mirror of
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128 lines
4.1 KiB
C++
128 lines
4.1 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set sw=2 ts=2 et 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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#include "CompositorChild.h"
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#include <stddef.h> // for size_t
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#include "Layers.h" // for LayerManager
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#include "base/message_loop.h" // for MessageLoop
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#include "base/process_util.h" // for OpenProcessHandle
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#include "base/task.h" // for NewRunnableMethod, etc
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#include "base/tracked.h" // for FROM_HERE
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#include "mozilla/layers/LayerTransactionChild.h"
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#include "mozilla/layers/PLayerTransactionChild.h"
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#include "mozilla/mozalloc.h" // for operator new, etc
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#include "nsDebug.h" // for NS_RUNTIMEABORT
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#include "nsIObserver.h" // for nsIObserver
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#include "nsTArray.h" // for nsTArray, nsTArray_Impl
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#include "nsTraceRefcnt.h" // for MOZ_COUNT_CTOR, etc
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#include "nsXULAppAPI.h" // for XRE_GetIOMessageLoop, etc
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using mozilla::layers::LayerTransactionChild;
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namespace mozilla {
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namespace layers {
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/*static*/ CompositorChild* CompositorChild::sCompositor;
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CompositorChild::CompositorChild(LayerManager *aLayerManager)
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: mLayerManager(aLayerManager)
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{
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MOZ_COUNT_CTOR(CompositorChild);
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}
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CompositorChild::~CompositorChild()
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{
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MOZ_COUNT_DTOR(CompositorChild);
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}
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void
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CompositorChild::Destroy()
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{
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mLayerManager->Destroy();
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mLayerManager = nullptr;
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while (size_t len = ManagedPLayerTransactionChild().Length()) {
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LayerTransactionChild* layers =
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static_cast<LayerTransactionChild*>(ManagedPLayerTransactionChild()[len - 1]);
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layers->Destroy();
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}
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SendStop();
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}
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/*static*/ PCompositorChild*
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CompositorChild::Create(Transport* aTransport, ProcessId aOtherProcess)
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{
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// There's only one compositor per child process.
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MOZ_ASSERT(!sCompositor);
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nsRefPtr<CompositorChild> child(new CompositorChild(nullptr));
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ProcessHandle handle;
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if (!base::OpenProcessHandle(aOtherProcess, &handle)) {
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// We can't go on without a compositor.
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NS_RUNTIMEABORT("Couldn't OpenProcessHandle() to parent process.");
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return nullptr;
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}
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if (!child->Open(aTransport, handle, XRE_GetIOMessageLoop(), ipc::ChildSide)) {
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NS_RUNTIMEABORT("Couldn't Open() Compositor channel.");
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return nullptr;
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}
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// We release this ref in ActorDestroy().
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return sCompositor = child.forget().get();
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}
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/*static*/ PCompositorChild*
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CompositorChild::Get()
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{
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// This is only expected to be used in child processes.
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MOZ_ASSERT(XRE_GetProcessType() != GeckoProcessType_Default);
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return sCompositor;
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}
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PLayerTransactionChild*
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CompositorChild::AllocPLayerTransactionChild(const nsTArray<LayersBackend>& aBackendHints,
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const uint64_t& aId,
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TextureFactoryIdentifier*,
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bool*)
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{
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return new LayerTransactionChild();
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}
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bool
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CompositorChild::DeallocPLayerTransactionChild(PLayerTransactionChild* actor)
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{
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delete actor;
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return true;
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}
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void
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CompositorChild::ActorDestroy(ActorDestroyReason aWhy)
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{
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MOZ_ASSERT(sCompositor == this);
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#ifdef MOZ_B2G
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// Due to poor lifetime management of gralloc (and possibly shmems) we will
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// crash at some point in the future when we get destroyed due to abnormal
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// shutdown. Its better just to crash here. On desktop though, we have a chance
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// of recovering.
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if (aWhy == AbnormalShutdown) {
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NS_RUNTIMEABORT("ActorDestroy by IPC channel failure at CompositorChild");
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}
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#endif
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sCompositor = nullptr;
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// We don't want to release the ref to sCompositor here, during
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// cleanup, because that will cause it to be deleted while it's
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// still being used. So defer the deletion to after it's not in
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// use.
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MessageLoop::current()->PostTask(
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FROM_HERE,
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NewRunnableMethod(this, &CompositorChild::Release));
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}
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} // namespace layers
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} // namespace mozilla
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