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/cvs/libev/ev_win32.c
Revision: 1.10
Committed: Sat Mar 28 22:17:17 2009 UTC (15 years, 3 months ago) by root
Content type: text/plain
Branch: MAIN
CVS Tags: rel-3_6
Changes since 1.9: +1 -1 lines
Log Message:
*** empty log message ***

File Contents

# Content
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
40 #ifdef _WIN32
41
42 /* timeb.h is actually xsi legacy functionality */
43 #include <sys/timeb.h>
44
45 /* note: the comment below could not be substantiated, but what would I care */
46 /* MSDN says this is required to handle SIGFPE */
47 /* my wild guess would be that using something floating-pointy is required */
48 /* for the crt to do something about it */
49 volatile double SIGFPE_REQ = 0.0f;
50
51 /* oh, the humanity! */
52 static int
53 ev_pipe (int filedes [2])
54 {
55 struct sockaddr_in addr = { 0 };
56 int addr_size = sizeof (addr);
57 struct sockaddr_in adr2;
58 int adr2_size = sizeof (adr2);
59 SOCKET listener;
60 SOCKET sock [2] = { -1, -1 };
61
62 if ((listener = socket (AF_INET, SOCK_STREAM, 0)) == INVALID_SOCKET)
63 return -1;
64
65 addr.sin_family = AF_INET;
66 addr.sin_addr.s_addr = htonl (INADDR_LOOPBACK);
67 addr.sin_port = 0;
68
69 if (bind (listener, (struct sockaddr *)&addr, addr_size))
70 goto fail;
71
72 if (getsockname (listener, (struct sockaddr *)&addr, &addr_size))
73 goto fail;
74
75 if (listen (listener, 1))
76 goto fail;
77
78 if ((sock [0] = socket (AF_INET, SOCK_STREAM, 0)) == INVALID_SOCKET)
79 goto fail;
80
81 if (connect (sock [0], (struct sockaddr *)&addr, addr_size))
82 goto fail;
83
84 if ((sock [1] = accept (listener, 0, 0)) < 0)
85 goto fail;
86
87 /* windows vista returns fantasy port numbers for sockets:
88 * example for two interconnected tcp sockets:
89 *
90 * (Socket::unpack_sockaddr_in getsockname $sock0)[0] == 53364
91 * (Socket::unpack_sockaddr_in getpeername $sock0)[0] == 53363
92 * (Socket::unpack_sockaddr_in getsockname $sock1)[0] == 53363
93 * (Socket::unpack_sockaddr_in getpeername $sock1)[0] == 53365
94 *
95 * wow! tridirectional sockets!
96 *
97 * this way of checking ports seems to work:
98 */
99 if (getpeername (sock [0], (struct sockaddr *)&addr, &addr_size))
100 goto fail;
101
102 if (getsockname (sock [1], (struct sockaddr *)&adr2, &adr2_size))
103 goto fail;
104
105 errno = WSAEINVAL;
106 if (addr_size != adr2_size
107 || addr.sin_addr.s_addr != adr2.sin_addr.s_addr /* just to be sure, I mean, it's windows */
108 || addr.sin_port != adr2.sin_port)
109 goto fail;
110
111 closesocket (listener);
112
113 #if EV_SELECT_IS_WINSOCKET
114 filedes [0] = _open_osfhandle (sock [0], 0);
115 filedes [1] = _open_osfhandle (sock [1], 0);
116 #else
117 /* when select isn't winsocket, we also expect socket, connect, accept etc.
118 * to work on fds */
119 filedes [0] = sock [0];
120 filedes [1] = sock [1];
121 #endif
122
123 return 0;
124
125 fail:
126 closesocket (listener);
127
128 if (sock [0] != INVALID_SOCKET) closesocket (sock [0]);
129 if (sock [1] != INVALID_SOCKET) closesocket (sock [1]);
130
131 return -1;
132 }
133
134 #undef pipe
135 #define pipe(filedes) ev_pipe (filedes)
136
137 static int
138 ev_gettimeofday (struct timeval *tv, struct timezone *tz)
139 {
140 struct _timeb tb;
141
142 _ftime (&tb);
143
144 tv->tv_sec = (long)tb.time;
145 tv->tv_usec = ((long)tb.millitm) * 1000;
146
147 return 0;
148 }
149
150 #undef gettimeofday
151 #define gettimeofday(tv,tz) ev_gettimeofday (tv, tz)
152
153 #endif
154