使用pthread_join（）

Question

I am wondering, what can happen if we do a pthread_create without a pthread_join ?

Who will "clean" all the memory of the "non-joined" thread.

Answer 1

When the process terminates, all resources associated with the process cease to exist. (This of course does not include shared resources the process created, like files in the filesystem, shared memory segments, etc.) Until then, unjoined threads will continue to consume resources, potentially calling future calls to pthread_create or even malloc to fail.

Answer 2

If the thread is created without using pthread_join then when the main thread completes execution all other threads created in main function will be stopped and hence will not complete executing the whole statements in it.

Look at the documentation of Pthread_join .

It will make the main thread to suspend until the spawned thread completes execution.

Answer 3

好吧，假设它是不需要应用程序生命周期的线程，或者不需要尝试显式终止，则操作系统将在其进程终止时执行此操作（在所有非常规操作系统上）。