forked from mirrors/gecko-dev
100 lines
2.3 KiB
C++
100 lines
2.3 KiB
C++
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef dom_canvas_DmdStdContainers_h
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#define dom_canvas_DmdStdContainers_h
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#include "mozilla/MemoryReporting.h"
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#include "mozilla/layers/BuildConstants.h"
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#include <unordered_map>
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#include <unordered_set>
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namespace mozilla::webgl {
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// -
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template <class T>
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class dmd_allocator {
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public:
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using value_type = T;
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private:
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size_t mMallocSize = 0;
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public:
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dmd_allocator() = default;
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// -
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template <class U>
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friend class dmd_allocator;
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template <class U>
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explicit dmd_allocator(const dmd_allocator<U>& rhs) {
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if constexpr (kIsDmd) {
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mMallocSize = rhs.mMallocSize;
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}
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}
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// -
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value_type* allocate(const size_t n) {
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const auto p = std::allocator<value_type>{}.allocate(n);
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if constexpr (kIsDmd) {
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mMallocSize += moz_malloc_size_of(p);
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}
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return p;
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}
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void deallocate(value_type* const p, const size_t n) {
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if constexpr (kIsDmd) {
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mMallocSize -= moz_malloc_size_of(p);
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}
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std::allocator<value_type>{}.deallocate(p, n);
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}
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// -
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size_t SizeOfExcludingThis(mozilla::MallocSizeOf) const {
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return mMallocSize;
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}
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};
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// -
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template <class Key, class T, class Hash = std::hash<Key>,
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class KeyEqual = std::equal_to<Key>,
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class Allocator = dmd_allocator<std::pair<const Key, T>>,
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class _StdT = std::unordered_map<Key, T, Hash, KeyEqual, Allocator>>
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class dmd_unordered_map : public _StdT {
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public:
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using StdT = _StdT;
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size_t SizeOfExcludingThis(mozilla::MallocSizeOf mso) const {
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const auto& a = StdT::get_allocator();
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return a.SizeOfExcludingThis(mso);
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}
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};
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// -
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template <class Key, class Hash = std::hash<Key>,
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class KeyEqual = std::equal_to<Key>,
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class Allocator = dmd_allocator<Key>,
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class _StdT = std::unordered_set<Key, Hash, KeyEqual, Allocator>>
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class dmd_unordered_set : public _StdT {
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public:
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using StdT = _StdT;
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size_t SizeOfExcludingThis(mozilla::MallocSizeOf mso) const {
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const auto& a = StdT::get_allocator();
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return a.SizeOfExcludingThis(mso);
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}
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};
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// -
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} // namespace mozilla::webgl
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#endif // dom_canvas_DmdStdContainers_h
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