diff options
Diffstat (limited to 'mysys/my_thr_init.c')
| -rw-r--r-- | mysys/my_thr_init.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/mysys/my_thr_init.c b/mysys/my_thr_init.c index 252ad9f203e..716552bc31b 100644 --- a/mysys/my_thr_init.c +++ b/mysys/my_thr_init.c @@ -59,6 +59,38 @@ nptl_pthread_exit_hack_handler(void *arg __attribute((unused))) #endif /* TARGET_OS_LINUX */ + +/** + Initialize thread attributes. +*/ + +void my_threadattr_global_init(void) +{ +#ifdef PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP + /* + Set mutex type to "fast" a.k.a "adaptive" + + In this case the thread may steal the mutex from some other thread + that is waiting for the same mutex. This will save us some + context switches but may cause a thread to 'starve forever' while + waiting for the mutex (not likely if the code within the mutex is + short). + */ + pthread_mutexattr_init(&my_fast_mutexattr); /* ?= MY_MUTEX_INIT_FAST */ + pthread_mutexattr_settype(&my_fast_mutexattr, + PTHREAD_MUTEX_ADAPTIVE_NP); +#endif +#ifdef PTHREAD_ERRORCHECK_MUTEX_INITIALIZER_NP + /* + Set mutex type to "errorcheck" + */ + pthread_mutexattr_init(&my_errorcheck_mutexattr); + pthread_mutexattr_settype(&my_errorcheck_mutexattr, + PTHREAD_MUTEX_ERRORCHECK); +#endif +} + + static uint get_thread_lib(void); /* |