| 1 | #ifndef BENCHMARK_THREAD_MANAGER_H |
|---|---|
| 2 | #define BENCHMARK_THREAD_MANAGER_H |
| 3 | |
| 4 | #include <atomic> |
| 5 | |
| 6 | #include "benchmark/benchmark.h" |
| 7 | #include "mutex.h" |
| 8 | |
| 9 | namespace benchmark { |
| 10 | namespace internal { |
| 11 | |
| 12 | class ThreadManager { |
| 13 | public: |
| 14 | explicit ThreadManager(int num_threads) |
| 15 | : alive_threads_(num_threads), start_stop_barrier_(num_threads) {} |
| 16 | |
| 17 | Mutex& GetBenchmarkMutex() const RETURN_CAPABILITY(benchmark_mutex_) { |
| 18 | return benchmark_mutex_; |
| 19 | } |
| 20 | |
| 21 | bool StartStopBarrier() EXCLUDES(end_cond_mutex_) { |
| 22 | return start_stop_barrier_.wait(); |
| 23 | } |
| 24 | |
| 25 | void NotifyThreadComplete() EXCLUDES(end_cond_mutex_) { |
| 26 | start_stop_barrier_.removeThread(); |
| 27 | if (--alive_threads_ == 0) { |
| 28 | MutexLock lock(end_cond_mutex_); |
| 29 | end_condition_.notify_all(); |
| 30 | } |
| 31 | } |
| 32 | |
| 33 | void WaitForAllThreads() EXCLUDES(end_cond_mutex_) { |
| 34 | MutexLock lock(end_cond_mutex_); |
| 35 | end_condition_.wait(lock&: lock.native_handle(), |
| 36 | p: [this]() { return alive_threads_ == 0; }); |
| 37 | } |
| 38 | |
| 39 | struct Result { |
| 40 | IterationCount iterations = 0; |
| 41 | double real_time_used = 0; |
| 42 | double cpu_time_used = 0; |
| 43 | double manual_time_used = 0; |
| 44 | int64_t complexity_n = 0; |
| 45 | std::string report_label_; |
| 46 | std::string skip_message_; |
| 47 | internal::Skipped skipped_ = internal::NotSkipped; |
| 48 | UserCounters counters; |
| 49 | }; |
| 50 | GUARDED_BY(GetBenchmarkMutex()) Result results; |
| 51 | |
| 52 | private: |
| 53 | mutable Mutex benchmark_mutex_; |
| 54 | std::atomic<int> alive_threads_; |
| 55 | Barrier start_stop_barrier_; |
| 56 | Mutex end_cond_mutex_; |
| 57 | Condition end_condition_; |
| 58 | }; |
| 59 | |
| 60 | } // namespace internal |
| 61 | } // namespace benchmark |
| 62 | |
| 63 | #endif // BENCHMARK_THREAD_MANAGER_H |
| 64 |