108 lines
3.8 KiB
Groff
108 lines
3.8 KiB
Groff
.\" Copyright (c) 1996 John Birrell <jb@cimlogic.com.au>.
|
|
.\" All rights reserved.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
.\" 3. All advertising materials mentioning features or use of this software
|
|
.\" must display the following acknowledgement:
|
|
.\" This product includes software developed by John Birrell.
|
|
.\" 4. Neither the name of the author nor the names of any co-contributors
|
|
.\" may be used to endorse or promote products derived from this software
|
|
.\" without specific prior written permission.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND
|
|
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
.\" SUCH DAMAGE.
|
|
.\"
|
|
.\" $FreeBSD$
|
|
.\"
|
|
.Dd April 4, 1996
|
|
.Dt PTHREAD_EXIT 3
|
|
.Os
|
|
.Sh NAME
|
|
.Nm pthread_exit
|
|
.Nd terminate the calling thread
|
|
.Sh LIBRARY
|
|
.Lb libpthread
|
|
.Lb libthr
|
|
.Sh SYNOPSIS
|
|
.In pthread.h
|
|
.Ft void
|
|
.Fn pthread_exit "void *value_ptr"
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Fn pthread_exit
|
|
function terminates the calling thread and makes the value
|
|
.Fa 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
|
|
.Fn atexit
|
|
routines that may exist.
|
|
.Pp
|
|
An implicit call to
|
|
.Fn pthread_exit
|
|
is made when a thread other than the thread in which
|
|
.Fn 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.
|
|
.Pp
|
|
The behavior of
|
|
.Fn 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
|
|
.Fn pthread_exit .
|
|
.Pp
|
|
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
|
|
.Fn pthread_exit
|
|
.Fa value_ptr
|
|
parameter value.
|
|
.Pp
|
|
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
|
|
.Fn exit
|
|
with a zero argument at thread termination time.
|
|
.Sh RETURN VALUES
|
|
The
|
|
.Fn pthread_exit
|
|
function cannot return to its caller.
|
|
.Sh ERRORS
|
|
None.
|
|
.Sh SEE ALSO
|
|
.Xr _exit 2 ,
|
|
.Xr exit 3 ,
|
|
.Xr pthread_create 3 ,
|
|
.Xr pthread_join 3
|
|
.Sh STANDARDS
|
|
The
|
|
.Fn pthread_exit
|
|
function conforms to
|
|
.St -p1003.1-96 .
|