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;

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

#endif

Revision:	1.21
Committed:	Tue Nov 19 20:09:49 2019 UTC (4 years, 9 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 *
#	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