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PTHREAD_JOIN(3) FreeBSD Library Functions Manual PTHREAD_JOIN(3) NAME pthread_join - wait for thread termination LIBRARY POSIX Threads Library (libpthread, -lpthread) SYNOPSIS #include <pthread.h> int pthread_join(pthread_t thread, void **value_ptr); DESCRIPTION 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 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. RETURN VALUES If successful, the pthread_join() function will return zero. Otherwise an error number will be returned to indicate the error. ERRORS 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 thread. SEE ALSO wait(2), pthread_create(3) STANDARDS The function conforms to IEEE Std 1003.1-2001 ("POSIX.1"). FreeBSD 14.1-RELEASE-p8 July 9, 2010 FreeBSD 14.1-RELEASE-p8