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#ifndef SRC_NODE_PLATFORM_H_
#define SRC_NODE_PLATFORM_H_
#include <queue>
#include <vector>
#include "libplatform/libplatform.h"
#include "node_mutex.h"
#include "uv.h"
namespace node {
template <class T>
class TaskQueue {
public:
TaskQueue();
~TaskQueue() {}
void Push(T* task);
T* Pop();
T* BlockingPop();
void NotifyOfCompletion();
void BlockingDrain();
void Stop();
private:
Mutex lock_;
ConditionVariable tasks_available_;
ConditionVariable tasks_drained_;
int outstanding_tasks_;
bool stopped_;
std::queue<T*> task_queue_;
};
class NodePlatform : public v8::Platform {
public:
NodePlatform(int thread_pool_size, uv_loop_t* loop,
v8::TracingController* tracing_controller);
virtual ~NodePlatform() {}
void DrainBackgroundTasks();
// Returns true iff work was dispatched or executed.
bool FlushForegroundTasksInternal();
void Shutdown();
// v8::Platform implementation.
size_t NumberOfAvailableBackgroundThreads() override;
void CallOnBackgroundThread(v8::Task* task,
ExpectedRuntime expected_runtime) override;
void CallOnForegroundThread(v8::Isolate* isolate, v8::Task* task) override;
void CallDelayedOnForegroundThread(v8::Isolate* isolate, v8::Task* task,
double delay_in_seconds) override;
bool IdleTasksEnabled(v8::Isolate* isolate) override;
double MonotonicallyIncreasingTime() override;
v8::TracingController* GetTracingController() override;
private:
uv_loop_t* const loop_;
uv_async_t flush_tasks_;
TaskQueue<v8::Task> foreground_tasks_;
TaskQueue<std::pair<v8::Task*, double>> foreground_delayed_tasks_;
TaskQueue<v8::Task> background_tasks_;
std::vector<std::unique_ptr<uv_thread_t>> threads_;
std::unique_ptr<v8::TracingController> tracing_controller_;
};
} // namespace node
#endif // SRC_NODE_PLATFORM_H_
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