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download PDF document: pthread_exit.3.pdf

PTHREAD_EXIT(3) FreeBSD Library Functions Manual PTHREAD_EXIT(3)
NAME pthread_exit - terminate the calling thread
LIBRARY POSIX Threads Library (libpthread, -lpthread)
SYNOPSIS #include <pthread.h>
void pthread_exit(void *value_ptr);
DESCRIPTION The pthread_exit() function terminates the calling thread and makes the value value_ptr available to any successful join with the terminating thread. Any cancellation cleanup handlers that have been pushed and are not yet popped are popped in the reverse order that they were pushed and then executed. After all cancellation handlers have been executed, if the thread has any thread-specific data, appropriate destructor functions are called in an unspecified order. Thread termination does not release any application visible process resources, including, but not limited to, mutexes and file descriptors, nor does it perform any process level cleanup actions, including, but not limited to, calling atexit() routines that may exist.
An implicit call to pthread_exit() is made when a thread other than the thread in which main() was first invoked returns from the start routine that was used to create it. The function's return value serves as the thread's exit status.
The behavior of pthread_exit() is undefined if called from a cancellation handler or destructor function that was invoked as the result of an implicit or explicit call to pthread_exit().
After a thread has terminated, the result of access to local (auto) variables of the thread is undefined. Thus, references to local variables of the exiting thread should not be used for the pthread_exit() value_ptr parameter value.
The process will exit with an exit status of 0 after the last thread has been terminated. The behavior is as if the implementation called exit() with a zero argument at thread termination time.
RETURN VALUES The pthread_exit() function cannot return to its caller.
ERRORS None.
SEE ALSO _exit(2), exit(3), pthread_cancel(3), pthread_create(3), pthread_join(3)
STANDARDS The pthread_exit() function conforms to ISO/IEC 9945-1:1996 ("POSIX.1").
FreeBSD 14.0-RELEASE-p11 March 15, 2014 FreeBSD 14.0-RELEASE-p11