diff options
Diffstat (limited to 'nptl/threads.h')
| -rw-r--r-- | nptl/threads.h | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/nptl/threads.h b/nptl/threads.h index 5258e23919..13d0075ea9 100644 --- a/nptl/threads.h +++ b/nptl/threads.h @@ -24,6 +24,7 @@ __BEGIN_DECLS +#include <bits/pthreadtypes-arch.h> #include <bits/types/struct_timespec.h> typedef unsigned long int thrd_t; @@ -39,6 +40,20 @@ enum thrd_timedout = 4 }; +/* Mutex types. */ +enum +{ + mtx_plain = 0, + mtx_recursive = 1, + mtx_timed = 2 +}; + +typedef union +{ + char __size[__SIZEOF_PTHREAD_MUTEX_T]; + long int __align __LOCK_ALIGNMENT; +} mtx_t; + /* Threads functions. */ /* Create a new thread executing the function __FUNC. Arguments for __FUNC @@ -85,6 +100,35 @@ thrd_equal (thrd_t __thread1, thrd_t __thread2) } #endif + +/* Mutex functions. */ + +/* Creates a new mutex object with type __TYPE. If successful the new + object is pointed by __MUTEX. */ +extern int mtx_init (mtx_t *__mutex, int __type); + +/* Block the current thread until the mutex pointed to by __MUTEX is + unlocked. In that case current thread will not be blocked. */ +extern int mtx_lock (mtx_t *__mutex); + +/* Block the current thread until the mutex pointed by __MUTEX is unlocked + or time pointed by __TIME_POINT is reached. In case the mutex is unlock, + the current thread will not be blocked. */ +extern int mtx_timedlock (mtx_t *__restrict __mutex, + const struct timespec *__restrict __time_point); + +/* Try to lock the mutex pointed by __MUTEX without blocking. If the mutex + is free the current threads takes control of it, otherwise it returns + immediately. */ +extern int mtx_trylock (mtx_t *__mutex); + +/* Unlock the mutex pointed by __MUTEX. It may potentially awake other + threads waiting on this mutex. */ +extern int mtx_unlock (mtx_t *__mutex); + +/* Destroy the mutex object pointed by __MUTEX. */ +extern void mtx_destroy (mtx_t *__mutex); + __END_DECLS #endif /* _THREADS_H */ |