diff options
Diffstat (limited to 'src/thread/pthread_mutexattr_setrobust.c')
| -rw-r--r-- | src/thread/pthread_mutexattr_setrobust.c | 20 |
1 files changed, 9 insertions, 11 deletions
diff --git a/src/thread/pthread_mutexattr_setrobust.c b/src/thread/pthread_mutexattr_setrobust.c index 04db92a6..30a9ac3b 100644 --- a/src/thread/pthread_mutexattr_setrobust.c +++ b/src/thread/pthread_mutexattr_setrobust.c @@ -1,22 +1,20 @@ #include "pthread_impl.h" #include "syscall.h" -static pthread_once_t check_robust_once; -static int check_robust_result; - -static void check_robust() -{ - void *p; - size_t l; - check_robust_result = -__syscall(SYS_get_robust_list, 0, &p, &l); -} +static volatile int check_robust_result = -1; int pthread_mutexattr_setrobust(pthread_mutexattr_t *a, int robust) { if (robust > 1U) return EINVAL; if (robust) { - pthread_once(&check_robust_once, check_robust); - if (check_robust_result) return check_robust_result; + int r = check_robust_result; + if (r < 0) { + void *p; + size_t l; + r = -__syscall(SYS_get_robust_list, 0, &p, &l); + a_store(&check_robust_result, r); + } + if (r) return r; a->__attr |= 4; return 0; } |