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

/* 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;

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

#endif

Revision:	1.18
Committed:	Thu Nov 12 07:02:37 2015 UTC (8 years, 6 months ago) by root
Content type:	text/plain
Branch:	MAIN
CVS Tags:	EV-rel-4_27, EV-rel-4_22, rel-4_23, rel-4_22, rel-4_27, rel-4_25, rel-4_24
Changes since 1.17:	+2 -0 lines
Log Message:	* empty log message *
#	User	Rev	Content
1	root	1.1	/*
2	root	1.4	* libev win32 compatibility cruft (_not_ a backend)
3	root	1.1	*
4	root	1.10	* Copyright (c) 2007,2008,2009 Marc Alexander Lehmann <libev@schmorp.de>
5	root	1.1	* All rights reserved.
6			*
7	root	1.4	* Redistribution and use in source and binary forms, with or without modifica-
8			* tion, are permitted provided that the following conditions are met:
9	root	1.14	*
10	root	1.4	* 1. Redistributions of source code must retain the above copyright notice,
11			* this list of conditions and the following disclaimer.
12	root	1.14	*
13	root	1.4	* 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	root	1.14	*
17	root	1.4	* 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	root	1.1	*
28	root	1.4	* 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	root	1.1	*/
39
40	root	1.2	#ifdef _WIN32
41	root	1.1
42			/* note: the comment below could not be substantiated, but what would I care */
43			/* MSDN says this is required to handle SIGFPE */
44	root	1.6	/* my wild guess would be that using something floating-pointy is required */
45			/* for the crt to do something about it */
46	root	1.14	volatile double SIGFPE_REQ = 0.0f;
47	root	1.1
48	root	1.15	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	root	1.1	/* 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	root	1.7	struct sockaddr_in adr2;
65	root	1.9	int adr2_size = sizeof (adr2);
66	root	1.1	SOCKET listener;
67			SOCKET sock [2] = { -1, -1 };
68
69	root	1.15	if ((listener = ev_tcp_socket ()) == INVALID_SOCKET)
70	root	1.1	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	root	1.7	if (getsockname (listener, (struct sockaddr *)&addr, &addr_size))
80	root	1.1	goto fail;
81
82			if (listen (listener, 1))
83			goto fail;
84
85	root	1.15	if ((sock [0] = ev_tcp_socket ()) == INVALID_SOCKET)
86	root	1.1	goto fail;
87
88	root	1.7	if (connect (sock [0], (struct sockaddr *)&addr, addr_size))
89	root	1.1	goto fail;
90
91	root	1.18	/* TODO: returns INVALID_SOCKET on winsock accept, not < 0. fix it */
92			/* when convenient, probably by just removing error checking altogether? */
93	root	1.7	if ((sock [1] = accept (listener, 0, 0)) < 0)
94			goto fail;
95
96	root	1.8	/* windows vista returns fantasy port numbers for sockets:
97	root	1.7	* 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	root	1.1	goto fail;
119
120			closesocket (listener);
121
122	root	1.3	#if EV_SELECT_IS_WINSOCKET
123	root	1.13	filedes [0] = EV_WIN32_HANDLE_TO_FD (sock [0]);
124			filedes [1] = EV_WIN32_HANDLE_TO_FD (sock [1]);
125	root	1.3	#else
126			/* when select isn't winsocket, we also expect socket, connect, accept etc.
127			* to work on fds */
128	root	1.1	filedes [0] = sock [0];
129			filedes [1] = sock [1];
130	root	1.3	#endif
131	root	1.1
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	root	1.16
146	root	1.11	#define EV_HAVE_EV_TIME 1
147			ev_tstamp
148			ev_time (void)
149	root	1.1	{
150	root	1.11	FILETIME ft;
151			ULARGE_INTEGER ui;
152	root	1.1
153	root	1.11	GetSystemTimeAsFileTime (&ft);
154			ui.u.LowPart = ft.dwLowDateTime;
155			ui.u.HighPart = ft.dwHighDateTime;
156	root	1.1
157	root	1.11	/* msvc cannot convert ulonglong to double... yes, it is that sucky */
158	root	1.12	return (LONGLONG)(ui.QuadPart - 116444736000000000) * 1e-7;
159	root	1.1	}
160
161			#endif
162	root	1.2