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magnum/src/Magnum/Trade/Data.cpp

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Trade: new enum for describing data ownership. Will be used for MeshData that don't own the memory.
7 years ago
/*
This file is part of Magnum.
Updated copyright year.
6 years ago
Copyright © 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019,
Updated copyright year.
5 years ago
2020, 2021 Vladimír Vondruš <mosra@centrum.cz>
Trade: new enum for describing data ownership. Will be used for MeshData that don't own the memory.
7 years ago
Permission is hereby granted, free of charge, to any person obtaining a
copy of this software and associated documentation files (the "Software"),
to deal in the Software without restriction, including without limitation
the rights to use, copy, modify, merge, publish, distribute, sublicense,
and/or sell copies of the Software, and to permit persons to whom the
Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included
in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
DEALINGS IN THE SOFTWARE.
*/
#include "Data.h"
#include <Corrade/Containers/EnumSet.hpp>
namespace Magnum { namespace Trade {
Debug& operator<<(Debug& debug, const DataFlag value) {
debug << "Trade::DataFlag" << Debug::nospace;
switch(value) {
/* LCOV_EXCL_START */
#define _c(v) case DataFlag::v: return debug << "::" #v;
_c(Owned)
Trade: ability to open non-temporary memory. Using openMemory() instead of openData() allows the implementation to assume the data will stay in scope for as long as needed, which can prevent unnecessary copies in some plugin implementations. It warranted a new flag, DataFlag::ExternallyOwned, to describe this kind of memory. I couldn't reuse Owned as that's used for allocations owned by the instance, which is too little for certain future use cases. For example returning *Data instances referencing an Owned memory would mean the user has to assume the memory is gone when the importer instance is gone, and that's generally not true for memory passed to openMemory(). Originally I thought I would do this later, but then realized the existing plugin implementations would need to get all updated again to be aware of the new flag, with some being forgotten, and it's just easier to do the whole thing in a single step.
5 years ago
_c(ExternallyOwned)
Trade: new enum for describing data ownership. Will be used for MeshData that don't own the memory.
7 years ago
_c(Mutable)
#undef _c
/* LCOV_EXCL_STOP */
}
return debug << "(" << Debug::nospace << reinterpret_cast<void*>(UnsignedByte(value)) << Debug::nospace << ")";
}
Debug& operator<<(Debug& debug, const DataFlags value) {
return Containers::enumSetDebugOutput(debug, value, "Trade::DataFlags{}", {
DataFlag::Owned,
Trade: ability to open non-temporary memory. Using openMemory() instead of openData() allows the implementation to assume the data will stay in scope for as long as needed, which can prevent unnecessary copies in some plugin implementations. It warranted a new flag, DataFlag::ExternallyOwned, to describe this kind of memory. I couldn't reuse Owned as that's used for allocations owned by the instance, which is too little for certain future use cases. For example returning *Data instances referencing an Owned memory would mean the user has to assume the memory is gone when the importer instance is gone, and that's generally not true for memory passed to openMemory(). Originally I thought I would do this later, but then realized the existing plugin implementations would need to get all updated again to be aware of the new flag, with some being forgotten, and it's just easier to do the whole thing in a single step.
5 years ago
DataFlag::ExternallyOwned,
Trade: new enum for describing data ownership. Will be used for MeshData that don't own the memory.
7 years ago
DataFlag::Mutable});
}
Trade: implement mutable data access in MeshData. Turns out the design wasn't so simple after all. AnimationData and ImageData classes will follow with similar changes.
7 years ago
namespace Implementation {
void nonOwnedArrayDeleter(char*, std::size_t) { /* does nothing */ }
}
Trade: new enum for describing data ownership. Will be used for MeshData that don't own the memory.
7 years ago
}}