pthread_exit.c

/*
 * pthread_exit.c
 *
 * Description:
 * This translation unit implements routines associated with exiting from
 * a thread.
 *
 * --------------------------------------------------------------------------
 *
 *      pthreads-win32 - POSIX Threads Library for Win32
 *      Copyright(C) 1998 John E. Bossom
 *      Copyright(C) 1999-2021 pthreads-win32 / pthreads4w contributors
 *
 *      Homepage1: http://sourceware.org/pthreads-win32/
 *      Homepage2: http://sourceforge.net/projects/pthreads4w/
 *
 *      The current list of contributors is contained
 *      in the file CONTRIBUTORS included with the source
 *      code distribution. The list can also be seen at the
 *      following World Wide Web location:
 *      http://sources.redhat.com/pthreads-win32/contributors.html
 * 
 *      This library is free software; you can redistribute it and/or
 *      modify it under the terms of the GNU Lesser General Public
 *      License as published by the Free Software Foundation; either
 *      version 2 of the License, or (at your option) any later version.
 * 
 *      This library is distributed in the hope that it will be useful,
 *      but WITHOUT ANY WARRANTY; without even the implied warranty of
 *      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *      Lesser General Public License for more details.
 * 
 *      You should have received a copy of the GNU Lesser General Public
 *      License along with this library in the file COPYING.LIB;
 *      if not, write to the Free Software Foundation, Inc.,
 *      59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
 *
 * --------------------------------------------------------------------------
 */

#ifdef HAVE_CONFIG_H
# include "config.h"
#endif

#include "pthread.h"
#include "implement.h"
#if !defined(_UWIN)
/*#   include <process.h> */
#endif

void
pthread_exit (void *value_ptr)
     /*
      * ------------------------------------------------------
      * DOCPUBLIC
      *      This function terminates the calling thread, returning
      *      the value 'value_ptr' to any joining thread.
      *
      * PARAMETERS
      *      value_ptr
      *              a generic data value (i.e. not the address of a value)
      *
      *
      * DESCRIPTION
      *      This function terminates the calling thread, returning
      *      the value 'value_ptr' to any joining thread.
      *      NOTE: thread should be joinable.
      *
      * RESULTS
      *              N/A
      *
      * ------------------------------------------------------
      */
{
  ptw32_thread_t * sp;

  /*
   * Don't use pthread_self() to avoid creating an implicit POSIX thread handle
   * unnecessarily.
   */
  sp = (ptw32_thread_t *) pthread_getspecific (ptw32_selfThreadKey);

#if defined(_UWIN)
  if (--pthread_count <= 0)
    exit ((int) value_ptr);
#endif

  if (NULL == sp)
    {
      /*
       * A POSIX thread handle was never created. I.e. this is a
       * Win32 thread that has never called a pthreads-win32 routine that
       * required a POSIX handle.
       *
       * Implicit POSIX handles are cleaned up in ptw32_throw() now.
       */

#if ! defined (__MINGW32__) || defined (__MSVCRT__)  || defined (__DMC__)
      _endthreadex ((unsigned) (size_t) value_ptr);
#else
      _endthread ();
#endif

      /* Never reached */
    }
  else
    sp->exitStatus = value_ptr;

  ptw32_throw (PTW32_EPS_EXIT);

  /* Never reached. */
}