#include <time.h>
#include <pthread.h>
#include <assert.h>
#include <errno.h>
int main()
{
struct timespec abstime;
pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
pthread_cond_t cond = PTHREAD_COND_INITIALIZER;
abstime.tv_sec = time(NULL) + 2;
abstime.tv_nsec = 0;
abstime.tv_nsec += 1000000000;
assert(pthread_mutex_lock(&mutex)==0);
assert(pthread_cond_timedwait(&cond, &mutex, &abstime)==EINVAL);
assert(pthread_mutex_unlock(&mutex)==0);
return 0;
}