1. Add function pthread_mutex_setspinloops_np to turn a mutex's spin

   loop count.
2. Add function pthread_mutex_setyieldloops_np to turn a mutex's yield
   loop count.
3. Make environment variables PTHREAD_SPINLOOPS and PTHREAD_YIELDLOOPS
   to be only used for turnning PTHREAD_MUTEX_ADAPTIVE_NP mutex.

1 files changed, 4 insertions, 0 deletions

diff --git a/include/pthread_np.h b/include/pthread_np.h
index d769de4ea174..fdd497030f89 100644
--- a/include/pthread_np.h
+++ b/include/pthread_np.h
@@ -49,6 +49,10 @@ int pthread_mutexattr_setkind_np(pthread_mutexattr_t *, int);
 void pthread_resume_all_np(void);
 int pthread_resume_np(pthread_t);
 void pthread_set_name_np(pthread_t, const char *);
+int pthread_mutex_getspinloops_np(pthread_mutex_t *mutex, int *count);
+int pthread_mutex_setspinloops_np(pthread_mutex_t *mutex, int count);
+int pthread_mutex_getyieldloops_np(pthread_mutex_t *mutex, int *count);
+int pthread_mutex_setyieldloops_np(pthread_mutex_t *mutex, int count);
 int pthread_single_np(void);
 void pthread_suspend_all_np(void);
 int pthread_suspend_np(pthread_t);