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1946924b16
Currently we run some tasks on the UI thread that shouldn't block the frame, such as decoding images. This patch introduces a background thread on which we can run these tasks.
102 lines
2.9 KiB
C++
102 lines
2.9 KiB
C++
// Copyright 2015 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "sky/shell/shell.h"
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#include <memory>
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#include "base/bind.h"
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#include "base/i18n/icu_util.h"
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#include "base/lazy_instance.h"
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#include "base/memory/discardable_memory.h"
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#include "base/memory/discardable_memory_allocator.h"
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#include "base/single_thread_task_runner.h"
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#include "mojo/message_pump/message_pump_mojo.h"
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#include "mojo/edk/embedder/embedder.h"
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#include "mojo/edk/embedder/simple_platform_support.h"
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#include "sky/shell/ui/engine.h"
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#include "ui/gl/gl_surface.h"
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namespace sky {
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namespace shell {
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namespace {
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static Shell* g_shell = nullptr;
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scoped_ptr<base::MessagePump> CreateMessagePumpMojo() {
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return make_scoped_ptr(new mojo::common::MessagePumpMojo);
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}
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class NonDiscardableMemory : public base::DiscardableMemory {
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public:
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explicit NonDiscardableMemory(size_t size) : data_(new uint8_t[size]) {}
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bool Lock() override { return false; }
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void Unlock() override {}
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void* data() const override { return data_.get(); }
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private:
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scoped_ptr<uint8_t[]> data_;
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};
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class NonDiscardableMemoryAllocator : public base::DiscardableMemoryAllocator {
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public:
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scoped_ptr<base::DiscardableMemory> AllocateLockedDiscardableMemory(
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size_t size) override {
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return make_scoped_ptr(new NonDiscardableMemory(size));
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}
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};
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base::LazyInstance<NonDiscardableMemoryAllocator> g_discardable;
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} // namespace
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Shell::Shell(scoped_ptr<ServiceProviderContext> service_provider_context)
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: service_provider_context_(service_provider_context.Pass()) {
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DCHECK(!g_shell);
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mojo::embedder::Init(std::unique_ptr<mojo::embedder::PlatformSupport>(
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new mojo::embedder::SimplePlatformSupport()));
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base::Thread::Options options;
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options.message_pump_factory = base::Bind(&CreateMessagePumpMojo);
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gpu_thread_.reset(new base::Thread("gpu_thread"));
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gpu_thread_->StartWithOptions(options);
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gpu_task_runner_ = gpu_thread_->message_loop()->task_runner();
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ui_thread_.reset(new base::Thread("ui_thread"));
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ui_thread_->StartWithOptions(options);
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ui_task_runner_ = ui_thread_->message_loop()->task_runner();
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io_thread_.reset(new base::Thread("io_thread"));
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io_thread_->StartWithOptions(options);
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io_task_runner_ = io_thread_->message_loop()->task_runner();
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ui_task_runner()->PostTask(FROM_HERE, base::Bind(&Engine::Init));
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}
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Shell::~Shell() {
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}
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void Shell::Init(scoped_ptr<ServiceProviderContext> service_provider_context) {
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CHECK(base::i18n::InitializeICU());
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#if !defined(OS_LINUX)
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CHECK(gfx::GLSurface::InitializeOneOff());
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#endif
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base::DiscardableMemoryAllocator::SetInstance(&g_discardable.Get());
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g_shell = new Shell(service_provider_context.Pass());
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}
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Shell& Shell::Shared() {
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DCHECK(g_shell);
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return *g_shell;
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}
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TracingController& Shell::tracing_controller() {
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return tracing_controller_;
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}
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} // namespace shell
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} // namespace sky
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