock(mutex);
+  LockGuard lock(mutex);
   return state == lldb::StateType::eStateStopped;
 }
 
 bool Debug::LLDB::is_running() {
-  std::lock_guard<std::mutex> lock(mutex);
+  LockGuard lock(mutex);
   return state == lldb::StateType::eStateRunning;
 }
 
 void Debug::LLDB::add_breakpoint(const boost::filesystem::path &file_path, int line_nr) {
-  std::lock_guard<std::mutex> lock(mutex);
+  LockGuard lock(mutex);
   if(state == lldb::eStateStopped || state == lldb::eStateRunning) {
     if(!(process->GetTarget().BreakpointCreateByLocation(file_path.string().c_str(), line_nr)).IsValid())
       Terminal::get().async_print("Error (debug): Could not create breakpoint at: " + file_path.string() + ":" + std::to_string(line_nr) + '\n', true);
@@ -522,7 +526,7 @@ void Debug::LLDB::add_breakpoint(const boost::filesystem::path &file_path, int l
 }
 
 void Debug::LLDB::remove_breakpoint(const boost::filesystem::path &file_path, int line_nr, int line_count) {
-  std::lock_guard<std::mutex> lock(mutex);
+  LockGuard lock(mutex);
   if(state == lldb::eStateStopped || state == lldb::eStateRunning) {
     auto target = process->GetTarget();
     for(int line_nr_try = line_nr; line_nr_try < line_count; line_nr_try++) {
@@ -547,7 +551,7 @@ void Debug::LLDB::remove_breakpoint(const boost::filesystem::path &file_path, in
 }
 
 void Debug::LLDB::write(const std::string &buffer) {
-  std::lock_guard<std::mutex> lock(mutex);
+  LockGuard lock(mutex);
   if(state == lldb::StateType::eStateRunning) {
     process->PutSTDIN(buffer.c_str(), buffer.size());
   }
diff --git a/src/debug_lldb.h b/src/debug_lldb.h
index 32947d8..43fa856 100644
--- a/src/debug_lldb.h
+++ b/src/debug_lldb.h
@@ -1,8 +1,8 @@
 #pragma once
+#include "mutex.h"
 #include <boost/filesystem.hpp>
 #include <list>
 #include <lldb/API/LLDB.h>
-#include <mutex>
 #include <thread>
 #include <tuple>
 
@@ -45,7 +45,7 @@ namespace Debug {
     /// The handlers are not run in the main loop.
     std::list<std::function<void(const lldb::SBEvent &)>> on_event;
 
-    std::mutex mutex;
+    Mutex mutex;
 
     void start(const std::string &command, const boost::filesystem::path &path = "",
                const std::vector<std::pair<boost::filesystem::path, int>> &breakpoints = {},
@@ -81,12 +81,12 @@ namespace Debug {
   private:
     std::tuple<std::vector<std::string>, std::string, std::vector<std::string>> parse_run_arguments(const std::string &command);
 
-    std::unique_ptr<lldb::SBDebugger> debugger;
-    std::unique_ptr<lldb::SBListener> listener;
-    std::unique_ptr<lldb::SBProcess> process;
+    std::unique_ptr<lldb::SBDebugger> debugger GUARDED_BY(mutex);
+    std::unique_ptr<lldb::SBListener> listener GUARDED_BY(mutex);
+    std::unique_ptr<lldb::SBProcess> process GUARDED_BY(mutex);
     std::thread debug_thread;
 
-    lldb::StateType state;
+    lldb::StateType state GUARDED_BY(mutex);
 
     size_t buffer_size;
   };
diff --git a/src/directories.h b/src/directories.h
index fb3fb48..691ad55 100644
--- a/src/directories.h
+++ b/src/directories.h
@@ -4,7 +4,6 @@
 #include "git.h"
 #include <atomic>
 #include <gtkmm.h>
-#include <mutex>
 #include <string>
 #include <thread>
 #include <unordered_map>
diff --git a/src/dispatcher.cc b/src/dispatcher.cc
index 8382e43..c122576 100644
--- a/src/dispatcher.cc
+++ b/src/dispatcher.cc
@@ -9,7 +9,7 @@ void Dispatcher::connect() {
   connection = dispatcher.connect([this] {
     std::vector<std::list<std::function<void()>>::iterator> its;
     {
-      std::lock_guard<std::mutex> lock(functions_mutex);
+      LockGuard lock(functions_mutex);
       if(functions.empty())
         return;
       its.reserve(functions.size());
@@ -19,7 +19,7 @@ void Dispatcher::connect() {
     for(auto &it : its)
       (*it)();
     {
-      std::lock_guard<std::mutex> lock(functions_mutex);
+      LockGuard lock(functions_mutex);
       for(auto &it : its)
         functions.erase(it);
     }
@@ -35,7 +35,7 @@ void Dispatcher::disconnect() {
 }
 
 void Dispatcher::reset() {
-  std::lock_guard<std::mutex> lock(functions_mutex);
+  LockGuard lock(functions_mutex);
   disconnect();
   functions.clear();
   connect();
diff --git a/src/dispatcher.h b/src/dispatcher.h
index 2a2d3e7..4765972 100644
--- a/src/dispatcher.h
+++ b/src/dispatcher.h
@@ -1,13 +1,13 @@
 #pragma once
+#include "mutex.h"
 #include <functional>
 #include <gtkmm.h>
 #include <list>
-#include <mutex>
 
 class Dispatcher {
 private:
-  std::list<std::function<void()>> functions;
-  std::mutex functions_mutex;
+  Mutex functions_mutex;
+  std::list<std::function<void()>> functions GUARDED_BY(functions_mutex);
   Glib::Dispatcher dispatcher;
   sigc::connection connection;
 
@@ -22,7 +22,7 @@ public:
   /// Can be called from any thread.
   template <typename T>
   void post(T &&function) {
-    std::lock_guard<std::mutex> lock(functions_mutex);
+    LockGuard lock(functions_mutex);
     functions.emplace_back(std::forward<T>(function));
     dispatcher();
   }
diff --git a/src/git.cc b/src/git.cc
index 5a157f7..5f8bb6f 100644
--- a/src/git.cc
+++ b/src/git.cc
@@ -3,7 +3,8 @@
 #include <unordered_map>
 
 bool Git::initialized = false;
-std::mutex Git::mutex;
+Mutex Git::mutex;
+Git::Error Git::error;
 
 std::string Git::Error::message() noexcept {
 #if LIBGIT2_VER_MAJOR > 0 || (LIBGIT2_VER_MAJOR == 0 && LIBGIT2_VER_MINOR >= 28)
@@ -22,9 +23,8 @@ Git::Repository::Diff::Diff(const boost::filesystem::path &path, git_repository
     if(blob)
       git_blob_free(blob);
   });
-  Error error;
-  std::lock_guard<std::mutex> lock(mutex);
   auto spec = "HEAD:" + path.generic_string();
+  LockGuard lock(mutex);
   error.code = git_revparse_single(reinterpret_cast<git_object **>(&blob), repository, spec.c_str());
   if(error)
     throw std::runtime_error(error.message());
@@ -33,39 +33,35 @@ Git::Repository::Diff::Diff(const boost::filesystem::path &path, git_repository
   options.context_lines = 0;
 }
 
-//Based on https://github.com/atom/git-diff/blob/master/lib/git-diff-view.coffee
-int Git::Repository::Diff::hunk_cb(const git_diff_delta *delta, const git_diff_hunk *hunk, void *payload) noexcept {
-  auto lines = static_cast<Lines *>(payload);
-  auto start = hunk->new_start - 1;
-  auto end = hunk->new_start + hunk->new_lines - 1;
-  if(hunk->old_lines == 0 && hunk->new_lines > 0)
-    lines->added.emplace_back(start, end);
-  else if(hunk->new_lines == 0 && hunk->old_lines > 0)
-    lines->removed.emplace_back(start);
-  else
-    lines->modified.emplace_back(start, end);
-
-  return 0;
-}
-
 Git::Repository::Diff::Lines Git::Repository::Diff::get_lines(const std::string &buffer) {
   Lines lines;
-  Error error;
-  std::lock_guard<std::mutex> lock(mutex);
-  error.code = git_diff_blob_to_buffer(blob.get(), nullptr, buffer.c_str(), buffer.size(), nullptr, &options, nullptr, nullptr, hunk_cb, nullptr, &lines);
+  LockGuard lock(mutex);
+  error.code = git_diff_blob_to_buffer(blob.get(), nullptr, buffer.c_str(), buffer.size(), nullptr, &options, nullptr, nullptr, [](const git_diff_delta *delta, const git_diff_hunk *hunk, void *payload) {
+    //Based on https://github.com/atom/git-diff/blob/master/lib/git-diff-view.coffee
+    auto lines = static_cast<Lines *>(payload);
+    auto start = hunk->new_start - 1;
+    auto end = hunk->new_start + hunk->new_lines - 1;
+    if(hunk->old_lines == 0 && hunk->new_lines > 0)
+      lines->added.emplace_back(start, end);
+    else if(hunk->new_lines == 0 && hunk->old_lines > 0)
+      lines->removed.emplace_back(start);
+    else
+      lines->modified.emplace_back(start, end);
+
+    return 0;
+  }, nullptr, &lines);
   if(error)
     throw std::runtime_error(error.message());
   return lines;
 }
 
 std::vector<Git::Repository::Diff::Hunk> Git::Repository::Diff::get_hunks(const std::string &old_buffer, const std::string &new_buffer) {
-  initialize();
   std::vector<Git::Repository::Diff::Hunk> hunks;
-  Error error;
+  LockGuard lock(mutex);
+  initialize();
   git_diff_options options;
   git_diff_init_options(&options, GIT_DIFF_OPTIONS_VERSION);
   options.context_lines = 0;
-  std::lock_guard<std::mutex> lock(mutex);
   error.code = git_diff_buffers(old_buffer.c_str(), old_buffer.size(), nullptr, new_buffer.c_str(), new_buffer.size(), nullptr, &options, nullptr, nullptr, [](const git_diff_delta *delta, const git_diff_hunk *hunk, void *payload) {
     auto hunks = static_cast<std::vector<Git::Repository::Diff::Hunk> *>(payload);
     hunks->emplace_back(hunk->old_start, hunk->old_lines, hunk->new_start, hunk->new_lines);
@@ -76,25 +72,22 @@ std::vector<Git::Repository::Diff::Hunk> Git::Repository::Diff::get_hunks(const
   return hunks;
 }
 
-int Git::Repository::Diff::line_cb(const git_diff_delta *delta, const git_diff_hunk *hunk, const git_diff_line *line, void *payload) noexcept {
-  auto details = static_cast<std::pair<std::string, int> *>(payload);
-  auto line_nr = details->second;
-  auto start = hunk->new_start - 1;
-  auto end = hunk->new_start + hunk->new_lines - 1;
-  if(line_nr == start || (line_nr >= start && line_nr < end)) {
-    if(details->first.empty())
-      details->first += std::string(hunk->header, hunk->header_len);
-    details->first += line->origin + std::string(line->content, line->content_len);
-  }
-  return 0;
-}
-
 std::string Git::Repository::Diff::get_details(const std::string &buffer, int line_nr) {
   std::pair<std::string, int> details;
   details.second = line_nr;
-  Error error;
-  std::lock_guard<std::mutex> lock(mutex);
-  error.code = git_diff_blob_to_buffer(blob.get(), nullptr, buffer.c_str(), buffer.size(), nullptr, &options, nullptr, nullptr, nullptr, line_cb, &details);
+  LockGuard lock(mutex);
+  error.code = git_diff_blob_to_buffer(blob.get(), nullptr, buffer.c_str(), buffer.size(), nullptr, &options, nullptr, nullptr, nullptr, [](const git_diff_delta *delta, const git_diff_hunk *hunk, const git_diff_line *line, void *payload) {
+    auto details = static_cast<std::pair<std::string, int> *>(payload);
+    auto line_nr = details->second;
+    auto start = hunk->new_start - 1;
+    auto end = hunk->new_start + hunk->new_lines - 1;
+    if(line_nr == start || (line_nr >= start && line_nr < end)) {
+      if(details->first.empty())
+        details->first += std::string(hunk->header, hunk->header_len);
+      details->first += line->origin + std::string(line->content, line->content_len);
+    }
+    return 0;
+  }, &details);
   if(error)
     throw std::runtime_error(error.message());
   return details.first;
@@ -103,8 +96,7 @@ std::string Git::Repository::Diff::get_details(const std::string &buffer, int li
 Git::Repository::Repository(const boost::filesystem::path &path) {
   git_repository *repository_ptr;
   {
-    Error error;
-    std::lock_guard<std::mutex> lock(mutex);
+    LockGuard lock(mutex);
     error.code = git_repository_open_ext(&repository_ptr, path.generic_string().c_str(), 0, nullptr);
     if(error)
       throw std::runtime_error(error.message());
@@ -132,123 +124,88 @@ Git::Repository::~Repository() {
   monitor_changed_connection.disconnect();
 }
 
-std::string Git::Repository::status_string(STATUS status) noexcept {
-  switch(status) {
-  case STATUS::CURRENT:
-    return "current";
-  case STATUS::NEW:
-    return "new";
-  case STATUS::MODIFIED:
-    return "modified";
-  case STATUS::DELETED:
-    return "deleted";
-  case STATUS::RENAMED:
-    return "renamed";
-  case STATUS::TYPECHANGE:
-    return "typechange";
-  case STATUS::UNREADABLE:
-    return "unreadable";
-  case STATUS::IGNORED:
-    return "ignored";
-  case STATUS::CONFLICTED:
-    return "conflicted";
-  default:
-    return "";
+Git::Repository::Status Git::Repository::get_status() {
+  {
+    LockGuard lock(saved_status_mutex);
+    if(has_saved_status)
+      return saved_status;
   }
-}
 
-int Git::Repository::status_callback(const char *path, unsigned int status_flags, void *data) noexcept {
-  auto callback = static_cast<std::function<void(const char *path, STATUS status)> *>(data);
+  struct Data {
+    const boost::filesystem::path &work_path;
+    Status status = {};
+  };
+  Data data{work_path};
+  {
+    LockGuard lock(mutex);
+    error.code = git_status_foreach(repository.get(), [](const char *path, unsigned int status_flags, void *payload) {
+      auto data = static_cast<Data *>(payload);
 
-  STATUS status;
-  if((status_flags & (GIT_STATUS_INDEX_NEW | GIT_STATUS_WT_NEW)) > 0)
-    status = STATUS::NEW;
-  else if((status_flags & (GIT_STATUS_INDEX_MODIFIED | GIT_STATUS_WT_MODIFIED)) > 0)
-    status = STATUS::MODIFIED;
-  else if((status_flags & (GIT_STATUS_INDEX_DELETED | GIT_STATUS_WT_DELETED)) > 0)
-    status = STATUS::DELETED;
-  else if((status_flags & (GIT_STATUS_INDEX_RENAMED | GIT_STATUS_WT_RENAMED)) > 0)
-    status = STATUS::RENAMED;
-  else if((status_flags & (GIT_STATUS_INDEX_TYPECHANGE | GIT_STATUS_WT_TYPECHANGE)) > 0)
-    status = STATUS::TYPECHANGE;
-  else if((status_flags & (GIT_STATUS_WT_UNREADABLE)) > 0)
-    status = STATUS::UNREADABLE;
-  else if((status_flags & (GIT_STATUS_IGNORED)) > 0)
-    status = STATUS::IGNORED;
-  else if((status_flags & (GIT_STATUS_CONFLICTED)) > 0)
-    status = STATUS::CONFLICTED;
-  else
-    status = STATUS::CURRENT;
+      STATUS status;
+      if((status_flags & (GIT_STATUS_INDEX_NEW | GIT_STATUS_WT_NEW)) > 0)
+        status = STATUS::NEW;
+      else if((status_flags & (GIT_STATUS_INDEX_MODIFIED | GIT_STATUS_WT_MODIFIED)) > 0)
+        status = STATUS::MODIFIED;
+      else if((status_flags & (GIT_STATUS_INDEX_DELETED | GIT_STATUS_WT_DELETED)) > 0)
+        status = STATUS::DELETED;
+      else if((status_flags & (GIT_STATUS_INDEX_RENAMED | GIT_STATUS_WT_RENAMED)) > 0)
+        status = STATUS::RENAMED;
+      else if((status_flags & (GIT_STATUS_INDEX_TYPECHANGE | GIT_STATUS_WT_TYPECHANGE)) > 0)
+        status = STATUS::TYPECHANGE;
+      else if((status_flags & (GIT_STATUS_WT_UNREADABLE)) > 0)
+        status = STATUS::UNREADABLE;
+      else if((status_flags & (GIT_STATUS_IGNORED)) > 0)
+        status = STATUS::IGNORED;
+      else if((status_flags & (GIT_STATUS_CONFLICTED)) > 0)
+        status = STATUS::CONFLICTED;
+      else
+        status = STATUS::CURRENT;
 
-  if(*callback)
-    (*callback)(path, status);
+      boost::filesystem::path rel_path(path);
+      do {
+        if(status == STATUS::MODIFIED)
+          data->status.modified.emplace((data->work_path / rel_path).generic_string());
+        if(status == STATUS::NEW)
+          data->status.added.emplace((data->work_path / rel_path).generic_string());
+        rel_path = rel_path.parent_path();
+      } while(!rel_path.empty());
 
-  return 0;
-}
+      return 0;
+    }, &data);
 
-Git::Repository::Status Git::Repository::get_status() {
-  {
-    std::lock_guard<std::mutex> lock(saved_status_mutex);
-    if(has_saved_status)
-      return saved_status;
+    if(error)
+      throw std::runtime_error(error.message());
   }
 
-  Status status;
-  bool first = true;
-  std::unique_lock<std::mutex> status_saved_lock(saved_status_mutex, std::defer_lock);
-  std::function<void(const char *path, STATUS status)> callback = [this, &status, &first, &status_saved_lock](const char *path_cstr, STATUS status_enum) {
-    if(first) {
-      status_saved_lock.lock();
-      first = false;
-    }
-    boost::filesystem::path rel_path(path_cstr);
-    do {
-      if(status_enum == STATUS::MODIFIED)
-        status.modified.emplace((work_path / rel_path).generic_string());
-      if(status_enum == STATUS::NEW)
-        status.added.emplace((work_path / rel_path).generic_string());
-      rel_path = rel_path.parent_path();
-    } while(!rel_path.empty());
-  };
-  Error error;
-  std::lock_guard<std::mutex> lock(mutex);
-  error.code = git_status_foreach(repository.get(), status_callback, &callback);
-  if(error)
-    throw std::runtime_error(error.message());
-  saved_status = status;
+  LockGuard lock(saved_status_mutex);
+  saved_status = std::move(data.status);
   has_saved_status = true;
-  if(status_saved_lock)
-    status_saved_lock.unlock();
-  return status;
+  return saved_status;
 }
 
 void Git::Repository::clear_saved_status() {
-  std::lock_guard<std::mutex> lock(saved_status_mutex);
-  saved_status.added.clear();
-  saved_status.modified.clear();
+  LockGuard lock(saved_status_mutex);
+  saved_status = {};
   has_saved_status = false;
 }
 
 boost::filesystem::path Git::Repository::get_work_path() noexcept {
-  std::lock_guard<std::mutex> lock(mutex);
+  LockGuard lock(mutex);
   return Git::path(git_repository_workdir(repository.get()));
 }
 
 boost::filesystem::path Git::Repository::get_path() noexcept {
-  std::lock_guard<std::mutex> lock(mutex);
+  LockGuard lock(mutex);
   return Git::path(git_repository_path(repository.get()));
 }
 
 boost::filesystem::path Git::Repository::get_root_path(const boost::filesystem::path &path) {
-  initialize();
   git_buf root = {nullptr, 0, 0};
-  {
-    Error error;
-    std::lock_guard<std::mutex> lock(mutex);
-    error.code = git_repository_discover(&root, path.generic_string().c_str(), 0, nullptr);
-    if(error)
-      throw std::runtime_error(error.message());
-  }
+  LockGuard lock(mutex);
+  initialize();
+  error.code = git_repository_discover(&root, path.generic_string().c_str(), 0, nullptr);
+  if(error)
+    throw std::runtime_error(error.message());
   auto root_path = Git::path(root.ptr, root.size);
 #if LIBGIT2_VER_MAJOR > 0 || (LIBGIT2_VER_MAJOR == 0 && LIBGIT2_VER_MINOR >= 28)
   git_buf_dispose(&root);
@@ -265,7 +222,9 @@ Git::Repository::Diff Git::Repository::get_diff(const boost::filesystem::path &p
 std::string Git::Repository::get_branch() noexcept {
   std::string branch;
   git_reference *reference;
-  if(git_repository_head(&reference, repository.get()) == 0) {
+  LockGuard lock(mutex);
+  error.code = git_repository_head(&reference, repository.get());
+  if(!error) {
     if(auto reference_name_cstr = git_reference_name(reference)) {
       std::string reference_name(reference_name_cstr);
       size_t pos;
@@ -284,7 +243,6 @@ std::string Git::Repository::get_branch() noexcept {
 }
 
 void Git::initialize() noexcept {
-  std::lock_guard<std::mutex> lock(mutex);
   if(!initialized) {
     git_libgit2_init();
     initialized = true;
@@ -292,12 +250,12 @@ void Git::initialize() noexcept {
 }
 
 std::shared_ptr<Git::Repository> Git::get_repository(const boost::filesystem::path &path) {
-  initialize();
-  static std::unordered_map<std::string, std::weak_ptr<Git::Repository>> cache;
-  static std::mutex mutex;
-
-  std::lock_guard<std::mutex> lock(mutex);
   auto root_path = Repository::get_root_path(path).generic_string();
+
+  static Mutex mutex;
+  static std::unordered_map<std::string, std::weak_ptr<Git::Repository>> cache GUARDED_BY(mutex);
+
+  LockGuard lock(mutex);
   auto it = cache.find(root_path);
   if(it == cache.end())
     it = cache.emplace(root_path, std::weak_ptr<Git::Repository>()).first;
diff --git a/src/git.h b/src/git.h
index 3945c7b..1392645 100644
--- a/src/git.h
+++ b/src/git.h
@@ -1,10 +1,10 @@
 #pragma once
+#include "mutex.h"
 #include <boost/filesystem.hpp>
 #include <giomm.h>
 #include <git2.h>
 #include <iostream>
 #include <memory>
-#include <mutex>
 #include <unordered_set>
 #include <vector>
 
@@ -18,7 +18,7 @@ public:
 
   public:
     int code = 0;
-    operator bool() noexcept { return code < 0; }
+    operator bool() noexcept { return code != 0; }
   };
 
   class Repository {
@@ -45,8 +45,6 @@ public:
       Diff(const boost::filesystem::path &path, git_repository *repository);
       std::shared_ptr<git_blob> blob = nullptr;
       git_diff_options options;
-      static int hunk_cb(const git_diff_delta *delta, const git_diff_hunk *hunk, void *payload) noexcept;
-      static int line_cb(const git_diff_delta *delta, const git_diff_hunk *hunk, const git_diff_line *line, void *payload) noexcept;
 
     public:
       Lines get_lines(const std::string &buffer);
@@ -65,21 +63,17 @@ public:
     friend class Git;
     Repository(const boost::filesystem::path &path);
 
-    static int status_callback(const char *path, unsigned int status_flags, void *data) noexcept;
-
     std::unique_ptr<git_repository, std::function<void(git_repository *)>> repository;
 
     boost::filesystem::path work_path;
     sigc::connection monitor_changed_connection;
-    Status saved_status;
-    bool has_saved_status = false;
-    std::mutex saved_status_mutex;
+    Mutex saved_status_mutex;
+    Status saved_status GUARDED_BY(saved_status_mutex);
+    bool has_saved_status GUARDED_BY(saved_status_mutex) = false;
 
   public:
     ~Repository();
 
-    static std::string status_string(STATUS status) noexcept;
-
     Status get_status();
     void clear_saved_status();
 
@@ -95,15 +89,17 @@ public:
   };
 
 private:
-  static bool initialized;
+  static bool initialized GUARDED_BY(mutex);
 
   ///Mutex for thread safe operations
-  static std::mutex mutex;
+  static Mutex mutex;
+
+  static Error error GUARDED_BY(mutex);
 
   ///Call initialize in public static methods
-  static void initialize() noexcept;
+  static void initialize() noexcept REQUIRES(mutex);
 
-  static boost::filesystem::path path(const char *cpath, size_t cpath_length = static_cast<size_t>(-1)) noexcept;
+  static boost::filesystem::path path(const char *cpath, size_t cpath_length = static_cast<size_t>(-1)) noexcept REQUIRES(mutex);
 
 public:
   static std::shared_ptr<Repository> get_repository(const boost::filesystem::path &path);
diff --git a/src/mutex.h b/src/mutex.h
new file mode 100644
index 0000000..2720e7e
--- /dev/null
+++ b/src/mutex.h
@@ -0,0 +1,112 @@
+// Based on https://clang.llvm.org/docs/ThreadSafetyAnalysis.html
+#pragma once
+
+#include <mutex>
+
+// Enable thread safety attributes only with clang. Exclude Apple Clang since it is too old.
+#if defined(__clang__) && !defined(SWIG) && !defined(__apple_build_version__)
+#define THREAD_ANNOTATION_ATTRIBUTE__(x) __attribute__((x))
+#else
+#define THREAD_ANNOTATION_ATTRIBUTE__(x) // no-op
+#endif
+
+#define CAPABILITY(x) \
+  THREAD_ANNOTATION_ATTRIBUTE__(capability(x))
+
+#define SCOPED_CAPABILITY \
+  THREAD_ANNOTATION_ATTRIBUTE__(scoped_lockable)
+
+#define GUARDED_BY(x) \
+  THREAD_ANNOTATION_ATTRIBUTE__(guarded_by(x))
+
+#define PT_GUARDED_BY(x) \
+  THREAD_ANNOTATION_ATTRIBUTE__(pt_guarded_by(x))
+
+#define ACQUIRED_BEFORE(...) \
+  THREAD_ANNOTATION_ATTRIBUTE__(acquired_before(__VA_ARGS__))
+
+#define ACQUIRED_AFTER(...) \
+  THREAD_ANNOTATION_ATTRIBUTE__(acquired_after(__VA_ARGS__))
+
+#define REQUIRES(...) \
+  THREAD_ANNOTATION_ATTRIBUTE__(requires_capability(__VA_ARGS__))
+
+#define REQUIRES_SHARED(...) \
+  THREAD_ANNOTATION_ATTRIBUTE__(requires_shared_capability(__VA_ARGS__))
+
+#define ACQUIRE(...) \
+  THREAD_ANNOTATION_ATTRIBUTE__(acquire_capability(__VA_ARGS__))
+
+#define ACQUIRE_SHARED(...) \
+  THREAD_ANNOTATION_ATTRIBUTE__(acquire_shared_capability(__VA_ARGS__))
+
+#define RELEASE(...) \
+  THREAD_ANNOTATION_ATTRIBUTE__(release_capability(__VA_ARGS__))
+
+#define RELEASE_SHARED(...) \
+  THREAD_ANNOTATION_ATTRIBUTE__(release_shared_capability(__VA_ARGS__))
+
+#define TRY_ACQUIRE(...) \
+  THREAD_ANNOTATION_ATTRIBUTE__(try_acquire_capability(__VA_ARGS__))
+
+#define TRY_ACQUIRE_SHARED(...) \
+  THREAD_ANNOTATION_ATTRIBUTE__(try_acquire_shared_capability(__VA_ARGS__))
+
+#define EXCLUDES(...) \
+  THREAD_ANNOTATION_ATTRIBUTE__(locks_excluded(__VA_ARGS__))
+
+#define ASSERT_CAPABILITY(x) \
+  THREAD_ANNOTATION_ATTRIBUTE__(assert_capability(x))
+
+#define ASSERT_SHARED_CAPABILITY(x) \
+  THREAD_ANNOTATION_ATTRIBUTE__(assert_shared_capability(x))
+
+#define RETURN_CAPABILITY(x) \
+  THREAD_ANNOTATION_ATTRIBUTE__(lock_returned(x))
+
+#define NO_THREAD_SAFETY_ANALYSIS \
+  THREAD_ANNOTATION_ATTRIBUTE__(no_thread_safety_analysis)
+
+/// Use this class instead of std::mutex
+class CAPABILITY("mutex") Mutex {
+  std::mutex mutex;
+
+public:
+  void lock() ACQUIRE() {
+    mutex.lock();
+  }
+
+  bool try_lock() TRY_ACQUIRE(true) {
+    return mutex.try_lock();
+  }
+
+  void unlock() RELEASE() {
+    mutex.unlock();
+  }
+
+  const Mutex &operator!() const { return *this; }
+};
+
+/// Use this class instead of std::lock_guard and std::unique_lock
+class SCOPED_CAPABILITY LockGuard {
+  Mutex &mutex;
+  bool locked;
+
+public:
+  LockGuard(Mutex &mutex_) ACQUIRE(mutex_) : mutex(mutex_) {
+    mutex.lock();
+    locked = true;
+  }
+  void lock() ACQUIRE() {
+    mutex.lock();
+    locked = true;
+  }
+  void unlock() RELEASE() {
+    mutex.unlock();
+    locked = false;
+  }
+  ~LockGuard() RELEASE() {
+    if(locked)
+      mutex.unlock();
+  }
+};
diff --git a/src/notebook.cc b/src/notebook.cc
index 21814ea..193f7ee 100644
--- a/src/notebook.cc
+++ b/src/notebook.cc
@@ -115,7 +115,12 @@ void Notebook::open(const boost::filesystem::path &file_path_, size_t notebook_i
   if(ec)
     canonical_file_path = file_path;
   for(size_t c = 0; c < size(); c++) {
-    if(canonical_file_path == source_views[c]->canonical_file_path) {
+    bool equal;
+    {
+      LockGuard lock(source_views[c]->canonical_file_path_mutex);
+      equal = canonical_file_path == source_views[c]->canonical_file_path;
+    }
+    if(equal) {
       auto notebook_page = get_notebook_page(c);
       notebooks[notebook_page.first].set_current_page(notebook_page.second);
       focus_view(source_views[c]);
diff --git a/src/project.cc b/src/project.cc
index e314b90..c4427d6 100644
--- a/src/project.cc
+++ b/src/project.cc
@@ -3,6 +3,7 @@
 #include "directories.h"
 #include "filesystem.h"
 #include "menu.h"
+#include "mutex.h"
 #include "notebook.h"
 #include "selection_dialog.h"
 #include "terminal.h"
@@ -409,7 +410,7 @@ void Project::LLDB::debug_start() {
           boost::filesystem::path stop_path;
           unsigned stop_line = 0, stop_column = 0;
 
-          std::lock_guard<std::mutex> lock(Debug::LLDB::get().mutex);
+          LockGuard lock(Debug::LLDB::get().mutex);
           auto process = lldb::SBProcess::GetProcessFromEvent(event);
           auto state = lldb::SBProcess::GetStateFromEvent(event);
           lldb::SBStream stream;
diff --git a/src/source_base.cc b/src/source_base.cc
index 9a2a86d..e390bce 100644
--- a/src/source_base.cc
+++ b/src/source_base.cc
@@ -937,7 +937,7 @@ void Source::BaseView::search_occurrences_updated(GtkWidget *widget, GParamSpec
 }
 
 void Source::BaseView::set_snippets() {
-  std::lock_guard<std::mutex> lock(snippets_mutex);
+  LockGuard lock(snippets_mutex);
 
   snippets = nullptr;
 
diff --git a/src/source_base.h b/src/source_base.h
index 225169f..2270d3f 100644
--- a/src/source_base.h
+++ b/src/source_base.h
@@ -1,10 +1,10 @@
 #pragma once
 
+#include "mutex.h"
 #include "snippets.h"
 #include <boost/filesystem.hpp>
 #include <gtksourceviewmm.h>
 #include <list>
-#include <mutex>
 #include <regex>
 #include <set>
 #include <vector>
@@ -136,8 +136,8 @@ namespace Source {
 
     /// After inserting a snippet, one can use tab to select the next argument
     bool keep_snippet_marks = false;
-    std::vector<Snippets::Snippet> *snippets = nullptr;
-    std::mutex snippets_mutex;
+    Mutex snippets_mutex;
+    std::vector<Snippets::Snippet> *snippets GUARDED_BY(snippets_mutex) = nullptr;
     std::list<std::vector<std::pair<Glib::RefPtr<Gtk::TextBuffer::Mark>, Glib::RefPtr<Gtk::TextBuffer::Mark>>>> snippets_marks;
     Glib::RefPtr<Gtk::TextTag> snippet_argument_tag;
     void insert_snippet(Gtk::TextIter iter, Glib::ustring snippet);
diff --git a/src/source_clang.cc b/src/source_clang.cc
index d25c2e9..cd2929c 100644
--- a/src/source_clang.cc
+++ b/src/source_clang.cc
@@ -128,7 +128,10 @@ void Source::ClangViewParse::parse_initialize() {
   clang_tokens_offsets.reserve(clang_tokens->size());
   for(auto &token : *clang_tokens)
     clang_tokens_offsets.emplace_back(token.get_source_range().get_offsets());
-  update_syntax();
+  {
+    LockGuard lock(parse_mutex);
+    update_syntax();
+  }
 
   status_state = "parsing...";
   if(update_status_state)
@@ -140,21 +143,19 @@ void Source::ClangViewParse::parse_initialize() {
       if(parse_state != ParseState::PROCESSING)
         break;
       auto expected = ParseProcessState::STARTING;
-      std::unique_lock<std::mutex> parse_lock(parse_mutex, std::defer_lock);
       if(parse_process_state.compare_exchange_strong(expected, ParseProcessState::PREPROCESSING)) {
         dispatcher.post([this] {
           auto expected = ParseProcessState::PREPROCESSING;
-          std::unique_lock<std::mutex> parse_lock(parse_mutex, std::defer_lock);
-          if(parse_lock.try_lock()) {
+          if(parse_mutex.try_lock()) {
             if(parse_process_state.compare_exchange_strong(expected, ParseProcessState::PROCESSING))
               parse_thread_buffer = get_buffer()->get_text();
-            parse_lock.unlock();
+            parse_mutex.unlock();
           }
           else
             parse_process_state.compare_exchange_strong(expected, ParseProcessState::STARTING);
         });
       }
-      else if(parse_process_state == ParseProcessState::PROCESSING && parse_lock.try_lock()) {
+      else if(parse_process_state == ParseProcessState::PROCESSING && parse_mutex.try_lock()) {
         auto &parse_thread_buffer_raw = const_cast<std::string &>(parse_thread_buffer.raw());
         if(this->language && (this->language->get_id() == "chdr" || this->language->get_id() == "cpphdr"))
           clangmm::remove_include_guard(parse_thread_buffer_raw);
@@ -168,10 +169,9 @@ void Source::ClangViewParse::parse_initialize() {
             for(auto &token : *clang_tokens)
               clang_tokens_offsets.emplace_back(token.get_source_range().get_offsets());
             clang_diagnostics = clang_tu->get_diagnostics();
-            parse_lock.unlock();
+            parse_mutex.unlock();
             dispatcher.post([this] {
-              std::unique_lock<std::mutex> parse_lock(parse_mutex, std::defer_lock);
-              if(parse_lock.try_lock()) {
+              if(parse_mutex.try_lock()) {
                 auto expected = ParseProcessState::POSTPROCESSING;
                 if(parse_process_state.compare_exchange_strong(expected, ParseProcessState::IDLE)) {
                   update_syntax();
@@ -181,16 +181,16 @@ void Source::ClangViewParse::parse_initialize() {
                   if(update_status_state)
                     update_status_state(this);
                 }
-                parse_lock.unlock();
+                parse_mutex.unlock();
               }
             });
           }
           else
-            parse_lock.unlock();
+            parse_mutex.unlock();
         }
         else {
           parse_state = ParseState::STOP;
-          parse_lock.unlock();
+          parse_mutex.unlock();
           dispatcher.post([this] {
             Terminal::get().print("Error: failed to reparse " + this->file_path.string() + ".\n", true);
             status_state = "";
@@ -562,7 +562,7 @@ Source::ClangViewAutocomplete::ClangViewAutocomplete(const boost::filesystem::pa
   };
 
   autocomplete.get_parse_lock = [this]() {
-    return std::make_unique<std::lock_guard<std::mutex>>(parse_mutex);
+    return std::make_unique<LockGuard>(parse_mutex);
   };
 
   autocomplete.stop_parse = [this]() {
@@ -640,7 +640,7 @@ Source::ClangViewAutocomplete::ClangViewAutocomplete(const boost::filesystem::pa
     std::smatch sm;
     if(std::regex_match(line, sm, regex)) {
       {
-        std::lock_guard<std::mutex> lock(autocomplete.prefix_mutex);
+        LockGuard lock(autocomplete.prefix_mutex);
         autocomplete.prefix = sm.length(2) ? sm[3].str() : sm.length(4) ? sm[5].str() : sm[6].str();
         if(!sm.length(2) && !sm.length(4))
           enable_snippets = true;
@@ -649,7 +649,7 @@ Source::ClangViewAutocomplete::ClangViewAutocomplete(const boost::filesystem::pa
     }
     else if(is_possible_argument()) {
       show_parameters = true;
-      std::lock_guard<std::mutex> lock(autocomplete.prefix_mutex);
+      LockGuard lock(autocomplete.prefix_mutex);
       autocomplete.prefix = "";
       return true;
     }
@@ -662,7 +662,7 @@ Source::ClangViewAutocomplete::ClangViewAutocomplete(const boost::filesystem::pa
         iter.forward_char();
 
       {
-        std::lock_guard<std::mutex> lock(autocomplete.prefix_mutex);
+        LockGuard lock(autocomplete.prefix_mutex);
         autocomplete.prefix = get_buffer()->get_text(iter, end_iter);
       }
       auto prev1 = iter;
@@ -712,7 +712,7 @@ Source::ClangViewAutocomplete::ClangViewAutocomplete(const boost::filesystem::pa
     if(autocomplete.state == Autocomplete::State::STARTING) {
       std::string prefix;
       {
-        std::lock_guard<std::mutex> lock(autocomplete.prefix_mutex);
+        LockGuard lock(autocomplete.prefix_mutex);
         prefix = autocomplete.prefix;
       }
 
@@ -782,7 +782,7 @@ Source::ClangViewAutocomplete::ClangViewAutocomplete(const boost::filesystem::pa
         }
       }
       if(!show_parameters && enable_snippets) {
-        std::lock_guard<std::mutex> lock(snippets_mutex);
+        LockGuard lock(snippets_mutex);
         if(snippets) {
           for(auto &snippet : *snippets) {
             if(prefix.compare(0, prefix.size(), snippet.prefix, 0, prefix.size()) == 0) {
diff --git a/src/source_clang.h b/src/source_clang.h
index 04e0651..541c4c9 100644
--- a/src/source_clang.h
+++ b/src/source_clang.h
@@ -2,11 +2,11 @@
 #include "autocomplete.h"
 #include "clangmm.h"
 #include "dispatcher.h"
+#include "mutex.h"
 #include "source.h"
 #include "terminal.h"
 #include <atomic>
 #include <map>
-#include <mutex>
 #include <set>
 #include <thread>
 
@@ -37,22 +37,22 @@ namespace Source {
 
     std::vector<FixIt> fix_its;
 
+    Mutex parse_mutex;
     std::thread parse_thread;
-    std::mutex parse_mutex;
     std::atomic<ParseState> parse_state;
     std::atomic<ParseProcessState> parse_process_state;
 
     CXCompletionString selected_completion_string = nullptr;
 
   private:
-    Glib::ustring parse_thread_buffer;
+    Glib::ustring parse_thread_buffer GUARDED_BY(parse_mutex);
 
     static const std::map<int, std::string> &clang_types();
-    void update_syntax();
+    void update_syntax() REQUIRES(parse_mutex);
     std::map<int, Glib::RefPtr<Gtk::TextTag>> syntax_tags;
 
-    void update_diagnostics();
-    std::vector<clangmm::Diagnostic> clang_diagnostics;
+    void update_diagnostics() REQUIRES(parse_mutex);
+    std::vector<clangmm::Diagnostic> clang_diagnostics GUARDED_BY(parse_mutex);
   };
 
   class ClangViewAutocomplete : public virtual ClangViewParse {
diff --git a/src/source_diff.cc b/src/source_diff.cc
index ee7cc6f..517d2b9 100644
--- a/src/source_diff.cc
+++ b/src/source_diff.cc
@@ -80,8 +80,9 @@ void Source::DiffView::configure() {
     if(parse_thread.joinable())
       parse_thread.join();
     repository = nullptr;
-    diff = nullptr;
 
+    LockGuard lock(parse_mutex);
+    diff = nullptr;
     return;
   }
   else
@@ -149,7 +150,7 @@ void Source::DiffView::configure() {
       delayed_monitor_changed_connection = Glib::signal_timeout().connect([this]() {
         monitor_changed = true;
         parse_state = ParseState::STARTING;
-        std::lock_guard<std::mutex> lock(parse_mutex);
+        LockGuard lock(parse_mutex);
         diff = nullptr;
         return false;
       }, 500);
@@ -159,7 +160,10 @@ void Source::DiffView::configure() {
   parse_thread = std::thread([this]() {
     std::string status_branch;
     try {
-      diff = get_diff();
+      {
+        LockGuard lock(parse_mutex);
+        diff = get_diff();
+      }
       status_branch = repository->get_branch();
     }
     catch(const std::exception &) {
@@ -177,22 +181,20 @@ void Source::DiffView::configure() {
           std::this_thread::sleep_for(std::chrono::milliseconds(10));
         if(parse_stop)
           break;
-        std::unique_lock<std::mutex> parse_lock(parse_mutex, std::defer_lock);
         auto expected = ParseState::STARTING;
         if(parse_state.compare_exchange_strong(expected, ParseState::PREPROCESSING)) {
           dispatcher.post([this] {
             auto expected = ParseState::PREPROCESSING;
-            std::unique_lock<std::mutex> parse_lock(parse_mutex, std::defer_lock);
-            if(parse_lock.try_lock()) {
+            if(parse_mutex.try_lock()) {
               if(parse_state.compare_exchange_strong(expected, ParseState::PROCESSING))
                 parse_buffer = get_buffer()->get_text();
-              parse_lock.unlock();
+              parse_mutex.unlock();
             }
             else
               parse_state.compare_exchange_strong(expected, ParseState::STARTING);
           });
         }
-        else if(parse_state == ParseState::PROCESSING && parse_lock.try_lock()) {
+        else if(parse_state == ParseState::PROCESSING && parse_mutex.try_lock()) {
           bool expected_monitor_changed = true;
           if(monitor_changed.compare_exchange_strong(expected_monitor_changed, false)) {
             try {
@@ -226,16 +228,18 @@ void Source::DiffView::configure() {
           }
           auto expected = ParseState::PROCESSING;
           if(parse_state.compare_exchange_strong(expected, ParseState::POSTPROCESSING)) {
-            parse_lock.unlock();
+            parse_mutex.unlock();
             dispatcher.post([this] {
-              std::unique_lock<std::mutex> parse_lock(parse_mutex, std::defer_lock);
-              if(parse_lock.try_lock()) {
+              if(parse_mutex.try_lock()) {
                 auto expected = ParseState::POSTPROCESSING;
                 if(parse_state.compare_exchange_strong(expected, ParseState::IDLE))
                   update_lines();
+                parse_mutex.unlock();
               }
             });
           }
+          else
+            parse_mutex.unlock();
         }
       }
     }
@@ -256,7 +260,7 @@ void Source::DiffView::configure() {
 void Source::DiffView::rename(const boost::filesystem::path &path) {
   Source::BaseView::rename(path);
 
-  std::lock_guard<std::mutex> lock(canonical_file_path_mutex);
+  LockGuard lock(canonical_file_path_mutex);
   boost::system::error_code ec;
   canonical_file_path = boost::filesystem::canonical(path, ec);
   if(ec)
@@ -293,14 +297,16 @@ void Source::DiffView::git_goto_next_diff() {
 
 std::string Source::DiffView::git_get_diff_details() {
   std::string details;
-  if(diff) {
-    auto line_nr = get_buffer()->get_insert()->get_iter().get_line();
-    auto iter = get_buffer()->get_iter_at_line(line_nr);
-    if(iter.has_tag(renderer->tag_removed_above))
-      --line_nr;
-    std::lock_guard<std::mutex> lock(parse_mutex);
-    parse_buffer = get_buffer()->get_text();
-    details = diff->get_details(parse_buffer.raw(), line_nr);
+  {
+    LockGuard lock(parse_mutex);
+    if(diff) {
+      auto line_nr = get_buffer()->get_insert()->get_iter().get_line();
+      auto iter = get_buffer()->get_iter_at_line(line_nr);
+      if(iter.has_tag(renderer->tag_removed_above))
+        --line_nr;
+      parse_buffer = get_buffer()->get_text();
+      details = diff->get_details(parse_buffer.raw(), line_nr);
+    }
   }
   if(details.empty())
     Info::get().print("No changes found at current line");
@@ -312,7 +318,7 @@ std::unique_ptr<Git::Repository::Diff> Source::DiffView::get_diff() {
   auto work_path = filesystem::get_normal_path(repository->get_work_path());
   boost::filesystem::path relative_path;
   {
-    std::lock_guard<std::mutex> lock(canonical_file_path_mutex);
+    LockGuard lock(canonical_file_path_mutex);
     if(!filesystem::file_in_path(canonical_file_path, work_path))
       throw std::runtime_error("not a relative path");
     relative_path = filesystem::get_relative_path(canonical_file_path, work_path);
diff --git a/src/source_diff.h b/src/source_diff.h
index df961b4..4d29a49 100644
--- a/src/source_diff.h
+++ b/src/source_diff.h
@@ -1,11 +1,11 @@
 #pragma once
 #include "dispatcher.h"
 #include "git.h"
+#include "mutex.h"
 #include "source_base.h"
 #include <atomic>
 #include <boost/filesystem.hpp>
 #include <map>
-#include <mutex>
 #include <set>
 #include <thread>
 
@@ -40,24 +40,25 @@ namespace Source {
     void git_goto_next_diff();
     std::string git_get_diff_details();
 
+    Mutex canonical_file_path_mutex;
     /// Use canonical path to follow symbolic links
-    boost::filesystem::path canonical_file_path;
+    boost::filesystem::path canonical_file_path GUARDED_BY(canonical_file_path_mutex);
 
   private:
-    std::mutex canonical_file_path_mutex;
-
     std::unique_ptr<Renderer> renderer;
     Dispatcher dispatcher;
 
+
+    Mutex parse_mutex;
+
     std::shared_ptr<Git::Repository> repository;
-    std::unique_ptr<Git::Repository::Diff> diff;
+    std::unique_ptr<Git::Repository::Diff> diff GUARDED_BY(parse_mutex);
     std::unique_ptr<Git::Repository::Diff> get_diff();
 
     std::thread parse_thread;
     std::atomic<ParseState> parse_state;
-    std::mutex parse_mutex;
     std::atomic<bool> parse_stop;
-    Glib::ustring parse_buffer;
+    Glib::ustring parse_buffer GUARDED_BY(parse_mutex);
     sigc::connection buffer_insert_connection;
     sigc::connection buffer_erase_connection;
     sigc::connection monitor_changed_connection;
@@ -65,7 +66,7 @@ namespace Source {
     sigc::connection delayed_monitor_changed_connection;
     std::atomic<bool> monitor_changed;
 
-    Git::Repository::Diff::Lines lines;
-    void update_lines();
+    Git::Repository::Diff::Lines lines GUARDED_BY(parse_mutex);
+    void update_lines() REQUIRES(parse_mutex);
   };
 } // namespace Source
diff --git a/src/source_generic.cc b/src/source_generic.cc
index ca0809a..7d07161 100644
--- a/src/source_generic.cc
+++ b/src/source_generic.cc
@@ -122,7 +122,7 @@ std::vector<std::pair<Gtk::TextIter, Gtk::TextIter>> Source::GenericView::get_wo
 void Source::GenericView::setup_buffer_words() {
   {
     auto words = get_words(get_buffer()->begin(), get_buffer()->end());
-    std::lock_guard<std::mutex> lock(buffer_words_mutex);
+    LockGuard lock(buffer_words_mutex);
     for(auto &word : words) {
       auto result = buffer_words.emplace(get_buffer()->get_text(word.first, word.second), 1);
       if(!result.second)
@@ -139,7 +139,7 @@ void Source::GenericView::setup_buffer_words() {
     if(is_word_iter(iter)) {
       auto word = get_word(iter);
       if(word.second.get_offset() - word.first.get_offset() >= 3) {
-        std::lock_guard<std::mutex> lock(buffer_words_mutex);
+        LockGuard lock(buffer_words_mutex);
         auto it = buffer_words.find(get_buffer()->get_text(word.first, word.second));
         if(it != buffer_words.end()) {
           if(it->second > 1)
@@ -161,7 +161,7 @@ void Source::GenericView::setup_buffer_words() {
     end.forward_char();
 
     auto words = get_words(start, end);
-    std::lock_guard<std::mutex> lock(buffer_words_mutex);
+    LockGuard lock(buffer_words_mutex);
     for(auto &word : words) {
       auto result = buffer_words.emplace(get_buffer()->get_text(word.first, word.second), 1);
       if(!result.second)
@@ -177,7 +177,7 @@ void Source::GenericView::setup_buffer_words() {
       start.backward_char();
     end.forward_char();
     auto words = get_words(start, end);
-    std::lock_guard<std::mutex> lock(buffer_words_mutex);
+    LockGuard lock(buffer_words_mutex);
     for(auto &word : words) {
       auto it = buffer_words.find(get_buffer()->get_text(word.first, word.second));
       if(it != buffer_words.end()) {
@@ -197,7 +197,7 @@ void Source::GenericView::setup_buffer_words() {
     if(is_word_iter(start)) {
       auto word = get_word(start);
       if(word.second.get_offset() - word.first.get_offset() >= 3) {
-        std::lock_guard<std::mutex> lock(buffer_words_mutex);
+        LockGuard lock(buffer_words_mutex);
         auto result = buffer_words.emplace(get_buffer()->get_text(word.first, word.second), 1);
         if(!result.second)
           ++(result.first->second);
@@ -236,9 +236,8 @@ void Source::GenericView::setup_autocomplete() {
     while(start.backward_char() && ((*start >= '0' && *start <= '9') || (*start >= 'a' && *start <= 'z') || (*start >= 'A' && *start <= 'Z') || *start == '_' || *start >= 0x00C0))
       ++count;
     if((start.is_start() || start.forward_char()) && count >= 3 && !(*start >= '0' && *start <= '9')) {
-      std::lock(autocomplete.prefix_mutex, buffer_words_mutex);
-      std::lock_guard<std::mutex> lock1(autocomplete.prefix_mutex, std::adopt_lock);
-      std::lock_guard<std::mutex> lock2(buffer_words_mutex, std::adopt_lock);
+      LockGuard lock1(autocomplete.prefix_mutex);
+      LockGuard lock2(buffer_words_mutex);
       autocomplete.prefix = get_buffer()->get_text(start, end);
       show_prefix_buffer_word = buffer_words.find(autocomplete.prefix) != buffer_words.end();
       return true;
@@ -250,9 +249,8 @@ void Source::GenericView::setup_autocomplete() {
       }
       if(iter != end_iter)
         iter.forward_char();
-      std::lock(autocomplete.prefix_mutex, buffer_words_mutex);
-      std::lock_guard<std::mutex> lock1(autocomplete.prefix_mutex, std::adopt_lock);
-      std::lock_guard<std::mutex> lock2(buffer_words_mutex, std::adopt_lock);
+      LockGuard lock1(autocomplete.prefix_mutex);
+      LockGuard lock2(buffer_words_mutex);
       autocomplete.prefix = get_buffer()->get_text(iter, end_iter);
       show_prefix_buffer_word = buffer_words.find(autocomplete.prefix) != buffer_words.end();
       return true;
@@ -285,7 +283,7 @@ void Source::GenericView::setup_autocomplete() {
 
       std::string prefix;
       {
-        std::lock_guard<std::mutex> lock(autocomplete.prefix_mutex);
+        LockGuard lock(autocomplete.prefix_mutex);
         prefix = autocomplete.prefix;
       }
       for(auto &keyword : keywords) {
@@ -295,9 +293,8 @@ void Source::GenericView::setup_autocomplete() {
           autocomplete_comment.emplace_back("");
         }
       }
-      bool show_prefix_buffer_word = this->show_prefix_buffer_word;
       {
-        std::lock_guard<std::mutex> lock(buffer_words_mutex);
+        LockGuard lock(buffer_words_mutex);
         for(auto &buffer_word : buffer_words) {
           if((show_prefix_buffer_word || buffer_word.first.size() > prefix.size()) && prefix.compare(0, prefix.size(), buffer_word.first, 0, prefix.size()) == 0 &&
              keywords.find(buffer_word.first) == keywords.end()) {
@@ -307,7 +304,7 @@ void Source::GenericView::setup_autocomplete() {
           }
         }
       }
-      std::lock_guard<std::mutex> lock(snippets_mutex);
+      LockGuard lock(snippets_mutex);
       if(snippets) {
         for(auto &snippet : *snippets) {
           if(prefix.compare(0, prefix.size(), snippet.prefix, 0, prefix.size()) == 0) {
diff --git a/src/source_generic.h b/src/source_generic.h
index 63caf4e..3df7209 100644
--- a/src/source_generic.h
+++ b/src/source_generic.h
@@ -1,6 +1,7 @@
 #pragma once
 
 #include "autocomplete.h"
+#include "mutex.h"
 #include "source.h"
 #include <atomic>
 
@@ -19,10 +20,10 @@ namespace Source {
     std::pair<Gtk::TextIter, Gtk::TextIter> get_word(Gtk::TextIter iter);
     std::vector<std::pair<Gtk::TextIter, Gtk::TextIter>> get_words(const Gtk::TextIter &start, const Gtk::TextIter &end);
 
-    std::mutex buffer_words_mutex;
-    std::map<std::string, size_t> buffer_words;
+    Mutex buffer_words_mutex ACQUIRED_AFTER(autocomplete.prefix_mutex);
+    std::map<std::string, size_t> buffer_words GUARDED_BY(buffer_words_mutex);
+    bool show_prefix_buffer_word GUARDED_BY(buffer_words_mutex) = false; /// To avoid showing the current word if it is unique in document
     void setup_buffer_words();
-    std::atomic<bool> show_prefix_buffer_word = {false}; /// To avoid showing the current word if it is unique in document
 
     Autocomplete autocomplete;
     std::vector<std::string> autocomplete_comment;
diff --git a/src/source_language_protocol.cc b/src/source_language_protocol.cc
index 0798df1..614f0a2 100644
--- a/src/source_language_protocol.cc
+++ b/src/source_language_protocol.cc
@@ -58,16 +58,17 @@ std::shared_ptr<LanguageProtocol::Client> LanguageProtocol::Client::get(const bo
 
   auto cache_id = root_path.string() + '|' + language_id;
 
-  static std::unordered_map<std::string, std::weak_ptr<Client>> cache;
-  static std::mutex mutex;
-  std::lock_guard<std::mutex> lock(mutex);
+  static Mutex mutex;
+  static std::unordered_map<std::string, std::weak_ptr<Client>> cache GUARDED_BY(mutex);
+
+  LockGuard lock(mutex);
   auto it = cache.find(cache_id);
   if(it == cache.end())
     it = cache.emplace(cache_id, std::weak_ptr<Client>()).first;
   auto instance = it->second.lock();
   if(!instance)
     it->second = instance = std::shared_ptr<Client>(new Client(root_path, language_id), [](Client *client_ptr) {
-      std::thread delete_thread([client_ptr] {
+      std::thread delete_thread([client_ptr] { // Delete client in the background
         delete client_ptr;
       });
       delete_thread.detach();
@@ -84,7 +85,7 @@ LanguageProtocol::Client::~Client() {
   });
   result_processed.get_future().get();
 
-  std::lock_guard<std::mutex> lock(timeout_threads_mutex);
+  LockGuard lock(timeout_threads_mutex);
   for(auto &thread : timeout_threads)
     thread.join();
 
@@ -102,17 +103,22 @@ LanguageProtocol::Client::~Client() {
 
 LanguageProtocol::Capabilities LanguageProtocol::Client::initialize(Source::LanguageProtocolView *view) {
   if(view) {
-    std::lock_guard<std::mutex> lock(views_mutex);
+    LockGuard lock(views_mutex);
     views.emplace(view);
   }
 
-  std::lock_guard<std::mutex> lock(initialize_mutex);
+  LockGuard lock(initialize_mutex);
 
   if(initialized)
     return capabilities;
 
   std::promise<void> result_processed;
-  write_request(nullptr, "initialize", "\"processId\":" + std::to_string(process->get_id()) + R"(,"rootUri":")" + filesystem::get_uri_from_path(root_path) + R"(","capabilities":{"workspace":{"didChangeConfiguration":{"dynamicRegistration":true},"didChangeWatchedFiles":{"dynamicRegistration":true},"symbol":{"dynamicRegistration":true},"executeCommand":{"dynamicRegistration":true}},"textDocument":{"synchronization":{"dynamicRegistration":true,"willSave":true,"willSaveWaitUntil":true,"didSave":true},"completion":{"dynamicRegistration":true,"completionItem":{"snippetSupport":true}},"hover":{"dynamicRegistration":true},"signatureHelp":{"dynamicRegistration":true},"definition":{"dynamicRegistration":true},"references":{"dynamicRegistration":true},"documentHighlight":{"dynamicRegistration":true},"documentSymbol":{"dynamicRegistration":true},"codeAction":{"dynamicRegistration":true},"codeLens":{"dynamicRegistration":true},"formatting":{"dynamicRegistration":true},"rangeFormatting":{"dynamicRegistration":true},"onTypeFormatting":{"dynamicRegistration":true},"rename":{"dynamicRegistration":true},"documentLink":{"dynamicRegistration":true}}},"initializationOptions":{"omitInitBuild":true},"trace":"off")", [this, &result_processed](const boost::property_tree::ptree &result, bool error) {
+  TinyProcessLib::Process::id_type process_id;
+  {
+    LockGuard lock(read_write_mutex);
+    process_id = process->get_id();
+  }
+  write_request(nullptr, "initialize", "\"processId\":" + std::to_string(process_id) + R"(,"rootUri":")" + filesystem::get_uri_from_path(root_path) + R"(","capabilities":{"workspace":{"didChangeConfiguration":{"dynamicRegistration":true},"didChangeWatchedFiles":{"dynamicRegistration":true},"symbol":{"dynamicRegistration":true},"executeCommand":{"dynamicRegistration":true}},"textDocument":{"synchronization":{"dynamicRegistration":true,"willSave":true,"willSaveWaitUntil":true,"didSave":true},"completion":{"dynamicRegistration":true,"completionItem":{"snippetSupport":true}},"hover":{"dynamicRegistration":true},"signatureHelp":{"dynamicRegistration":true},"definition":{"dynamicRegistration":true},"references":{"dynamicRegistration":true},"documentHighlight":{"dynamicRegistration":true},"documentSymbol":{"dynamicRegistration":true},"codeAction":{"dynamicRegistration":true},"codeLens":{"dynamicRegistration":true},"formatting":{"dynamicRegistration":true},"rangeFormatting":{"dynamicRegistration":true},"onTypeFormatting":{"dynamicRegistration":true},"rename":{"dynamicRegistration":true},"documentLink":{"dynamicRegistration":true}}},"initializationOptions":{"omitInitBuild":true},"trace":"off")", [this, &result_processed](const boost::property_tree::ptree &result, bool error) {
     if(!error) {
       auto capabilities_pt = result.find("capabilities");
       if(capabilities_pt != result.not_found()) {
@@ -150,12 +156,12 @@ LanguageProtocol::Capabilities LanguageProtocol::Client::initialize(Source::Lang
 
 void LanguageProtocol::Client::close(Source::LanguageProtocolView *view) {
   {
-    std::lock_guard<std::mutex> lock(views_mutex);
+    LockGuard lock(views_mutex);
     auto it = views.find(view);
     if(it != views.end())
       views.erase(it);
   }
-  std::lock_guard<std::mutex> lock(read_write_mutex);
+  LockGuard lock(read_write_mutex);
   for(auto it = handlers.begin(); it != handlers.end();) {
     if(it->second.first == view)
       it = handlers.erase(it);
@@ -217,7 +223,7 @@ void LanguageProtocol::Client::parse_server_message() {
       auto result_it = pt.find("result");
       auto error_it = pt.find("error");
       {
-        std::unique_lock<std::mutex> lock(read_write_mutex);
+        LockGuard lock(read_write_mutex);
         if(result_it != pt.not_found()) {
           if(message_id) {
             auto id_it = handlers.find(message_id);
@@ -272,21 +278,21 @@ void LanguageProtocol::Client::parse_server_message() {
 }
 
 void LanguageProtocol::Client::write_request(Source::LanguageProtocolView *view, const std::string &method, const std::string &params, std::function<void(const boost::property_tree::ptree &, bool error)> &&function) {
-  std::unique_lock<std::mutex> lock(read_write_mutex);
+  LockGuard lock(read_write_mutex);
   if(function) {
     handlers.emplace(message_id, std::make_pair(view, std::move(function)));
 
     auto message_id = this->message_id;
-    std::lock_guard<std::mutex> lock(timeout_threads_mutex);
+    LockGuard lock(timeout_threads_mutex);
     timeout_threads.emplace_back([this, message_id] {
       for(size_t c = 0; c < 20; ++c) {
         std::this_thread::sleep_for(std::chrono::milliseconds(500));
-        std::lock_guard<std::mutex> lock(read_write_mutex);
+        LockGuard lock(read_write_mutex);
         auto id_it = handlers.find(message_id);
         if(id_it == handlers.end())
           return;
       }
-      std::unique_lock<std::mutex> lock(read_write_mutex);
+      LockGuard lock(read_write_mutex);
       auto id_it = handlers.find(message_id);
       if(id_it != handlers.end()) {
         Terminal::get().async_print("Request to language server timed out. If you suspect the server has crashed, please close and reopen all project source files.\n", true);
@@ -316,7 +322,7 @@ void LanguageProtocol::Client::write_request(Source::LanguageProtocolView *view,
 }
 
 void LanguageProtocol::Client::write_notification(const std::string &method, const std::string &params) {
-  std::lock_guard<std::mutex> lock(read_write_mutex);
+  LockGuard lock(read_write_mutex);
   std::string content(R"({"jsonrpc":"2.0","method":")" + method + R"(","params":{)" + params + "}}");
   auto message = "Content-Length: " + std::to_string(content.size()) + "\r\n\r\n" + content;
   if(Config::get().log.language_server)
@@ -337,7 +343,7 @@ void LanguageProtocol::Client::handle_server_request(const std::string &method,
         catch(...) {
         }
       }
-      std::lock_guard<std::mutex> lock(views_mutex);
+      LockGuard lock(views_mutex);
       for(auto view : views) {
         if(file == view->file_path) {
           view->update_diagnostics(std::move(diagnostics));
@@ -1267,7 +1273,7 @@ void Source::LanguageProtocolView::setup_autocomplete() {
     std::smatch sm;
     if(std::regex_match(line, sm, regex)) {
       {
-        std::lock_guard<std::mutex> lock(autocomplete.prefix_mutex);
+        LockGuard lock(autocomplete.prefix_mutex);
         autocomplete.prefix = sm.length(2) ? sm[3].str() : sm.length(4) ? sm[5].str() : sm[6].str();
         if(!sm.length(2) && !sm.length(4))
           autocomplete_enable_snippets = true;
@@ -1276,7 +1282,7 @@ void Source::LanguageProtocolView::setup_autocomplete() {
     }
     else if(is_possible_argument()) {
       autocomplete_show_parameters = true;
-      std::lock_guard<std::mutex> lock(autocomplete.prefix_mutex);
+      LockGuard lock(autocomplete.prefix_mutex);
       autocomplete.prefix = "";
       return true;
     }
@@ -1289,7 +1295,7 @@ void Source::LanguageProtocolView::setup_autocomplete() {
         iter.forward_char();
 
       {
-        std::lock_guard<std::mutex> lock(autocomplete.prefix_mutex);
+        LockGuard lock(autocomplete.prefix_mutex);
         autocomplete.prefix = get_buffer()->get_text(iter, end_iter);
       }
       auto prev1 = iter;
@@ -1397,7 +1403,7 @@ void Source::LanguageProtocolView::setup_autocomplete() {
               if(!label.empty()) {
                 std::string prefix;
                 {
-                  std::lock_guard<std::mutex> lock(autocomplete.prefix_mutex);
+                  LockGuard lock(autocomplete.prefix_mutex);
                   prefix = autocomplete.prefix;
                 }
                 if(prefix.compare(0, prefix.size(), label, 0, prefix.size()) == 0) {
@@ -1416,10 +1422,10 @@ void Source::LanguageProtocolView::setup_autocomplete() {
             if(autocomplete_enable_snippets) {
               std::string prefix;
               {
-                std::lock_guard<std::mutex> lock(autocomplete.prefix_mutex);
+                LockGuard lock(autocomplete.prefix_mutex);
                 prefix = autocomplete.prefix;
               }
-              std::lock_guard<std::mutex> lock(snippets_mutex);
+              LockGuard lock(snippets_mutex);
               if(snippets) {
                 for(auto &snippet : *snippets) {
                   if(prefix.compare(0, prefix.size(), snippet.prefix, 0, prefix.size()) == 0) {
diff --git a/src/source_language_protocol.h b/src/source_language_protocol.h
index 4467c8c..4668608 100644
--- a/src/source_language_protocol.h
+++ b/src/source_language_protocol.h
@@ -1,12 +1,12 @@
 #pragma once
 #include "autocomplete.h"
+#include "mutex.h"
 #include "process.hpp"
 #include "source.h"
 #include <atomic>
 #include <boost/property_tree/json_parser.hpp>
 #include <list>
 #include <map>
-#include <mutex>
 #include <set>
 #include <sstream>
 
@@ -105,31 +105,32 @@ namespace LanguageProtocol {
 
     Capabilities capabilities;
 
-    std::set<Source::LanguageProtocolView *> views;
-    std::mutex views_mutex;
+    Mutex views_mutex;
+    std::set<Source::LanguageProtocolView *> views GUARDED_BY(views_mutex);
 
-    std::mutex initialize_mutex;
+    Mutex initialize_mutex;
+    bool initialized GUARDED_BY(initialize_mutex) = false;
 
-    std::unique_ptr<TinyProcessLib::Process> process;
-    std::mutex read_write_mutex;
+    Mutex read_write_mutex;
+    std::unique_ptr<TinyProcessLib::Process> process GUARDED_BY(read_write_mutex);
 
     std::stringstream server_message_stream;
     size_t server_message_size = static_cast<size_t>(-1);
     size_t server_message_content_pos;
     bool header_read = false;
 
-    size_t message_id = 1;
+    size_t message_id GUARDED_BY(read_write_mutex) = 1;
 
-    std::map<size_t, std::pair<Source::LanguageProtocolView *, std::function<void(const boost::property_tree::ptree &, bool error)>>> handlers;
-    std::vector<std::thread> timeout_threads;
-    std::mutex timeout_threads_mutex;
+    std::map<size_t, std::pair<Source::LanguageProtocolView *, std::function<void(const boost::property_tree::ptree &, bool error)>>> handlers GUARDED_BY(read_write_mutex);
+
+    Mutex timeout_threads_mutex;
+    std::vector<std::thread> timeout_threads GUARDED_BY(timeout_threads_mutex);
 
   public:
     static std::shared_ptr<Client> get(const boost::filesystem::path &file_path, const std::string &language_id);
 
     ~Client();
 
-    bool initialized = false;
     Capabilities initialize(Source::LanguageProtocolView *view);
     void close(Source::LanguageProtocolView *view);
 
diff --git a/src/terminal.cc b/src/terminal.cc
index 6662eed..939e40d 100644
--- a/src/terminal.cc
+++ b/src/terminal.cc
@@ -79,7 +79,7 @@ int Terminal::process(std::istream &stdin_stream, std::ostream &stdout_stream, c
 
 void Terminal::async_process(const std::string &command, const boost::filesystem::path &path, const std::function<void(int exit_status)> &callback, bool quiet) {
   std::thread async_execute_thread([this, command, path, callback, quiet]() {
-    std::unique_lock<std::mutex> processes_lock(processes_mutex);
+    LockGuard lock(processes_mutex);
     stdin_buffer.clear();
     auto process = std::make_shared<TinyProcessLib::Process>(command, path.string(), [this, quiet](const char *bytes, size_t n) {
       if(!quiet)
@@ -90,7 +90,7 @@ void Terminal::async_process(const std::string &command, const boost::filesystem
     }, true);
     auto pid = process->get_id();
     if(pid <= 0) {
-      processes_lock.unlock();
+      lock.unlock();
       async_print("Error: failed to run command: " + command + "\n", true);
       if(callback)
         callback(-1);
@@ -98,12 +98,12 @@ void Terminal::async_process(const std::string &command, const boost::filesystem
     }
     else {
       processes.emplace_back(process);
-      processes_lock.unlock();
+      lock.unlock();
     }
 
     auto exit_status = process->get_exit_status();
 
-    processes_lock.lock();
+    lock.lock();
     for(auto it = processes.begin(); it != processes.end(); it++) {
       if((*it)->get_id() == pid) {
         processes.erase(it);
@@ -111,7 +111,7 @@ void Terminal::async_process(const std::string &command, const boost::filesystem
       }
     }
     stdin_buffer.clear();
-    processes_lock.unlock();
+    lock.unlock();
 
     if(callback)
       callback(exit_status);
@@ -120,7 +120,7 @@ void Terminal::async_process(const std::string &command, const boost::filesystem
 }
 
 void Terminal::kill_last_async_process(bool force) {
-  std::lock_guard<std::mutex> lock(processes_mutex);
+  LockGuard lock(processes_mutex);
   if(processes.empty())
     Info::get().print("No running processes");
   else
@@ -128,7 +128,7 @@ void Terminal::kill_last_async_process(bool force) {
 }
 
 void Terminal::kill_async_processes(bool force) {
-  std::lock_guard<std::mutex> lock(processes_mutex);
+  LockGuard lock(processes_mutex);
   for(auto &process : processes)
     process->kill(force);
 }
@@ -393,7 +393,7 @@ bool Terminal::on_button_press_event(GdkEventButton *button_event) {
 }
 
 bool Terminal::on_key_press_event(GdkEventKey *event) {
-  std::lock_guard<std::mutex> lock(processes_mutex);
+  LockGuard lock(processes_mutex);
   bool debug_is_running = false;
 #ifdef JUCI_ENABLE_DEBUG
   debug_is_running = Project::current ? Project::current->debug_is_running() : false;
diff --git a/src/terminal.h b/src/terminal.h
index bfc779a..5712f0c 100644
--- a/src/terminal.h
+++ b/src/terminal.h
@@ -1,11 +1,11 @@
 #pragma once
 #include "dispatcher.h"
 #include "gtkmm.h"
+#include "mutex.h"
 #include "process.hpp"
 #include <boost/filesystem.hpp>
 #include <functional>
 #include <iostream>
-#include <mutex>
 #include <tuple>
 
 class Terminal : public Gtk::TextView {
@@ -47,7 +47,7 @@ private:
   std::tuple<size_t, size_t, std::string, std::string, std::string> find_link(const std::string &line);
   void apply_link_tags(const Gtk::TextIter &start_iter, const Gtk::TextIter &end_iter);
 
-  std::vector<std::shared_ptr<TinyProcessLib::Process>> processes;
-  std::mutex processes_mutex;
+  Mutex processes_mutex;
+  std::vector<std::shared_ptr<TinyProcessLib::Process>> processes GUARDED_BY(processes_mutex);
   Glib::ustring stdin_buffer;
 };
diff --git a/src/usages_clang.cc b/src/usages_clang.cc
index a1bf45d..592d096 100644
--- a/src/usages_clang.cc
+++ b/src/usages_clang.cc
@@ -3,6 +3,7 @@
 #include "config.h"
 #include "dialogs.h"
 #include "filesystem.h"
+#include "utility.h"
 #include <chrono>
 #include <fstream>
 #include <regex>
@@ -22,7 +23,7 @@ pid_t get_current_process_id() {
 
 const boost::filesystem::path Usages::Clang::cache_folder = ".usages_clang";
 std::map<boost::filesystem::path, Usages::Clang::Cache> Usages::Clang::caches;
-std::mutex Usages::Clang::caches_mutex;
+Mutex Usages::Clang::caches_mutex;
 std::atomic<size_t> Usages::Clang::cache_in_progress_count(0);
 
 bool Usages::Clang::Cache::Cursor::operator==(const Cursor &o) {
@@ -170,7 +171,7 @@ std::vector<Usages::Clang::Usages> Usages::Clang::get_usages(const boost::filesy
 
   // Use cache
   for(auto it = potential_paths.begin(); it != potential_paths.end();) {
-    std::lock_guard<std::mutex> lock(caches_mutex);
+    LockGuard lock(caches_mutex);
     auto caches_it = caches.find(*it);
 
     // Load cache from file if not found in memory and if cache file exists
@@ -221,21 +222,14 @@ std::vector<Usages::Clang::Usages> Usages::Clang::get_usages(const boost::filesy
         while(true) {
           boost::filesystem::path path;
           {
-            static std::mutex mutex;
-            std::lock_guard<std::mutex> lock(mutex);
+            static Mutex mutex;
+            LockGuard lock(mutex);
             if(it == potential_paths.end())
               return;
             path = *it;
             ++it;
           }
 
-          // {
-          //   static std::mutex mutex;
-          //   std::lock_guard<std::mutex> lock(mutex);
-          //   std::cout << "parsing: " << path << std::endl;
-          // }
-          // auto before_time = std::chrono::system_clock::now();
-
           std::ifstream stream(path.string(), std::ifstream::binary);
           std::string buffer;
           buffer.assign(std::istreambuf_iterator<char>(stream), std::istreambuf_iterator<char>());
@@ -256,8 +250,8 @@ std::vector<Usages::Clang::Usages> Usages::Clang::get_usages(const boost::filesy
           clangmm::TranslationUnit translation_unit(std::make_shared<clangmm::Index>(0, 0), path.string(), arguments, &buffer, flags);
 
           {
-            static std::mutex mutex;
-            std::lock_guard<std::mutex> lock(mutex);
+            static Mutex mutex;
+            LockGuard lock(mutex);
             add_usages(project_path, build_path, path, usages, visited, spelling, cursor, &translation_unit, true);
             add_usages_from_includes(project_path, build_path, usages, visited, spelling, cursor, &translation_unit, true);
           }
@@ -279,22 +273,13 @@ std::vector<Usages::Clang::Usages> Usages::Clang::get_usages(const boost::filesy
 
 void Usages::Clang::cache(const boost::filesystem::path &project_path, const boost::filesystem::path &build_path, const boost::filesystem::path &path,
                           std::time_t before_parse_time, const PathSet &project_paths_in_use, clangmm::TranslationUnit *translation_unit, clangmm::Tokens *tokens) {
-  class ScopeExit {
-  public:
-    std::function<void()> f;
-    ~ScopeExit() {
-      f();
-    }
-  };
-  ScopeExit scope_exit{[] {
-    --cache_in_progress_count;
-  }};
+  ScopeGuard guard{[] { --cache_in_progress_count; }};
 
   if(project_path.empty())
     return;
 
   {
-    std::lock_guard<std::mutex> lock(caches_mutex);
+    LockGuard lock(caches_mutex);
     if(project_paths_in_use.count(project_path)) {
       caches.erase(path);
       caches.emplace(path, Cache(project_path, build_path, path, before_parse_time, translation_unit, tokens));
@@ -329,7 +314,7 @@ void Usages::Clang::cache(const boost::filesystem::path &project_path, const boo
     if(file_size == static_cast<boost::uintmax_t>(-1) || ec)
       continue;
     auto tokens = translation_unit->get_tokens(path.string(), 0, file_size - 1);
-    std::lock_guard<std::mutex> lock(caches_mutex);
+    LockGuard lock(caches_mutex);
     if(project_paths_in_use.count(project_path)) {
       caches.erase(path);
       caches.emplace(path, Cache(project_path, build_path, path, before_parse_time, translation_unit, tokens.get()));
@@ -340,7 +325,7 @@ void Usages::Clang::cache(const boost::filesystem::path &project_path, const boo
 }
 
 void Usages::Clang::erase_unused_caches(const PathSet &project_paths_in_use) {
-  std::lock_guard<std::mutex> lock(caches_mutex);
+  LockGuard lock(caches_mutex);
   for(auto it = caches.begin(); it != caches.end();) {
     bool found = false;
     for(auto &project_path : project_paths_in_use) {
@@ -359,7 +344,7 @@ void Usages::Clang::erase_unused_caches(const PathSet &project_paths_in_use) {
 }
 
 void Usages::Clang::erase_cache(const boost::filesystem::path &path) {
-  std::lock_guard<std::mutex> lock(caches_mutex);
+  LockGuard lock(caches_mutex);
 
   auto it = caches.find(path);
   if(it == caches.end())
@@ -377,7 +362,7 @@ void Usages::Clang::erase_all_caches_for_project(const boost::filesystem::path &
   if(cache_in_progress_count != 0)
     std::this_thread::sleep_for(std::chrono::milliseconds(10));
 
-  std::lock_guard<std::mutex> lock(caches_mutex);
+  LockGuard lock(caches_mutex);
   boost::system::error_code ec;
   auto usages_clang_path = build_path / cache_folder;
   if(boost::filesystem::exists(usages_clang_path, ec) && boost::filesystem::is_directory(usages_clang_path, ec)) {
@@ -440,7 +425,7 @@ void Usages::Clang::add_usages(const boost::filesystem::path &project_path, cons
   }
 
   if(store_in_cache && filesystem::file_in_path(path, project_path)) {
-    std::lock_guard<std::mutex> lock(caches_mutex);
+    LockGuard lock(caches_mutex);
     caches.erase(path);
     caches.emplace(path, Cache(project_path, build_path, path, before_parse_time, translation_unit, tokens.get()));
   }
diff --git a/src/usages_clang.h b/src/usages_clang.h
index 56ae3f2..7fe60db 100644
--- a/src/usages_clang.h
+++ b/src/usages_clang.h
@@ -1,5 +1,6 @@
 #pragma once
 #include "clangmm.h"
+#include "mutex.h"
 #include <atomic>
 #include <boost/archive/text_iarchive.hpp>
 #include <boost/archive/text_oarchive.hpp>
@@ -8,7 +9,6 @@
 #include <boost/serialization/unordered_set.hpp>
 #include <boost/serialization/vector.hpp>
 #include <map>
-#include <mutex>
 #include <regex>
 #include <set>
 #include <unordered_set>
@@ -102,8 +102,8 @@ namespace Usages {
   private:
     const static boost::filesystem::path cache_folder;
 
-    static std::map<boost::filesystem::path, Cache> caches;
-    static std::mutex caches_mutex;
+    static Mutex caches_mutex;
+    static std::map<boost::filesystem::path, Cache> caches GUARDED_BY(caches_mutex);
 
     static std::atomic<size_t> cache_in_progress_count;
 
@@ -142,7 +142,7 @@ namespace Usages {
     static std::pair<Clang::PathSet, Clang::PathSet> find_potential_paths(const PathSet &paths, const boost::filesystem::path &project_path,
                                                                           const std::map<boost::filesystem::path, PathSet> &paths_includes, const PathSet &paths_with_spelling);
 
-    static void write_cache(const boost::filesystem::path &path, const Cache &cache);
-    static Cache read_cache(const boost::filesystem::path &project_path, const boost::filesystem::path &build_path, const boost::filesystem::path &path);
+    static void write_cache(const boost::filesystem::path &path, const Cache &cache) REQUIRES(caches_mutex);
+    static Cache read_cache(const boost::filesystem::path &project_path, const boost::filesystem::path &build_path, const boost::filesystem::path &path) REQUIRES(caches_mutex);
   };
 } // namespace Usages
diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index 833ef76..420bb5f 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -1,4 +1,8 @@
 add_compile_options(-fno-access-control)
+if(CMAKE_CXX_COMPILER_ID MATCHES "Clang")
+  add_compile_options(-Wno-thread-safety)
+endif()
+
 add_definitions(-DJUCI_BUILD_PATH="${CMAKE_BINARY_DIR}" -DJUCI_TESTS_PATH="${CMAKE_CURRENT_SOURCE_DIR}")
 
 include_directories(
diff --git a/tests/lldb_test.cc b/tests/lldb_test.cc
index 1c99d3f..9ab9d6b 100644
--- a/tests/lldb_test.cc
+++ b/tests/lldb_test.cc
@@ -85,7 +85,7 @@ int main() {
     exited = true;
   });
   Debug::LLDB::get().on_event.emplace_back([&](const lldb::SBEvent &event) {
-    std::unique_lock<std::mutex> lock(Debug::LLDB::get().mutex);
+    LockGuard lock(Debug::LLDB::get().mutex);
     auto process = lldb::SBProcess::GetProcessFromEvent(event);
     auto state = lldb::SBProcess::GetStateFromEvent(event);
     if(state == lldb::StateType::eStateStopped) {