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/.
33 * Bugs that are related to the code in this file:
35 * Bug 137968 - Sometimes a GIOFunc on Win32 is called with zero condition
36 * http://bugzilla.gnome.org/show_bug.cgi?id=137968
38 * Bug 324234 - Using g_io_add_watch_full() to wait for connect() to return on a non-blocking socket returns prematurely
39 * http://bugzilla.gnome.org/show_bug.cgi?id=324234
41 * Bug 331214 - g_io_channel async socket io stalls
42 * http://bugzilla.gnome.org/show_bug.cgi?id=331214
44 * Bug 338943 - Multiple watches on the same socket
45 * http://bugzilla.gnome.org/show_bug.cgi?id=338943
47 * Bug 357674 - 2 serious bugs in giowin32.c making glib iochannels useless
48 * http://bugzilla.gnome.org/show_bug.cgi?id=357674
50 * Bug 425156 - GIOChannel deadlocks on a win32 socket
51 * http://bugzilla.gnome.org/show_bug.cgi?id=425156
53 * Bug 468910 - giofunc condition=0
54 * http://bugzilla.gnome.org/show_bug.cgi?id=468910
56 * Bug 500246 - Bug fixes for giowin32
57 * http://bugzilla.gnome.org/show_bug.cgi?id=500246
59 * Bug 548278 - Async GETs connections are always terminated unexpectedly on windows
60 * http://bugzilla.gnome.org/show_bug.cgi?id=548278
62 * Bug 548536 - giowin32 problem when adding and removing watches
63 * http://bugzilla.gnome.org/show_bug.cgi?id=548536
65 * When fixing bugs related to the code in this file, either the above
66 * bugs or others, make sure that the test programs attached to the
67 * above bugs continue to work.
88 typedef struct _GIOWin32Channel GIOWin32Channel;
89 typedef struct _GIOWin32Watch GIOWin32Watch;
91 #define BUFFER_SIZE 4096
94 G_IO_WIN32_WINDOWS_MESSAGES, /* Windows messages */
96 G_IO_WIN32_FILE_DESC, /* Unix-like file descriptors from
97 * _open() or _pipe(), except for
98 * console IO. Separate thread to read
102 G_IO_WIN32_CONSOLE, /* Console IO (usually stdin, stdout, stderr) */
104 G_IO_WIN32_SOCKET /* Sockets. No separate thread. */
105 } GIOWin32ChannelType;
107 struct _GIOWin32Channel {
109 gint fd; /* Either a Unix-like file handle as provided
110 * by the Microsoft C runtime, or a SOCKET
111 * as provided by WinSock.
113 GIOWin32ChannelType type;
117 /* Field used by G_IO_WIN32_WINDOWS_MESSAGES channels */
118 HWND hwnd; /* Handle of window, or NULL */
120 /* Fields used by G_IO_WIN32_FILE_DESC channels. */
121 CRITICAL_SECTION mutex;
123 int direction; /* 0 means we read from it,
124 * 1 means we write to it.
127 gboolean running; /* Is reader or writer thread
128 * running. FALSE if EOF has been
129 * reached by the reader thread.
132 gboolean needs_close; /* If the channel has been closed while
133 * the reader thread was still running.
136 guint thread_id; /* If non-NULL the channel has or has
137 * had a reader or writer thread.
139 HANDLE data_avail_event;
143 /* Data is kept in a circular buffer. To be able to distinguish between
144 * empty and full buffers, we cannot fill it completely, but have to
145 * leave a one character gap.
147 * Data available is between indexes rdp and wrp-1 (modulo BUFFER_SIZE).
150 * Full: (wrp + 1) % BUFFER_SIZE == rdp
153 guchar *buffer; /* (Circular) buffer */
154 gint wrp, rdp; /* Buffer indices for writing and reading */
155 HANDLE space_avail_event;
157 /* Fields used by G_IO_WIN32_SOCKET channels */
161 gboolean write_would_have_blocked;
162 gboolean ever_writable;
165 struct _GIOWin32Watch {
169 GIOCondition condition;
173 g_win32_print_access_mode (int flags)
175 g_print ("%s%s%s%s%s%s%s%s%s%s",
176 ((flags & 0x3) == _O_RDWR ? "O_RDWR" :
177 ((flags & 0x3) == _O_RDONLY ? "O_RDONLY" :
178 ((flags & 0x3) == _O_WRONLY ? "O_WRONLY" : "0"))),
179 (flags & _O_APPEND ? "|O_APPEND" : ""),
180 (flags & _O_RANDOM ? "|O_RANDOM" : ""),
181 (flags & _O_SEQUENTIAL ? "|O_SEQUENTIAL" : ""),
182 (flags & _O_TEMPORARY ? "|O_TEMPORARY" : ""),
183 (flags & _O_CREAT ? "|O_CREAT" : ""),
184 (flags & _O_TRUNC ? "|O_TRUNC" : ""),
185 (flags & _O_EXCL ? "|O_EXCL" : ""),
186 (flags & _O_TEXT ? "|O_TEXT" : ""),
187 (flags & _O_BINARY ? "|O_BINARY" : ""));
191 g_win32_print_gioflags (GIOFlags flags)
195 if (flags & G_IO_FLAG_APPEND)
196 bar = "|", g_print ("APPEND");
197 if (flags & G_IO_FLAG_NONBLOCK)
198 g_print ("%sNONBLOCK", bar), bar = "|";
199 if (flags & G_IO_FLAG_IS_READABLE)
200 g_print ("%sREADABLE", bar), bar = "|";
201 if (flags & G_IO_FLAG_IS_WRITABLE)
202 g_print ("%sWRITABLE", bar), bar = "|";
203 if (flags & G_IO_FLAG_IS_SEEKABLE)
204 g_print ("%sSEEKABLE", bar), bar = "|";
208 event_mask_to_string (int mask)
211 int checked_bits = 0;
217 #define BIT(n) checked_bits |= FD_##n; if (mask & FD_##n) bufp += sprintf (bufp, "%s" #n, (bufp>buf ? "|" : ""))
227 BIT (ROUTING_INTERFACE_CHANGE);
228 BIT (ADDRESS_LIST_CHANGE);
232 if ((mask & ~checked_bits) != 0)
233 bufp += sprintf (bufp, "|%#x", mask & ~checked_bits);
235 return g_quark_to_string (g_quark_from_string (buf));
239 condition_to_string (GIOCondition condition)
242 int checked_bits = 0;
248 #define BIT(n) checked_bits |= G_IO_##n; if (condition & G_IO_##n) bufp += sprintf (bufp, "%s" #n, (bufp>buf ? "|" : ""))
259 if ((condition & ~checked_bits) != 0)
260 bufp += sprintf (bufp, "|%#x", condition & ~checked_bits);
262 return g_quark_to_string (g_quark_from_string (buf));
266 g_io_win32_get_debug_flag (void)
268 return (getenv ("G_IO_WIN32_DEBUG") != NULL);
272 g_io_channel_win32_init (GIOWin32Channel *channel)
274 channel->debug = g_io_win32_get_debug_flag ();
276 InitializeCriticalSection (&channel->mutex);
277 channel->running = FALSE;
278 channel->needs_close = FALSE;
279 channel->thread_id = 0;
280 channel->data_avail_event = NULL;
281 channel->revents = 0;
282 channel->buffer = NULL;
283 channel->space_avail_event = NULL;
285 channel->event_mask = 0;
286 channel->last_events = 0;
287 channel->event = NULL;
288 channel->write_would_have_blocked = FALSE;
289 channel->ever_writable = FALSE;
293 create_events (GIOWin32Channel *channel)
295 SECURITY_ATTRIBUTES sec_attrs;
297 sec_attrs.nLength = sizeof (SECURITY_ATTRIBUTES);
298 sec_attrs.lpSecurityDescriptor = NULL;
299 sec_attrs.bInheritHandle = FALSE;
301 /* The data available event is manual reset, the space available event
302 * is automatic reset.
304 if (!(channel->data_avail_event = CreateEvent (&sec_attrs, TRUE, FALSE, NULL))
305 || !(channel->space_avail_event = CreateEvent (&sec_attrs, FALSE, FALSE, NULL)))
307 gchar *emsg = g_win32_error_message (GetLastError ());
309 g_error ("Error creating event: %s", emsg);
314 static unsigned __stdcall
315 read_thread (void *parameter)
317 GIOWin32Channel *channel = parameter;
321 g_io_channel_ref ((GIOChannel *)channel);
324 g_print ("read_thread %#x: start fd=%d, data_avail=%p space_avail=%p\n",
327 channel->data_avail_event,
328 channel->space_avail_event);
330 channel->direction = 0;
331 channel->buffer = g_malloc (BUFFER_SIZE);
332 channel->rdp = channel->wrp = 0;
333 channel->running = TRUE;
335 SetEvent (channel->space_avail_event);
337 EnterCriticalSection (&channel->mutex);
338 while (channel->running)
341 g_print ("read_thread %#x: rdp=%d, wrp=%d\n",
342 channel->thread_id, channel->rdp, channel->wrp);
343 if ((channel->wrp + 1) % BUFFER_SIZE == channel->rdp)
347 g_print ("read_thread %#x: resetting space_avail\n",
349 ResetEvent (channel->space_avail_event);
351 g_print ("read_thread %#x: waiting for space\n",
353 LeaveCriticalSection (&channel->mutex);
354 WaitForSingleObject (channel->space_avail_event, INFINITE);
355 EnterCriticalSection (&channel->mutex);
357 g_print ("read_thread %#x: rdp=%d, wrp=%d\n",
358 channel->thread_id, channel->rdp, channel->wrp);
361 buffer = channel->buffer + channel->wrp;
363 /* Always leave at least one byte unused gap to be able to
364 * distinguish between the full and empty condition...
366 nbytes = MIN ((channel->rdp + BUFFER_SIZE - channel->wrp - 1) % BUFFER_SIZE,
367 BUFFER_SIZE - channel->wrp);
370 g_print ("read_thread %#x: calling read() for %d bytes\n",
371 channel->thread_id, nbytes);
373 LeaveCriticalSection (&channel->mutex);
375 nbytes = read (channel->fd, buffer, nbytes);
377 EnterCriticalSection (&channel->mutex);
379 channel->revents = G_IO_IN;
381 channel->revents |= G_IO_HUP;
383 channel->revents |= G_IO_ERR;
386 g_print ("read_thread %#x: read() returned %d, rdp=%d, wrp=%d\n",
387 channel->thread_id, nbytes, channel->rdp, channel->wrp);
392 channel->wrp = (channel->wrp + nbytes) % BUFFER_SIZE;
394 g_print ("read_thread %#x: rdp=%d, wrp=%d, setting data_avail\n",
395 channel->thread_id, channel->rdp, channel->wrp);
396 SetEvent (channel->data_avail_event);
399 channel->running = FALSE;
400 if (channel->needs_close)
403 g_print ("read_thread %#x: channel fd %d needs closing\n",
404 channel->thread_id, channel->fd);
410 g_print ("read_thread %#x: EOF, rdp=%d, wrp=%d, setting data_avail\n",
411 channel->thread_id, channel->rdp, channel->wrp);
412 SetEvent (channel->data_avail_event);
413 LeaveCriticalSection (&channel->mutex);
415 g_io_channel_unref ((GIOChannel *)channel);
417 /* No need to call _endthreadex(), the actual thread starter routine
418 * in MSVCRT (see crt/src/threadex.c:_threadstartex) calls
419 * _endthreadex() for us.
425 static unsigned __stdcall
426 write_thread (void *parameter)
428 GIOWin32Channel *channel = parameter;
432 g_io_channel_ref ((GIOChannel *)channel);
435 g_print ("write_thread %#x: start fd=%d, data_avail=%p space_avail=%p\n",
438 channel->data_avail_event,
439 channel->space_avail_event);
441 channel->direction = 1;
442 channel->buffer = g_malloc (BUFFER_SIZE);
443 channel->rdp = channel->wrp = 0;
444 channel->running = TRUE;
446 SetEvent (channel->space_avail_event);
448 /* We use the same event objects as for a reader thread, but with
449 * reversed meaning. So, space_avail is used if data is available
450 * for writing, and data_avail is used if space is available in the
454 EnterCriticalSection (&channel->mutex);
455 while (channel->running || channel->rdp != channel->wrp)
458 g_print ("write_thread %#x: rdp=%d, wrp=%d\n",
459 channel->thread_id, channel->rdp, channel->wrp);
460 if (channel->wrp == channel->rdp)
462 /* Buffer is empty. */
464 g_print ("write_thread %#x: resetting space_avail\n",
466 ResetEvent (channel->space_avail_event);
468 g_print ("write_thread %#x: waiting for data\n",
470 channel->revents = G_IO_OUT;
471 SetEvent (channel->data_avail_event);
472 LeaveCriticalSection (&channel->mutex);
473 WaitForSingleObject (channel->space_avail_event, INFINITE);
475 EnterCriticalSection (&channel->mutex);
476 if (channel->rdp == channel->wrp)
480 g_print ("write_thread %#x: rdp=%d, wrp=%d\n",
481 channel->thread_id, channel->rdp, channel->wrp);
484 buffer = channel->buffer + channel->rdp;
485 if (channel->rdp < channel->wrp)
486 nbytes = channel->wrp - channel->rdp;
488 nbytes = BUFFER_SIZE - channel->rdp;
491 g_print ("write_thread %#x: calling write() for %d bytes\n",
492 channel->thread_id, nbytes);
494 LeaveCriticalSection (&channel->mutex);
495 nbytes = write (channel->fd, buffer, nbytes);
496 EnterCriticalSection (&channel->mutex);
499 g_print ("write_thread %#x: write(%i) returned %d, rdp=%d, wrp=%d\n",
500 channel->thread_id, channel->fd, nbytes, channel->rdp, channel->wrp);
502 channel->revents = 0;
504 channel->revents |= G_IO_OUT;
505 else if (nbytes <= 0)
506 channel->revents |= G_IO_ERR;
508 channel->rdp = (channel->rdp + nbytes) % BUFFER_SIZE;
514 g_print ("write_thread: setting data_avail for thread %#x\n",
516 SetEvent (channel->data_avail_event);
519 channel->running = FALSE;
520 if (channel->needs_close)
523 g_print ("write_thread %#x: channel fd %d needs closing\n",
524 channel->thread_id, channel->fd);
529 LeaveCriticalSection (&channel->mutex);
531 g_io_channel_unref ((GIOChannel *)channel);
537 create_thread (GIOWin32Channel *channel,
538 GIOCondition condition,
539 unsigned (__stdcall *thread) (void *parameter))
541 HANDLE thread_handle;
543 thread_handle = (HANDLE) _beginthreadex (NULL, 0, thread, channel, 0,
544 &channel->thread_id);
545 if (thread_handle == 0)
546 g_warning ("Error creating thread: %s.",
548 else if (!CloseHandle (thread_handle))
550 gchar *emsg = g_win32_error_message (GetLastError ());
552 g_warning ("Error closing thread handle: %s.", emsg);
556 WaitForSingleObject (channel->space_avail_event, INFINITE);
560 buffer_read (GIOWin32Channel *channel,
569 EnterCriticalSection (&channel->mutex);
571 g_print ("reading from thread %#x %" G_GSIZE_FORMAT " bytes, rdp=%d, wrp=%d\n",
572 channel->thread_id, count, channel->rdp, channel->wrp);
574 if (channel->wrp == channel->rdp)
576 LeaveCriticalSection (&channel->mutex);
578 g_print ("waiting for data from thread %#x\n", channel->thread_id);
579 WaitForSingleObject (channel->data_avail_event, INFINITE);
581 g_print ("done waiting for data from thread %#x\n", channel->thread_id);
582 EnterCriticalSection (&channel->mutex);
583 if (channel->wrp == channel->rdp && !channel->running)
586 g_print ("wrp==rdp, !running\n");
587 LeaveCriticalSection (&channel->mutex);
589 return G_IO_STATUS_EOF;
593 if (channel->rdp < channel->wrp)
594 nbytes = channel->wrp - channel->rdp;
596 nbytes = BUFFER_SIZE - channel->rdp;
597 LeaveCriticalSection (&channel->mutex);
598 nbytes = MIN (left, nbytes);
600 g_print ("moving %d bytes from thread %#x\n",
601 nbytes, channel->thread_id);
602 memcpy (dest, channel->buffer + channel->rdp, nbytes);
605 EnterCriticalSection (&channel->mutex);
606 channel->rdp = (channel->rdp + nbytes) % BUFFER_SIZE;
608 g_print ("setting space_avail for thread %#x\n", channel->thread_id);
609 SetEvent (channel->space_avail_event);
611 g_print ("for thread %#x: rdp=%d, wrp=%d\n",
612 channel->thread_id, channel->rdp, channel->wrp);
613 if (channel->running && channel->wrp == channel->rdp)
616 g_print ("resetting data_avail of thread %#x\n",
618 ResetEvent (channel->data_avail_event);
620 LeaveCriticalSection (&channel->mutex);
622 /* We have no way to indicate any errors form the actual
623 * read() or recv() call in the reader thread. Should we have?
625 *bytes_read = count - left;
626 return (*bytes_read > 0) ? G_IO_STATUS_NORMAL : G_IO_STATUS_EOF;
631 buffer_write (GIOWin32Channel *channel,
634 gsize *bytes_written,
640 EnterCriticalSection (&channel->mutex);
642 g_print ("buffer_write: writing to thread %#x %" G_GSIZE_FORMAT " bytes, rdp=%d, wrp=%d\n",
643 channel->thread_id, count, channel->rdp, channel->wrp);
645 if ((channel->wrp + 1) % BUFFER_SIZE == channel->rdp)
649 g_print ("buffer_write: tid %#x: resetting data_avail\n",
651 ResetEvent (channel->data_avail_event);
653 g_print ("buffer_write: tid %#x: waiting for space\n",
655 LeaveCriticalSection (&channel->mutex);
656 WaitForSingleObject (channel->data_avail_event, INFINITE);
657 EnterCriticalSection (&channel->mutex);
659 g_print ("buffer_write: tid %#x: rdp=%d, wrp=%d\n",
660 channel->thread_id, channel->rdp, channel->wrp);
663 nbytes = MIN ((channel->rdp + BUFFER_SIZE - channel->wrp - 1) % BUFFER_SIZE,
664 BUFFER_SIZE - channel->wrp);
666 LeaveCriticalSection (&channel->mutex);
667 nbytes = MIN (left, nbytes);
669 g_print ("buffer_write: tid %#x: writing %d bytes\n",
670 channel->thread_id, nbytes);
671 memcpy (channel->buffer + channel->wrp, dest, nbytes);
674 EnterCriticalSection (&channel->mutex);
676 channel->wrp = (channel->wrp + nbytes) % BUFFER_SIZE;
678 g_print ("buffer_write: tid %#x: rdp=%d, wrp=%d, setting space_avail\n",
679 channel->thread_id, channel->rdp, channel->wrp);
680 SetEvent (channel->space_avail_event);
682 if ((channel->wrp + 1) % BUFFER_SIZE == channel->rdp)
686 g_print ("buffer_write: tid %#x: resetting data_avail\n",
688 ResetEvent (channel->data_avail_event);
691 LeaveCriticalSection (&channel->mutex);
693 /* We have no way to indicate any errors form the actual
694 * write() call in the writer thread. Should we have?
696 *bytes_written = count - left;
697 return (*bytes_written > 0) ? G_IO_STATUS_NORMAL : G_IO_STATUS_EOF;
702 g_io_win32_prepare (GSource *source,
705 GIOWin32Watch *watch = (GIOWin32Watch *)source;
706 GIOCondition buffer_condition = g_io_channel_get_buffer_condition (watch->channel);
707 GIOWin32Channel *channel = (GIOWin32Channel *)watch->channel;
713 g_print ("g_io_win32_prepare: source=%p channel=%p", source, channel);
715 switch (channel->type)
717 case G_IO_WIN32_WINDOWS_MESSAGES:
722 case G_IO_WIN32_CONSOLE:
727 case G_IO_WIN32_FILE_DESC:
729 g_print (" FD thread=%#x buffer_condition:{%s}"
730 "\n watch->pollfd.events:{%s} watch->pollfd.revents:{%s} channel->revents:{%s}",
731 channel->thread_id, condition_to_string (buffer_condition),
732 condition_to_string (watch->pollfd.events),
733 condition_to_string (watch->pollfd.revents),
734 condition_to_string (channel->revents));
736 EnterCriticalSection (&channel->mutex);
737 if (channel->running)
739 if (channel->direction == 0 && channel->wrp == channel->rdp)
742 g_print ("\n setting revents=0");
743 channel->revents = 0;
748 if (channel->direction == 1
749 && (channel->wrp + 1) % BUFFER_SIZE == channel->rdp)
752 g_print ("\n setting revents=0");
753 channel->revents = 0;
756 LeaveCriticalSection (&channel->mutex);
759 case G_IO_WIN32_SOCKET:
763 if (watch->condition & G_IO_IN)
764 event_mask |= (FD_READ | FD_ACCEPT);
765 if (watch->condition & G_IO_OUT)
766 event_mask |= (FD_WRITE | FD_CONNECT);
767 event_mask |= FD_CLOSE;
769 if (channel->event_mask != event_mask)
772 g_print ("\n WSAEventSelect(%d,%p,{%s})",
773 channel->fd, (HANDLE) watch->pollfd.fd,
774 event_mask_to_string (event_mask));
775 if (WSAEventSelect (channel->fd, (HANDLE) watch->pollfd.fd,
776 event_mask) == SOCKET_ERROR)
779 gchar *emsg = g_win32_error_message (WSAGetLastError ());
781 g_print (" failed: %s", emsg);
784 channel->event_mask = event_mask;
787 g_print ("\n setting last_events=0");
788 channel->last_events = 0;
790 if ((event_mask & FD_WRITE) &&
791 channel->ever_writable &&
792 !channel->write_would_have_blocked)
795 g_print (" WSASetEvent(%p)", (WSAEVENT) watch->pollfd.fd);
796 WSASetEvent ((WSAEVENT) watch->pollfd.fd);
802 g_assert_not_reached ();
808 return ((watch->condition & buffer_condition) == watch->condition);
812 g_io_win32_check (GSource *source)
815 GIOWin32Watch *watch = (GIOWin32Watch *)source;
816 GIOWin32Channel *channel = (GIOWin32Channel *)watch->channel;
817 GIOCondition buffer_condition = g_io_channel_get_buffer_condition (watch->channel);
818 WSANETWORKEVENTS events;
821 g_print ("g_io_win32_check: source=%p channel=%p", source, channel);
823 switch (channel->type)
825 case G_IO_WIN32_WINDOWS_MESSAGES:
828 return (PeekMessage (&msg, channel->hwnd, 0, 0, PM_NOREMOVE));
830 case G_IO_WIN32_FILE_DESC:
832 g_print (" FD thread=%#x buffer_condition=%s\n"
833 " watch->pollfd.events={%s} watch->pollfd.revents={%s} channel->revents={%s}\n",
834 channel->thread_id, condition_to_string (buffer_condition),
835 condition_to_string (watch->pollfd.events),
836 condition_to_string (watch->pollfd.revents),
837 condition_to_string (channel->revents));
839 watch->pollfd.revents = (watch->pollfd.events & channel->revents);
841 return ((watch->pollfd.revents | buffer_condition) & watch->condition);
843 case G_IO_WIN32_CONSOLE:
846 if (watch->channel->is_writeable)
848 else if (watch->channel->is_readable)
852 if (PeekConsoleInput ((HANDLE) watch->pollfd.fd, &buffer, 1, &n) &&
855 /* _kbhit() does quite complex processing to find out
856 * whether at least one of the key events pending corresponds
857 * to a "real" character that can be read.
862 /* Discard all other kinds of events */
863 ReadConsoleInput ((HANDLE) watch->pollfd.fd, &buffer, 1, &n);
868 case G_IO_WIN32_SOCKET:
871 if (channel->last_events & FD_WRITE)
874 g_print (" sock=%d event=%p last_events has FD_WRITE",
875 channel->fd, (HANDLE) watch->pollfd.fd);
879 WSAEnumNetworkEvents (channel->fd, 0, &events);
882 g_print ("\n revents={%s} condition={%s}"
883 "\n WSAEnumNetworkEvents(%d,0) sets events={%s}",
884 condition_to_string (watch->pollfd.revents),
885 condition_to_string (watch->condition),
887 event_mask_to_string (events.lNetworkEvents));
889 if (watch->pollfd.revents != 0 &&
890 events.lNetworkEvents == 0 &&
891 !(channel->event_mask & FD_WRITE))
893 channel->event_mask = 0;
895 g_print ("\n WSAEventSelect(%d,%p,{})",
896 channel->fd, (HANDLE) watch->pollfd.fd);
897 WSAEventSelect (channel->fd, (HANDLE) watch->pollfd.fd, 0);
899 g_print (" ResetEvent(%p)",
900 (HANDLE) watch->pollfd.fd);
901 ResetEvent ((HANDLE) watch->pollfd.fd);
903 else if (events.lNetworkEvents & FD_WRITE)
904 channel->ever_writable = TRUE;
905 channel->last_events = events.lNetworkEvents;
908 watch->pollfd.revents = 0;
909 if (channel->last_events & (FD_READ | FD_ACCEPT))
910 watch->pollfd.revents |= G_IO_IN;
912 if (channel->last_events & FD_WRITE)
913 watch->pollfd.revents |= G_IO_OUT;
916 /* We have called WSAEnumNetworkEvents() above but it didn't
919 if (events.lNetworkEvents & FD_CONNECT)
921 if (events.iErrorCode[FD_CONNECT_BIT] == 0)
922 watch->pollfd.revents |= G_IO_OUT;
924 watch->pollfd.revents |= (G_IO_HUP | G_IO_ERR);
926 if (watch->pollfd.revents == 0 && (channel->last_events & (FD_CLOSE)))
927 watch->pollfd.revents |= G_IO_HUP;
930 /* Regardless of WSAEnumNetworkEvents() result, if watching for
931 * writability, and if we have ever got a FD_WRITE event, and
932 * unless last write would have blocked, set G_IO_OUT. But never
933 * set both G_IO_OUT and G_IO_HUP.
935 if (!(watch->pollfd.revents & G_IO_HUP) &&
936 channel->ever_writable &&
937 !channel->write_would_have_blocked &&
938 (channel->event_mask & FD_WRITE))
939 watch->pollfd.revents |= G_IO_OUT;
942 g_print ("\n revents={%s} retval={%s}\n",
943 condition_to_string (watch->pollfd.revents),
944 condition_to_string ((watch->pollfd.revents | buffer_condition) & watch->condition));
946 return ((watch->pollfd.revents | buffer_condition) & watch->condition);
949 g_assert_not_reached ();
955 g_io_win32_dispatch (GSource *source,
956 GSourceFunc callback,
959 GIOFunc func = (GIOFunc)callback;
960 GIOWin32Watch *watch = (GIOWin32Watch *)source;
961 GIOWin32Channel *channel = (GIOWin32Channel *)watch->channel;
962 GIOCondition buffer_condition = g_io_channel_get_buffer_condition (watch->channel);
966 g_warning ("IO Watch dispatched without callback\n"
967 "You must call g_source_connect().");
972 g_print ("g_io_win32_dispatch: pollfd.revents=%s condition=%s result=%s\n",
973 condition_to_string (watch->pollfd.revents),
974 condition_to_string (watch->condition),
975 condition_to_string ((watch->pollfd.revents | buffer_condition) & watch->condition));
977 return (*func) (watch->channel,
978 (watch->pollfd.revents | buffer_condition) & watch->condition,
983 g_io_win32_finalize (GSource *source)
985 GIOWin32Watch *watch = (GIOWin32Watch *)source;
986 GIOWin32Channel *channel = (GIOWin32Channel *)watch->channel;
989 g_print ("g_io_win32_finalize: source=%p channel=%p", source, channel);
991 switch (channel->type)
993 case G_IO_WIN32_WINDOWS_MESSAGES:
998 case G_IO_WIN32_CONSOLE:
1003 case G_IO_WIN32_FILE_DESC:
1005 g_print (" FD thread=%#x", channel->thread_id);
1008 case G_IO_WIN32_SOCKET:
1010 g_print (" SOCK sock=%d", channel->fd);
1014 g_assert_not_reached ();
1019 g_io_channel_unref (watch->channel);
1022 GSourceFuncs g_io_watch_funcs = {
1025 g_io_win32_dispatch,
1030 g_io_win32_msg_read (GIOChannel *channel,
1036 GIOWin32Channel *win32_channel = (GIOWin32Channel *)channel;
1037 MSG msg; /* In case of alignment problems */
1039 if (count < sizeof (MSG))
1041 g_set_error_literal (err, G_IO_CHANNEL_ERROR, G_IO_CHANNEL_ERROR_INVAL,
1042 "Incorrect message size"); /* Informative enough error message? */
1043 return G_IO_STATUS_ERROR;
1046 if (win32_channel->debug)
1047 g_print ("g_io_win32_msg_read: channel=%p hwnd=%p\n",
1048 channel, win32_channel->hwnd);
1049 if (!PeekMessage (&msg, win32_channel->hwnd, 0, 0, PM_REMOVE))
1050 return G_IO_STATUS_AGAIN;
1052 memmove (buf, &msg, sizeof (MSG));
1053 *bytes_read = sizeof (MSG);
1055 return G_IO_STATUS_NORMAL;
1059 g_io_win32_msg_write (GIOChannel *channel,
1062 gsize *bytes_written,
1065 GIOWin32Channel *win32_channel = (GIOWin32Channel *)channel;
1068 if (count != sizeof (MSG))
1070 g_set_error_literal (err, G_IO_CHANNEL_ERROR, G_IO_CHANNEL_ERROR_INVAL,
1071 "Incorrect message size"); /* Informative enough error message? */
1072 return G_IO_STATUS_ERROR;
1075 /* In case of alignment problems */
1076 memmove (&msg, buf, sizeof (MSG));
1077 if (!PostMessage (win32_channel->hwnd, msg.message, msg.wParam, msg.lParam))
1079 gchar *emsg = g_win32_error_message (GetLastError ());
1081 g_set_error_literal (err, G_IO_CHANNEL_ERROR, G_IO_CHANNEL_ERROR_FAILED, emsg);
1084 return G_IO_STATUS_ERROR;
1087 *bytes_written = sizeof (MSG);
1089 return G_IO_STATUS_NORMAL;
1093 g_io_win32_msg_close (GIOChannel *channel,
1096 /* Nothing to be done. Or should we set hwnd to some invalid value? */
1098 return G_IO_STATUS_NORMAL;
1102 g_io_win32_free (GIOChannel *channel)
1104 GIOWin32Channel *win32_channel = (GIOWin32Channel *)channel;
1106 if (win32_channel->debug)
1107 g_print ("g_io_win32_free channel=%p fd=%d\n", channel, win32_channel->fd);
1109 DeleteCriticalSection (&win32_channel->mutex);
1111 if (win32_channel->data_avail_event)
1112 if (!CloseHandle (win32_channel->data_avail_event))
1113 if (win32_channel->debug)
1115 gchar *emsg = g_win32_error_message (GetLastError ());
1117 g_print (" CloseHandle(%p) failed: %s\n",
1118 win32_channel->data_avail_event, emsg);
1122 g_free (win32_channel->buffer);
1124 if (win32_channel->space_avail_event)
1125 if (!CloseHandle (win32_channel->space_avail_event))
1126 if (win32_channel->debug)
1128 gchar *emsg = g_win32_error_message (GetLastError ());
1130 g_print (" CloseHandle(%p) failed: %s\n",
1131 win32_channel->space_avail_event, emsg);
1135 if (win32_channel->type == G_IO_WIN32_SOCKET &&
1136 win32_channel->fd != -1)
1137 if (WSAEventSelect (win32_channel->fd, NULL, 0) == SOCKET_ERROR)
1138 if (win32_channel->debug)
1140 gchar *emsg = g_win32_error_message (WSAGetLastError ());
1142 g_print (" WSAEventSelect(%d,NULL,{}) failed: %s\n",
1143 win32_channel->fd, emsg);
1147 if (win32_channel->event)
1148 if (!WSACloseEvent (win32_channel->event))
1149 if (win32_channel->debug)
1151 gchar *emsg = g_win32_error_message (WSAGetLastError ());
1153 g_print (" WSACloseEvent(%p) failed: %s\n",
1154 win32_channel->event, emsg);
1158 g_free (win32_channel);
1162 g_io_win32_msg_create_watch (GIOChannel *channel,
1163 GIOCondition condition)
1165 GIOWin32Watch *watch;
1168 source = g_source_new (&g_io_watch_funcs, sizeof (GIOWin32Watch));
1169 g_source_set_name (source, "GIOChannel (Win32)");
1170 watch = (GIOWin32Watch *)source;
1172 watch->channel = channel;
1173 g_io_channel_ref (channel);
1175 watch->condition = condition;
1177 watch->pollfd.fd = (gintptr) G_WIN32_MSG_HANDLE;
1178 watch->pollfd.events = condition;
1180 g_source_add_poll (source, &watch->pollfd);
1186 g_io_win32_fd_and_console_read (GIOChannel *channel,
1192 GIOWin32Channel *win32_channel = (GIOWin32Channel *)channel;
1195 if (win32_channel->debug)
1196 g_print ("g_io_win32_fd_read: fd=%d count=%" G_GSIZE_FORMAT "\n",
1197 win32_channel->fd, count);
1199 if (win32_channel->thread_id)
1201 return buffer_read (win32_channel, buf, count, bytes_read, err);
1204 result = read (win32_channel->fd, buf, count);
1206 if (win32_channel->debug)
1207 g_print ("g_io_win32_fd_read: read() => %d\n", result);
1217 return G_IO_STATUS_AGAIN;
1220 g_set_error_literal (err, G_IO_CHANNEL_ERROR,
1221 g_io_channel_error_from_errno (errno),
1222 g_strerror (errno));
1223 return G_IO_STATUS_ERROR;
1227 *bytes_read = result;
1229 return (result > 0) ? G_IO_STATUS_NORMAL : G_IO_STATUS_EOF;
1233 g_io_win32_fd_and_console_write (GIOChannel *channel,
1236 gsize *bytes_written,
1239 GIOWin32Channel *win32_channel = (GIOWin32Channel *)channel;
1242 if (win32_channel->thread_id)
1244 return buffer_write (win32_channel, buf, count, bytes_written, err);
1247 result = write (win32_channel->fd, buf, count);
1248 if (win32_channel->debug)
1249 g_print ("g_io_win32_fd_write: fd=%d count=%" G_GSIZE_FORMAT " => %d\n",
1250 win32_channel->fd, count, result);
1260 return G_IO_STATUS_AGAIN;
1263 g_set_error_literal (err, G_IO_CHANNEL_ERROR,
1264 g_io_channel_error_from_errno (errno),
1265 g_strerror (errno));
1266 return G_IO_STATUS_ERROR;
1270 *bytes_written = result;
1272 return G_IO_STATUS_NORMAL;
1276 g_io_win32_fd_seek (GIOChannel *channel,
1281 GIOWin32Channel *win32_channel = (GIOWin32Channel *)channel;
1298 whence = -1; /* Keep the compiler quiet */
1299 g_assert_not_reached ();
1303 tmp_offset = offset;
1304 if (tmp_offset != offset)
1306 g_set_error_literal (err, G_IO_CHANNEL_ERROR,
1307 g_io_channel_error_from_errno (EINVAL),
1308 g_strerror (EINVAL));
1309 return G_IO_STATUS_ERROR;
1312 result = lseek (win32_channel->fd, tmp_offset, whence);
1316 g_set_error_literal (err, G_IO_CHANNEL_ERROR,
1317 g_io_channel_error_from_errno (errno),
1318 g_strerror (errno));
1319 return G_IO_STATUS_ERROR;
1322 return G_IO_STATUS_NORMAL;
1326 g_io_win32_fd_close (GIOChannel *channel,
1329 GIOWin32Channel *win32_channel = (GIOWin32Channel *)channel;
1331 if (win32_channel->debug)
1332 g_print ("g_io_win32_fd_close: thread=%#x: fd=%d\n",
1333 win32_channel->thread_id,
1335 EnterCriticalSection (&win32_channel->mutex);
1336 if (win32_channel->running)
1338 if (win32_channel->debug)
1339 g_print ("thread %#x: running, marking fd %d for later close\n",
1340 win32_channel->thread_id, win32_channel->fd);
1341 win32_channel->running = FALSE;
1342 win32_channel->needs_close = TRUE;
1343 if (win32_channel->direction == 0)
1344 SetEvent (win32_channel->data_avail_event);
1346 SetEvent (win32_channel->space_avail_event);
1350 if (win32_channel->debug)
1351 g_print ("closing fd %d\n", win32_channel->fd);
1352 close (win32_channel->fd);
1353 if (win32_channel->debug)
1354 g_print ("closed fd %d, setting to -1\n",
1356 win32_channel->fd = -1;
1358 LeaveCriticalSection (&win32_channel->mutex);
1360 /* FIXME error detection? */
1362 return G_IO_STATUS_NORMAL;
1366 g_io_win32_fd_create_watch (GIOChannel *channel,
1367 GIOCondition condition)
1369 GIOWin32Channel *win32_channel = (GIOWin32Channel *)channel;
1370 GSource *source = g_source_new (&g_io_watch_funcs, sizeof (GIOWin32Watch));
1371 GIOWin32Watch *watch = (GIOWin32Watch *)source;
1373 watch->channel = channel;
1374 g_io_channel_ref (channel);
1376 watch->condition = condition;
1378 if (win32_channel->data_avail_event == NULL)
1379 create_events (win32_channel);
1381 watch->pollfd.fd = (gintptr) win32_channel->data_avail_event;
1382 watch->pollfd.events = condition;
1384 if (win32_channel->debug)
1385 g_print ("g_io_win32_fd_create_watch: channel=%p fd=%d condition={%s} event=%p\n",
1386 channel, win32_channel->fd,
1387 condition_to_string (condition), (HANDLE) watch->pollfd.fd);
1389 EnterCriticalSection (&win32_channel->mutex);
1390 if (win32_channel->thread_id == 0)
1392 if (condition & G_IO_IN)
1393 create_thread (win32_channel, condition, read_thread);
1394 else if (condition & G_IO_OUT)
1395 create_thread (win32_channel, condition, write_thread);
1398 g_source_add_poll (source, &watch->pollfd);
1399 LeaveCriticalSection (&win32_channel->mutex);
1405 g_io_win32_console_close (GIOChannel *channel,
1408 GIOWin32Channel *win32_channel = (GIOWin32Channel *)channel;
1410 if (close (win32_channel->fd) < 0)
1412 g_set_error_literal (err, G_IO_CHANNEL_ERROR,
1413 g_io_channel_error_from_errno (errno),
1414 g_strerror (errno));
1415 return G_IO_STATUS_ERROR;
1418 return G_IO_STATUS_NORMAL;
1422 g_io_win32_console_create_watch (GIOChannel *channel,
1423 GIOCondition condition)
1425 GIOWin32Channel *win32_channel = (GIOWin32Channel *)channel;
1426 GSource *source = g_source_new (&g_io_watch_funcs, sizeof (GIOWin32Watch));
1427 GIOWin32Watch *watch = (GIOWin32Watch *)source;
1429 watch->channel = channel;
1430 g_io_channel_ref (channel);
1432 watch->condition = condition;
1434 watch->pollfd.fd = _get_osfhandle (win32_channel->fd);
1435 watch->pollfd.events = condition;
1437 g_source_add_poll (source, &watch->pollfd);
1443 g_io_win32_sock_read (GIOChannel *channel,
1449 GIOWin32Channel *win32_channel = (GIOWin32Channel *)channel;
1451 GIOChannelError error;
1454 if (win32_channel->debug)
1455 g_print ("g_io_win32_sock_read: channel=%p sock=%d count=%" G_GSIZE_FORMAT,
1456 channel, win32_channel->fd, count);
1458 result = recv (win32_channel->fd, buf, count, 0);
1459 if (result == SOCKET_ERROR)
1460 winsock_error = WSAGetLastError ();
1462 if (win32_channel->debug)
1463 g_print (" recv=%d", result);
1465 if (result == SOCKET_ERROR)
1467 gchar *emsg = g_win32_error_message (winsock_error);
1469 if (win32_channel->debug)
1470 g_print (" %s\n", emsg);
1474 switch (winsock_error)
1477 error = G_IO_CHANNEL_ERROR_INVAL;
1479 case WSAEWOULDBLOCK:
1481 return G_IO_STATUS_AGAIN;
1483 error = G_IO_CHANNEL_ERROR_FAILED;
1486 g_set_error_literal (err, G_IO_CHANNEL_ERROR, error, emsg);
1489 return G_IO_STATUS_ERROR;
1493 if (win32_channel->debug)
1495 *bytes_read = result;
1497 return G_IO_STATUS_EOF;
1499 return G_IO_STATUS_NORMAL;
1504 g_io_win32_sock_write (GIOChannel *channel,
1507 gsize *bytes_written,
1510 GIOWin32Channel *win32_channel = (GIOWin32Channel *)channel;
1512 GIOChannelError error;
1515 if (win32_channel->debug)
1516 g_print ("g_io_win32_sock_write: channel=%p sock=%d count=%" G_GSIZE_FORMAT,
1517 channel, win32_channel->fd, count);
1519 result = send (win32_channel->fd, buf, count, 0);
1520 if (result == SOCKET_ERROR)
1521 winsock_error = WSAGetLastError ();
1523 if (win32_channel->debug)
1524 g_print (" send=%d", result);
1526 if (result == SOCKET_ERROR)
1528 gchar *emsg = g_win32_error_message (winsock_error);
1530 if (win32_channel->debug)
1531 g_print (" %s\n", emsg);
1535 switch (winsock_error)
1538 error = G_IO_CHANNEL_ERROR_INVAL;
1540 case WSAEWOULDBLOCK:
1541 win32_channel->write_would_have_blocked = TRUE;
1542 win32_channel->last_events = 0;
1544 return G_IO_STATUS_AGAIN;
1546 error = G_IO_CHANNEL_ERROR_FAILED;
1549 g_set_error_literal (err, G_IO_CHANNEL_ERROR, error, emsg);
1552 return G_IO_STATUS_ERROR;
1556 if (win32_channel->debug)
1558 *bytes_written = result;
1559 win32_channel->write_would_have_blocked = FALSE;
1561 return G_IO_STATUS_NORMAL;
1566 g_io_win32_sock_close (GIOChannel *channel,
1569 GIOWin32Channel *win32_channel = (GIOWin32Channel *)channel;
1571 if (win32_channel->fd != -1)
1573 if (win32_channel->debug)
1574 g_print ("g_io_win32_sock_close: channel=%p sock=%d\n",
1575 channel, win32_channel->fd);
1577 closesocket (win32_channel->fd);
1578 win32_channel->fd = -1;
1581 /* FIXME error detection? */
1583 return G_IO_STATUS_NORMAL;
1587 g_io_win32_sock_create_watch (GIOChannel *channel,
1588 GIOCondition condition)
1590 GIOWin32Channel *win32_channel = (GIOWin32Channel *)channel;
1591 GSource *source = g_source_new (&g_io_watch_funcs, sizeof (GIOWin32Watch));
1592 GIOWin32Watch *watch = (GIOWin32Watch *)source;
1594 watch->channel = channel;
1595 g_io_channel_ref (channel);
1597 watch->condition = condition;
1599 if (win32_channel->event == 0)
1600 win32_channel->event = WSACreateEvent ();
1602 watch->pollfd.fd = (gintptr) win32_channel->event;
1603 watch->pollfd.events = condition;
1605 if (win32_channel->debug)
1606 g_print ("g_io_win32_sock_create_watch: channel=%p sock=%d event=%p condition={%s}\n",
1607 channel, win32_channel->fd, (HANDLE) watch->pollfd.fd,
1608 condition_to_string (watch->condition));
1610 g_source_add_poll (source, &watch->pollfd);
1616 g_io_channel_new_file (const gchar *filename,
1620 int fid, flags, pmode;
1621 GIOChannel *channel;
1623 enum { /* Cheesy hack */
1631 g_return_val_if_fail (filename != NULL, NULL);
1632 g_return_val_if_fail (mode != NULL, NULL);
1633 g_return_val_if_fail ((error == NULL) || (*error == NULL), NULL);
1647 g_warning ("Invalid GIOFileMode %s.", mode);
1656 if (mode[2] == '\0')
1658 mode_num |= MODE_PLUS;
1663 g_warning ("Invalid GIOFileMode %s.", mode);
1674 flags = O_WRONLY | O_TRUNC | O_CREAT;
1678 flags = O_WRONLY | O_APPEND | O_CREAT;
1681 case MODE_R | MODE_PLUS:
1683 pmode = _S_IREAD | _S_IWRITE;
1685 case MODE_W | MODE_PLUS:
1686 flags = O_RDWR | O_TRUNC | O_CREAT;
1687 pmode = _S_IREAD | _S_IWRITE;
1689 case MODE_A | MODE_PLUS:
1690 flags = O_RDWR | O_APPEND | O_CREAT;
1691 pmode = _S_IREAD | _S_IWRITE;
1694 g_assert_not_reached ();
1698 /* always open 'untranslated' */
1699 fid = g_open (filename, flags | _O_BINARY, pmode);
1701 if (g_io_win32_get_debug_flag ())
1703 g_print ("g_io_channel_win32_new_file: open(\"%s\",", filename);
1704 g_win32_print_access_mode (flags|_O_BINARY);
1705 g_print (",%#o)=%d\n", pmode, fid);
1710 g_set_error_literal (error, G_FILE_ERROR,
1711 g_file_error_from_errno (errno),
1712 g_strerror (errno));
1713 return (GIOChannel *)NULL;
1716 channel = g_io_channel_win32_new_fd (fid);
1718 /* XXX: move this to g_io_channel_win32_new_fd () */
1719 channel->close_on_unref = TRUE;
1720 channel->is_seekable = TRUE;
1722 /* g_io_channel_win32_new_fd sets is_readable and is_writeable to
1723 * correspond to actual readability/writeability. Set to FALSE those
1724 * that mode doesn't allow
1729 channel->is_writeable = FALSE;
1733 channel->is_readable = FALSE;
1735 case MODE_R | MODE_PLUS:
1736 case MODE_W | MODE_PLUS:
1737 case MODE_A | MODE_PLUS:
1740 g_assert_not_reached ();
1747 #if !defined (_WIN64)
1749 #undef g_io_channel_new_file
1751 /* Binary compatibility version. Not for newly compiled code. */
1754 g_io_channel_new_file (const gchar *filename,
1758 gchar *utf8_filename = g_locale_to_utf8 (filename, -1, NULL, NULL, error);
1761 if (utf8_filename == NULL)
1764 retval = g_io_channel_new_file_utf8 (utf8_filename, mode, error);
1766 g_free (utf8_filename);
1774 g_io_win32_unimpl_set_flags (GIOChannel *channel,
1778 GIOWin32Channel *win32_channel = (GIOWin32Channel *)channel;
1780 if (win32_channel->debug)
1782 g_print ("g_io_win32_unimpl_set_flags: ");
1783 g_win32_print_gioflags (flags);
1787 g_set_error_literal (err, G_IO_CHANNEL_ERROR,
1788 G_IO_CHANNEL_ERROR_FAILED,
1789 "Not implemented on Win32");
1791 return G_IO_STATUS_ERROR;
1795 g_io_win32_fd_get_flags_internal (GIOChannel *channel,
1796 struct _stati64 *st)
1798 GIOWin32Channel *win32_channel = (GIOWin32Channel *) channel;
1802 if (st->st_mode & _S_IFIFO)
1804 channel->is_readable =
1805 (PeekNamedPipe ((HANDLE) _get_osfhandle (win32_channel->fd), &c, 0, &count, NULL, NULL) != 0) || GetLastError () == ERROR_BROKEN_PIPE;
1806 channel->is_writeable =
1807 (WriteFile ((HANDLE) _get_osfhandle (win32_channel->fd), &c, 0, &count, NULL) != 0);
1808 channel->is_seekable = FALSE;
1812 channel->is_readable =
1813 (ReadFile ((HANDLE) _get_osfhandle (win32_channel->fd), &c, 0, &count, NULL) != 0);
1814 channel->is_writeable =
1815 (WriteFile ((HANDLE) _get_osfhandle (win32_channel->fd), &c, 0, &count, NULL) != 0);
1816 channel->is_seekable = TRUE;
1819 /* XXX: G_IO_FLAG_APPEND */
1820 /* XXX: G_IO_FLAG_NONBLOCK */
1826 g_io_win32_fd_get_flags (GIOChannel *channel)
1829 GIOWin32Channel *win32_channel = (GIOWin32Channel *)channel;
1831 g_return_val_if_fail (win32_channel != NULL, 0);
1832 g_return_val_if_fail (win32_channel->type == G_IO_WIN32_FILE_DESC, 0);
1834 if (0 == _fstati64 (win32_channel->fd, &st))
1835 return g_io_win32_fd_get_flags_internal (channel, &st);
1841 g_io_win32_console_get_flags_internal (GIOChannel *channel)
1843 GIOWin32Channel *win32_channel = (GIOWin32Channel *) channel;
1844 HANDLE handle = (HANDLE) _get_osfhandle (win32_channel->fd);
1847 INPUT_RECORD record;
1849 channel->is_readable = PeekConsoleInput (handle, &record, 1, &count);
1850 channel->is_writeable = WriteFile (handle, &c, 0, &count, NULL);
1851 channel->is_seekable = FALSE;
1857 g_io_win32_console_get_flags (GIOChannel *channel)
1859 GIOWin32Channel *win32_channel = (GIOWin32Channel *)channel;
1861 g_return_val_if_fail (win32_channel != NULL, 0);
1862 g_return_val_if_fail (win32_channel->type == G_IO_WIN32_CONSOLE, 0);
1864 return g_io_win32_console_get_flags_internal (channel);
1868 g_io_win32_msg_get_flags (GIOChannel *channel)
1874 g_io_win32_sock_set_flags (GIOChannel *channel,
1878 GIOWin32Channel *win32_channel = (GIOWin32Channel *)channel;
1881 if (win32_channel->debug)
1883 g_print ("g_io_win32_sock_set_flags: ");
1884 g_win32_print_gioflags (flags);
1888 if (flags & G_IO_FLAG_NONBLOCK)
1891 if (ioctlsocket (win32_channel->fd, FIONBIO, &arg) == SOCKET_ERROR)
1893 gchar *emsg = g_win32_error_message (WSAGetLastError ());
1895 g_set_error_literal (err, G_IO_CHANNEL_ERROR,
1896 G_IO_CHANNEL_ERROR_FAILED,
1900 return G_IO_STATUS_ERROR;
1906 if (ioctlsocket (win32_channel->fd, FIONBIO, &arg) == SOCKET_ERROR)
1908 gchar *emsg = g_win32_error_message (WSAGetLastError ());
1910 g_set_error_literal (err, G_IO_CHANNEL_ERROR,
1911 G_IO_CHANNEL_ERROR_FAILED,
1915 return G_IO_STATUS_ERROR;
1919 return G_IO_STATUS_NORMAL;
1923 g_io_win32_sock_get_flags (GIOChannel *channel)
1925 /* Could we do something here? */
1929 static GIOFuncs win32_channel_msg_funcs = {
1930 g_io_win32_msg_read,
1931 g_io_win32_msg_write,
1933 g_io_win32_msg_close,
1934 g_io_win32_msg_create_watch,
1936 g_io_win32_unimpl_set_flags,
1937 g_io_win32_msg_get_flags,
1940 static GIOFuncs win32_channel_fd_funcs = {
1941 g_io_win32_fd_and_console_read,
1942 g_io_win32_fd_and_console_write,
1944 g_io_win32_fd_close,
1945 g_io_win32_fd_create_watch,
1947 g_io_win32_unimpl_set_flags,
1948 g_io_win32_fd_get_flags,
1951 static GIOFuncs win32_channel_console_funcs = {
1952 g_io_win32_fd_and_console_read,
1953 g_io_win32_fd_and_console_write,
1955 g_io_win32_console_close,
1956 g_io_win32_console_create_watch,
1958 g_io_win32_unimpl_set_flags,
1959 g_io_win32_console_get_flags,
1962 static GIOFuncs win32_channel_sock_funcs = {
1963 g_io_win32_sock_read,
1964 g_io_win32_sock_write,
1966 g_io_win32_sock_close,
1967 g_io_win32_sock_create_watch,
1969 g_io_win32_sock_set_flags,
1970 g_io_win32_sock_get_flags,
1974 * g_io_channel_win32_new_messages:
1975 * @hwnd: a window handle.
1977 * Creates a new #GIOChannel given a window handle on Windows.
1979 * This function creates a #GIOChannel that can be used to poll for
1980 * Windows messages for the window in question.
1982 * Returns: a new #GIOChannel.
1985 #if GLIB_SIZEOF_VOID_P == 8
1986 g_io_channel_win32_new_messages (gsize hwnd)
1988 g_io_channel_win32_new_messages (guint hwnd)
1991 GIOWin32Channel *win32_channel = g_new (GIOWin32Channel, 1);
1992 GIOChannel *channel = (GIOChannel *)win32_channel;
1994 g_io_channel_init (channel);
1995 g_io_channel_win32_init (win32_channel);
1996 if (win32_channel->debug)
1997 g_print ("g_io_channel_win32_new_messages: channel=%p hwnd=%p\n",
1998 channel, (HWND) hwnd);
1999 channel->funcs = &win32_channel_msg_funcs;
2000 win32_channel->type = G_IO_WIN32_WINDOWS_MESSAGES;
2001 win32_channel->hwnd = (HWND) hwnd;
2003 /* XXX: check this. */
2004 channel->is_readable = IsWindow (win32_channel->hwnd);
2005 channel->is_writeable = IsWindow (win32_channel->hwnd);
2007 channel->is_seekable = FALSE;
2013 g_io_channel_win32_new_fd_internal (gint fd,
2014 struct _stati64 *st)
2016 GIOWin32Channel *win32_channel;
2017 GIOChannel *channel;
2019 win32_channel = g_new (GIOWin32Channel, 1);
2020 channel = (GIOChannel *)win32_channel;
2022 g_io_channel_init (channel);
2023 g_io_channel_win32_init (win32_channel);
2025 win32_channel->fd = fd;
2027 if (win32_channel->debug)
2028 g_print ("g_io_channel_win32_new_fd: channel=%p fd=%u\n",
2031 if (st->st_mode & _S_IFCHR) /* console */
2033 channel->funcs = &win32_channel_console_funcs;
2034 win32_channel->type = G_IO_WIN32_CONSOLE;
2035 g_io_win32_console_get_flags_internal (channel);
2039 channel->funcs = &win32_channel_fd_funcs;
2040 win32_channel->type = G_IO_WIN32_FILE_DESC;
2041 g_io_win32_fd_get_flags_internal (channel, st);
2048 * g_io_channel_win32_new_fd:
2049 * @fd: a C library file descriptor.
2051 * Creates a new #GIOChannel given a file descriptor on Windows. This
2052 * works for file descriptors from the C runtime.
2054 * This function works for file descriptors as returned by the open(),
2055 * creat(), pipe() and fileno() calls in the Microsoft C runtime. In
2056 * order to meaningfully use this function your code should use the
2057 * same C runtime as GLib uses, which is msvcrt.dll. Note that in
2058 * current Microsoft compilers it is near impossible to convince it to
2059 * build code that would use msvcrt.dll. The last Microsoft compiler
2060 * version that supported using msvcrt.dll as the C runtime was version
2061 * 6. The GNU compiler and toolchain for Windows, also known as Mingw,
2062 * fully supports msvcrt.dll.
2064 * If you have created a #GIOChannel for a file descriptor and started
2065 * watching (polling) it, you shouldn't call read() on the file
2066 * descriptor. This is because adding polling for a file descriptor is
2067 * implemented in GLib on Windows by starting a thread that sits
2068 * blocked in a read() from the file descriptor most of the time. All
2069 * reads from the file descriptor should be done by this internal GLib
2070 * thread. Your code should call only g_io_channel_read().
2072 * This function is available only in GLib on Windows.
2074 * Returns: a new #GIOChannel.
2077 g_io_channel_win32_new_fd (gint fd)
2081 if (_fstati64 (fd, &st) == -1)
2083 g_warning ("g_io_channel_win32_new_fd: %d isn't an open file descriptor in the C library GLib uses.", fd);
2087 return g_io_channel_win32_new_fd_internal (fd, &st);
2091 g_io_channel_win32_get_fd (GIOChannel *channel)
2093 GIOWin32Channel *win32_channel = (GIOWin32Channel *)channel;
2095 return win32_channel->fd;
2099 * g_io_channel_win32_new_socket:
2100 * @socket: a Winsock socket
2102 * Creates a new #GIOChannel given a socket on Windows.
2104 * This function works for sockets created by Winsock. It's available
2105 * only in GLib on Windows.
2107 * Polling a #GSource created to watch a channel for a socket puts the
2108 * socket in non-blocking mode. This is a side-effect of the
2109 * implementation and unavoidable.
2111 * Returns: a new #GIOChannel
2114 g_io_channel_win32_new_socket (int socket)
2116 GIOWin32Channel *win32_channel = g_new (GIOWin32Channel, 1);
2117 GIOChannel *channel = (GIOChannel *)win32_channel;
2119 g_io_channel_init (channel);
2120 g_io_channel_win32_init (win32_channel);
2121 if (win32_channel->debug)
2122 g_print ("g_io_channel_win32_new_socket: channel=%p sock=%d\n",
2124 channel->funcs = &win32_channel_sock_funcs;
2125 win32_channel->type = G_IO_WIN32_SOCKET;
2126 win32_channel->fd = socket;
2128 channel->is_readable = TRUE;
2129 channel->is_writeable = TRUE;
2130 channel->is_seekable = FALSE;
2136 g_io_channel_unix_new (gint fd)
2138 gboolean is_fd, is_socket;
2142 is_fd = (_fstati64 (fd, &st) == 0);
2144 optlen = sizeof (optval);
2145 is_socket = (getsockopt (fd, SOL_SOCKET, SO_TYPE, (char *) &optval, &optlen) != SOCKET_ERROR);
2147 if (is_fd && is_socket)
2148 g_warning ("g_io_channel_unix_new: %d is both a file descriptor and a socket. File descriptor interpretation assumed. To avoid ambiguity, call either g_io_channel_win32_new_fd() or g_io_channel_win32_new_socket() instead.", fd);
2151 return g_io_channel_win32_new_fd_internal (fd, &st);
2154 return g_io_channel_win32_new_socket(fd);
2156 g_warning ("g_io_channel_unix_new: %d is neither a file descriptor or a socket.", fd);
2162 g_io_channel_unix_get_fd (GIOChannel *channel)
2164 return g_io_channel_win32_get_fd (channel);
2168 g_io_channel_win32_set_debug (GIOChannel *channel,
2171 GIOWin32Channel *win32_channel = (GIOWin32Channel *)channel;
2173 win32_channel->debug = flag;
2177 g_io_channel_win32_poll (GPollFD *fds,
2181 g_return_val_if_fail (n_fds >= 0, 0);
2183 return g_poll (fds, n_fds, timeout);
2187 g_io_channel_win32_make_pollfd (GIOChannel *channel,
2188 GIOCondition condition,
2191 GIOWin32Channel *win32_channel = (GIOWin32Channel *)channel;
2193 switch (win32_channel->type)
2195 case G_IO_WIN32_FILE_DESC:
2196 if (win32_channel->data_avail_event == NULL)
2197 create_events (win32_channel);
2199 fd->fd = (gintptr) win32_channel->data_avail_event;
2201 if (win32_channel->thread_id == 0)
2203 /* Is it meaningful for a file descriptor to be polled for
2204 * both IN and OUT? For what kind of file descriptor would
2205 * that be? Doesn't seem to make sense, in practise the file
2206 * descriptors handled here are always read or write ends of
2207 * pipes surely, and thus unidirectional.
2209 if (condition & G_IO_IN)
2210 create_thread (win32_channel, condition, read_thread);
2211 else if (condition & G_IO_OUT)
2212 create_thread (win32_channel, condition, write_thread);
2216 case G_IO_WIN32_CONSOLE:
2217 fd->fd = _get_osfhandle (win32_channel->fd);
2220 case G_IO_WIN32_SOCKET:
2221 fd->fd = (gintptr) WSACreateEvent ();
2224 case G_IO_WIN32_WINDOWS_MESSAGES:
2225 fd->fd = G_WIN32_MSG_HANDLE;
2229 g_assert_not_reached ();
2233 fd->events = condition;
2238 /* Binary compatibility */
2240 g_io_channel_win32_new_stream_socket (int socket)
2242 return g_io_channel_win32_new_socket (socket);