[unix]pthread_cleanup_push & pthread_cleanup_pop 实例

#include "apue.h"
#include 

void cleanup(void *arg)
{
    printf("cleanup: %s\n", (char *)arg);
}

void * thr_fn1(void *arg)
{
    printf("thread 1 start\n");
    pthread_cleanup_push(cleanup,(void *)"thread 1 first handler");
    pthread_cleanup_push(cleanup,(void *)"thread 1 second handler");
    printf("thread 1 push complete\n");
    if(arg)
        return((void *)1);
    pthread_cleanup_pop(0);
    pthread_cleanup_pop(0);
    return((void *)1);

}

void * thr_fn2(void *arg)
{
    printf("thread 2 start\n");
    pthread_cleanup_push(cleanup,(void *)"thread 2 first handler");
    pthread_cleanup_push(cleanup,(void *)"thread 2 second handler");
    printf("thread 2 push complete\n");
    if(arg)
        return((void *)2);
    pthread_cleanup_pop(0);
    pthread_cleanup_pop(0);
    return((void *)2);
}

int main(int argc,char **argv)
{
    int err;
    pthread_t tid1,tid2;
    void *tret;
    err = pthread_create(&tid1,NULL,thr_fn1,(void *)1);
    if(err != 0)
        err_exit(err,"can't create thread 1");

    err = pthread_create(&tid2,NULL,thr_fn2,(void *)1);
    if(err != 0)
        err_exit(err,"can't create thread 2");


    err = pthread_join(tid1,&tret);
    if(err != 0)
        err_exit(err, "can't join with thread 1");
    printf("thread 1 exit code %ld\n",(long)tret);

    err = pthread_join(tid2,&tret);
    if(err != 0)
        err_exit(err, "can't join with thread 2");
    printf("thread 2 exit code %ld\n",(long)tret);

    exit(0);

}

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