lib/roken/sockstartup_w32.c

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