forked from rpms/glibc
33 lines
755 B
C
33 lines
755 B
C
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <errno.h>
|
|
#include <semaphore.h>
|
|
|
|
/* Semaphore variable structure. */
|
|
// taken from nptl/sysdeps/unix/sysv/linux/internaltypes.h
|
|
struct new_sem
|
|
{
|
|
unsigned int value;
|
|
int private;
|
|
unsigned long int nwaiters;
|
|
};
|
|
|
|
int main(void)
|
|
{
|
|
struct timespec ts = {0, -1}; // set incorrect nanoseconds
|
|
sem_t sem;
|
|
int ret = 0;
|
|
struct new_sem *isem = (struct new_sem *)&sem;
|
|
|
|
sem_init(&sem, 0, 0);
|
|
|
|
printf("before sem_timedwait(): new_sem->nwaiters = 0x%x\n", isem->nwaiters);
|
|
if (sem_timedwait(&sem, &ts) < 0)
|
|
printf("ERR: sem_timedwait() failed (errno=%d: %s)\n", errno, strerror(errno));
|
|
printf("after sem_timedwait(): new_sem->nwaiters = 0x%x\n", isem->nwaiters);
|
|
|
|
return (isem->nwaiters != 0);
|
|
}
|
|
|