github.com/afumu/libc@v0.0.6/musl/src/thread/pthread_mutexattr_setrobust.c (about) 1 #include "pthread_impl.h" 2 #include "syscall.h" 3 4 static pthread_once_t check_robust_once; 5 static int check_robust_result; 6 7 static void check_robust() 8 { 9 void *p; 10 size_t l; 11 check_robust_result = -__syscall(SYS_get_robust_list, 0, &p, &l); 12 } 13 14 int pthread_mutexattr_setrobust(pthread_mutexattr_t *a, int robust) 15 { 16 if (robust > 1U) return EINVAL; 17 if (robust) { 18 pthread_once(&check_robust_once, check_robust); 19 if (check_robust_result) return check_robust_result; 20 a->__attr |= 4; 21 return 0; 22 } 23 a->__attr &= ~4; 24 return 0; 25 }