| // 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 unsigned int next(unsigned int n); |
| bool can_read() const; |
| bool can_write() const; |
| uv_cond_t read_cond_; |
| uv_cond_t write_cond_; |
| uv_mutex_t mutex_; |
| unsigned int read_off_; |
| unsigned int write_off_; |
| v8::Task* ring_[1024]; |
| }; |
| |
| class Platform : public v8::Platform { |
| public: |
| explicit Platform(unsigned int worker_count); |
| virtual ~Platform() override; |
| |
| void CallOnBackgroundThread(v8::Task* task, |
| ExpectedRuntime expected_runtime) override; |
| void CallOnForegroundThread(v8::Isolate* isolate, v8::Task* task) override; |
| double MonotonicallyIncreasingTime() override; |
| |
| 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_ |