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_WRITEABLE)
159 g_print ("%sWRITEABLE", bar), bar = "|";
160 if (flags & G_IO_FLAG_IS_SEEKABLE)
161 g_print ("%sSEEKABLE", bar), bar = "|";
165 g_io_win32_get_debug_flag (void)
167 #ifdef G_IO_WIN32_DEBUG
170 if (getenv ("G_IO_WIN32_DEBUG") != NULL)
178 g_io_channel_win32_init (GIOWin32Channel *channel)
180 channel->debug = g_io_win32_get_debug_flag ();
181 channel->buffer = NULL;
182 channel->running = FALSE;
183 channel->needs_close = FALSE;
184 channel->thread_id = 0;
185 channel->data_avail_event = NULL;
186 channel->revents = 0;
187 channel->space_avail_event = NULL;
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 while (channel->running)
239 LOCK (channel->mutex);
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);
297 UNLOCK (channel->mutex);
300 channel->running = FALSE;
301 if (channel->needs_close)
304 g_print ("read_thread %#x: channel fd %d needs closing\n",
305 channel->thread_id, channel->fd);
311 g_print ("read_thread %#x: EOF, rdp=%d, wrp=%d, setting data_avail\n",
312 channel->thread_id, channel->rdp, channel->wrp);
313 SetEvent (channel->data_avail_event);
314 UNLOCK (channel->mutex);
316 g_io_channel_unref ((GIOChannel *)channel);
318 /* No need to call _endthreadex(), the actual thread starter routine
319 * in MSVCRT (see crt/src/threadex.c:_threadstartex) calls
320 * _endthreadex() for us.
327 create_thread (GIOWin32Channel *channel,
328 GIOCondition condition,
329 unsigned (__stdcall *thread) (void *parameter))
331 HANDLE thread_handle;
333 thread_handle = (HANDLE) _beginthreadex (NULL, 0, thread, channel, 0,
334 &channel->thread_id);
335 if (thread_handle == 0)
336 g_warning (G_STRLOC ": Error creating reader thread: %s",
338 else if (!CloseHandle (thread_handle))
339 g_warning (G_STRLOC ": Error closing thread handle: %s\n",
340 g_win32_error_message (GetLastError ()));
342 WaitForSingleObject (channel->space_avail_event, INFINITE);
346 init_reset_sockets (GIOWin32Channel *channel)
348 struct sockaddr_in local, local2, server;
351 channel->reset_send = (gint) socket (AF_INET, SOCK_DGRAM, 0);
352 if (channel->reset_send == INVALID_SOCKET)
354 g_warning (G_STRLOC ": Error creating reset_send socket: %s\n",
355 g_win32_error_message (WSAGetLastError ()));
358 local.sin_family = AF_INET;
360 local.sin_addr.s_addr = htonl (INADDR_ANY);
362 if (bind (channel->reset_send, (struct sockaddr *)&local, sizeof (local)) == SOCKET_ERROR)
364 g_warning (G_STRLOC ": Error binding to reset_send socket: %s\n",
365 g_win32_error_message (WSAGetLastError ()));
368 local2.sin_family = AF_INET;
370 local2.sin_addr.s_addr = htonl (INADDR_ANY);
372 channel->reset_recv = (gint) socket (AF_INET, SOCK_DGRAM, 0);
373 if (channel->reset_recv == INVALID_SOCKET)
375 g_warning (G_STRLOC ": Error creating reset_recv socket: %s\n",
376 g_win32_error_message (WSAGetLastError ()));
379 if (bind (channel->reset_recv, (struct sockaddr *)&local2, sizeof (local)) == SOCKET_ERROR)
381 g_warning (G_STRLOC ": Error binding to reset_recv socket: %s\n",
382 g_win32_error_message (WSAGetLastError ()));
385 len = sizeof (local2);
386 if (getsockname (channel->reset_recv, (struct sockaddr *)&local2, &len) == SOCKET_ERROR)
388 g_warning (G_STRLOC ": Error getsockname with reset_recv socket: %s\n",
389 g_win32_error_message (WSAGetLastError ()));
392 memset (&server, 0, sizeof (server));
393 server.sin_addr.s_addr = htonl (INADDR_LOOPBACK);
394 server.sin_family = AF_INET;
395 server.sin_port = local2.sin_port;
397 if (connect (channel->reset_send, (struct sockaddr *)&server, sizeof (server)) == SOCKET_ERROR)
399 g_warning (G_STRLOC ": connect to reset_recv socket: %s\n",
400 g_win32_error_message (WSAGetLastError ()));
406 buffer_read (GIOWin32Channel *channel,
415 LOCK (channel->mutex);
417 g_print ("reading from thread %#x %d bytes, rdp=%d, wrp=%d\n",
418 channel->thread_id, count, channel->rdp, channel->wrp);
420 if (channel->wrp == channel->rdp)
422 UNLOCK (channel->mutex);
424 g_print ("waiting for data from thread %#x\n", channel->thread_id);
425 WaitForSingleObject (channel->data_avail_event, INFINITE);
427 g_print ("done waiting for data from thread %#x\n", channel->thread_id);
428 LOCK (channel->mutex);
429 if (channel->wrp == channel->rdp && !channel->running)
432 g_print ("wrp==rdp, !running\n");
433 UNLOCK (channel->mutex);
435 return G_IO_STATUS_EOF;
439 if (channel->rdp < channel->wrp)
440 nbytes = channel->wrp - channel->rdp;
442 nbytes = BUFFER_SIZE - channel->rdp;
443 UNLOCK (channel->mutex);
444 nbytes = MIN (left, nbytes);
446 g_print ("moving %d bytes from thread %#x\n",
447 nbytes, channel->thread_id);
448 memcpy (dest, channel->buffer + channel->rdp, nbytes);
451 LOCK (channel->mutex);
452 channel->rdp = (channel->rdp + nbytes) % BUFFER_SIZE;
454 g_print ("setting space_avail for thread %#x\n", channel->thread_id);
455 SetEvent (channel->space_avail_event);
457 g_print ("for thread %#x: rdp=%d, wrp=%d\n",
458 channel->thread_id, channel->rdp, channel->wrp);
459 if (channel->running && channel->wrp == channel->rdp)
462 g_print ("resetting data_avail of thread %#x\n",
464 ResetEvent (channel->data_avail_event);
466 UNLOCK (channel->mutex);
468 /* We have no way to indicate any errors form the actual
469 * read() or recv() call in the reader thread. Should we have?
471 *bytes_read = count - left;
472 return (*bytes_read > 0) ? G_IO_STATUS_NORMAL : G_IO_STATUS_EOF;
475 static unsigned __stdcall
476 select_thread (void *parameter)
478 GIOWin32Channel *channel = parameter;
479 fd_set read_fds, write_fds, except_fds;
484 g_io_channel_ref ((GIOChannel *)channel);
487 g_print ("select_thread %#x: start fd:%d data_avail:%#x data_avail_noticed:%#x\n",
490 (guint) channel->data_avail_event,
491 (guint) channel->data_avail_noticed_event);
493 channel->rdp = channel->wrp = 0;
494 channel->running = TRUE;
496 SetEvent (channel->space_avail_event);
498 while (channel->running)
501 FD_ZERO (&write_fds);
502 FD_ZERO (&except_fds);
503 FD_SET (channel->reset_recv, &read_fds);
505 LOCK (channel->mutex);
506 tmp = channel->watches;
509 GIOWin32Watch *watch = (GIOWin32Watch *)tmp->data;
511 if (watch->condition & (G_IO_IN | G_IO_HUP))
512 FD_SET (channel->fd, &read_fds);
513 if (watch->condition & G_IO_OUT)
514 FD_SET (channel->fd, &write_fds);
515 if (watch->condition & G_IO_ERR)
516 FD_SET (channel->fd, &except_fds);
520 UNLOCK (channel->mutex);
523 g_print ("select_thread %#x: calling select() for%s%s%s\n",
525 (FD_ISSET (channel->fd, &read_fds) ? " IN" : ""),
526 (FD_ISSET (channel->fd, &write_fds) ? " OUT" : ""),
527 (FD_ISSET (channel->fd, &except_fds) ? " ERR" : ""));
529 n = select (1, &read_fds, &write_fds, &except_fds, NULL);
531 LOCK (channel->mutex);
532 if (channel->needs_close)
534 UNLOCK (channel->mutex);
537 UNLOCK (channel->mutex);
539 if (n == SOCKET_ERROR)
542 g_print ("select_thread %#x: select returned SOCKET_ERROR\n",
547 if (FD_ISSET (channel->reset_recv, &read_fds))
550 g_print ("select_thread %#x: re-looping\n",
552 recv (channel->reset_recv, (char *)&buffer, (int) sizeof (buffer), 0);
557 g_print ("select_thread %#x: got%s%s%s\n",
559 (FD_ISSET (channel->fd, &read_fds) ? " IN" : ""),
560 (FD_ISSET (channel->fd, &write_fds) ? " OUT" : ""),
561 (FD_ISSET (channel->fd, &except_fds) ? " ERR" : ""));
563 if (FD_ISSET (channel->fd, &read_fds))
564 channel->revents |= G_IO_IN;
565 if (FD_ISSET (channel->fd, &write_fds))
566 channel->revents |= G_IO_OUT;
567 if (FD_ISSET (channel->fd, &except_fds))
568 channel->revents |= G_IO_ERR;
571 g_print ("select_thread %#x: resetting data_avail_noticed, setting data_avail\n",
574 LOCK (channel->mutex);
575 ResetEvent (channel->data_avail_noticed_event);
576 SetEvent (channel->data_avail_event);
577 if (channel->needs_close)
579 UNLOCK (channel->mutex);
582 UNLOCK (channel->mutex);
585 g_print ("select_thread %#x: waiting for data_avail_noticed\n",
588 WaitForSingleObject (channel->data_avail_noticed_event, INFINITE);
590 g_print ("select_thread %#x: got data_avail_noticed\n",
594 LOCK (channel->mutex);
595 channel->running = FALSE;
597 g_print ("select_thread %#x: got error, setting data_avail\n",
599 SetEvent (channel->data_avail_event);
600 g_io_channel_unref ((GIOChannel *)channel);
601 UNLOCK (channel->mutex);
603 /* No need to call _endthreadex(), the actual thread starter routine
604 * in MSVCRT (see crt/src/threadex.c:_threadstartex) calls
605 * _endthreadex() for us.
612 g_io_win32_prepare (GSource *source,
615 GIOWin32Watch *watch = (GIOWin32Watch *)source;
616 GIOCondition buffer_condition = g_io_channel_get_buffer_condition (watch->channel);
617 GIOWin32Channel *channel = (GIOWin32Channel *)watch->channel;
622 g_print ("g_io_win32_prepare: for thread %#x buffer_condition:%#x\n"
623 " watch->pollfd.events:%#x watch->pollfd.revents:%#x channel->revents:%#x\n",
624 channel->thread_id, buffer_condition,
625 watch->pollfd.events, watch->pollfd.revents, channel->revents);
627 if (channel->type == G_IO_WIN32_FILE_DESC)
629 LOCK (channel->mutex);
630 if (channel->running && channel->wrp == channel->rdp)
633 g_print ("g_io_win32_prepare: for thread %#x, setting channel->revents = 0\n",
635 channel->revents = 0;
637 UNLOCK (channel->mutex);
639 else if (channel->type == G_IO_WIN32_SOCKET)
641 LOCK (channel->mutex);
642 channel->revents = 0;
644 g_print ("g_io_win32_prepare: for thread %#x, setting data_avail_noticed\n",
646 SetEvent (channel->data_avail_noticed_event);
648 g_print ("g_io_win32_prepare: thread %#x, there.\n",
650 UNLOCK (channel->mutex);
653 return ((watch->condition & buffer_condition) == watch->condition);
657 g_io_win32_check (GSource *source)
660 GIOWin32Watch *watch = (GIOWin32Watch *)source;
661 GIOWin32Channel *channel = (GIOWin32Channel *)watch->channel;
662 GIOCondition buffer_condition = g_io_channel_get_buffer_condition (watch->channel);
665 g_print ("g_io_win32_check: for thread %#x buffer_condition:%#x\n"
666 " watch->pollfd.events:%#x watch->pollfd.revents:%#x channel->revents:%#x\n",
667 channel->thread_id, buffer_condition,
668 watch->pollfd.events, watch->pollfd.revents, channel->revents);
670 if (channel->type != G_IO_WIN32_WINDOWS_MESSAGES)
672 watch->pollfd.revents = (watch->pollfd.events & channel->revents);
676 return (PeekMessage (&msg, channel->hwnd, 0, 0, PM_NOREMOVE));
679 if (channel->type == G_IO_WIN32_SOCKET)
681 LOCK (channel->mutex);
683 g_print ("g_io_win32_check: thread %#x, resetting data_avail\n",
685 ResetEvent (channel->data_avail_event);
687 g_print ("g_io_win32_check: thread %#x, there.\n",
689 UNLOCK (channel->mutex);
692 return ((watch->pollfd.revents | buffer_condition) & watch->condition);
696 g_io_win32_dispatch (GSource *source,
697 GSourceFunc callback,
700 GIOFunc func = (GIOFunc)callback;
701 GIOWin32Watch *watch = (GIOWin32Watch *)source;
702 GIOCondition buffer_condition = g_io_channel_get_buffer_condition (watch->channel);
706 g_warning (G_STRLOC ": GIOWin32Watch dispatched without callback\n"
707 "You must call g_source_connect().");
711 return (*func) (watch->channel,
712 (watch->pollfd.revents | buffer_condition) & watch->condition,
717 g_io_win32_finalize (GSource *source)
719 GIOWin32Watch *watch = (GIOWin32Watch *)source;
720 GIOWin32Channel *channel = (GIOWin32Channel *)watch->channel;
721 char send_buffer[] = "f";
723 LOCK (channel->mutex);
725 g_print ("g_io_win32_finalize: channel with thread %#x\n",
728 channel->watches = g_slist_remove (channel->watches, watch);
730 SetEvent (channel->data_avail_noticed_event);
731 if (channel->type == G_IO_WIN32_SOCKET)
732 send (channel->reset_send, send_buffer, sizeof (send_buffer), 0);
734 g_io_channel_unref (watch->channel);
735 UNLOCK (channel->mutex);
738 #if defined(G_PLATFORM_WIN32) && defined(__GNUC__)
739 __declspec(dllexport)
741 GSourceFuncs g_io_watch_funcs = {
749 g_io_win32_create_watch (GIOChannel *channel,
750 GIOCondition condition,
751 unsigned (__stdcall *thread) (void *parameter))
753 GIOWin32Channel *win32_channel = (GIOWin32Channel *)channel;
754 GIOWin32Watch *watch;
756 char send_buffer[] = "c";
758 source = g_source_new (&g_io_watch_funcs, sizeof (GIOWin32Watch));
759 watch = (GIOWin32Watch *)source;
761 watch->channel = channel;
762 g_io_channel_ref (channel);
764 watch->condition = condition;
766 if (win32_channel->data_avail_event == NULL)
767 create_events (win32_channel);
769 watch->pollfd.fd = (gint) win32_channel->data_avail_event;
770 watch->pollfd.events = condition;
772 if (win32_channel->debug)
773 g_print ("g_io_win32_create_watch: fd:%d condition:%#x handle:%#x\n",
774 win32_channel->fd, condition, watch->pollfd.fd);
776 LOCK (win32_channel->mutex);
777 win32_channel->watches = g_slist_append (win32_channel->watches, watch);
779 if (win32_channel->thread_id == 0)
780 create_thread (win32_channel, condition, thread);
782 send (win32_channel->reset_send, send_buffer, sizeof (send_buffer), 0);
784 g_source_add_poll (source, &watch->pollfd);
785 UNLOCK (win32_channel->mutex);
791 g_io_win32_msg_read (GIOChannel *channel,
797 GIOWin32Channel *win32_channel = (GIOWin32Channel *)channel;
798 MSG msg; /* In case of alignment problems */
800 if (count < sizeof (MSG))
802 g_set_error (err, G_IO_CHANNEL_ERROR, G_IO_CHANNEL_ERROR_INVAL,
803 "Incorrect message size"); /* Informative enough error message? */
804 return G_IO_STATUS_ERROR;
807 if (win32_channel->debug)
808 g_print ("g_io_win32_msg_read: for %#x\n",
809 (guint) win32_channel->hwnd);
810 if (!PeekMessage (&msg, win32_channel->hwnd, 0, 0, PM_REMOVE))
811 return G_IO_STATUS_AGAIN;
813 memmove (buf, &msg, sizeof (MSG));
814 *bytes_read = sizeof (MSG);
816 return G_IO_STATUS_NORMAL;
820 g_io_win32_msg_write (GIOChannel *channel,
823 gsize *bytes_written,
826 GIOWin32Channel *win32_channel = (GIOWin32Channel *)channel;
829 if (count != sizeof (MSG))
831 g_set_error (err, G_IO_CHANNEL_ERROR, G_IO_CHANNEL_ERROR_INVAL,
832 "Incorrect message size"); /* Informative enough error message? */
833 return G_IO_STATUS_ERROR;
836 /* In case of alignment problems */
837 memmove (&msg, buf, sizeof (MSG));
838 if (!PostMessage (win32_channel->hwnd, msg.message, msg.wParam, msg.lParam))
840 gchar *emsg = g_win32_error_message (GetLastError ());
841 g_set_error (err, G_IO_CHANNEL_ERROR, G_IO_CHANNEL_ERROR_FAILED, emsg);
843 return G_IO_STATUS_ERROR;
846 *bytes_written = sizeof (MSG);
848 return G_IO_STATUS_NORMAL;
852 g_io_win32_msg_close (GIOChannel *channel,
855 /* Nothing to be done. Or should we set hwnd to some invalid value? */
857 return G_IO_STATUS_NORMAL;
861 g_io_win32_free (GIOChannel *channel)
863 GIOWin32Channel *win32_channel = (GIOWin32Channel *)channel;
865 if (win32_channel->debug)
866 g_print ("thread %#x: freeing channel, fd: %d\n",
867 win32_channel->thread_id,
870 if (win32_channel->reset_send)
871 closesocket (win32_channel->reset_send);
872 if (win32_channel->reset_recv)
873 closesocket (win32_channel->reset_recv);
874 if (win32_channel->data_avail_event)
875 CloseHandle (win32_channel->data_avail_event);
876 if (win32_channel->space_avail_event)
877 CloseHandle (win32_channel->space_avail_event);
878 if (win32_channel->data_avail_noticed_event)
879 CloseHandle (win32_channel->data_avail_noticed_event);
880 DeleteCriticalSection (&win32_channel->mutex);
882 g_free (win32_channel->buffer);
883 g_slist_free (win32_channel->watches);
884 g_free (win32_channel);
888 g_io_win32_msg_create_watch (GIOChannel *channel,
889 GIOCondition condition)
891 GIOWin32Watch *watch;
894 source = g_source_new (&g_io_watch_funcs, sizeof (GIOWin32Watch));
895 watch = (GIOWin32Watch *)source;
897 watch->channel = channel;
898 g_io_channel_ref (channel);
900 watch->condition = condition;
902 watch->pollfd.fd = G_WIN32_MSG_HANDLE;
903 watch->pollfd.events = condition;
905 g_source_add_poll (source, &watch->pollfd);
911 g_io_win32_fd_read (GIOChannel *channel,
917 GIOWin32Channel *win32_channel = (GIOWin32Channel *)channel;
920 if (win32_channel->debug)
921 g_print ("g_io_win32_fd_read: fd:%d count:%d\n",
922 win32_channel->fd, count);
924 if (win32_channel->thread_id)
926 return buffer_read (win32_channel, buf, count, bytes_read, err);
929 result = read (win32_channel->fd, buf, count);
931 if (win32_channel->debug)
932 g_print ("g_io_win32_fd_read: read() = %d\n", result);
942 return G_IO_STATUS_AGAIN;
945 g_set_error (err, G_IO_CHANNEL_ERROR,
946 g_io_channel_error_from_errno (errno),
948 return G_IO_STATUS_ERROR;
952 *bytes_read = result;
954 return (result > 0) ? G_IO_STATUS_NORMAL : G_IO_STATUS_EOF;
958 g_io_win32_fd_write (GIOChannel *channel,
961 gsize *bytes_written,
964 GIOWin32Channel *win32_channel = (GIOWin32Channel *)channel;
967 result = write (win32_channel->fd, buf, count);
968 if (win32_channel->debug)
969 g_print ("g_io_win32_fd_write: fd:%d count:%d = %d\n",
970 win32_channel->fd, count, result);
980 return G_IO_STATUS_AGAIN;
983 g_set_error (err, G_IO_CHANNEL_ERROR,
984 g_io_channel_error_from_errno (errno),
986 return G_IO_STATUS_ERROR;
990 *bytes_written = result;
992 return G_IO_STATUS_NORMAL;
996 g_io_win32_fd_seek (GIOChannel *channel,
1001 GIOWin32Channel *win32_channel = (GIOWin32Channel *)channel;
1018 whence = -1; /* Keep the compiler quiet */
1019 g_assert_not_reached ();
1022 tmp_offset = offset;
1023 if (tmp_offset != offset)
1025 g_set_error (err, G_IO_CHANNEL_ERROR,
1026 g_io_channel_error_from_errno (EINVAL),
1027 g_strerror (EINVAL));
1028 return G_IO_STATUS_ERROR;
1031 result = lseek (win32_channel->fd, tmp_offset, whence);
1035 g_set_error (err, G_IO_CHANNEL_ERROR,
1036 g_io_channel_error_from_errno (errno),
1037 g_strerror (errno));
1038 return G_IO_STATUS_ERROR;
1041 return G_IO_STATUS_NORMAL;
1045 g_io_win32_fd_close (GIOChannel *channel,
1048 GIOWin32Channel *win32_channel = (GIOWin32Channel *)channel;
1050 if (win32_channel->debug)
1051 g_print ("thread %#x: closing fd %d\n",
1052 win32_channel->thread_id,
1054 LOCK (win32_channel->mutex);
1055 if (win32_channel->running)
1057 if (win32_channel->debug)
1058 g_print ("thread %#x: running, marking fd %d for later close\n",
1059 win32_channel->thread_id, win32_channel->fd);
1060 win32_channel->running = FALSE;
1061 win32_channel->needs_close = TRUE;
1062 SetEvent (win32_channel->data_avail_event);
1066 if (win32_channel->debug)
1067 g_print ("closing fd %d\n", win32_channel->fd);
1068 close (win32_channel->fd);
1069 if (win32_channel->debug)
1070 g_print ("closed fd %d, setting to -1\n",
1072 win32_channel->fd = -1;
1074 UNLOCK (win32_channel->mutex);
1076 /* FIXME error detection? */
1078 return G_IO_STATUS_NORMAL;
1082 g_io_win32_fd_create_watch (GIOChannel *channel,
1083 GIOCondition condition)
1085 return g_io_win32_create_watch (channel, condition, read_thread);
1089 g_io_win32_sock_read (GIOChannel *channel,
1095 GIOWin32Channel *win32_channel = (GIOWin32Channel *)channel;
1097 GIOChannelError error = G_IO_STATUS_NORMAL;
1098 GIOStatus internal_status = G_IO_STATUS_NORMAL;
1099 char send_buffer[] = "sr";
1101 if (win32_channel->debug)
1102 g_print ("g_io_win32_sock_read: sockfd:%d count:%d\n",
1103 win32_channel->fd, count);
1104 #ifdef WE_NEED_TO_HANDLE_WSAEINTR
1107 result = recv (win32_channel->fd, buf, count, 0);
1109 if (win32_channel->debug)
1110 g_print ("g_io_win32_sock_read: recv:%d\n", result);
1112 if (result == SOCKET_ERROR)
1116 switch (WSAGetLastError ())
1119 error = G_IO_CHANNEL_ERROR_INVAL;
1121 case WSAEWOULDBLOCK:
1122 return G_IO_STATUS_AGAIN;
1123 #ifdef WE_NEED_TO_HANDLE_WSAEINTR /* not anymore with wsock2 ? */
1128 error = G_IO_CHANNEL_ERROR_FAILED;
1131 g_set_error (err, G_IO_CHANNEL_ERROR, error, "Socket read error");
1132 internal_status = G_IO_STATUS_ERROR;
1133 /* FIXME get all errors, better error messages */
1137 *bytes_read = result;
1139 internal_status = G_IO_STATUS_EOF;
1142 if ((internal_status == G_IO_STATUS_EOF) ||
1143 (internal_status == G_IO_STATUS_ERROR))
1145 LOCK (win32_channel->mutex);
1146 SetEvent (win32_channel->data_avail_noticed_event);
1147 win32_channel->needs_close = 1;
1148 send (win32_channel->reset_send, send_buffer, sizeof (send_buffer), 0);
1149 UNLOCK (win32_channel->mutex);
1151 return internal_status;
1155 g_io_win32_sock_write (GIOChannel *channel,
1158 gsize *bytes_written,
1161 GIOWin32Channel *win32_channel = (GIOWin32Channel *)channel;
1163 GIOChannelError error = G_IO_STATUS_NORMAL;
1164 char send_buffer[] = "sw";
1166 if (win32_channel->debug)
1167 g_print ("g_io_win32_sock_write: sockfd:%d count:%d\n",
1168 win32_channel->fd, count);
1169 #ifdef WE_NEED_TO_HANDLE_WSAEINTR
1172 result = send (win32_channel->fd, buf, count, 0);
1174 if (win32_channel->debug)
1175 g_print ("g_io_win32_sock_write: send:%d\n", result);
1177 if (result == SOCKET_ERROR)
1181 switch (WSAGetLastError ())
1184 error = G_IO_CHANNEL_ERROR_INVAL;
1186 case WSAEWOULDBLOCK:
1187 return G_IO_STATUS_AGAIN;
1188 #ifdef WE_NEED_TO_HANDLE_WSAEINTR /* not anymore with wsock2 ? */
1193 error = G_IO_CHANNEL_ERROR_FAILED;
1196 g_set_error (err, G_IO_CHANNEL_ERROR, error, "Socket write error");
1197 LOCK (win32_channel->mutex);
1198 SetEvent (win32_channel->data_avail_noticed_event);
1199 win32_channel->needs_close = 1;
1200 send (win32_channel->reset_send, send_buffer, sizeof (send_buffer), 0);
1201 UNLOCK (win32_channel->mutex);
1202 return G_IO_STATUS_ERROR;
1203 /* FIXME get all errors, better error messages */
1207 *bytes_written = result;
1209 return G_IO_STATUS_NORMAL;
1214 g_io_win32_sock_close (GIOChannel *channel,
1217 GIOWin32Channel *win32_channel = (GIOWin32Channel *)channel;
1219 LOCK (win32_channel->mutex);
1220 if (win32_channel->running)
1222 if (win32_channel->debug)
1223 g_print ("thread %#x: running, marking for later close\n",
1224 win32_channel->thread_id);
1225 win32_channel->running = FALSE;
1226 win32_channel->needs_close = TRUE;
1227 SetEvent(win32_channel->data_avail_noticed_event);
1229 if (win32_channel->fd != -1)
1231 if (win32_channel->debug)
1232 g_print ("thread %#x: closing socket %d\n",
1233 win32_channel->thread_id,
1236 closesocket (win32_channel->fd);
1237 win32_channel->fd = -1;
1239 UNLOCK (win32_channel->mutex);
1241 /* FIXME error detection? */
1243 return G_IO_STATUS_NORMAL;
1247 g_io_win32_sock_create_watch (GIOChannel *channel,
1248 GIOCondition condition)
1250 return g_io_win32_create_watch (channel, condition, select_thread);
1254 g_io_channel_new_file (const gchar *filename,
1258 int fid, flags, pmode;
1259 GIOChannel *channel;
1261 enum { /* Cheesy hack */
1268 g_return_val_if_fail (filename != NULL, NULL);
1269 g_return_val_if_fail (mode != NULL, NULL);
1270 g_return_val_if_fail ((error == NULL) || (*error == NULL), NULL);
1284 g_warning ("Invalid GIOFileMode %s.\n", mode);
1293 if (mode[2] == '\0')
1295 mode_num |= MODE_PLUS;
1300 g_warning ("Invalid GIOFileMode %s.\n", mode);
1311 flags = O_WRONLY | O_TRUNC | O_CREAT;
1315 flags = O_WRONLY | O_APPEND | O_CREAT;
1318 case MODE_R | MODE_PLUS:
1320 pmode = _S_IREAD | _S_IWRITE;
1322 case MODE_W | MODE_PLUS:
1323 flags = O_RDWR | O_TRUNC | O_CREAT;
1324 pmode = _S_IREAD | _S_IWRITE;
1326 case MODE_A | MODE_PLUS:
1327 flags = O_RDWR | O_APPEND | O_CREAT;
1328 pmode = _S_IREAD | _S_IWRITE;
1331 g_assert_not_reached ();
1336 /* always open 'untranslated' */
1337 fid = open (filename, flags | _O_BINARY, pmode);
1339 if (g_io_win32_get_debug_flag ())
1341 g_print ("g_io_channel_win32_new_file: open(\"%s\", ", filename);
1342 g_win32_print_access_mode (flags|_O_BINARY);
1343 g_print (",%#o)=%d\n", pmode, fid);
1348 g_set_error (error, G_FILE_ERROR,
1349 g_file_error_from_errno (errno),
1350 g_strerror (errno));
1351 return (GIOChannel *)NULL;
1354 channel = g_io_channel_win32_new_fd (fid);
1356 /* XXX: move this to g_io_channel_win32_new_fd () */
1357 channel->close_on_unref = TRUE;
1358 channel->is_seekable = TRUE;
1360 /* g_io_channel_win32_new_fd sets is_readable and is_writeable to
1361 * correspond to actual readability/writeability. Set to FALSE those
1362 * that mode doesn't allow
1367 channel->is_writeable = FALSE;
1371 channel->is_readable = FALSE;
1373 case MODE_R | MODE_PLUS:
1374 case MODE_W | MODE_PLUS:
1375 case MODE_A | MODE_PLUS:
1378 g_assert_not_reached ();
1385 g_io_win32_set_flags (GIOChannel *channel,
1389 GIOWin32Channel *win32_channel = (GIOWin32Channel *)channel;
1391 if (win32_channel->debug)
1393 g_print ("g_io_win32_set_flags: ");
1394 g_win32_print_gioflags (flags);
1398 g_warning ("g_io_win32_set_flags () not implemented.\n");
1400 return G_IO_STATUS_NORMAL;
1404 g_io_win32_fd_get_flags_internal (GIOChannel *channel,
1407 GIOWin32Channel *win32_channel = (GIOWin32Channel *) channel;
1411 if (st->st_mode & _S_IFIFO)
1413 channel->is_readable =
1414 (PeekNamedPipe ((HANDLE) _get_osfhandle (win32_channel->fd), &c, 0, &count, NULL, NULL) != 0) || GetLastError () == ERROR_BROKEN_PIPE;
1415 channel->is_writeable =
1416 (WriteFile ((HANDLE) _get_osfhandle (win32_channel->fd), &c, 0, &count, NULL) != 0);
1417 channel->is_seekable = FALSE;
1419 else if (st->st_mode & _S_IFCHR)
1421 /* XXX Seems there is no way to find out the readability of file
1422 * handles to device files (consoles, mostly) without doing a
1423 * blocking read. So punt, use st->st_mode.
1425 channel->is_readable = !!(st->st_mode & _S_IREAD);
1427 channel->is_writeable =
1428 (WriteFile ((HANDLE) _get_osfhandle (win32_channel->fd), &c, 0, &count, NULL) != 0);
1430 /* XXX What about devices that actually *are* seekable? But
1431 * those would probably not be handled using the C runtime
1432 * anyway, but using Windows-specific code.
1434 channel->is_seekable = FALSE;
1438 channel->is_readable =
1439 (ReadFile ((HANDLE) _get_osfhandle (win32_channel->fd), &c, 0, &count, NULL) != 0);
1440 channel->is_writeable =
1441 (WriteFile ((HANDLE) _get_osfhandle (win32_channel->fd), &c, 0, &count, NULL) != 0);
1442 channel->is_seekable = TRUE;
1445 /* XXX: G_IO_FLAG_APPEND */
1446 /* XXX: G_IO_FLAG_NONBLOCK */
1452 g_io_win32_fd_get_flags (GIOChannel *channel)
1455 GIOWin32Channel *win32_channel = (GIOWin32Channel *)channel;
1457 g_return_val_if_fail (win32_channel != NULL, 0);
1458 g_return_val_if_fail (win32_channel->type == G_IO_WIN32_FILE_DESC, 0);
1460 if (0 == fstat (win32_channel->fd, &st))
1461 return g_io_win32_fd_get_flags_internal (channel, &st);
1467 g_io_win32_msg_get_flags (GIOChannel *channel)
1473 g_io_win32_sock_get_flags (GIOChannel *channel)
1475 /* XXX Could do something here. */
1479 static GIOFuncs win32_channel_msg_funcs = {
1480 g_io_win32_msg_read,
1481 g_io_win32_msg_write,
1483 g_io_win32_msg_close,
1484 g_io_win32_msg_create_watch,
1486 g_io_win32_set_flags,
1487 g_io_win32_msg_get_flags,
1490 static GIOFuncs win32_channel_fd_funcs = {
1492 g_io_win32_fd_write,
1494 g_io_win32_fd_close,
1495 g_io_win32_fd_create_watch,
1497 g_io_win32_set_flags,
1498 g_io_win32_fd_get_flags,
1501 static GIOFuncs win32_channel_sock_funcs = {
1502 g_io_win32_sock_read,
1503 g_io_win32_sock_write,
1505 g_io_win32_sock_close,
1506 g_io_win32_sock_create_watch,
1508 g_io_win32_set_flags,
1509 g_io_win32_sock_get_flags,
1513 g_io_channel_win32_new_messages (guint hwnd)
1515 GIOWin32Channel *win32_channel = g_new (GIOWin32Channel, 1);
1516 GIOChannel *channel = (GIOChannel *)win32_channel;
1518 g_io_channel_init (channel);
1519 g_io_channel_win32_init (win32_channel);
1520 if (win32_channel->debug)
1521 g_print ("g_io_channel_win32_new_messages: hwnd = %ud\n", hwnd);
1522 channel->funcs = &win32_channel_msg_funcs;
1523 win32_channel->type = G_IO_WIN32_WINDOWS_MESSAGES;
1524 win32_channel->hwnd = (HWND) hwnd;
1526 /* XXX: check this. */
1527 channel->is_readable = IsWindow (win32_channel->hwnd);
1528 channel->is_writeable = IsWindow (win32_channel->hwnd);
1530 channel->is_seekable = FALSE;
1536 g_io_channel_win32_new_fd_internal (gint fd,
1539 GIOWin32Channel *win32_channel;
1540 GIOChannel *channel;
1542 win32_channel = g_new (GIOWin32Channel, 1);
1543 channel = (GIOChannel *)win32_channel;
1545 g_io_channel_init (channel);
1546 g_io_channel_win32_init (win32_channel);
1547 if (win32_channel->debug)
1548 g_print ("g_io_channel_win32_new_fd: %u\n", fd);
1549 channel->funcs = &win32_channel_fd_funcs;
1550 win32_channel->type = G_IO_WIN32_FILE_DESC;
1551 win32_channel->fd = fd;
1553 g_io_win32_fd_get_flags_internal (channel, st);
1559 g_io_channel_win32_new_fd (gint fd)
1563 if (fstat (fd, &st) == -1)
1565 g_warning (G_STRLOC ": %d isn't a C library file descriptor", fd);
1569 return g_io_channel_win32_new_fd_internal (fd, &st);
1573 g_io_channel_win32_get_fd (GIOChannel *channel)
1575 GIOWin32Channel *win32_channel = (GIOWin32Channel *)channel;
1577 return win32_channel->fd;
1581 g_io_channel_win32_new_socket (int socket)
1583 GIOWin32Channel *win32_channel = g_new (GIOWin32Channel, 1);
1584 GIOChannel *channel = (GIOChannel *)win32_channel;
1586 g_io_channel_init (channel);
1587 g_io_channel_win32_init (win32_channel);
1588 init_reset_sockets (win32_channel);
1589 if (win32_channel->debug)
1590 g_print ("g_io_channel_win32_new_socket: sockfd:%d\n", socket);
1591 channel->funcs = &win32_channel_sock_funcs;
1592 win32_channel->type = G_IO_WIN32_SOCKET;
1593 win32_channel->fd = socket;
1595 /* XXX: check this */
1596 channel->is_readable = TRUE;
1597 channel->is_writeable = TRUE;
1599 channel->is_seekable = FALSE;
1605 g_io_channel_unix_new (gint fd)
1609 if (fstat (fd, &st) == 0)
1610 return g_io_channel_win32_new_fd_internal (fd, &st);
1612 if (getsockopt (fd, SOL_SOCKET, SO_TYPE, NULL, NULL) != SOCKET_ERROR)
1613 return g_io_channel_win32_new_socket (fd);
1615 g_warning (G_STRLOC ": %d is neither a file descriptor or a socket", fd);
1620 g_io_channel_unix_get_fd (GIOChannel *channel)
1622 return g_io_channel_win32_get_fd (channel);
1626 g_io_channel_win32_set_debug (GIOChannel *channel,
1629 GIOWin32Channel *win32_channel = (GIOWin32Channel *)channel;
1631 win32_channel->debug = flag;
1635 g_io_channel_win32_poll (GPollFD *fds,
1641 g_return_val_if_fail (n_fds >= 0, 0);
1643 result = (*g_main_context_get_poll_func (NULL)) (fds, n_fds, timeout);
1649 g_io_channel_win32_make_pollfd (GIOChannel *channel,
1650 GIOCondition condition,
1653 GIOWin32Channel *win32_channel = (GIOWin32Channel *)channel;
1655 if (win32_channel->data_avail_event == NULL)
1656 create_events (win32_channel);
1658 fd->fd = (gint) win32_channel->data_avail_event;
1659 fd->events = condition;
1661 if (win32_channel->thread_id == 0)
1663 if ((condition & G_IO_IN) && win32_channel->type == G_IO_WIN32_FILE_DESC)
1664 create_thread (win32_channel, condition, read_thread);
1665 else if (win32_channel->type == G_IO_WIN32_SOCKET)
1666 create_thread (win32_channel, condition, select_thread);
1670 /* Binary compatibility */
1672 g_io_channel_win32_new_stream_socket (int socket)
1674 return g_io_channel_win32_new_socket (socket);