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      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 (at) 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 }
     95