0d7f18cddc
bump Dd, _exit was still dated 1996! yes, it has been modified a few times since then... MFC after: 1 week
108 lines
3.8 KiB
Groff
108 lines
3.8 KiB
Groff
.\" Copyright (c) 1996 John Birrell <jb@cimlogic.com.au>.
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed by John Birrell.
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.\" 4. Neither the name of the author nor the names of any co-contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd March 15, 2014
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.Dt PTHREAD_EXIT 3
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.Os
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.Sh NAME
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.Nm pthread_exit
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.Nd terminate the calling thread
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.Sh LIBRARY
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.Lb libpthread
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.Sh SYNOPSIS
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.In pthread.h
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.Ft void
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.Fn pthread_exit "void *value_ptr"
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.Sh DESCRIPTION
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The
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.Fn pthread_exit
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function terminates the calling thread and makes the value
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.Fa value_ptr
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available to any successful join with the terminating thread.
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Any
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cancellation cleanup handlers that have been pushed and are not yet popped
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are popped in the reverse order that they were pushed and then executed.
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After all cancellation handlers have been executed, if the thread has any
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thread-specific data, appropriate destructor functions are called in an
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unspecified order.
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Thread termination does not release any application
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visible process resources, including, but not limited to, mutexes and
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file descriptors, nor does it perform any process level cleanup
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actions, including, but not limited to, calling
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.Fn atexit
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routines that may exist.
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.Pp
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An implicit call to
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.Fn pthread_exit
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is made when a thread other than the thread in which
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.Fn main
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was first invoked returns from the start routine that was used to create
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it.
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The function's return value serves as the thread's exit status.
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.Pp
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The behavior of
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.Fn pthread_exit
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is undefined if called from a cancellation handler or destructor function
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that was invoked as the result of an implicit or explicit call to
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.Fn pthread_exit .
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.Pp
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After a thread has terminated, the result of access to local (auto)
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variables of the thread is undefined.
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Thus, references to local variables
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of the exiting thread should not be used for the
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.Fn pthread_exit
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.Fa value_ptr
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parameter value.
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.Pp
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The process will exit with an exit status of 0 after the last thread has
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been terminated.
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The behavior is as if the implementation called
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.Fn exit
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with a zero argument at thread termination time.
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.Sh RETURN VALUES
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The
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.Fn pthread_exit
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function cannot return to its caller.
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.Sh ERRORS
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None.
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.Sh SEE ALSO
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.Xr _exit 2 ,
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.Xr exit 3 ,
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.Xr pthread_cancel 3 ,
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.Xr pthread_create 3 ,
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.Xr pthread_join 3
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.Sh STANDARDS
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The
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.Fn pthread_exit
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function conforms to
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.St -p1003.1-96 .
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