PTHREAD_JOIN(3) BSD Programmer's 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 un-
til 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() re-
turns 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() will fail if:
[EINVAL] The implementation has detected that 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.
[EDEADLK] A deadlock was detected or the value of thread specifies
the calling thread.
wait(2), pthread_create(3)
pthread_join() conforms to ISO/IEC 9945-1:1996 ("POSIX").
MirOS BSD #10-current April 4, 1996 1
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