native_client_sdk/src/libraries/third_party/pthreads-win32/ptw32_new.c

   1 /*
   2  * ptw32_new.c
   3  *
   4  * Description:
   5  * This translation unit implements miscellaneous thread functions.
   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 pthread_t
  42 ptw32_new (void)
  43 {
  44   pthread_t t;
  45   pthread_t nil = {NULL, 0};
  46   ptw32_thread_t * tp;
  47
  48   /*
  49    * If there's a reusable pthread_t then use it.
  50    */
  51   t = ptw32_threadReusePop ();
  52
  53   if (NULL != t.p)
  54     {
  55       tp = (ptw32_thread_t *) t.p;
  56     }
  57   else
  58     {
  59       /* No reuse threads available */
  60       tp = (ptw32_thread_t *) calloc (1, sizeof(ptw32_thread_t));
  61
  62       if (tp == NULL)
  63         {
  64           return nil;
  65         }
  66
  67       /* ptHandle.p needs to point to it's parent ptw32_thread_t. */
  68       t.p = tp->ptHandle.p = tp;
  69       t.x = tp->ptHandle.x = 0;
  70     }
  71
  72   /* Set default state. */
  73   tp->seqNumber = ++ptw32_threadSeqNumber;
  74   tp->sched_priority = THREAD_PRIORITY_NORMAL;
  75   tp->detachState = PTHREAD_CREATE_JOINABLE;
  76   tp->cancelState = PTHREAD_CANCEL_ENABLE;
  77   tp->cancelType = PTHREAD_CANCEL_DEFERRED;
  78   tp->stateLock = 0;
  79   tp->threadLock = 0;
  80   tp->robustMxListLock = 0;
  81   tp->robustMxList = NULL;
  82   tp->cancelEvent = CreateEvent (0, (int) PTW32_TRUE,   /* manualReset  */
  83                                  (int) PTW32_FALSE,     /* setSignaled  */
  84                                  NULL);
  85
  86   if (tp->cancelEvent == NULL)
  87     {
  88       ptw32_threadReusePush (tp->ptHandle);
  89       return nil;
  90     }
  91
  92   return t;
  93
  94 }