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PTHREAD_JOIN(3) BSD Library Functions Manual PTHREAD_JOIN(3)
pthread_join -- wait for thread termination
POSIX Threads Library (libpthread, -lpthread)
pthread_join(pthread_t thread, void **value_ptr);
The pthread_join() function suspends execution of the calling thread until the target thread
terminates unless the target thread has already terminated.
On return from a successful pthread_join() call with a non-NULL value_ptr argument, the
value passed to pthread_exit() by the terminating thread is stored in the location refer-
enced by value_ptr. When a pthread_join() returns successfully, the target thread has been
terminated. The results of multiple simultaneous calls to pthread_join() specifying the
same target thread are undefined. If the thread calling pthread_join() is cancelled, then
the target thread is not detached.
A thread that has exited but remains unjoined counts against _POSIX_THREAD_THREADS_MAX.
If successful, the pthread_join() function will return zero. Otherwise an error number
will be returned to indicate the error.
pthread_join() shall fail if:
[EINVAL] The value specified by thread does not refer to a joinable thread.
[ESRCH] No thread could be found corresponding to that specified by the given
thread ID, thread.
pthread_join() may fail if:
[EDEADLK] A deadlock was detected or the value of thread specifies the calling
The function conforms to IEEE Std 1003.1-2001 (``POSIX.1'').
BSD July 9, 2010 BSD
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