pthread_kill.c

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/*
 * pthread_kill.c
 *
 * Description:
 * This translation unit implements the pthread_kill routine.
 *
 * --------------------------------------------------------------------------
 *
 *      Pthreads-win32 - POSIX Threads Library for Win32
 *      Copyright(C) 1998 John E. Bossom
 *      Copyright(C) 1999,2003 Pthreads-win32 contributors
 * 
 *      Contact Email: [e-mail]
 * 
 *      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
 */

#include "pthread.h"
#include "implement.h"

/*
 * Not needed yet, but defining it should indicate clashes with build target
 * environment that should be fixed.
 */
#include <signal.h>

int
pthread_kill (pthread_t thread, int sig)
     /*
      * ------------------------------------------------------
      * DOCPUBLIC
      *      This function requests that a signal be delivered to the
      *      specified thread. If sig is zero, error checking is
      *      performed but no signal is actually sent such that this
      *      function can be used to check for a valid thread ID.
      *
      * PARAMETERS
      *      thread  reference to an instances of pthread_t
      *      sig     signal. Currently only a value of 0 is supported.
      *
      *
      * DESCRIPTION
      *      This function requests that a signal be delivered to the
      *      specified thread. If sig is zero, error checking is
      *      performed but no signal is actually sent such that this
      *      function can be used to check for a valid thread ID.
      *
      * RESULTS
      * 	     ESRCH	     the thread is not a valid thread ID,
      *              EINVAL          the value of the signal is invalid
      *                              or unsupported.
      * 	     0		     the signal was successfully sent.
      *
      * ------------------------------------------------------
      */
{
  int result = 0;

  EnterCriticalSection(&ptw32_thread_reuse_lock);

  if (NULL == thread
        || NULL == thread->threadH
        || THREAD_PRIORITY_ERROR_RETURN == GetThreadPriority(thread->threadH))
    {
      result = ESRCH;
    }

  LeaveCriticalSection(&ptw32_thread_reuse_lock);

  if (0 == result && 0 != sig)
    {
      /*
       * Currently does not support any signals.
       */
      result = EINVAL;
    }

  return result;

}				/* pthread_kill */