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// Copyright Fedor Indutny and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.
#ifndef SRC_NODE_V8_PLATFORM_H_
#define SRC_NODE_V8_PLATFORM_H_
#include "uv.h"
#include "v8-platform.h"
namespace node {
class TaskQueue {
public:
TaskQueue();
~TaskQueue();
void Push(v8::Task* task);
v8::Task* Shift();
private:
static const unsigned int kRingSize = 1024;
uv_sem_t sem_;
uv_cond_t cond_;
uv_mutex_t mutex_;
v8::Task** ring_;
unsigned int size_;
unsigned int mask_;
unsigned int read_off_;
unsigned int write_off_;
};
class Platform : public v8::Platform {
public:
explicit Platform(unsigned int worker_count);
~Platform();
void CallOnBackgroundThread(v8::Task* task,
ExpectedRuntime expected_runtime);
void CallOnForegroundThread(v8::Isolate* isolate, v8::Task* task);
protected:
static void WorkerBody(void* arg);
inline TaskQueue* global_queue() { return &global_queue_; }
inline uv_thread_t* worker_at(unsigned int index) { return &workers_[index]; }
inline unsigned int worker_count() const { return worker_count_; }
uv_thread_t* workers_;
unsigned int worker_count_;
TaskQueue global_queue_;
};
} // namespace node
#endif // SRC_NODE_V8_PLATFORM_H_
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