使用pthread_cond_timedwait把一个线程作为一个定时器使用.

#include <pthread.h>
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
void * Proc(void * arg)
{
pthread_cond_t cond;
pthread_mutex_t mutex;

pthread_mutex_init(&mutex,NULL);
pthread_cond_init(&cond,NULL);

timespec to;

int i = 0;
pthread_mutex_lock(&mutex);
to.tv_sec = time(NULL) + 3;
to.tv_nsec = 0;
while (i < 5)
{

int err = pthread_cond_timedwait(&cond, &mutex, &to);
if (err == ETIMEDOUT)
{
printf("time out %d: dispatch something.../n",i);
i++;
}

}

pthread_mutex_unlock(&mutex);

}
int main()
{
pthread_t pid;
int i=0;
printf("create thread.../n");
pthread_create(&pid,0,Proc,0);
pthread_join(pid,NULL);
sleep(1);
printf("Succeed exit!/n");
}