native_client_sdk/src/libraries/third_party/pthreads-win32/ptw32_tkAssocDestroy.c

   1 /*
   2  * ptw32_tkAssocDestroy.c
   3  *
   4  * Description:
   5  * This translation unit implements routines which are private to
   6  * the implementation and may be used throughout it.
   7  *
   8  * --------------------------------------------------------------------------
   9  *
  10  *      Pthreads-win32 - POSIX Threads Library for Win32
  11  *      Copyright(C) 1998 John E. Bossom
  12  *      Copyright(C) 1999,2005 Pthreads-win32 contributors
  13  *
  14  *      Contact Email: rpj@callisto.canberra.edu.au
  15  *
  16  *      The current list of contributors is contained
  17  *      in the file CONTRIBUTORS included with the source
  18  *      code distribution. The list can also be seen at the
  19  *      following World Wide Web location:
  20  *      http://sources.redhat.com/pthreads-win32/contributors.html
  21  *
  22  *      This library is free software; you can redistribute it and/or
  23  *      modify it under the terms of the GNU Lesser General Public
  24  *      License as published by the Free Software Foundation; either
  25  *      version 2 of the License, or (at your option) any later version.
  26  *
  27  *      This library is distributed in the hope that it will be useful,
  28  *      but WITHOUT ANY WARRANTY; without even the implied warranty of
  29  *      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  30  *      Lesser General Public License for more details.
  31  *
  32  *      You should have received a copy of the GNU Lesser General Public
  33  *      License along with this library in the file COPYING.LIB;
  34  *      if not, write to the Free Software Foundation, Inc.,
  35  *      59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
  36  */
  37
  38 #include "pthread.h"
  39 #include "implement.h"
  40
  41
  42 void
  43 ptw32_tkAssocDestroy (ThreadKeyAssoc * assoc)
  44      /*
  45       * -------------------------------------------------------------------
  46       * This routine releases all resources for the given ThreadKeyAssoc
  47       * once it is no longer being referenced
  48       * ie) either the key or thread has stopped referencing it.
  49       *
  50       * Parameters:
  51       *              assoc
  52       *                      an instance of ThreadKeyAssoc.
  53       * Returns:
  54       *      N/A
  55       * -------------------------------------------------------------------
  56       */
  57 {
  58
  59   /*
  60    * Both key->keyLock and thread->threadLock are locked before
  61    * entry to this routine.
  62    */
  63   if (assoc != NULL)
  64     {
  65       ThreadKeyAssoc * prev, * next;
  66
  67       /* Remove assoc from thread's keys chain */
  68       prev = assoc->prevKey;
  69       next = assoc->nextKey;
  70       if (prev != NULL)
  71         {
  72           prev->nextKey = next;
  73         }
  74       if (next != NULL)
  75         {
  76           next->prevKey = prev;
  77         }
  78
  79       if (assoc->thread->keys == assoc)
  80         {
  81           /* We're at the head of the thread's keys chain */
  82           assoc->thread->keys = next;
  83         }
  84       if (assoc->thread->nextAssoc == assoc)
  85         {
  86           /*
  87            * Thread is exiting and we're deleting the assoc to be processed next.
  88            * Hand thread the assoc after this one.
  89            */
  90           assoc->thread->nextAssoc = next;
  91         }
  92
  93       /* Remove assoc from key's threads chain */
  94       prev = assoc->prevThread;
  95       next = assoc->nextThread;
  96       if (prev != NULL)
  97         {
  98           prev->nextThread = next;
  99         }
 100       if (next != NULL)
 101         {
 102           next->prevThread = prev;
 103         }
 104
 105       if (assoc->key->threads == assoc)
 106         {
 107           /* We're at the head of the key's threads chain */
 108           assoc->key->threads = next;
 109         }
 110
 111       free (assoc);
 112     }
 113
 114 }                               /* ptw32_tkAssocDestroy */