pthread_create() 创建线程，pthread_join()让线程一直运行下去。
链接时要加上-lpthread选项。
pthread_create中， 第三个参数为线程函数，定义如下：
void * heartbeat_thread()
{
...
}
下面是main.c :
#include <pthread.h>pthread_t thread[MAX_THREAD_NUM];
pthread_mutex_t cache_mutex;
pthread_mutex_t variable_mutex;
pthread_mutex_t time_mutex;
pthread_mutex_t msg_mutex;void thread_create(void)
{
int temp;
memset(thread, 0, sizeof(pthread_t) * MAX_THREAD_NUM);
if((temp = pthread_create(&thread[0], NULL, heartbeat_thread, NULL)) != 0)
printf("heartbeat thread create failed\n");
if((temp = pthread_create(&thread[1], NULL, timesync_thread, NULL)) != 0)
printf("tiemsync thread create failed\n");
if((temp = pthread_create(&thread[2], NULL, udpclient_thread, NULL)) != 0)
printf("udpclient thread create failed\n");
if((temp = pthread_create(&thread[3], NULL, udpserver_thread, NULL)) != 0)
printf("udpserver thread create failed\n");
if((temp = pthread_create(&thread[4], NULL, msgdisplay_thread, NULL)) != 0)
printf("msgdisplay thread create failed\n");
}void thread_wait(void)
{
if(thread[0] !=0)
{
pthread_join(thread[0],NULL);
printf("heartbeat thread finish\n");
}
if(thread[1] !=0)
{
pthread_join(thread[1],NULL);
printf("tiemsync thread finish\n");
}
if(thread[2] !=0)
{
pthread_join(thread[2],NULL);
printf("udpclient thread finish\n");
}
if(thread[3] !=0)
{
pthread_join(thread[3],NULL);
printf("udpserver thread finish\n");
}
if(thread[4] !=0)
{
pthread_join(thread[4],NULL);
printf("msgdisplay thread finish\n");
}
}int main(void)
{
pthread_mutex_init(&cache_mutex,NULL);
pthread_mutex_init(&variable_mutex,NULL);
pthread_mutex_init(&time_mutex,NULL);
pthread_mutex_init(&msg_mutex,NULL);thread_create();
thread_wait();pthread_mutex_destroy(&msg_mutex);
pthread_mutex_destroy(&time_mutex);
pthread_mutex_destroy(&variable_mutex);
pthread_mutex_destroy(&cache_mutex);
return 0;
}
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