crypto/external/bsd/heimdal/dist/lib/roken/sockstartup_w32.c

   1 /*      $NetBSD: sockstartup_w32.c,v 1.1.1.2 2014/04/24 12:45:52 pettai Exp $   */
   2
   3 /***********************************************************************
   4  * Copyright (c) 2009, Secure Endpoints Inc.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  *
  11  * - Redistributions of source code must retain the above copyright
  12  *   notice, this list of conditions and the following disclaimer.
  13  *
  14  * - Redistributions in binary form must reproduce the above copyright
  15  *   notice, this list of conditions and the following disclaimer in
  16  *   the documentation and/or other materials provided with the
  17  *   distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  20  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  21  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  22  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
  23  * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
  24  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  25  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  26  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  28  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  29  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  30  * OF THE POSSIBILITY OF SUCH DAMAGE.
  31  *
  32  **********************************************************************/
  33
  34 #include<config.h>
  35
  36 #include <krb5/roken.h>
  37
  38 #ifndef _WIN32
  39 #error Only implemented for Windows
  40 #endif
  41
  42 volatile LONG _startup_count = 0;
  43
  44 ROKEN_LIB_FUNCTION int ROKEN_LIB_CALL
  45 rk_WSAStartup(void)
  46 {
  47     WSADATA wsad;
  48
  49     if (!WSAStartup( MAKEWORD(2, 2), &wsad )) {
  50         if (wsad.wVersion != MAKEWORD(2, 2)) {
  51             /* huh? We can't use 2.2? */
  52             WSACleanup();
  53             return -1;
  54         }
  55
  56         InterlockedIncrement(&_startup_count);
  57         return 0;
  58     }
  59
  60     return -1;
  61 }
  62
  63
  64 ROKEN_LIB_FUNCTION int ROKEN_LIB_CALL
  65 rk_WSACleanup(void)
  66 {
  67     LONG l;
  68
  69     if ((l = InterlockedDecrement(&_startup_count)) < 0) {
  70         l = InterlockedIncrement(&_startup_count) - 1;
  71     }
  72
  73     if (l >= 0) {
  74         return WSACleanup();
  75     }
  76     return -1;
  77 }