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- /*
- * libev win32 compatibility cruft (_not_ a backend)
- *
- * Copyright (c) 2007,2008,2009 Marc Alexander Lehmann <libev@schmorp.de>
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without modifica-
- * tion, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- * this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
- * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
- * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
- * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
- * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
- * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
- * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
- * OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * Alternatively, the contents of this file may be used under the terms of
- * the GNU General Public License ("GPL") version 2 or any later version,
- * in which case the provisions of the GPL are applicable instead of
- * the above. If you wish to allow the use of your version of this file
- * only under the terms of the GPL and not to allow others to use your
- * version of this file under the BSD license, indicate your decision
- * by deleting the provisions above and replace them with the notice
- * and other provisions required by the GPL. If you do not delete the
- * provisions above, a recipient may use your version of this file under
- * either the BSD or the GPL.
- */
-
- #ifdef _WIN32
-
- /* note: the comment below could not be substantiated, but what would I care */
- /* MSDN says this is required to handle SIGFPE */
- /* my wild guess would be that using something floating-pointy is required */
- /* for the crt to do something about it */
- volatile double SIGFPE_REQ = 0.0f;
-
- static SOCKET
- ev_tcp_socket (void)
- {
- #if EV_USE_WSASOCKET
- return WSASocket (AF_INET, SOCK_STREAM, 0, 0, 0, 0);
- #else
- return socket (AF_INET, SOCK_STREAM, 0);
- #endif
- }
-
- /* oh, the humanity! */
- static int
- ev_pipe (int filedes [2])
- {
- struct sockaddr_in addr = { 0 };
- int addr_size = sizeof (addr);
- struct sockaddr_in adr2;
- int adr2_size = sizeof (adr2);
- SOCKET listener;
- SOCKET sock [2] = { -1, -1 };
-
- if ((listener = ev_tcp_socket ()) == INVALID_SOCKET)
- return -1;
-
- addr.sin_family = AF_INET;
- addr.sin_addr.s_addr = htonl (INADDR_LOOPBACK);
- addr.sin_port = 0;
-
- if (bind (listener, (struct sockaddr *)&addr, addr_size))
- goto fail;
-
- if (getsockname (listener, (struct sockaddr *)&addr, &addr_size))
- goto fail;
-
- if (listen (listener, 1))
- goto fail;
-
- if ((sock [0] = ev_tcp_socket ()) == INVALID_SOCKET)
- goto fail;
-
- if (connect (sock [0], (struct sockaddr *)&addr, addr_size))
- goto fail;
-
- /* TODO: returns INVALID_SOCKET on winsock accept, not < 0. fix it */
- /* when convenient, probably by just removing error checking altogether? */
- if ((sock [1] = accept (listener, 0, 0)) < 0)
- goto fail;
-
- /* windows vista returns fantasy port numbers for sockets:
- * example for two interconnected tcp sockets:
- *
- * (Socket::unpack_sockaddr_in getsockname $sock0)[0] == 53364
- * (Socket::unpack_sockaddr_in getpeername $sock0)[0] == 53363
- * (Socket::unpack_sockaddr_in getsockname $sock1)[0] == 53363
- * (Socket::unpack_sockaddr_in getpeername $sock1)[0] == 53365
- *
- * wow! tridirectional sockets!
- *
- * this way of checking ports seems to work:
- */
- if (getpeername (sock [0], (struct sockaddr *)&addr, &addr_size))
- goto fail;
-
- if (getsockname (sock [1], (struct sockaddr *)&adr2, &adr2_size))
- goto fail;
-
- errno = WSAEINVAL;
- if (addr_size != adr2_size
- || addr.sin_addr.s_addr != adr2.sin_addr.s_addr /* just to be sure, I mean, it's windows */
- || addr.sin_port != adr2.sin_port)
- goto fail;
-
- closesocket (listener);
-
- #if EV_SELECT_IS_WINSOCKET
- filedes [0] = EV_WIN32_HANDLE_TO_FD (sock [0]);
- filedes [1] = EV_WIN32_HANDLE_TO_FD (sock [1]);
- #else
- /* when select isn't winsocket, we also expect socket, connect, accept etc.
- * to work on fds */
- filedes [0] = sock [0];
- filedes [1] = sock [1];
- #endif
-
- return 0;
-
- fail:
- closesocket (listener);
-
- if (sock [0] != INVALID_SOCKET) closesocket (sock [0]);
- if (sock [1] != INVALID_SOCKET) closesocket (sock [1]);
-
- return -1;
- }
-
- #undef pipe
- #define pipe(filedes) ev_pipe (filedes)
-
- #define EV_HAVE_EV_TIME 1
- ev_tstamp
- ev_time (void)
- {
- FILETIME ft;
- ULARGE_INTEGER ui;
-
- GetSystemTimeAsFileTime (&ft);
- ui.u.LowPart = ft.dwLowDateTime;
- ui.u.HighPart = ft.dwHighDateTime;
-
- /* also, msvc cannot convert ulonglong to double... yes, it is that sucky */
- return EV_TS_FROM_USEC (((LONGLONG)(ui.QuadPart - 116444736000000000) * 1e-1));
- }
-
- #endif
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