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
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  10  *   notice, this list of conditions and the following disclaimer.
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  12  * - Redistributions in binary form must reproduce the above copyright
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  17  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  18  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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  21  * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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  30  **********************************************************************/
  31
  32 #ifdef HAVE_CONFIG_H
  33 #include<config.h>
  34 #endif
  35
  36 #include <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 }