libev/ev_win32.c

/*
 * 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

/* timeb.h is actually xsi legacy functionality */
#include <sys/timeb.h>

/* 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; 

/* 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 = socket (AF_INET, SOCK_STREAM, 0)) == 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] = socket (AF_INET, SOCK_STREAM, 0)) == INVALID_SOCKET) 
    goto fail;

  if (connect (sock [0], (struct sockaddr *)&addr, addr_size))
    goto fail;

  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;

  /* msvc cannot convert ulonglong to double... yes, it is that sucky */
  return (LONGLONG)(ui.QuadPart - 116444736000000000) * 1e-7;
}

#endif

Revision:	1.13
Committed:	Wed Aug 19 23:44:51 2009 UTC (14 years, 8 months ago) by root
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rel-4_01, rel-4_00, rel-4_03, rel-4_02, rel-3_9
Changes since 1.12:	+2 -2 lines
Log Message:	* empty log message *
#	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] = EV_WIN32_HANDLE_TO_FD (sock [0]);
115	filedes [1] = EV_WIN32_HANDLE_TO_FD (sock [1]);
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	#define EV_HAVE_EV_TIME 1
138	ev_tstamp
139	ev_time (void)
140	{
141	FILETIME ft;
142	ULARGE_INTEGER ui;
143
144	GetSystemTimeAsFileTime (&ft);
145	ui.u.LowPart = ft.dwLowDateTime;
146	ui.u.HighPart = ft.dwHighDateTime;
147
148	/* msvc cannot convert ulonglong to double... yes, it is that sucky */
149	return (LONGLONG)(ui.QuadPart - 116444736000000000) * 1e-7;
150	}
151
152	#endif
153