Mirror of :pserver:anonymous@cvs.schmorp.de/schmorpforge libev http://software.schmorp.de/pkg/libev.html
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  1. /*
  2. * libev win32 compatibility cruft (_not_ a backend)
  3. *
  4. * Copyright (c) 2007,2008,2009 Marc Alexander Lehmann <libev@schmorp.de>
  5. * All rights reserved.
  6. *
  7. * Redistribution and use in source and binary forms, with or without modifica-
  8. * tion, are permitted provided that the following conditions are met:
  9. *
  10. * 1. Redistributions of source code must retain the above copyright notice,
  11. * this list of conditions and the following disclaimer.
  12. *
  13. * 2. Redistributions in binary form must reproduce the above copyright
  14. * notice, this list of conditions and the following disclaimer in the
  15. * documentation and/or other materials provided with the distribution.
  16. *
  17. * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
  18. * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
  19. * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
  20. * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
  21. * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  22. * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
  23. * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  24. * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
  25. * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  26. * OF THE POSSIBILITY OF SUCH DAMAGE.
  27. *
  28. * Alternatively, the contents of this file may be used under the terms of
  29. * the GNU General Public License ("GPL") version 2 or any later version,
  30. * in which case the provisions of the GPL are applicable instead of
  31. * the above. If you wish to allow the use of your version of this file
  32. * only under the terms of the GPL and not to allow others to use your
  33. * version of this file under the BSD license, indicate your decision
  34. * by deleting the provisions above and replace them with the notice
  35. * and other provisions required by the GPL. If you do not delete the
  36. * provisions above, a recipient may use your version of this file under
  37. * either the BSD or the GPL.
  38. */
  39. #ifdef _WIN32
  40. /* timeb.h is actually xsi legacy functionality */
  41. #include <sys/timeb.h>
  42. /* note: the comment below could not be substantiated, but what would I care */
  43. /* MSDN says this is required to handle SIGFPE */
  44. /* my wild guess would be that using something floating-pointy is required */
  45. /* for the crt to do something about it */
  46. volatile double SIGFPE_REQ = 0.0f;
  47. /* oh, the humanity! */
  48. static int
  49. ev_pipe (int filedes [2])
  50. {
  51. struct sockaddr_in addr = { 0 };
  52. int addr_size = sizeof (addr);
  53. struct sockaddr_in adr2;
  54. int adr2_size = sizeof (adr2);
  55. SOCKET listener;
  56. SOCKET sock [2] = { -1, -1 };
  57. if ((listener = socket (AF_INET, SOCK_STREAM, 0)) == INVALID_SOCKET)
  58. return -1;
  59. addr.sin_family = AF_INET;
  60. addr.sin_addr.s_addr = htonl (INADDR_LOOPBACK);
  61. addr.sin_port = 0;
  62. if (bind (listener, (struct sockaddr *)&addr, addr_size))
  63. goto fail;
  64. if (getsockname (listener, (struct sockaddr *)&addr, &addr_size))
  65. goto fail;
  66. if (listen (listener, 1))
  67. goto fail;
  68. if ((sock [0] = socket (AF_INET, SOCK_STREAM, 0)) == INVALID_SOCKET)
  69. goto fail;
  70. if (connect (sock [0], (struct sockaddr *)&addr, addr_size))
  71. goto fail;
  72. if ((sock [1] = accept (listener, 0, 0)) < 0)
  73. goto fail;
  74. /* windows vista returns fantasy port numbers for sockets:
  75. * example for two interconnected tcp sockets:
  76. *
  77. * (Socket::unpack_sockaddr_in getsockname $sock0)[0] == 53364
  78. * (Socket::unpack_sockaddr_in getpeername $sock0)[0] == 53363
  79. * (Socket::unpack_sockaddr_in getsockname $sock1)[0] == 53363
  80. * (Socket::unpack_sockaddr_in getpeername $sock1)[0] == 53365
  81. *
  82. * wow! tridirectional sockets!
  83. *
  84. * this way of checking ports seems to work:
  85. */
  86. if (getpeername (sock [0], (struct sockaddr *)&addr, &addr_size))
  87. goto fail;
  88. if (getsockname (sock [1], (struct sockaddr *)&adr2, &adr2_size))
  89. goto fail;
  90. errno = WSAEINVAL;
  91. if (addr_size != adr2_size
  92. || addr.sin_addr.s_addr != adr2.sin_addr.s_addr /* just to be sure, I mean, it's windows */
  93. || addr.sin_port != adr2.sin_port)
  94. goto fail;
  95. closesocket (listener);
  96. #if EV_SELECT_IS_WINSOCKET
  97. filedes [0] = _open_osfhandle (sock [0], 0);
  98. filedes [1] = _open_osfhandle (sock [1], 0);
  99. #else
  100. /* when select isn't winsocket, we also expect socket, connect, accept etc.
  101. * to work on fds */
  102. filedes [0] = sock [0];
  103. filedes [1] = sock [1];
  104. #endif
  105. return 0;
  106. fail:
  107. closesocket (listener);
  108. if (sock [0] != INVALID_SOCKET) closesocket (sock [0]);
  109. if (sock [1] != INVALID_SOCKET) closesocket (sock [1]);
  110. return -1;
  111. }
  112. #undef pipe
  113. #define pipe(filedes) ev_pipe (filedes)
  114. #define EV_HAVE_EV_TIME 1
  115. ev_tstamp
  116. ev_time (void)
  117. {
  118. FILETIME ft;
  119. ULARGE_INTEGER ui;
  120. GetSystemTimeAsFileTime (&ft);
  121. ui.u.LowPart = ft.dwLowDateTime;
  122. ui.u.HighPart = ft.dwHighDateTime;
  123. /* msvc cannot convert ulonglong to double... yes, it is that sucky */
  124. return (LONGLONG)(ui.QuadPart - 116444736000000000) * 1e-7;
  125. }
  126. #endif