pthreads的pthread_cleanup_push和pop函数

读apue的11.5节的代码11.5遇到问题，stackoverflow解答：

https://stackoverflow.com/questions/14421688/pthread-cleanup-pop-with-argument-0

 

did I get pthread_cleanup_pop wrong?

No, you didn't.

The reason your code executed cleanup handlers, is that your control never reaches pthread_cleanup_pop(0). Instead, you always execute return in thr_fn1, and pthread_exit in thr_fn2.

Try creating the threads with pthread_create(&tid1, NULL, thr_fn1, (void *)0); instead of 1. When I do that, I get (expected):

thread 1 start
thread 1 push complete
thread 2 start
thread 2 push complete
thread 1 exit code 1
thread 2 exit code 2