native_client_sdk/src/libraries/third_party/pthreads-win32/pthread_kill.c

   1 /*
   2  * pthread_kill.c
   3  *
   4  * Description:
   5  * This translation unit implements the pthread_kill routine.
   6  *
   7  * --------------------------------------------------------------------------
   8  *
   9  *      Pthreads-win32 - POSIX Threads Library for Win32
  10  *      Copyright(C) 1998 John E. Bossom
  11  *      Copyright(C) 1999,2005 Pthreads-win32 contributors
  12  *
  13  *      Contact Email: rpj@callisto.canberra.edu.au
  14  *
  15  *      The current list of contributors is contained
  16  *      in the file CONTRIBUTORS included with the source
  17  *      code distribution. The list can also be seen at the
  18  *      following World Wide Web location:
  19  *      http://sources.redhat.com/pthreads-win32/contributors.html
  20  *
  21  *      This library is free software; you can redistribute it and/or
  22  *      modify it under the terms of the GNU Lesser General Public
  23  *      License as published by the Free Software Foundation; either
  24  *      version 2 of the License, or (at your option) any later version.
  25  *
  26  *      This library is distributed in the hope that it will be useful,
  27  *      but WITHOUT ANY WARRANTY; without even the implied warranty of
  28  *      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  29  *      Lesser General Public License for more details.
  30  *
  31  *      You should have received a copy of the GNU Lesser General Public
  32  *      License along with this library in the file COPYING.LIB;
  33  *      if not, write to the Free Software Foundation, Inc.,
  34  *      59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
  35  */
  36
  37 #include "pthread.h"
  38 #include "implement.h"
  39
  40 /*
  41  * Not needed yet, but defining it should indicate clashes with build target
  42  * environment that should be fixed.
  43  */
  44 #if !defined(WINCE)
  45 #  include <signal.h>
  46 #endif
  47
  48 int
  49 pthread_kill (pthread_t thread, int sig)
  50      /*
  51       * ------------------------------------------------------
  52       * DOCPUBLIC
  53       *      This function requests that a signal be delivered to the
  54       *      specified thread. If sig is zero, error checking is
  55       *      performed but no signal is actually sent such that this
  56       *      function can be used to check for a valid thread ID.
  57       *
  58       * PARAMETERS
  59       *      thread  reference to an instances of pthread_t
  60       *      sig     signal. Currently only a value of 0 is supported.
  61       *
  62       *
  63       * DESCRIPTION
  64       *      This function requests that a signal be delivered to the
  65       *      specified thread. If sig is zero, error checking is
  66       *      performed but no signal is actually sent such that this
  67       *      function can be used to check for a valid thread ID.
  68       *
  69       * RESULTS
  70       *              ESRCH           the thread is not a valid thread ID,
  71       *              EINVAL          the value of the signal is invalid
  72       *                              or unsupported.
  73       *              0               the signal was successfully sent.
  74       *
  75       * ------------------------------------------------------
  76       */
  77 {
  78   int result = 0;
  79   ptw32_thread_t * tp;
  80   ptw32_mcs_local_node_t node;
  81
  82   ptw32_mcs_lock_acquire(&ptw32_thread_reuse_lock, &node);
  83
  84   tp = (ptw32_thread_t *) thread.p;
  85
  86   if (NULL == tp
  87       || thread.x != tp->ptHandle.x
  88       || NULL == tp->threadH)
  89     {
  90       result = ESRCH;
  91     }
  92
  93   ptw32_mcs_lock_release(&node);
  94
  95   if (0 == result && 0 != sig)
  96     {
  97       /*
  98        * Currently does not support any signals.
  99        */
 100       result = EINVAL;
 101     }
 102
 103   return result;
 104
 105 }                               /* pthread_kill */