| // Copyright 2013 the V8 project authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef V8_LIBPLATFORM_DEFAULT_PLATFORM_H_ |
| #define V8_LIBPLATFORM_DEFAULT_PLATFORM_H_ |
| |
| #include <functional> |
| #include <map> |
| #include <memory> |
| #include <queue> |
| #include <vector> |
| |
| #include "include/libplatform/libplatform-export.h" |
| #include "include/libplatform/libplatform.h" |
| #include "include/libplatform/v8-tracing.h" |
| #include "include/v8-platform.h" |
| #include "src/base/compiler-specific.h" |
| #include "src/base/macros.h" |
| #include "src/base/platform/mutex.h" |
| #include "src/libplatform/task-queue.h" |
| |
| namespace v8 { |
| namespace platform { |
| |
| class TaskQueue; |
| class Thread; |
| class WorkerThread; |
| |
| class V8_PLATFORM_EXPORT DefaultPlatform : public NON_EXPORTED_BASE(Platform) { |
| public: |
| explicit DefaultPlatform( |
| IdleTaskSupport idle_task_support = IdleTaskSupport::kDisabled, |
| v8::TracingController* tracing_controller = nullptr); |
| virtual ~DefaultPlatform(); |
| |
| void SetThreadPoolSize(int thread_pool_size); |
| |
| void EnsureInitialized(); |
| |
| bool PumpMessageLoop( |
| v8::Isolate* isolate, |
| MessageLoopBehavior behavior = MessageLoopBehavior::kDoNotWait); |
| void EnsureEventLoopInitialized(v8::Isolate* isolate); |
| |
| void RunIdleTasks(v8::Isolate* isolate, double idle_time_in_seconds); |
| |
| void SetTracingController(v8::TracingController* tracing_controller); |
| |
| // v8::Platform implementation. |
| size_t NumberOfAvailableBackgroundThreads() override; |
| void CallOnBackgroundThread(Task* task, |
| ExpectedRuntime expected_runtime) override; |
| void CallOnForegroundThread(v8::Isolate* isolate, Task* task) override; |
| void CallDelayedOnForegroundThread(Isolate* isolate, Task* task, |
| double delay_in_seconds) override; |
| void CallIdleOnForegroundThread(Isolate* isolate, IdleTask* task) override; |
| bool IdleTasksEnabled(Isolate* isolate) override; |
| double MonotonicallyIncreasingTime() override; |
| double CurrentClockTimeMillis() override; |
| v8::TracingController* GetTracingController() override; |
| StackTracePrinter GetStackTracePrinter() override; |
| |
| private: |
| static const int kMaxThreadPoolSize; |
| |
| Task* PopTaskInMainThreadQueue(v8::Isolate* isolate); |
| Task* PopTaskInMainThreadDelayedQueue(v8::Isolate* isolate); |
| IdleTask* PopTaskInMainThreadIdleQueue(v8::Isolate* isolate); |
| |
| void WaitForForegroundWork(v8::Isolate* isolate); |
| void ScheduleOnForegroundThread(v8::Isolate* isolate, Task* task); |
| |
| base::Mutex lock_; |
| bool initialized_; |
| int thread_pool_size_; |
| IdleTaskSupport idle_task_support_; |
| std::vector<WorkerThread*> thread_pool_; |
| TaskQueue queue_; |
| std::map<v8::Isolate*, std::queue<Task*>> main_thread_queue_; |
| std::map<v8::Isolate*, std::queue<IdleTask*>> main_thread_idle_queue_; |
| std::map<v8::Isolate*, std::unique_ptr<base::Semaphore>> event_loop_control_; |
| |
| typedef std::pair<double, Task*> DelayedEntry; |
| std::map<v8::Isolate*, |
| std::priority_queue<DelayedEntry, std::vector<DelayedEntry>, |
| std::greater<DelayedEntry> > > |
| main_thread_delayed_queue_; |
| std::unique_ptr<TracingController> tracing_controller_; |
| |
| DISALLOW_COPY_AND_ASSIGN(DefaultPlatform); |
| }; |
| |
| |
| } // namespace platform |
| } // namespace v8 |
| |
| |
| #endif // V8_LIBPLATFORM_DEFAULT_PLATFORM_H_ |