зеркало из https://github.com/mozilla/gecko-dev.git
61 строка
1.8 KiB
C++
61 строка
1.8 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* 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 include_dom_media_ipc_ShmemRecycleAllocator_h
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#define include_dom_media_ipc_ShmemRecycleAllocator_h
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#include "mozilla/ShmemPool.h"
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namespace mozilla {
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template <class T>
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class ShmemRecycleAllocator {
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public:
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explicit ShmemRecycleAllocator(T* aActor)
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: mActor(aActor), mPool(1, ShmemPool::PoolType::DynamicPool) {}
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ShmemBuffer AllocateBuffer(size_t aSize,
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ShmemPool::AllocationPolicy aPolicy =
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ShmemPool::AllocationPolicy::Unsafe) {
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ShmemBuffer buffer = mPool.Get(mActor, aSize, aPolicy);
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if (!buffer.Valid()) {
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return buffer;
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}
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MOZ_DIAGNOSTIC_ASSERT(aSize <= buffer.Get().Size<uint8_t>());
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mUsedShmems.AppendElement(buffer.Get());
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mNeedCleanup = true;
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return buffer;
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}
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void ReleaseBuffer(ShmemBuffer&& aBuffer) { mPool.Put(std::move(aBuffer)); }
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void ReleaseAllBuffers() {
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for (auto&& mem : mUsedShmems) {
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ReleaseBuffer(ShmemBuffer(mem.Get()));
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}
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mUsedShmems.Clear();
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}
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void CleanupShmemRecycleAllocator() {
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ReleaseAllBuffers();
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mPool.Cleanup(mActor);
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mNeedCleanup = false;
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}
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~ShmemRecycleAllocator() {
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MOZ_DIAGNOSTIC_ASSERT(mUsedShmems.IsEmpty() && !mNeedCleanup,
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"Shmems not all deallocated");
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}
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private:
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T* const mActor;
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ShmemPool mPool;
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AutoTArray<ShmemBuffer, 4> mUsedShmems;
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bool mNeedCleanup = false;
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};
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} // namespace mozilla
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#endif // include_dom_media_ipc_ShmemRecycleAllocator_h
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