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

   1 /*
   2  * pthread_getspecific.c
   3  *
   4  * Description:
   5  * POSIX thread functions which implement thread-specific data (TSD).
   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 void *
  42 pthread_getspecific (pthread_key_t key)
  43      /*
  44       * ------------------------------------------------------
  45       * DOCPUBLIC
  46       *      This function returns the current value of key in the
  47       *      calling thread. If no value has been set for 'key' in
  48       *      the thread, NULL is returned.
  49       *
  50       * PARAMETERS
  51       *      key
  52       *              an instance of pthread_key_t
  53       *
  54       *
  55       * DESCRIPTION
  56       *      This function returns the current value of key in the
  57       *      calling thread. If no value has been set for 'key' in
  58       *      the thread, NULL is returned.
  59       *
  60       * RESULTS
  61       *              key value or NULL on failure
  62       *
  63       * ------------------------------------------------------
  64       */
  65 {
  66   void * ptr;
  67
  68   if (key == NULL)
  69     {
  70       ptr = NULL;
  71     }
  72   else
  73     {
  74       int lasterror = GetLastError ();
  75 #if defined(RETAIN_WSALASTERROR)
  76       int lastWSAerror = WSAGetLastError ();
  77 #endif
  78       ptr = TlsGetValue (key->key);
  79
  80       SetLastError (lasterror);
  81 #if defined(RETAIN_WSALASTERROR)
  82       WSASetLastError (lastWSAerror);
  83 #endif
  84     }
  85
  86   return ptr;
  87 }