44 lines
1.3 KiB
C++
44 lines
1.3 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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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 GMPSharedMemManager_h_
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#define GMPSharedMemManager_h_
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#include "mozilla/ipc/Shmem.h"
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#include "nsTArray.h"
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namespace mozilla::gmp {
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enum class GMPSharedMemClass { Decoded, Encoded };
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class GMPSharedMemManager {
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public:
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GMPSharedMemManager() = default;
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virtual ~GMPSharedMemManager();
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bool MgrTakeShmem(GMPSharedMemClass aClass, ipc::Shmem* aMem);
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bool MgrTakeShmem(GMPSharedMemClass aClass, size_t aSize, ipc::Shmem* aMem);
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void MgrGiveShmem(GMPSharedMemClass aClass, ipc::Shmem&& aMem);
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void MgrPurgeShmems();
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virtual bool MgrAllocShmem(size_t aSize, ipc::Shmem* aMem) { return false; }
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virtual void MgrDeallocShmem(ipc::Shmem& aMem) = 0;
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protected:
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virtual bool MgrIsOnOwningThread() const = 0;
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static constexpr size_t kMaxPools = 2;
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private:
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void PurgeSmallerShmem(nsTArray<ipc::Shmem>& aPool, size_t aSize);
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static constexpr size_t kMaxPoolLength = 16;
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AutoTArray<ipc::Shmem, kMaxPoolLength> mPool[kMaxPools];
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};
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} // namespace mozilla::gmp
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#endif // GMPSharedMemManager_h_
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