#include <semaphore.h> #include <stdio.h> #include <unistd.h> #include <pthread.h> #include <internaltypes.h> #ifndef SEM_WAIT # define SEM_WAIT(s) sem_wait (s) #endif static void * tf (void *arg) { #ifdef PREPARE PREPARE #endif SEM_WAIT (arg); return NULL; } int main (void) { int tries = 5; pthread_t th; sem_t s; again: if (sem_init (&s, 0, 0) != 0) { puts ("sem_init failed"); return 1; } struct new_sem *is = (struct new_sem *) &s; if (is->nwaiters != 0) { puts ("nwaiters not initialized"); return 1; } if (pthread_create (&th, NULL, tf, &s) != 0) { puts ("pthread_create failed"); return 1; } sleep (1); if (pthread_cancel (th) != 0) { puts ("pthread_cancel failed"); return 1; } void *r; if (pthread_join (th, &r) != 0) { puts ("pthread_join failed"); return 1; } if (r != PTHREAD_CANCELED && --tries > 0) { /* Maybe we get the scheduling right the next time. */ sem_destroy (&s); goto again; } if (is->nwaiters != 0) { puts ("nwaiters not reset"); return 1; } return 0; }