1 /* GLIB - Library of useful routines for C programming
2 * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
4 * giowin32.c: IO Channels for Win32.
5 * Copyright 1998 Owen Taylor and Tor Lillqvist
6 * Copyright 1999-2000 Tor Lillqvist and Craig Setera
7 * Copyright 2001-2003 Andrew Lanoix
9 * This library is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU Lesser General Public
11 * License as published by the Free Software Foundation; either
12 * version 2 of the License, or (at your option) any later version.
14 * This library is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * Lesser General Public License for more details.
19 * You should have received a copy of the GNU Lesser General Public
20 * License along with this library; if not, write to the
21 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
22 * Boston, MA 02111-1307, USA.
26 * Modified by the GLib Team and others 1997-2000. See the AUTHORS
27 * file for a list of people on the GLib Team. See the ChangeLog
28 * files for a list of changes. These files are distributed with
29 * GLib at ftp://ftp.gtk.org/pub/gtk/.
32 /* Define this to get (very) verbose logging of all channels */
33 /* #define G_IO_WIN32_DEBUG */
41 #include <winsock.h> /* Not everybody has winsock2 */
50 typedef struct _GIOWin32Channel GIOWin32Channel;
51 typedef struct _GIOWin32Watch GIOWin32Watch;
53 #define BUFFER_SIZE 4096
56 G_IO_WIN32_WINDOWS_MESSAGES, /* Windows messages */
57 G_IO_WIN32_FILE_DESC, /* Unix-like file descriptors from
58 * _open() or _pipe(). Read with read().
59 * Have to create separate thread to read.
61 G_IO_WIN32_SOCKET /* Sockets. A separate thread is blocked
62 * in select() most of the time.
64 } GIOWin32ChannelType;
66 struct _GIOWin32Channel {
68 gint fd; /* Either a Unix-like file handle as provided
69 * by the Microsoft C runtime, or a SOCKET
70 * as provided by WinSock.
72 GIOWin32ChannelType type;
76 CRITICAL_SECTION mutex;
78 /* This is used by G_IO_WIN32_WINDOWS_MESSAGES channels */
79 HWND hwnd; /* handle of window, or NULL */
81 /* Following fields are used by both fd and socket channels. */
82 gboolean running; /* Is reader thread running. FALSE if
83 * EOF has been reached.
85 gboolean needs_close; /* If the channel has been closed while
86 * the reader thread was still running.
88 guint thread_id; /* If non-NULL has a reader thread, or has
90 HANDLE data_avail_event;
94 /* Following fields used by fd channels for input */
96 /* Data is kept in a circular buffer. To be able to distinguish between
97 * empty and full buffer, we cannot fill it completely, but have to
98 * leave a one character gap.
100 * Data available is between indexes rdp and wrp-1 (modulo BUFFER_SIZE).
103 * Full: (wrp + 1) % BUFFER_SIZE == rdp
106 guchar *buffer; /* (Circular) buffer */
107 gint wrp, rdp; /* Buffer indices for writing and reading */
108 HANDLE space_avail_event;
110 /* Following fields used by socket channels */
112 HANDLE data_avail_noticed_event;
113 gint reset_send; /* socket used to send data so select_thread() can reset/re-loop */
114 gint reset_recv; /* socket used to recv data so select_thread() can reset/re-loop */
117 #define LOCK(mutex) EnterCriticalSection (&mutex)
118 #define UNLOCK(mutex) LeaveCriticalSection (&mutex)
120 struct _GIOWin32Watch {
124 GIOCondition condition;
128 g_win32_print_access_mode (int flags)
130 g_print ("%s%s%s%s%s%s%s%s%s%s",
131 ((flags & 0x3) == _O_RDWR ? "O_RDWR" :
132 ((flags & 0x3) == _O_RDONLY ? "O_RDONLY" :
133 ((flags & 0x3) == _O_WRONLY ? "O_WRONLY" : "0"))),
134 (flags & _O_APPEND ? "|O_APPEND" : ""),
135 (flags & _O_RANDOM ? "|O_RANDOM" : ""),
136 (flags & _O_SEQUENTIAL ? "|O_SEQUENTIAL" : ""),
137 (flags & _O_TEMPORARY ? "|O_TEMPORARY" : ""),
138 (flags & _O_CREAT ? "|O_CREAT" : ""),
139 (flags & _O_TRUNC ? "|O_TRUNC" : ""),
140 (flags & _O_EXCL ? "|O_EXCL" : ""),
141 (flags & _O_TEXT ? "|O_TEXT" : ""),
142 (flags & _O_BINARY ? "|O_BINARY" : ""));
146 g_win32_print_gioflags (GIOFlags flags)
150 if (flags & G_IO_FLAG_APPEND)
151 bar = "|", g_print ("APPEND");
152 if (flags & G_IO_FLAG_NONBLOCK)
153 g_print ("%sNONBLOCK", bar), bar = "|";
154 if (flags & G_IO_FLAG_IS_READABLE)
155 g_print ("%sREADABLE", bar), bar = "|";
156 if (flags & G_IO_FLAG_IS_WRITEABLE)
157 g_print ("%sWRITEABLE", bar), bar = "|";
158 if (flags & G_IO_FLAG_IS_SEEKABLE)
159 g_print ("%sSEEKABLE", bar), bar = "|";
163 g_io_win32_get_debug_flag (void)
165 #ifdef G_IO_WIN32_DEBUG
168 if (getenv ("G_IO_WIN32_DEBUG") != NULL)
176 g_io_channel_win32_init (GIOWin32Channel *channel)
178 channel->debug = g_io_win32_get_debug_flag ();
179 channel->buffer = NULL;
180 channel->running = FALSE;
181 channel->needs_close = FALSE;
182 channel->thread_id = 0;
183 channel->data_avail_event = NULL;
184 channel->revents = 0;
185 channel->space_avail_event = NULL;
186 channel->reset_send = INVALID_SOCKET;
187 channel->reset_recv = INVALID_SOCKET;
188 channel->data_avail_noticed_event = NULL;
189 channel->watches = NULL;
190 InitializeCriticalSection (&channel->mutex);
194 create_events (GIOWin32Channel *channel)
196 SECURITY_ATTRIBUTES sec_attrs;
198 sec_attrs.nLength = sizeof (SECURITY_ATTRIBUTES);
199 sec_attrs.lpSecurityDescriptor = NULL;
200 sec_attrs.bInheritHandle = FALSE;
202 /* The data available event is manual reset, the space available event
203 * is automatic reset.
205 if (!(channel->data_avail_event = CreateEvent (&sec_attrs, TRUE, FALSE, NULL))
206 || !(channel->space_avail_event = CreateEvent (&sec_attrs, FALSE, FALSE, NULL))
207 || !(channel->data_avail_noticed_event = CreateEvent (&sec_attrs, FALSE, FALSE, NULL)))
209 gchar *emsg = g_win32_error_message (GetLastError ());
210 g_error ("Error creating event: %s", emsg);
215 static unsigned __stdcall
216 read_thread (void *parameter)
218 GIOWin32Channel *channel = parameter;
222 g_io_channel_ref ((GIOChannel *)channel);
225 g_print ("read_thread %#x: start fd:%d, data_avail:%#x space_avail:%#x\n",
228 (guint) channel->data_avail_event,
229 (guint) channel->space_avail_event);
231 channel->buffer = g_malloc (BUFFER_SIZE);
232 channel->rdp = channel->wrp = 0;
233 channel->running = TRUE;
235 SetEvent (channel->space_avail_event);
237 LOCK (channel->mutex);
238 while (channel->running)
241 g_print ("read_thread %#x: rdp=%d, wrp=%d\n",
242 channel->thread_id, channel->rdp, channel->wrp);
243 if ((channel->wrp + 1) % BUFFER_SIZE == channel->rdp)
247 g_print ("read_thread %#x: resetting space_avail\n",
249 ResetEvent (channel->space_avail_event);
251 g_print ("read_thread %#x: waiting for space\n",
253 UNLOCK (channel->mutex);
254 WaitForSingleObject (channel->space_avail_event, INFINITE);
255 LOCK (channel->mutex);
257 g_print ("read_thread %#x: rdp=%d, wrp=%d\n",
258 channel->thread_id, channel->rdp, channel->wrp);
261 buffer = channel->buffer + channel->wrp;
263 /* Always leave at least one byte unused gap to be able to
264 * distinguish between the full and empty condition...
266 nbytes = MIN ((channel->rdp + BUFFER_SIZE - channel->wrp - 1) % BUFFER_SIZE,
267 BUFFER_SIZE - channel->wrp);
270 g_print ("read_thread %#x: calling read() for %d bytes\n",
271 channel->thread_id, nbytes);
273 UNLOCK (channel->mutex);
275 nbytes = read (channel->fd, buffer, nbytes);
277 LOCK (channel->mutex);
279 channel->revents = G_IO_IN;
281 channel->revents |= G_IO_HUP;
283 channel->revents |= G_IO_ERR;
286 g_print ("read_thread %#x: read() returned %d, rdp=%d, wrp=%d\n",
287 channel->thread_id, nbytes, channel->rdp, channel->wrp);
292 channel->wrp = (channel->wrp + nbytes) % BUFFER_SIZE;
294 g_print ("read_thread %#x: rdp=%d, wrp=%d, setting data_avail\n",
295 channel->thread_id, channel->rdp, channel->wrp);
296 SetEvent (channel->data_avail_event);
299 channel->running = FALSE;
300 if (channel->needs_close)
303 g_print ("read_thread %#x: channel fd %d needs closing\n",
304 channel->thread_id, channel->fd);
310 g_print ("read_thread %#x: EOF, rdp=%d, wrp=%d, setting data_avail\n",
311 channel->thread_id, channel->rdp, channel->wrp);
312 SetEvent (channel->data_avail_event);
313 UNLOCK (channel->mutex);
315 g_io_channel_unref ((GIOChannel *)channel);
317 /* No need to call _endthreadex(), the actual thread starter routine
318 * in MSVCRT (see crt/src/threadex.c:_threadstartex) calls
319 * _endthreadex() for us.
326 create_thread (GIOWin32Channel *channel,
327 GIOCondition condition,
328 unsigned (__stdcall *thread) (void *parameter))
330 HANDLE thread_handle;
332 thread_handle = (HANDLE) _beginthreadex (NULL, 0, thread, channel, 0,
333 &channel->thread_id);
334 if (thread_handle == 0)
335 g_warning (G_STRLOC ": Error creating reader thread: %s",
337 else if (!CloseHandle (thread_handle))
338 g_warning (G_STRLOC ": Error closing thread handle: %s\n",
339 g_win32_error_message (GetLastError ()));
341 WaitForSingleObject (channel->space_avail_event, INFINITE);
345 init_reset_sockets (GIOWin32Channel *channel)
347 struct sockaddr_in local, local2, server;
350 channel->reset_send = (gint) socket (AF_INET, SOCK_DGRAM, 0);
351 if (channel->reset_send == INVALID_SOCKET)
353 g_warning (G_STRLOC ": Error creating reset_send socket: %s\n",
354 g_win32_error_message (WSAGetLastError ()));
357 local.sin_family = AF_INET;
359 local.sin_addr.s_addr = htonl (INADDR_LOOPBACK);
361 if (bind (channel->reset_send, (struct sockaddr *)&local, sizeof (local)) == SOCKET_ERROR)
363 g_warning (G_STRLOC ": Error binding to reset_send socket: %s\n",
364 g_win32_error_message (WSAGetLastError ()));
367 local2.sin_family = AF_INET;
369 local2.sin_addr.s_addr = htonl (INADDR_LOOPBACK);
371 channel->reset_recv = (gint) socket (AF_INET, SOCK_DGRAM, 0);
372 if (channel->reset_recv == INVALID_SOCKET)
374 g_warning (G_STRLOC ": Error creating reset_recv socket: %s\n",
375 g_win32_error_message (WSAGetLastError ()));
378 if (bind (channel->reset_recv, (struct sockaddr *)&local2, sizeof (local)) == SOCKET_ERROR)
380 g_warning (G_STRLOC ": Error binding to reset_recv socket: %s\n",
381 g_win32_error_message (WSAGetLastError ()));
384 len = sizeof (local2);
385 if (getsockname (channel->reset_recv, (struct sockaddr *)&local2, &len) == SOCKET_ERROR)
387 g_warning (G_STRLOC ": Error getsockname with reset_recv socket: %s\n",
388 g_win32_error_message (WSAGetLastError ()));
391 memset (&server, 0, sizeof (server));
392 server.sin_addr.s_addr = htonl (INADDR_LOOPBACK);
393 server.sin_family = AF_INET;
394 server.sin_port = local2.sin_port;
396 if (connect (channel->reset_send, (struct sockaddr *)&server, sizeof (server)) == SOCKET_ERROR)
398 g_warning (G_STRLOC ": connect to reset_recv socket: %s\n",
399 g_win32_error_message (WSAGetLastError ()));
405 buffer_read (GIOWin32Channel *channel,
414 LOCK (channel->mutex);
416 g_print ("reading from thread %#x %d bytes, rdp=%d, wrp=%d\n",
417 channel->thread_id, count, channel->rdp, channel->wrp);
419 if (channel->wrp == channel->rdp)
421 UNLOCK (channel->mutex);
423 g_print ("waiting for data from thread %#x\n", channel->thread_id);
424 WaitForSingleObject (channel->data_avail_event, INFINITE);
426 g_print ("done waiting for data from thread %#x\n", channel->thread_id);
427 LOCK (channel->mutex);
428 if (channel->wrp == channel->rdp && !channel->running)
431 g_print ("wrp==rdp, !running\n");
432 UNLOCK (channel->mutex);
434 return G_IO_STATUS_EOF;
438 if (channel->rdp < channel->wrp)
439 nbytes = channel->wrp - channel->rdp;
441 nbytes = BUFFER_SIZE - channel->rdp;
442 UNLOCK (channel->mutex);
443 nbytes = MIN (left, nbytes);
445 g_print ("moving %d bytes from thread %#x\n",
446 nbytes, channel->thread_id);
447 memcpy (dest, channel->buffer + channel->rdp, nbytes);
450 LOCK (channel->mutex);
451 channel->rdp = (channel->rdp + nbytes) % BUFFER_SIZE;
453 g_print ("setting space_avail for thread %#x\n", channel->thread_id);
454 SetEvent (channel->space_avail_event);
456 g_print ("for thread %#x: rdp=%d, wrp=%d\n",
457 channel->thread_id, channel->rdp, channel->wrp);
458 if (channel->running && channel->wrp == channel->rdp)
461 g_print ("resetting data_avail of thread %#x\n",
463 ResetEvent (channel->data_avail_event);
465 UNLOCK (channel->mutex);
467 /* We have no way to indicate any errors form the actual
468 * read() or recv() call in the reader thread. Should we have?
470 *bytes_read = count - left;
471 return (*bytes_read > 0) ? G_IO_STATUS_NORMAL : G_IO_STATUS_EOF;
474 static unsigned __stdcall
475 select_thread (void *parameter)
477 GIOWin32Channel *channel = parameter;
478 fd_set read_fds, write_fds, except_fds;
483 g_io_channel_ref ((GIOChannel *)channel);
486 g_print ("select_thread %#x: start fd:%d data_avail:%#x data_avail_noticed:%#x\n",
489 (guint) channel->data_avail_event,
490 (guint) channel->data_avail_noticed_event);
492 channel->rdp = channel->wrp = 0;
493 channel->running = TRUE;
495 SetEvent (channel->space_avail_event);
497 while (channel->running)
500 FD_ZERO (&write_fds);
501 FD_ZERO (&except_fds);
502 FD_SET (channel->reset_recv, &read_fds);
504 LOCK (channel->mutex);
505 tmp = channel->watches;
508 GIOWin32Watch *watch = (GIOWin32Watch *)tmp->data;
510 if (watch->condition & (G_IO_IN | G_IO_HUP))
511 FD_SET (channel->fd, &read_fds);
512 if (watch->condition & G_IO_OUT)
513 FD_SET (channel->fd, &write_fds);
514 if (watch->condition & G_IO_ERR)
515 FD_SET (channel->fd, &except_fds);
519 UNLOCK (channel->mutex);
522 g_print ("select_thread %#x: calling select() for%s%s%s\n",
524 (FD_ISSET (channel->fd, &read_fds) ? " IN" : ""),
525 (FD_ISSET (channel->fd, &write_fds) ? " OUT" : ""),
526 (FD_ISSET (channel->fd, &except_fds) ? " ERR" : ""));
528 n = select (1, &read_fds, &write_fds, &except_fds, NULL);
530 LOCK (channel->mutex);
531 if (channel->needs_close)
533 UNLOCK (channel->mutex);
536 UNLOCK (channel->mutex);
538 if (n == SOCKET_ERROR)
541 g_print ("select_thread %#x: select returned SOCKET_ERROR\n",
546 if (FD_ISSET (channel->reset_recv, &read_fds))
549 g_print ("select_thread %#x: re-looping\n",
551 recv (channel->reset_recv, (char *)&buffer, (int) sizeof (buffer), 0);
556 g_print ("select_thread %#x: got%s%s%s\n",
558 (FD_ISSET (channel->fd, &read_fds) ? " IN" : ""),
559 (FD_ISSET (channel->fd, &write_fds) ? " OUT" : ""),
560 (FD_ISSET (channel->fd, &except_fds) ? " ERR" : ""));
562 if (FD_ISSET (channel->fd, &read_fds))
563 channel->revents |= G_IO_IN;
564 if (FD_ISSET (channel->fd, &write_fds))
565 channel->revents |= G_IO_OUT;
566 if (FD_ISSET (channel->fd, &except_fds))
567 channel->revents |= G_IO_ERR;
570 g_print ("select_thread %#x: resetting data_avail_noticed, setting data_avail\n",
573 LOCK (channel->mutex);
574 ResetEvent (channel->data_avail_noticed_event);
575 SetEvent (channel->data_avail_event);
576 if (channel->needs_close)
578 UNLOCK (channel->mutex);
581 UNLOCK (channel->mutex);
584 g_print ("select_thread %#x: waiting for data_avail_noticed\n",
587 WaitForSingleObject (channel->data_avail_noticed_event, INFINITE);
589 g_print ("select_thread %#x: got data_avail_noticed\n",
593 LOCK (channel->mutex);
594 channel->running = FALSE;
596 g_print ("select_thread %#x: got error, setting data_avail\n",
598 SetEvent (channel->data_avail_event);
599 g_io_channel_unref ((GIOChannel *)channel);
600 UNLOCK (channel->mutex);
602 /* No need to call _endthreadex(), the actual thread starter routine
603 * in MSVCRT (see crt/src/threadex.c:_threadstartex) calls
604 * _endthreadex() for us.
611 g_io_win32_prepare (GSource *source,
614 GIOWin32Watch *watch = (GIOWin32Watch *)source;
615 GIOCondition buffer_condition = g_io_channel_get_buffer_condition (watch->channel);
616 GIOWin32Channel *channel = (GIOWin32Channel *)watch->channel;
621 g_print ("g_io_win32_prepare: for thread %#x buffer_condition:%#x\n"
622 " watch->pollfd.events:%#x watch->pollfd.revents:%#x channel->revents:%#x\n",
623 channel->thread_id, buffer_condition,
624 watch->pollfd.events, watch->pollfd.revents, channel->revents);
626 if (channel->type == G_IO_WIN32_FILE_DESC)
628 LOCK (channel->mutex);
629 if (channel->running && channel->wrp == channel->rdp)
632 g_print ("g_io_win32_prepare: for thread %#x, setting channel->revents = 0\n",
634 channel->revents = 0;
636 UNLOCK (channel->mutex);
638 else if (channel->type == G_IO_WIN32_SOCKET)
640 LOCK (channel->mutex);
641 channel->revents = 0;
643 g_print ("g_io_win32_prepare: for thread %#x, setting data_avail_noticed\n",
645 SetEvent (channel->data_avail_noticed_event);
647 g_print ("g_io_win32_prepare: thread %#x, there.\n",
649 UNLOCK (channel->mutex);
652 return ((watch->condition & buffer_condition) == watch->condition);
656 g_io_win32_check (GSource *source)
659 GIOWin32Watch *watch = (GIOWin32Watch *)source;
660 GIOWin32Channel *channel = (GIOWin32Channel *)watch->channel;
661 GIOCondition buffer_condition = g_io_channel_get_buffer_condition (watch->channel);
664 g_print ("g_io_win32_check: for thread %#x buffer_condition:%#x\n"
665 " watch->pollfd.events:%#x watch->pollfd.revents:%#x channel->revents:%#x\n",
666 channel->thread_id, buffer_condition,
667 watch->pollfd.events, watch->pollfd.revents, channel->revents);
669 if (channel->type != G_IO_WIN32_WINDOWS_MESSAGES)
671 watch->pollfd.revents = (watch->pollfd.events & channel->revents);
675 return (PeekMessage (&msg, channel->hwnd, 0, 0, PM_NOREMOVE));
678 if (channel->type == G_IO_WIN32_SOCKET)
680 LOCK (channel->mutex);
682 g_print ("g_io_win32_check: thread %#x, resetting data_avail\n",
684 ResetEvent (channel->data_avail_event);
686 g_print ("g_io_win32_check: thread %#x, there.\n",
688 UNLOCK (channel->mutex);
691 return ((watch->pollfd.revents | buffer_condition) & watch->condition);
695 g_io_win32_dispatch (GSource *source,
696 GSourceFunc callback,
699 GIOFunc func = (GIOFunc)callback;
700 GIOWin32Watch *watch = (GIOWin32Watch *)source;
701 GIOCondition buffer_condition = g_io_channel_get_buffer_condition (watch->channel);
705 g_warning (G_STRLOC ": GIOWin32Watch dispatched without callback\n"
706 "You must call g_source_connect().");
710 return (*func) (watch->channel,
711 (watch->pollfd.revents | buffer_condition) & watch->condition,
716 g_io_win32_finalize (GSource *source)
718 GIOWin32Watch *watch = (GIOWin32Watch *)source;
719 GIOWin32Channel *channel = (GIOWin32Channel *)watch->channel;
720 char send_buffer[] = "f";
722 LOCK (channel->mutex);
724 g_print ("g_io_win32_finalize: channel with thread %#x\n",
727 channel->watches = g_slist_remove (channel->watches, watch);
729 SetEvent (channel->data_avail_noticed_event);
730 if (channel->type == G_IO_WIN32_SOCKET)
731 send (channel->reset_send, send_buffer, sizeof (send_buffer), 0);
733 g_io_channel_unref (watch->channel);
734 UNLOCK (channel->mutex);
737 GSourceFuncs g_io_watch_funcs = {
745 g_io_win32_create_watch (GIOChannel *channel,
746 GIOCondition condition,
747 unsigned (__stdcall *thread) (void *parameter))
749 GIOWin32Channel *win32_channel = (GIOWin32Channel *)channel;
750 GIOWin32Watch *watch;
752 char send_buffer[] = "c";
754 source = g_source_new (&g_io_watch_funcs, sizeof (GIOWin32Watch));
755 watch = (GIOWin32Watch *)source;
757 watch->channel = channel;
758 g_io_channel_ref (channel);
760 watch->condition = condition;
762 if (win32_channel->data_avail_event == NULL)
763 create_events (win32_channel);
765 watch->pollfd.fd = (gint) win32_channel->data_avail_event;
766 watch->pollfd.events = condition;
768 if (win32_channel->debug)
769 g_print ("g_io_win32_create_watch: fd:%d condition:%#x handle:%#x\n",
770 win32_channel->fd, condition, watch->pollfd.fd);
772 LOCK (win32_channel->mutex);
773 win32_channel->watches = g_slist_append (win32_channel->watches, watch);
775 if (win32_channel->thread_id == 0)
776 create_thread (win32_channel, condition, thread);
778 send (win32_channel->reset_send, send_buffer, sizeof (send_buffer), 0);
780 g_source_add_poll (source, &watch->pollfd);
781 UNLOCK (win32_channel->mutex);
787 g_io_win32_msg_read (GIOChannel *channel,
793 GIOWin32Channel *win32_channel = (GIOWin32Channel *)channel;
794 MSG msg; /* In case of alignment problems */
796 if (count < sizeof (MSG))
798 g_set_error (err, G_IO_CHANNEL_ERROR, G_IO_CHANNEL_ERROR_INVAL,
799 "Incorrect message size"); /* Informative enough error message? */
800 return G_IO_STATUS_ERROR;
803 if (win32_channel->debug)
804 g_print ("g_io_win32_msg_read: for %#x\n",
805 (guint) win32_channel->hwnd);
806 if (!PeekMessage (&msg, win32_channel->hwnd, 0, 0, PM_REMOVE))
807 return G_IO_STATUS_AGAIN;
809 memmove (buf, &msg, sizeof (MSG));
810 *bytes_read = sizeof (MSG);
812 return G_IO_STATUS_NORMAL;
816 g_io_win32_msg_write (GIOChannel *channel,
819 gsize *bytes_written,
822 GIOWin32Channel *win32_channel = (GIOWin32Channel *)channel;
825 if (count != sizeof (MSG))
827 g_set_error (err, G_IO_CHANNEL_ERROR, G_IO_CHANNEL_ERROR_INVAL,
828 "Incorrect message size"); /* Informative enough error message? */
829 return G_IO_STATUS_ERROR;
832 /* In case of alignment problems */
833 memmove (&msg, buf, sizeof (MSG));
834 if (!PostMessage (win32_channel->hwnd, msg.message, msg.wParam, msg.lParam))
836 gchar *emsg = g_win32_error_message (GetLastError ());
837 g_set_error (err, G_IO_CHANNEL_ERROR, G_IO_CHANNEL_ERROR_FAILED, emsg);
839 return G_IO_STATUS_ERROR;
842 *bytes_written = sizeof (MSG);
844 return G_IO_STATUS_NORMAL;
848 g_io_win32_msg_close (GIOChannel *channel,
851 /* Nothing to be done. Or should we set hwnd to some invalid value? */
853 return G_IO_STATUS_NORMAL;
857 g_io_win32_free (GIOChannel *channel)
859 GIOWin32Channel *win32_channel = (GIOWin32Channel *)channel;
861 if (win32_channel->debug)
862 g_print ("thread %#x: freeing channel, fd: %d\n",
863 win32_channel->thread_id,
866 if (win32_channel->reset_send && win32_channel->reset_send != INVALID_SOCKET)
867 closesocket (win32_channel->reset_send);
868 if (win32_channel->reset_recv && win32_channel->reset_recv != INVALID_SOCKET)
869 closesocket (win32_channel->reset_recv);
870 if (win32_channel->data_avail_event)
871 CloseHandle (win32_channel->data_avail_event);
872 if (win32_channel->space_avail_event)
873 CloseHandle (win32_channel->space_avail_event);
874 if (win32_channel->data_avail_noticed_event)
875 CloseHandle (win32_channel->data_avail_noticed_event);
876 DeleteCriticalSection (&win32_channel->mutex);
878 g_free (win32_channel->buffer);
879 g_slist_free (win32_channel->watches);
880 g_free (win32_channel);
884 g_io_win32_msg_create_watch (GIOChannel *channel,
885 GIOCondition condition)
887 GIOWin32Watch *watch;
890 source = g_source_new (&g_io_watch_funcs, sizeof (GIOWin32Watch));
891 watch = (GIOWin32Watch *)source;
893 watch->channel = channel;
894 g_io_channel_ref (channel);
896 watch->condition = condition;
898 watch->pollfd.fd = G_WIN32_MSG_HANDLE;
899 watch->pollfd.events = condition;
901 g_source_add_poll (source, &watch->pollfd);
907 g_io_win32_fd_read (GIOChannel *channel,
913 GIOWin32Channel *win32_channel = (GIOWin32Channel *)channel;
916 if (win32_channel->debug)
917 g_print ("g_io_win32_fd_read: fd:%d count:%d\n",
918 win32_channel->fd, count);
920 if (win32_channel->thread_id)
922 return buffer_read (win32_channel, buf, count, bytes_read, err);
925 result = read (win32_channel->fd, buf, count);
927 if (win32_channel->debug)
928 g_print ("g_io_win32_fd_read: read() = %d\n", result);
938 return G_IO_STATUS_AGAIN;
941 g_set_error (err, G_IO_CHANNEL_ERROR,
942 g_io_channel_error_from_errno (errno),
944 return G_IO_STATUS_ERROR;
948 *bytes_read = result;
950 return (result > 0) ? G_IO_STATUS_NORMAL : G_IO_STATUS_EOF;
954 g_io_win32_fd_write (GIOChannel *channel,
957 gsize *bytes_written,
960 GIOWin32Channel *win32_channel = (GIOWin32Channel *)channel;
963 result = write (win32_channel->fd, buf, count);
964 if (win32_channel->debug)
965 g_print ("g_io_win32_fd_write: fd:%d count:%d = %d\n",
966 win32_channel->fd, count, result);
976 return G_IO_STATUS_AGAIN;
979 g_set_error (err, G_IO_CHANNEL_ERROR,
980 g_io_channel_error_from_errno (errno),
982 return G_IO_STATUS_ERROR;
986 *bytes_written = result;
988 return G_IO_STATUS_NORMAL;
992 g_io_win32_fd_seek (GIOChannel *channel,
997 GIOWin32Channel *win32_channel = (GIOWin32Channel *)channel;
1014 whence = -1; /* Keep the compiler quiet */
1015 g_assert_not_reached ();
1018 tmp_offset = offset;
1019 if (tmp_offset != offset)
1021 g_set_error (err, G_IO_CHANNEL_ERROR,
1022 g_io_channel_error_from_errno (EINVAL),
1023 g_strerror (EINVAL));
1024 return G_IO_STATUS_ERROR;
1027 result = lseek (win32_channel->fd, tmp_offset, whence);
1031 g_set_error (err, G_IO_CHANNEL_ERROR,
1032 g_io_channel_error_from_errno (errno),
1033 g_strerror (errno));
1034 return G_IO_STATUS_ERROR;
1037 return G_IO_STATUS_NORMAL;
1041 g_io_win32_fd_close (GIOChannel *channel,
1044 GIOWin32Channel *win32_channel = (GIOWin32Channel *)channel;
1046 if (win32_channel->debug)
1047 g_print ("thread %#x: closing fd %d\n",
1048 win32_channel->thread_id,
1050 LOCK (win32_channel->mutex);
1051 if (win32_channel->running)
1053 if (win32_channel->debug)
1054 g_print ("thread %#x: running, marking fd %d for later close\n",
1055 win32_channel->thread_id, win32_channel->fd);
1056 win32_channel->running = FALSE;
1057 win32_channel->needs_close = TRUE;
1058 SetEvent (win32_channel->data_avail_event);
1062 if (win32_channel->debug)
1063 g_print ("closing fd %d\n", win32_channel->fd);
1064 close (win32_channel->fd);
1065 if (win32_channel->debug)
1066 g_print ("closed fd %d, setting to -1\n",
1068 win32_channel->fd = -1;
1070 UNLOCK (win32_channel->mutex);
1072 /* FIXME error detection? */
1074 return G_IO_STATUS_NORMAL;
1078 g_io_win32_fd_create_watch (GIOChannel *channel,
1079 GIOCondition condition)
1081 return g_io_win32_create_watch (channel, condition, read_thread);
1085 g_io_win32_sock_read (GIOChannel *channel,
1091 GIOWin32Channel *win32_channel = (GIOWin32Channel *)channel;
1093 GIOChannelError error = G_IO_STATUS_NORMAL;
1094 GIOStatus internal_status = G_IO_STATUS_NORMAL;
1095 char send_buffer[] = "sr";
1097 if (win32_channel->debug)
1098 g_print ("g_io_win32_sock_read: sockfd:%d count:%d\n",
1099 win32_channel->fd, count);
1100 #ifdef WE_NEED_TO_HANDLE_WSAEINTR
1103 result = recv (win32_channel->fd, buf, count, 0);
1105 if (win32_channel->debug)
1106 g_print ("g_io_win32_sock_read: recv:%d\n", result);
1108 if (result == SOCKET_ERROR)
1112 switch (WSAGetLastError ())
1115 error = G_IO_CHANNEL_ERROR_INVAL;
1117 case WSAEWOULDBLOCK:
1118 return G_IO_STATUS_AGAIN;
1119 #ifdef WE_NEED_TO_HANDLE_WSAEINTR /* not anymore with wsock2 ? */
1124 error = G_IO_CHANNEL_ERROR_FAILED;
1127 g_set_error (err, G_IO_CHANNEL_ERROR, error, "Socket read error");
1128 internal_status = G_IO_STATUS_ERROR;
1129 /* FIXME get all errors, better error messages */
1133 *bytes_read = result;
1135 internal_status = G_IO_STATUS_EOF;
1138 if ((internal_status == G_IO_STATUS_EOF) ||
1139 (internal_status == G_IO_STATUS_ERROR))
1141 LOCK (win32_channel->mutex);
1142 SetEvent (win32_channel->data_avail_noticed_event);
1143 win32_channel->needs_close = 1;
1144 send (win32_channel->reset_send, send_buffer, sizeof (send_buffer), 0);
1145 UNLOCK (win32_channel->mutex);
1147 return internal_status;
1151 g_io_win32_sock_write (GIOChannel *channel,
1154 gsize *bytes_written,
1157 GIOWin32Channel *win32_channel = (GIOWin32Channel *)channel;
1159 GIOChannelError error = G_IO_STATUS_NORMAL;
1160 char send_buffer[] = "sw";
1162 if (win32_channel->debug)
1163 g_print ("g_io_win32_sock_write: sockfd:%d count:%d\n",
1164 win32_channel->fd, count);
1165 #ifdef WE_NEED_TO_HANDLE_WSAEINTR
1168 result = send (win32_channel->fd, buf, count, 0);
1170 if (win32_channel->debug)
1171 g_print ("g_io_win32_sock_write: send:%d\n", result);
1173 if (result == SOCKET_ERROR)
1177 switch (WSAGetLastError ())
1180 error = G_IO_CHANNEL_ERROR_INVAL;
1182 case WSAEWOULDBLOCK:
1183 return G_IO_STATUS_AGAIN;
1184 #ifdef WE_NEED_TO_HANDLE_WSAEINTR /* not anymore with wsock2 ? */
1189 error = G_IO_CHANNEL_ERROR_FAILED;
1192 g_set_error (err, G_IO_CHANNEL_ERROR, error, "Socket write error");
1193 LOCK (win32_channel->mutex);
1194 SetEvent (win32_channel->data_avail_noticed_event);
1195 win32_channel->needs_close = 1;
1196 send (win32_channel->reset_send, send_buffer, sizeof (send_buffer), 0);
1197 UNLOCK (win32_channel->mutex);
1198 return G_IO_STATUS_ERROR;
1199 /* FIXME get all errors, better error messages */
1203 *bytes_written = result;
1205 return G_IO_STATUS_NORMAL;
1210 g_io_win32_sock_close (GIOChannel *channel,
1213 GIOWin32Channel *win32_channel = (GIOWin32Channel *)channel;
1215 LOCK (win32_channel->mutex);
1216 if (win32_channel->running)
1218 if (win32_channel->debug)
1219 g_print ("thread %#x: running, marking for later close\n",
1220 win32_channel->thread_id);
1221 win32_channel->running = FALSE;
1222 win32_channel->needs_close = TRUE;
1223 SetEvent(win32_channel->data_avail_noticed_event);
1225 if (win32_channel->fd != -1)
1227 if (win32_channel->debug)
1228 g_print ("thread %#x: closing socket %d\n",
1229 win32_channel->thread_id,
1232 closesocket (win32_channel->fd);
1233 win32_channel->fd = -1;
1235 UNLOCK (win32_channel->mutex);
1237 /* FIXME error detection? */
1239 return G_IO_STATUS_NORMAL;
1243 g_io_win32_sock_create_watch (GIOChannel *channel,
1244 GIOCondition condition)
1246 return g_io_win32_create_watch (channel, condition, select_thread);
1250 g_io_channel_new_file (const gchar *filename,
1254 int fid, flags, pmode;
1255 GIOChannel *channel;
1257 enum { /* Cheesy hack */
1264 g_return_val_if_fail (filename != NULL, NULL);
1265 g_return_val_if_fail (mode != NULL, NULL);
1266 g_return_val_if_fail ((error == NULL) || (*error == NULL), NULL);
1280 g_warning ("Invalid GIOFileMode %s.\n", mode);
1289 if (mode[2] == '\0')
1291 mode_num |= MODE_PLUS;
1296 g_warning ("Invalid GIOFileMode %s.\n", mode);
1307 flags = O_WRONLY | O_TRUNC | O_CREAT;
1311 flags = O_WRONLY | O_APPEND | O_CREAT;
1314 case MODE_R | MODE_PLUS:
1316 pmode = _S_IREAD | _S_IWRITE;
1318 case MODE_W | MODE_PLUS:
1319 flags = O_RDWR | O_TRUNC | O_CREAT;
1320 pmode = _S_IREAD | _S_IWRITE;
1322 case MODE_A | MODE_PLUS:
1323 flags = O_RDWR | O_APPEND | O_CREAT;
1324 pmode = _S_IREAD | _S_IWRITE;
1327 g_assert_not_reached ();
1332 /* always open 'untranslated' */
1333 fid = open (filename, flags | _O_BINARY, pmode);
1335 if (g_io_win32_get_debug_flag ())
1337 g_print ("g_io_channel_win32_new_file: open(\"%s\", ", filename);
1338 g_win32_print_access_mode (flags|_O_BINARY);
1339 g_print (",%#o)=%d\n", pmode, fid);
1344 g_set_error (error, G_FILE_ERROR,
1345 g_file_error_from_errno (errno),
1346 g_strerror (errno));
1347 return (GIOChannel *)NULL;
1350 channel = g_io_channel_win32_new_fd (fid);
1352 /* XXX: move this to g_io_channel_win32_new_fd () */
1353 channel->close_on_unref = TRUE;
1354 channel->is_seekable = TRUE;
1356 /* g_io_channel_win32_new_fd sets is_readable and is_writeable to
1357 * correspond to actual readability/writeability. Set to FALSE those
1358 * that mode doesn't allow
1363 channel->is_writeable = FALSE;
1367 channel->is_readable = FALSE;
1369 case MODE_R | MODE_PLUS:
1370 case MODE_W | MODE_PLUS:
1371 case MODE_A | MODE_PLUS:
1374 g_assert_not_reached ();
1381 g_io_win32_set_flags (GIOChannel *channel,
1385 GIOWin32Channel *win32_channel = (GIOWin32Channel *)channel;
1387 if (win32_channel->debug)
1389 g_print ("g_io_win32_set_flags: ");
1390 g_win32_print_gioflags (flags);
1394 g_warning ("g_io_win32_set_flags () not implemented.\n");
1396 return G_IO_STATUS_NORMAL;
1400 g_io_win32_fd_get_flags_internal (GIOChannel *channel,
1403 GIOWin32Channel *win32_channel = (GIOWin32Channel *) channel;
1407 if (st->st_mode & _S_IFIFO)
1409 channel->is_readable =
1410 (PeekNamedPipe ((HANDLE) _get_osfhandle (win32_channel->fd), &c, 0, &count, NULL, NULL) != 0) || GetLastError () == ERROR_BROKEN_PIPE;
1411 channel->is_writeable =
1412 (WriteFile ((HANDLE) _get_osfhandle (win32_channel->fd), &c, 0, &count, NULL) != 0);
1413 channel->is_seekable = FALSE;
1415 else if (st->st_mode & _S_IFCHR)
1417 /* XXX Seems there is no way to find out the readability of file
1418 * handles to device files (consoles, mostly) without doing a
1419 * blocking read. So punt, use st->st_mode.
1421 channel->is_readable = !!(st->st_mode & _S_IREAD);
1423 channel->is_writeable =
1424 (WriteFile ((HANDLE) _get_osfhandle (win32_channel->fd), &c, 0, &count, NULL) != 0);
1426 /* XXX What about devices that actually *are* seekable? But
1427 * those would probably not be handled using the C runtime
1428 * anyway, but using Windows-specific code.
1430 channel->is_seekable = FALSE;
1434 channel->is_readable =
1435 (ReadFile ((HANDLE) _get_osfhandle (win32_channel->fd), &c, 0, &count, NULL) != 0);
1436 channel->is_writeable =
1437 (WriteFile ((HANDLE) _get_osfhandle (win32_channel->fd), &c, 0, &count, NULL) != 0);
1438 channel->is_seekable = TRUE;
1441 /* XXX: G_IO_FLAG_APPEND */
1442 /* XXX: G_IO_FLAG_NONBLOCK */
1448 g_io_win32_fd_get_flags (GIOChannel *channel)
1451 GIOWin32Channel *win32_channel = (GIOWin32Channel *)channel;
1453 g_return_val_if_fail (win32_channel != NULL, 0);
1454 g_return_val_if_fail (win32_channel->type == G_IO_WIN32_FILE_DESC, 0);
1456 if (0 == fstat (win32_channel->fd, &st))
1457 return g_io_win32_fd_get_flags_internal (channel, &st);
1463 g_io_win32_msg_get_flags (GIOChannel *channel)
1469 g_io_win32_sock_get_flags (GIOChannel *channel)
1471 /* XXX Could do something here. */
1475 static GIOFuncs win32_channel_msg_funcs = {
1476 g_io_win32_msg_read,
1477 g_io_win32_msg_write,
1479 g_io_win32_msg_close,
1480 g_io_win32_msg_create_watch,
1482 g_io_win32_set_flags,
1483 g_io_win32_msg_get_flags,
1486 static GIOFuncs win32_channel_fd_funcs = {
1488 g_io_win32_fd_write,
1490 g_io_win32_fd_close,
1491 g_io_win32_fd_create_watch,
1493 g_io_win32_set_flags,
1494 g_io_win32_fd_get_flags,
1497 static GIOFuncs win32_channel_sock_funcs = {
1498 g_io_win32_sock_read,
1499 g_io_win32_sock_write,
1501 g_io_win32_sock_close,
1502 g_io_win32_sock_create_watch,
1504 g_io_win32_set_flags,
1505 g_io_win32_sock_get_flags,
1509 g_io_channel_win32_new_messages (guint hwnd)
1511 GIOWin32Channel *win32_channel = g_new (GIOWin32Channel, 1);
1512 GIOChannel *channel = (GIOChannel *)win32_channel;
1514 g_io_channel_init (channel);
1515 g_io_channel_win32_init (win32_channel);
1516 if (win32_channel->debug)
1517 g_print ("g_io_channel_win32_new_messages: hwnd = %ud\n", hwnd);
1518 channel->funcs = &win32_channel_msg_funcs;
1519 win32_channel->type = G_IO_WIN32_WINDOWS_MESSAGES;
1520 win32_channel->hwnd = (HWND) hwnd;
1522 /* XXX: check this. */
1523 channel->is_readable = IsWindow (win32_channel->hwnd);
1524 channel->is_writeable = IsWindow (win32_channel->hwnd);
1526 channel->is_seekable = FALSE;
1532 g_io_channel_win32_new_fd_internal (gint fd,
1535 GIOWin32Channel *win32_channel;
1536 GIOChannel *channel;
1538 win32_channel = g_new (GIOWin32Channel, 1);
1539 channel = (GIOChannel *)win32_channel;
1541 g_io_channel_init (channel);
1542 g_io_channel_win32_init (win32_channel);
1543 if (win32_channel->debug)
1544 g_print ("g_io_channel_win32_new_fd: %u\n", fd);
1545 channel->funcs = &win32_channel_fd_funcs;
1546 win32_channel->type = G_IO_WIN32_FILE_DESC;
1547 win32_channel->fd = fd;
1549 g_io_win32_fd_get_flags_internal (channel, st);
1555 g_io_channel_win32_new_fd (gint fd)
1559 if (fstat (fd, &st) == -1)
1561 g_warning (G_STRLOC ": %d isn't a C library file descriptor", fd);
1565 return g_io_channel_win32_new_fd_internal (fd, &st);
1569 g_io_channel_win32_get_fd (GIOChannel *channel)
1571 GIOWin32Channel *win32_channel = (GIOWin32Channel *)channel;
1573 return win32_channel->fd;
1577 g_io_channel_win32_new_socket (int socket)
1579 GIOWin32Channel *win32_channel = g_new (GIOWin32Channel, 1);
1580 GIOChannel *channel = (GIOChannel *)win32_channel;
1582 g_io_channel_init (channel);
1583 g_io_channel_win32_init (win32_channel);
1584 init_reset_sockets (win32_channel);
1585 if (win32_channel->debug)
1586 g_print ("g_io_channel_win32_new_socket: sockfd:%d\n", socket);
1587 channel->funcs = &win32_channel_sock_funcs;
1588 win32_channel->type = G_IO_WIN32_SOCKET;
1589 win32_channel->fd = socket;
1591 /* XXX: check this */
1592 channel->is_readable = TRUE;
1593 channel->is_writeable = TRUE;
1595 channel->is_seekable = FALSE;
1601 g_io_channel_unix_new (gint fd)
1603 gboolean is_fd, is_socket;
1607 is_fd = (fstat (fd, &st) == 0);
1609 optlen = sizeof (optval);
1610 is_socket = (getsockopt (fd, SOL_SOCKET, SO_TYPE, (char *) &optval, &optlen) != SOCKET_ERROR);
1612 if (is_fd && is_socket)
1613 g_warning (G_STRLOC ": %d is both a file descriptor and a socket, file descriptor interpretation assumed.", fd);
1616 return g_io_channel_win32_new_fd_internal (fd, &st);
1619 return g_io_channel_win32_new_socket(fd);
1621 g_warning (G_STRLOC ": %d is neither a file descriptor or a socket", fd);
1627 g_io_channel_unix_get_fd (GIOChannel *channel)
1629 return g_io_channel_win32_get_fd (channel);
1633 g_io_channel_win32_set_debug (GIOChannel *channel,
1636 GIOWin32Channel *win32_channel = (GIOWin32Channel *)channel;
1638 win32_channel->debug = flag;
1642 g_io_channel_win32_poll (GPollFD *fds,
1648 g_return_val_if_fail (n_fds >= 0, 0);
1650 result = (*g_main_context_get_poll_func (NULL)) (fds, n_fds, timeout);
1656 g_io_channel_win32_make_pollfd (GIOChannel *channel,
1657 GIOCondition condition,
1660 GIOWin32Channel *win32_channel = (GIOWin32Channel *)channel;
1662 if (win32_channel->data_avail_event == NULL)
1663 create_events (win32_channel);
1665 fd->fd = (gint) win32_channel->data_avail_event;
1666 fd->events = condition;
1668 if (win32_channel->thread_id == 0)
1670 if ((condition & G_IO_IN) && win32_channel->type == G_IO_WIN32_FILE_DESC)
1671 create_thread (win32_channel, condition, read_thread);
1672 else if (win32_channel->type == G_IO_WIN32_SOCKET)
1673 create_thread (win32_channel, condition, select_thread);
1677 /* Binary compatibility */
1679 g_io_channel_win32_new_stream_socket (int socket)
1681 return g_io_channel_win32_new_socket (socket);