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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef include_dom_media_ipc_ShmemRecycleAllocator_h
#define include_dom_media_ipc_ShmemRecycleAllocator_h
#include "mozilla/ShmemPool.h"
namespace mozilla {
template <class T>
class ShmemRecycleAllocator {
public:
explicit ShmemRecycleAllocator(T* aActor)
: mActor(aActor), mPool(1, ShmemPool::PoolType::DynamicPool) {}
ShmemBuffer AllocateBuffer(size_t aSize,
ShmemPool::AllocationPolicy aPolicy =
ShmemPool::AllocationPolicy::Unsafe) {
ShmemBuffer buffer = mPool.Get(mActor, aSize, aPolicy);
if (!buffer.Valid()) {
return buffer;
}
MOZ_DIAGNOSTIC_ASSERT(aSize <= buffer.Get().Size<uint8_t>());
mUsedShmems.AppendElement(buffer.Get());
mNeedCleanup = true;
return buffer;
}
void ReleaseBuffer(ShmemBuffer&& aBuffer) { mPool.Put(std::move(aBuffer)); }
void ReleaseAllBuffers() {
for (auto&& mem : mUsedShmems) {
ReleaseBuffer(ShmemBuffer(mem.Get()));
}
mUsedShmems.Clear();
}
void CleanupShmemRecycleAllocator() {
ReleaseAllBuffers();
mPool.Cleanup(mActor);
mNeedCleanup = false;
}
~ShmemRecycleAllocator() {
MOZ_DIAGNOSTIC_ASSERT(mUsedShmems.IsEmpty() && !mNeedCleanup,
"Shmems not all deallocated");
}
private:
T* const mActor;
ShmemPool mPool;
AutoTArray<ShmemBuffer, 4> mUsedShmems;
bool mNeedCleanup = false;
};
} // namespace mozilla
#endif // include_dom_media_ipc_ShmemRecycleAllocator_h
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