mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
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117 lines
3.6 KiB
C++
117 lines
3.6 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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#include "GMPSharedMemManager.h"
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#include "GMPMessageUtils.h"
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#include "mozilla/ipc/SharedMemory.h"
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#include "mozilla/StaticPtr.h"
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#include "mozilla/ClearOnShutdown.h"
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namespace mozilla {
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namespace gmp {
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// Really one set of pools on each side of the plugin API.
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// YUV buffers go from Encoder parent to child; pool there, and then return
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// with Decoded() frames to the Decoder parent and goes into the parent pool.
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// Compressed (encoded) data goes from the Decoder parent to the child;
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// pool there, and then return with Encoded() frames and goes into the parent
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// pool.
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static StaticAutoPtr<nsTArray<ipc::Shmem>> sGmpFreelist[GMPSharedMemManager::kGMPNumTypes];
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static uint32_t sGMPShmemManagerCount = 0;
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GMPSharedMemManager::GMPSharedMemManager()
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{
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if (!sGMPShmemManagerCount) {
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for (uint32_t i = 0; i < GMPSharedMemManager::kGMPNumTypes; i++) {
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sGmpFreelist[i] = new nsTArray<ipc::Shmem>();
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}
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}
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sGMPShmemManagerCount++;
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}
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GMPSharedMemManager::~GMPSharedMemManager()
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{
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MOZ_ASSERT(sGMPShmemManagerCount > 0);
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sGMPShmemManagerCount--;
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if (!sGMPShmemManagerCount) {
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for (uint32_t i = 0; i < GMPSharedMemManager::kGMPNumTypes; i++) {
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sGmpFreelist[i] = nullptr;
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}
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}
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}
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static nsTArray<ipc::Shmem>&
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GetGmpFreelist(GMPSharedMemManager::GMPMemoryClasses aTypes)
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{
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return *(sGmpFreelist[aTypes]);
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}
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static uint32_t sGmpAllocated[GMPSharedMemManager::kGMPNumTypes]; // 0's
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bool
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GMPSharedMemManager::MgrAllocShmem(GMPMemoryClasses aClass, size_t aSize,
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ipc::Shmem::SharedMemory::SharedMemoryType aType,
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ipc::Shmem* aMem)
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{
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CheckThread();
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// first look to see if we have a free buffer large enough
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for (uint32_t i = 0; i < GetGmpFreelist(aClass).Length(); i++) {
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MOZ_ASSERT(GetGmpFreelist(aClass)[i].IsWritable());
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if (aSize <= GetGmpFreelist(aClass)[i].Size<uint8_t>()) {
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*aMem = GetGmpFreelist(aClass)[i];
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GetGmpFreelist(aClass).RemoveElementAt(i);
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return true;
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}
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}
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// Didn't find a buffer free with enough space; allocate one
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size_t pagesize = ipc::SharedMemory::SystemPageSize();
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aSize = (aSize + (pagesize-1)) & ~(pagesize-1); // round up to page size
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bool retval = Alloc(aSize, aType, aMem);
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if (retval) {
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sGmpAllocated[aClass]++;
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}
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return retval;
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}
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bool
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GMPSharedMemManager::MgrDeallocShmem(GMPMemoryClasses aClass, ipc::Shmem& aMem)
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{
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CheckThread();
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size_t size = aMem.Size<uint8_t>();
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size_t total = 0;
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// XXX This works; there are better pool algorithms. We need to avoid
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// "falling off a cliff" with too low a number
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if (GetGmpFreelist(aClass).Length() > 10) {
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Dealloc(GetGmpFreelist(aClass)[0]);
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GetGmpFreelist(aClass).RemoveElementAt(0);
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// The allocation numbers will be fubar on the Child!
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sGmpAllocated[aClass]--;
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}
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for (uint32_t i = 0; i < GetGmpFreelist(aClass).Length(); i++) {
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MOZ_ASSERT(GetGmpFreelist(aClass)[i].IsWritable());
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total += GetGmpFreelist(aClass)[i].Size<uint8_t>();
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if (size < GetGmpFreelist(aClass)[i].Size<uint8_t>()) {
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GetGmpFreelist(aClass).InsertElementAt(i, aMem);
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return true;
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}
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}
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GetGmpFreelist(aClass).AppendElement(aMem);
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return true;
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}
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uint32_t
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GMPSharedMemManager::NumInUse(GMPMemoryClasses aClass)
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{
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return sGmpAllocated[aClass] - GetGmpFreelist(aClass).Length();
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}
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}
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}
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