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/cvs/libev/ev_win32.c
Revision: 1.21
Committed: Tue Nov 19 20:09:49 2019 UTC (4 years, 7 months ago) by root
Content type: text/plain
Branch: MAIN
CVS Tags: EV-rel-4_28, EV-rel-4_29, rel-4_33, EV-rel-4_31, EV-rel-4_30, rel-4_31, HEAD
Changes since 1.20: +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 /* 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
48 static SOCKET
49 ev_tcp_socket (void)
50 {
51 #if EV_USE_WSASOCKET
52 return WSASocket (AF_INET, SOCK_STREAM, 0, 0, 0, 0);
53 #else
54 return socket (AF_INET, SOCK_STREAM, 0);
55 #endif
56 }
57
58 /* oh, the humanity! */
59 static int
60 ev_pipe (int filedes [2])
61 {
62 struct sockaddr_in addr = { 0 };
63 int addr_size = sizeof (addr);
64 struct sockaddr_in adr2;
65 int adr2_size = sizeof (adr2);
66 SOCKET listener;
67 SOCKET sock [2] = { -1, -1 };
68
69 if ((listener = ev_tcp_socket ()) == INVALID_SOCKET)
70 return -1;
71
72 addr.sin_family = AF_INET;
73 addr.sin_addr.s_addr = htonl (INADDR_LOOPBACK);
74 addr.sin_port = 0;
75
76 if (bind (listener, (struct sockaddr *)&addr, addr_size))
77 goto fail;
78
79 if (getsockname (listener, (struct sockaddr *)&addr, &addr_size))
80 goto fail;
81
82 if (listen (listener, 1))
83 goto fail;
84
85 if ((sock [0] = ev_tcp_socket ()) == INVALID_SOCKET)
86 goto fail;
87
88 if (connect (sock [0], (struct sockaddr *)&addr, addr_size))
89 goto fail;
90
91 /* TODO: returns INVALID_SOCKET on winsock accept, not < 0. fix it */
92 /* when convenient, probably by just removing error checking altogether? */
93 if ((sock [1] = accept (listener, 0, 0)) < 0)
94 goto fail;
95
96 /* windows vista returns fantasy port numbers for sockets:
97 * example for two interconnected tcp sockets:
98 *
99 * (Socket::unpack_sockaddr_in getsockname $sock0)[0] == 53364
100 * (Socket::unpack_sockaddr_in getpeername $sock0)[0] == 53363
101 * (Socket::unpack_sockaddr_in getsockname $sock1)[0] == 53363
102 * (Socket::unpack_sockaddr_in getpeername $sock1)[0] == 53365
103 *
104 * wow! tridirectional sockets!
105 *
106 * this way of checking ports seems to work:
107 */
108 if (getpeername (sock [0], (struct sockaddr *)&addr, &addr_size))
109 goto fail;
110
111 if (getsockname (sock [1], (struct sockaddr *)&adr2, &adr2_size))
112 goto fail;
113
114 errno = WSAEINVAL;
115 if (addr_size != adr2_size
116 || addr.sin_addr.s_addr != adr2.sin_addr.s_addr /* just to be sure, I mean, it's windows */
117 || addr.sin_port != adr2.sin_port)
118 goto fail;
119
120 closesocket (listener);
121
122 #if EV_SELECT_IS_WINSOCKET
123 filedes [0] = EV_WIN32_HANDLE_TO_FD (sock [0]);
124 filedes [1] = EV_WIN32_HANDLE_TO_FD (sock [1]);
125 #else
126 /* when select isn't winsocket, we also expect socket, connect, accept etc.
127 * to work on fds */
128 filedes [0] = sock [0];
129 filedes [1] = sock [1];
130 #endif
131
132 return 0;
133
134 fail:
135 closesocket (listener);
136
137 if (sock [0] != INVALID_SOCKET) closesocket (sock [0]);
138 if (sock [1] != INVALID_SOCKET) closesocket (sock [1]);
139
140 return -1;
141 }
142
143 #undef pipe
144 #define pipe(filedes) ev_pipe (filedes)
145
146 #define EV_HAVE_EV_TIME 1
147 ev_tstamp
148 ev_time (void)
149 {
150 FILETIME ft;
151 ULARGE_INTEGER ui;
152
153 GetSystemTimeAsFileTime (&ft);
154 ui.u.LowPart = ft.dwLowDateTime;
155 ui.u.HighPart = ft.dwHighDateTime;
156
157 /* also, msvc cannot convert ulonglong to double... yes, it is that sucky */
158 return EV_TS_FROM_USEC (((LONGLONG)(ui.QuadPart - 116444736000000000) * 1e-1));
159 }
160
161 #endif
162