PTHREAD_EXIT(3C) Standard C Library Functions PTHREAD_EXIT(3C)

NAME

pthread_exit - terminate calling thread

SYNOPSIS

cc -mt [ flag... ] file... -lpthread [ library... ]
#include <pthread.h>

void pthread_exit(void *value_ptr);

DESCRIPTION

The pthread_exit() function terminates the calling thread, in a similar
way that exit(3C) terminates the calling process. If the thread is not
detached, the exit status specified by value_ptr is made available to
any successful join with the terminating thread. See pthread_join(3C).
Any cancellation cleanup handlers that have been pushed and not yet
popped are popped in the reverse order that they were pushed and then
executed. After all cancellation cleanup handlers have been executed, if
the thread has any thread-specific data, appropriate destructor functions
will be 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 any
atexit() routines that might exist.


An exiting thread runs with all signals blocked. All thread termination
functions, including cancellation cleanup handlers and thread-specific
data destructor functions, are called with all signals blocked.


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
cleanup handler or destructor function that was invoked as a result of
either 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 exits with an exit status of 0 after the last thread has
been terminated. The behavior is as if the implementation called exit()
with a 0 argument at thread termination time.

RETURN VALUES

The pthread_exit() function cannot return to its caller.

ERRORS

No errors are defined.

ATTRIBUTES

See attributes(7) for descriptions of the following attributes:


+--------------------+-------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+--------------------+-------------------+
|Interface Stability | Committed |
+--------------------+-------------------+
|MT-Level | MT-Safe |
+--------------------+-------------------+
|Standard | See standards(7). |
+--------------------+-------------------+

SEE ALSO

exit(3C), pthread_cancel(3C), pthread_create(3C), pthread_join(3C),
pthread_key_create(3C), attributes(7), standards(7)

November 2, 2007 PTHREAD_EXIT(3C)