pthread_join(3) BSD Library Functions Manual pthread_join(3)
pthread_join -- wait for thread termination
#include <pthread.h> int 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 referenced 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 tar- get thread are undefined. If the thread calling pthread_join() is can- celled, then the target thread is not detached.
If successful, the pthread_join() function will return zero. Otherwise, an error number will be returned to indicate the error.
The pthread_join() function will fail if: [EINVAL] The implementation has detected that the value speci- fied by thread does not refer to a joinable thread. [ESRCH] No thread could be found corresponding to that speci- fied by the given thread ID, thread. [EDEADLK] A deadlock was detected or the value of thread speci- fies the calling thread.
The pthread_join() function conforms to ISO/IEC 9945-1:1996 (``POSIX.1''). BSD January 23, 2010 BSD
Mac OS X 10.12.3 - Generated Sun Feb 5 16:16:36 CST 2017