Linux线程终止

void pthread_exit(void *rval_ptr);     // 退出线程，可通过参数向其它线程传递信息
int pthread_join(pthread_t thread, void **rvalptr);     // 阻塞等待指定线程退出，可获得线程退出时的信息

#include <stdio.h>
#include <pthread.h>
 
void *thr_fn1(void *arg)
{
    printf("thread 1 returning\n");
    return ((void *)1);
}
 
void *thr_fn2(void *arg)
{
    printf("thread 2 returning\n");
    pthread_exit((void *)2);
}
 
int main(void)
{
    pthread_t tid1, tid2;
    void *ret;
 
    pthread_create(&tid1, NULL, thr_fn1, NULL);
    pthread_create(&tid2, NULL, thr_fn2, NULL);
 
    pthread_join(tid1, &ret);  // 等待线程1退出
    printf("thread 1 exit code = %d\n", (int)ret);
     
    pthread_join(tid2, &ret);  // 等待线程2退出
    printf("thread 2 exit code = %d\n", (int)ret);
 
    return 0;
}

int pthread_cancel(pthread_t tid);     // 请求取消同一进程中的指定线程

pthread_exit(PTHREAD_CANCELED);

void pthread_cleanup_push(void (*rtn)(void *), void *arg);     // 注册清理函数
void pthread_cleanup_pop(int execute);     // 根据参数决定是否调用清理函数

#include <stdio.h>
#include <pthread.h>
 
// 线程清理处理程序
void cleanup(void *arg)
{
    printf("cleanup : %s\n", (char *)arg);
}
 
void *thr_fn1(void *arg)
{
    pthread_cleanup_push(cleanup, "This is thread 1\n");
    return ((void *)1);       // 返回不会调用清理函数
    pthread_cleanup_pop(0); // 配对作用
}
 
void *thr_fn2(void *arg)
{
    pthread_cleanup_push(cleanup, "This is thread 2\n");
    pthread_exit((void *)2);   // exit时会调用清理函数
    pthread_cleanup_pop(0);     // 配对作用
}
 
void *thr_fn3(void *arg)
{
    pthread_cleanup_push(cleanup, "This is thread 3\n");
    sleep(3);               // 等待控制线程发出取消请求，然后调用清理函数
    pthread_cleanup_pop(0); // 配对作用
}
 
void *thr_fn4(void *arg)
{
    pthread_cleanup_push(cleanup, "This is thread 4\n");
    pthread_cleanup_pop(1); // 参数为0，则清理函数不被调用
}
 
int main(void)
{
    pthread_t tid1, tid2, tid3, tid4;
 
    pthread_create(&tid1, NULL, thr_fn1, NULL);
    pthread_create(&tid2, NULL, thr_fn2, NULL);
    pthread_create(&tid3, NULL, thr_fn3, NULL);
    pthread_create(&tid4, NULL, thr_fn4, NULL);
 
    pthread_cancel(tid3);
 
    sleep(3);
 
    return 0;
}