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Diffstat (limited to 'tensorflow/stream_executor/platform/default')
-rw-r--r-- | tensorflow/stream_executor/platform/default/mutex.h | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/tensorflow/stream_executor/platform/default/mutex.h b/tensorflow/stream_executor/platform/default/mutex.h new file mode 100644 index 0000000000..371eb7f156 --- /dev/null +++ b/tensorflow/stream_executor/platform/default/mutex.h @@ -0,0 +1,60 @@ +#ifndef TENSORFLOW_STREAM_EXECUTOR_PLATFORM_DEFAULT_MUTEX_H_ +#define TENSORFLOW_STREAM_EXECUTOR_PLATFORM_DEFAULT_MUTEX_H_ + +#include <chrono> // NOLINT +#include <condition_variable> // NOLINT + +#include "tensorflow/stream_executor/platform/port.h" + +// std::shared_timed_mutex is a C++14 feature. +#if (__cplusplus >= 201402L) +#define STREAM_EXECUTOR_USE_SHARED_MUTEX +#endif // __cplusplus >= 201402L + +#ifdef STREAM_EXECUTOR_USE_SHARED_MUTEX +#include <shared_mutex> // NOLINT +#else +#include <mutex> // NOLINT +#endif + +namespace perftools { +namespace gputools { + +enum ConditionResult { kCond_Timeout, kCond_MaybeNotified }; + +#ifdef STREAM_EXECUTOR_USE_SHARED_MUTEX +typedef std::shared_timed_mutex BaseMutex; +#else +typedef std::mutex BaseMutex; +#endif + +// A class that wraps around the std::mutex implementation, only adding an +// additional LinkerInitialized constructor interface. +class mutex : public BaseMutex { + public: + mutex() {} + // The default implementation of std::mutex is safe to use after the linker + // initializations + explicit mutex(LinkerInitialized x) {} +}; + +typedef std::unique_lock<BaseMutex> mutex_lock; + +#ifdef STREAM_EXECUTOR_USE_SHARED_MUTEX +typedef std::shared_lock<BaseMutex> shared_lock; +#else +typedef std::unique_lock<BaseMutex> shared_lock; +#endif + +using std::condition_variable; + +inline ConditionResult WaitForMilliseconds(mutex_lock* mu, + condition_variable* cv, int64 ms) { + std::cv_status s = cv->wait_for(*mu, std::chrono::milliseconds(ms)); + return (s == std::cv_status::timeout) ? kCond_Timeout : kCond_MaybeNotified; +} + +} // namespace gputools +} // namespace perftools + +#endif // TENSORFLOW_STREAM_EXECUTOR_PLATFORM_DEFAULT_MUTEX_H_ |