pthread_create和EAGAIN [英] pthread_create and EAGAIN

问题描述

当尝试使用pthread_create生成线程时，我得到了一个EAGAIN.但是，从我检查的结果来看，线程似乎已正确终止.

I got an EAGAIN when trying to spawn a thread using pthread_create. However, from what I've checked, the threads seem to have been terminated properly.

当尝试使用pthread_create创建线程时，由什么决定操作系统赋予EAGAIN?

What determines the OS to give EAGAIN when trying to create a thread using pthread_create? Would it be possible that unclosed sockets/file handles play a part in causing this EAGAIN (i.e they share the same resource space)?

最后，是否有任何工具可以检查资源使用情况，或者可以使用任何函数查看当时有多少个pthread对象处于活动状态?

And lastly, is there any tool to check resource usage, or any functions that can be used to see how many pthread objects are active at the time?

推荐答案

好的，找到答案了.即使调用了pthread_exit或pthread_cancel，父进程仍需要调用pthread_join来释放pthread ID，然后该ID将变为可回收的.

Okay, found the answer. Even if pthread_exit or pthread_cancel is called, the parent process still need to call pthread_join to release the pthread ID, which will then become recyclable.

最后放一个pthread_join(tid，NULL)可以解决问题.

Putting a pthread_join(tid, NULL) in the end did the trick.

编辑(不是waitpid，而是pthread_join)

edit (was not waitpid, but rather pthread_join)

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