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glib2.0/glib/giowin32.c

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/* GLIB - Library of useful routines for C programming
* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
*
* giowin32.c: IO Channels for Win32.
* Copyright 1998 Owen Taylor and Tor Lillqvist
* Copyright 1999-2000 Tor Lillqvist and Craig Setera
* Copyright 2001-2003 Andrew Lanoix
*
* SPDX-License-Identifier: LGPL-2.1-or-later
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
/*
* Modified by the GLib Team and others 1997-2000. See the AUTHORS
* file for a list of people on the GLib Team. See the ChangeLog
* files for a list of changes. These files are distributed with
* GLib at ftp://ftp.gtk.org/pub/gtk/.
*/
/*
* Bugs that are related to the code in this file:
*
* Bug 137968 - Sometimes a GIOFunc on Win32 is called with zero condition
* http://bugzilla.gnome.org/show_bug.cgi?id=137968
*
* Bug 324234 - Using g_io_add_watch_full() to wait for connect() to return on a non-blocking socket returns prematurely
* http://bugzilla.gnome.org/show_bug.cgi?id=324234
*
* Bug 331214 - g_io_channel async socket io stalls
* http://bugzilla.gnome.org/show_bug.cgi?id=331214
*
* Bug 338943 - Multiple watches on the same socket
* http://bugzilla.gnome.org/show_bug.cgi?id=338943
*
* Bug 357674 - 2 serious bugs in giowin32.c making glib iochannels useless
* http://bugzilla.gnome.org/show_bug.cgi?id=357674
*
* Bug 425156 - GIOChannel deadlocks on a win32 socket
* http://bugzilla.gnome.org/show_bug.cgi?id=425156
*
* Bug 468910 - giofunc condition=0
* http://bugzilla.gnome.org/show_bug.cgi?id=468910
*
* Bug 500246 - Bug fixes for giowin32
* http://bugzilla.gnome.org/show_bug.cgi?id=500246
*
* Bug 548278 - Async GETs connections are always terminated unexpectedly on windows
* http://bugzilla.gnome.org/show_bug.cgi?id=548278
*
* Bug 548536 - giowin32 problem when adding and removing watches
* http://bugzilla.gnome.org/show_bug.cgi?id=548536
*
* When fixing bugs related to the code in this file, either the above
* bugs or others, make sure that the test programs attached to the
* above bugs continue to work.
*/
#include "config.h"
#include "glib.h"
#include <stdlib.h>
#include <winsock2.h>
#include <windows.h>
#include <conio.h>
#include <fcntl.h>
#include <io.h>
#include <process.h>
#include <errno.h>
#include <sys/stat.h>
#include "gstdio.h"
#include "glibintl.h"
typedef struct _GIOWin32Channel GIOWin32Channel;
typedef struct _GIOWin32Watch GIOWin32Watch;
#define BUFFER_SIZE 4096
typedef enum {
G_IO_WIN32_WINDOWS_MESSAGES, /* Windows messages */
G_IO_WIN32_FILE_DESC, /* Unix-like file descriptors from
* _open() or _pipe(), except for
* console IO. Separate thread to read
* or write.
*/
G_IO_WIN32_CONSOLE, /* Console IO (usually stdin, stdout, stderr) */
G_IO_WIN32_SOCKET /* Sockets. No separate thread. */
} GIOWin32ChannelType;
struct _GIOWin32Channel {
GIOChannel channel;
gint fd; /* Either a Unix-like file handle as provided
* by the Microsoft C runtime, or a SOCKET
* as provided by WinSock.
*/
GIOWin32ChannelType type;
gboolean debug;
/* Field used by G_IO_WIN32_WINDOWS_MESSAGES channels */
HWND hwnd; /* Handle of window, or NULL */
/* Fields used by G_IO_WIN32_FILE_DESC channels. */
CRITICAL_SECTION mutex;
int direction; /* 0 means we read from it,
* 1 means we write to it.
*/
gboolean running; /* Is reader or writer thread
* running. FALSE if EOF has been
* reached by the reader thread.
*/
gboolean needs_close; /* If the channel has been closed while
* the reader thread was still running.
*/
guint thread_id; /* If non-NULL the channel has or has
* had a reader or writer thread.
*/
HANDLE data_avail_event;
gushort revents;
/* Data is kept in a circular buffer. To be able to distinguish between
* empty and full buffers, we cannot fill it completely, but have to
* leave a one character gap.
*
* Data available is between indexes rdp and wrp-1 (modulo BUFFER_SIZE).
*
* Empty: wrp == rdp
* Full: (wrp + 1) % BUFFER_SIZE == rdp
* Partial: otherwise
*/
guchar *buffer; /* (Circular) buffer */
gint wrp, rdp; /* Buffer indices for writing and reading */
HANDLE space_avail_event;
/* Fields used by G_IO_WIN32_SOCKET channels */
int event_mask;
int last_events;
HANDLE event;
gboolean write_would_have_blocked;
gboolean ever_writable;
};
struct _GIOWin32Watch {
GSource source;
GPollFD pollfd;
GIOChannel *channel;
GIOCondition condition;
};
static void
g_win32_print_access_mode (int flags)
{
g_print ("%s%s%s%s%s%s%s%s%s%s",
((flags & 0x3) == _O_RDWR ? "O_RDWR" :
((flags & 0x3) == _O_RDONLY ? "O_RDONLY" :
((flags & 0x3) == _O_WRONLY ? "O_WRONLY" : "0"))),
(flags & _O_APPEND ? "|O_APPEND" : ""),
(flags & _O_RANDOM ? "|O_RANDOM" : ""),
(flags & _O_SEQUENTIAL ? "|O_SEQUENTIAL" : ""),
(flags & _O_TEMPORARY ? "|O_TEMPORARY" : ""),
(flags & _O_CREAT ? "|O_CREAT" : ""),
(flags & _O_TRUNC ? "|O_TRUNC" : ""),
(flags & _O_EXCL ? "|O_EXCL" : ""),
(flags & _O_TEXT ? "|O_TEXT" : ""),
(flags & _O_BINARY ? "|O_BINARY" : ""));
}
static void
g_win32_print_gioflags (GIOFlags flags)
{
char *bar = "";
if (flags & G_IO_FLAG_APPEND)
bar = "|", g_print ("APPEND");
if (flags & G_IO_FLAG_NONBLOCK)
g_print ("%sNONBLOCK", bar), bar = "|";
if (flags & G_IO_FLAG_IS_READABLE)
g_print ("%sREADABLE", bar), bar = "|";
if (flags & G_IO_FLAG_IS_WRITABLE)
g_print ("%sWRITABLE", bar), bar = "|";
if (flags & G_IO_FLAG_IS_SEEKABLE)
g_print ("%sSEEKABLE", bar), bar = "|";
}
static const char *
event_mask_to_string (int mask)
{
char buf[100];
int checked_bits = 0;
char *bufp = buf;
if (mask == 0)
return "";
#define BIT(n) checked_bits |= FD_##n; if (mask & FD_##n) bufp += sprintf (bufp, "%s" #n, (bufp>buf ? "|" : ""))
BIT (READ);
BIT (WRITE);
BIT (OOB);
BIT (ACCEPT);
BIT (CONNECT);
BIT (CLOSE);
BIT (QOS);
BIT (GROUP_QOS);
BIT (ROUTING_INTERFACE_CHANGE);
BIT (ADDRESS_LIST_CHANGE);
#undef BIT
if ((mask & ~checked_bits) != 0)
bufp += sprintf (bufp, "|%#x", mask & ~checked_bits);
return g_quark_to_string (g_quark_from_string (buf));
}
static const char *
condition_to_string (GIOCondition condition)
{
char buf[100];
int checked_bits = 0;
char *bufp = buf;
if (condition == 0)
return "";
#define BIT(n) checked_bits |= G_IO_##n; if (condition & G_IO_##n) bufp += sprintf (bufp, "%s" #n, (bufp>buf ? "|" : ""))
BIT (IN);
BIT (OUT);
BIT (PRI);
BIT (ERR);
BIT (HUP);
BIT (NVAL);
#undef BIT
if ((condition & ~checked_bits) != 0)
bufp += sprintf (bufp, "|%#x", condition & ~checked_bits);
return g_quark_to_string (g_quark_from_string (buf));
}
static gboolean
g_io_win32_get_debug_flag (void)
{
return (g_getenv ("G_IO_WIN32_DEBUG") != NULL);
}
static void
g_io_channel_win32_init (GIOWin32Channel *channel)
{
channel->debug = g_io_win32_get_debug_flag ();
InitializeCriticalSection (&channel->mutex);
channel->running = FALSE;
channel->needs_close = FALSE;
channel->thread_id = 0;
channel->data_avail_event = NULL;
channel->revents = 0;
channel->buffer = NULL;
channel->space_avail_event = NULL;
channel->event_mask = 0;
channel->last_events = 0;
channel->event = NULL;
channel->write_would_have_blocked = FALSE;
channel->ever_writable = FALSE;
}
static void
create_events (GIOWin32Channel *channel)
{
SECURITY_ATTRIBUTES sec_attrs;
sec_attrs.nLength = sizeof (SECURITY_ATTRIBUTES);
sec_attrs.lpSecurityDescriptor = NULL;
sec_attrs.bInheritHandle = FALSE;
/* The data available event is manual reset, the space available event
* is automatic reset.
*/
if (!(channel->data_avail_event = CreateEvent (&sec_attrs, TRUE, FALSE, NULL))
|| !(channel->space_avail_event = CreateEvent (&sec_attrs, FALSE, FALSE, NULL)))
{
gchar *emsg = g_win32_error_message (GetLastError ());
g_error ("Error creating event: %s", emsg);
g_free (emsg);
}
}
static unsigned __stdcall
read_thread (void *parameter)
{
GIOWin32Channel *channel = parameter;
guchar *buffer;
gint nbytes;
g_io_channel_ref ((GIOChannel *)channel);
if (channel->debug)
g_print ("read_thread %#x: start fd=%d, data_avail=%p space_avail=%p\n",
channel->thread_id,
channel->fd,
channel->data_avail_event,
channel->space_avail_event);
channel->direction = 0;
channel->buffer = g_malloc (BUFFER_SIZE);
channel->rdp = channel->wrp = 0;
channel->running = TRUE;
SetEvent (channel->space_avail_event);
EnterCriticalSection (&channel->mutex);
while (channel->running)
{
if (channel->debug)
g_print ("read_thread %#x: rdp=%d, wrp=%d\n",
channel->thread_id, channel->rdp, channel->wrp);
if ((channel->wrp + 1) % BUFFER_SIZE == channel->rdp)
{
/* Buffer is full */
if (channel->debug)
g_print ("read_thread %#x: resetting space_avail\n",
channel->thread_id);
ResetEvent (channel->space_avail_event);
if (channel->debug)
g_print ("read_thread %#x: waiting for space\n",
channel->thread_id);
LeaveCriticalSection (&channel->mutex);
WaitForSingleObject (channel->space_avail_event, INFINITE);
EnterCriticalSection (&channel->mutex);
if (channel->debug)
g_print ("read_thread %#x: rdp=%d, wrp=%d\n",
channel->thread_id, channel->rdp, channel->wrp);
}
buffer = channel->buffer + channel->wrp;
/* Always leave at least one byte unused gap to be able to
* distinguish between the full and empty condition...
*/
nbytes = MIN ((channel->rdp + BUFFER_SIZE - channel->wrp - 1) % BUFFER_SIZE,
BUFFER_SIZE - channel->wrp);
if (channel->debug)
g_print ("read_thread %#x: calling read() for %d bytes\n",
channel->thread_id, nbytes);
LeaveCriticalSection (&channel->mutex);
nbytes = read (channel->fd, buffer, nbytes);
EnterCriticalSection (&channel->mutex);
channel->revents = G_IO_IN;
if (nbytes == 0)
channel->revents |= G_IO_HUP;
else if (nbytes < 0)
channel->revents |= G_IO_ERR;
if (channel->debug)
g_print ("read_thread %#x: read() returned %d, rdp=%d, wrp=%d\n",
channel->thread_id, nbytes, channel->rdp, channel->wrp);
if (nbytes <= 0)
break;
channel->wrp = (channel->wrp + nbytes) % BUFFER_SIZE;
if (channel->debug)
g_print ("read_thread %#x: rdp=%d, wrp=%d, setting data_avail\n",
channel->thread_id, channel->rdp, channel->wrp);
SetEvent (channel->data_avail_event);
}
channel->running = FALSE;
if (channel->needs_close)
{
if (channel->debug)
g_print ("read_thread %#x: channel fd %d needs closing\n",
channel->thread_id, channel->fd);
close (channel->fd);
channel->fd = -1;
}
if (channel->debug)
g_print ("read_thread %#x: EOF, rdp=%d, wrp=%d, setting data_avail\n",
channel->thread_id, channel->rdp, channel->wrp);
SetEvent (channel->data_avail_event);
LeaveCriticalSection (&channel->mutex);
g_io_channel_unref ((GIOChannel *)channel);
/* No need to call _endthreadex(), the actual thread starter routine
* in MSVCRT (see crt/src/threadex.c:_threadstartex) calls
* _endthreadex() for us.
*/
return 0;
}
static unsigned __stdcall
write_thread (void *parameter)
{
GIOWin32Channel *channel = parameter;
guchar *buffer;
gint nbytes;
g_io_channel_ref ((GIOChannel *)channel);
if (channel->debug)
g_print ("write_thread %#x: start fd=%d, data_avail=%p space_avail=%p\n",
channel->thread_id,
channel->fd,
channel->data_avail_event,
channel->space_avail_event);
channel->direction = 1;
channel->buffer = g_malloc (BUFFER_SIZE);
channel->rdp = channel->wrp = 0;
channel->running = TRUE;
SetEvent (channel->space_avail_event);
/* We use the same event objects as for a reader thread, but with
* reversed meaning. So, space_avail is used if data is available
* for writing, and data_avail is used if space is available in the
* write buffer.
*/
EnterCriticalSection (&channel->mutex);
while (channel->running || channel->rdp != channel->wrp)
{
if (channel->debug)
g_print ("write_thread %#x: rdp=%d, wrp=%d\n",
channel->thread_id, channel->rdp, channel->wrp);
if (channel->wrp == channel->rdp)
{
/* Buffer is empty. */
if (channel->debug)
g_print ("write_thread %#x: resetting space_avail\n",
channel->thread_id);
ResetEvent (channel->space_avail_event);
if (channel->debug)
g_print ("write_thread %#x: waiting for data\n",
channel->thread_id);
channel->revents = G_IO_OUT;
SetEvent (channel->data_avail_event);
LeaveCriticalSection (&channel->mutex);
WaitForSingleObject (channel->space_avail_event, INFINITE);
EnterCriticalSection (&channel->mutex);
if (channel->rdp == channel->wrp)
break;
if (channel->debug)
g_print ("write_thread %#x: rdp=%d, wrp=%d\n",
channel->thread_id, channel->rdp, channel->wrp);
}
buffer = channel->buffer + channel->rdp;
if (channel->rdp < channel->wrp)
nbytes = channel->wrp - channel->rdp;
else
nbytes = BUFFER_SIZE - channel->rdp;
if (channel->debug)
g_print ("write_thread %#x: calling write() for %d bytes\n",
channel->thread_id, nbytes);
LeaveCriticalSection (&channel->mutex);
nbytes = write (channel->fd, buffer, nbytes);
EnterCriticalSection (&channel->mutex);
if (channel->debug)
g_print ("write_thread %#x: write(%i) returned %d, rdp=%d, wrp=%d\n",
channel->thread_id, channel->fd, nbytes, channel->rdp, channel->wrp);
channel->revents = 0;
if (nbytes > 0)
channel->revents |= G_IO_OUT;
else if (nbytes <= 0)
channel->revents |= G_IO_ERR;
channel->rdp = (channel->rdp + nbytes) % BUFFER_SIZE;
if (nbytes <= 0)
break;
if (channel->debug)
g_print ("write_thread: setting data_avail for thread %#x\n",
channel->thread_id);
SetEvent (channel->data_avail_event);
}
channel->running = FALSE;
if (channel->needs_close)
{
if (channel->debug)
g_print ("write_thread %#x: channel fd %d needs closing\n",
channel->thread_id, channel->fd);
close (channel->fd);
channel->fd = -1;
}
LeaveCriticalSection (&channel->mutex);
g_io_channel_unref ((GIOChannel *)channel);
return 0;
}
static void
create_thread (GIOWin32Channel *channel,
GIOCondition condition,
unsigned (__stdcall *thread) (void *parameter))
{
HANDLE thread_handle;
int errsv;
thread_handle = (HANDLE) _beginthreadex (NULL, 0, thread, channel, 0,
&channel->thread_id);
errsv = errno;
if (thread_handle == 0)
g_warning ("Error creating thread: %s.",
g_strerror (errsv));
else if (!CloseHandle (thread_handle))
{
gchar *emsg = g_win32_error_message (GetLastError ());
g_warning ("Error closing thread handle: %s.", emsg);
g_free (emsg);
}
WaitForSingleObject (channel->space_avail_event, INFINITE);
}
static GIOStatus
buffer_read (GIOWin32Channel *channel,
gchar *dest,
gsize count,
gsize *bytes_read,
GError **err)
{
guint nbytes;
guint left = count;
EnterCriticalSection (&channel->mutex);
if (channel->debug)
g_print ("reading from thread %#x %" G_GSIZE_FORMAT " bytes, rdp=%d, wrp=%d\n",
channel->thread_id, count, channel->rdp, channel->wrp);
if (channel->wrp == channel->rdp)
{
LeaveCriticalSection (&channel->mutex);
if (channel->debug)
g_print ("waiting for data from thread %#x\n", channel->thread_id);
WaitForSingleObject (channel->data_avail_event, INFINITE);
if (channel->debug)
g_print ("done waiting for data from thread %#x\n", channel->thread_id);
EnterCriticalSection (&channel->mutex);
if (channel->wrp == channel->rdp && !channel->running)
{
if (channel->debug)
g_print ("wrp==rdp, !running\n");
LeaveCriticalSection (&channel->mutex);
*bytes_read = 0;
return G_IO_STATUS_EOF;
}
}
if (channel->rdp < channel->wrp)
nbytes = channel->wrp - channel->rdp;
else
nbytes = BUFFER_SIZE - channel->rdp;
LeaveCriticalSection (&channel->mutex);
nbytes = MIN (left, nbytes);
if (channel->debug)
g_print ("moving %d bytes from thread %#x\n",
nbytes, channel->thread_id);
memcpy (dest, channel->buffer + channel->rdp, nbytes);
dest += nbytes;
left -= nbytes;
EnterCriticalSection (&channel->mutex);
channel->rdp = (channel->rdp + nbytes) % BUFFER_SIZE;
if (channel->debug)
g_print ("setting space_avail for thread %#x\n", channel->thread_id);
SetEvent (channel->space_avail_event);
if (channel->debug)
g_print ("for thread %#x: rdp=%d, wrp=%d\n",
channel->thread_id, channel->rdp, channel->wrp);
if (channel->running && channel->wrp == channel->rdp)
{
if (channel->debug)
g_print ("resetting data_avail of thread %#x\n",
channel->thread_id);
ResetEvent (channel->data_avail_event);
};
LeaveCriticalSection (&channel->mutex);
/* We have no way to indicate any errors form the actual
* read() or recv() call in the reader thread. Should we have?
*/
*bytes_read = count - left;
return (*bytes_read > 0) ? G_IO_STATUS_NORMAL : G_IO_STATUS_EOF;
}
static GIOStatus
buffer_write (GIOWin32Channel *channel,
const gchar *dest,
gsize count,
gsize *bytes_written,
GError **err)
{
guint nbytes;
guint left = count;
EnterCriticalSection (&channel->mutex);
if (channel->debug)
g_print ("buffer_write: writing to thread %#x %" G_GSIZE_FORMAT " bytes, rdp=%d, wrp=%d\n",
channel->thread_id, count, channel->rdp, channel->wrp);
if ((channel->wrp + 1) % BUFFER_SIZE == channel->rdp)
{
/* Buffer is full */
if (channel->debug)
g_print ("buffer_write: tid %#x: resetting data_avail\n",
channel->thread_id);
ResetEvent (channel->data_avail_event);
if (channel->debug)
g_print ("buffer_write: tid %#x: waiting for space\n",
channel->thread_id);
LeaveCriticalSection (&channel->mutex);
WaitForSingleObject (channel->data_avail_event, INFINITE);
EnterCriticalSection (&channel->mutex);
if (channel->debug)
g_print ("buffer_write: tid %#x: rdp=%d, wrp=%d\n",
channel->thread_id, channel->rdp, channel->wrp);
}
nbytes = MIN ((channel->rdp + BUFFER_SIZE - channel->wrp - 1) % BUFFER_SIZE,
BUFFER_SIZE - channel->wrp);
LeaveCriticalSection (&channel->mutex);
nbytes = MIN (left, nbytes);
if (channel->debug)
g_print ("buffer_write: tid %#x: writing %d bytes\n",
channel->thread_id, nbytes);
memcpy (channel->buffer + channel->wrp, dest, nbytes);
dest += nbytes;
left -= nbytes;
EnterCriticalSection (&channel->mutex);
channel->wrp = (channel->wrp + nbytes) % BUFFER_SIZE;
if (channel->debug)
g_print ("buffer_write: tid %#x: rdp=%d, wrp=%d, setting space_avail\n",
channel->thread_id, channel->rdp, channel->wrp);
SetEvent (channel->space_avail_event);
if ((channel->wrp + 1) % BUFFER_SIZE == channel->rdp)
{
/* Buffer is full */
if (channel->debug)
g_print ("buffer_write: tid %#x: resetting data_avail\n",
channel->thread_id);
ResetEvent (channel->data_avail_event);
}
LeaveCriticalSection (&channel->mutex);
/* We have no way to indicate any errors form the actual
* write() call in the writer thread. Should we have?
*/
*bytes_written = count - left;
return (*bytes_written > 0) ? G_IO_STATUS_NORMAL : G_IO_STATUS_EOF;
}
static gboolean
g_io_win32_prepare (GSource *source,
gint *timeout)
{
GIOWin32Watch *watch = (GIOWin32Watch *)source;
GIOCondition buffer_condition = g_io_channel_get_buffer_condition (watch->channel);
GIOWin32Channel *channel = (GIOWin32Channel *)watch->channel;
int event_mask;
if (channel->debug)
g_print ("g_io_win32_prepare: source=%p channel=%p", source, channel);
switch (channel->type)
{
case G_IO_WIN32_WINDOWS_MESSAGES:
if (channel->debug)
g_print (" MSG");
break;
case G_IO_WIN32_CONSOLE:
if (channel->debug)
g_print (" CON");
break;
case G_IO_WIN32_FILE_DESC:
if (channel->debug)
g_print (" FD thread=%#x buffer_condition:{%s}"
"\n watch->pollfd.events:{%s} watch->pollfd.revents:{%s} channel->revents:{%s}",
channel->thread_id, condition_to_string (buffer_condition),
condition_to_string (watch->pollfd.events),
condition_to_string (watch->pollfd.revents),
condition_to_string (channel->revents));
EnterCriticalSection (&channel->mutex);
if (channel->running)
{
if (channel->direction == 0 && channel->wrp == channel->rdp)
{
if (channel->debug)
g_print ("\n setting revents=0");
channel->revents = 0;
}
}
else
{
if (channel->direction == 1
&& (channel->wrp + 1) % BUFFER_SIZE == channel->rdp)
{
if (channel->debug)
g_print ("\n setting revents=0");
channel->revents = 0;
}
}
LeaveCriticalSection (&channel->mutex);
break;
case G_IO_WIN32_SOCKET:
if (channel->debug)
g_print (" SOCK");
event_mask = 0;
if (watch->condition & G_IO_IN)
event_mask |= (FD_READ | FD_ACCEPT);
if (watch->condition & G_IO_OUT)
event_mask |= (FD_WRITE | FD_CONNECT);
event_mask |= FD_CLOSE;
if (channel->event_mask != event_mask)
{
if (channel->debug)
g_print ("\n WSAEventSelect(%d,%p,{%s})",
channel->fd, (HANDLE) watch->pollfd.fd,
event_mask_to_string (event_mask));
if (WSAEventSelect (channel->fd, (HANDLE) watch->pollfd.fd,
event_mask) == SOCKET_ERROR)
if (channel->debug)
{
gchar *emsg = g_win32_error_message (WSAGetLastError ());
g_print (" failed: %s", emsg);
g_free (emsg);
}
channel->event_mask = event_mask;
if (channel->debug)
g_print ("\n setting last_events=0");
channel->last_events = 0;
if ((event_mask & FD_WRITE) &&
channel->ever_writable &&
!channel->write_would_have_blocked)
{
if (channel->debug)
g_print (" WSASetEvent(%p)", (WSAEVENT) watch->pollfd.fd);
WSASetEvent ((WSAEVENT) watch->pollfd.fd);
}
}
break;
default:
g_assert_not_reached ();
g_abort ();
}
if (channel->debug)
g_print ("\n");
return ((watch->condition & buffer_condition) == watch->condition);
}
static gboolean
g_io_win32_check (GSource *source)
{
MSG msg;
GIOWin32Watch *watch = (GIOWin32Watch *)source;
GIOWin32Channel *channel = (GIOWin32Channel *)watch->channel;
GIOCondition buffer_condition = g_io_channel_get_buffer_condition (watch->channel);
WSANETWORKEVENTS events = { 0 };
if (channel->debug)
g_print ("g_io_win32_check: source=%p channel=%p", source, channel);
switch (channel->type)
{
case G_IO_WIN32_WINDOWS_MESSAGES:
if (channel->debug)
g_print (" MSG\n");
return (PeekMessage (&msg, channel->hwnd, 0, 0, PM_NOREMOVE));
case G_IO_WIN32_FILE_DESC:
if (channel->debug)
g_print (" FD thread=%#x buffer_condition=%s\n"
" watch->pollfd.events={%s} watch->pollfd.revents={%s} channel->revents={%s}\n",
channel->thread_id, condition_to_string (buffer_condition),
condition_to_string (watch->pollfd.events),
condition_to_string (watch->pollfd.revents),
condition_to_string (channel->revents));
watch->pollfd.revents = (watch->pollfd.events & channel->revents);
return ((watch->pollfd.revents | buffer_condition) & watch->condition);
case G_IO_WIN32_CONSOLE:
if (channel->debug)
g_print (" CON\n");
if (watch->channel->is_writeable)
return TRUE;
else if (watch->channel->is_readable)
{
INPUT_RECORD buffer;
DWORD n;
if (PeekConsoleInput ((HANDLE) watch->pollfd.fd, &buffer, 1, &n) &&
n == 1)
{
/* _kbhit() does quite complex processing to find out
* whether at least one of the key events pending corresponds
* to a "real" character that can be read.
*/
if (_kbhit ())
return TRUE;
/* Discard all other kinds of events */
ReadConsoleInput ((HANDLE) watch->pollfd.fd, &buffer, 1, &n);
}
}
return FALSE;
case G_IO_WIN32_SOCKET:
if (channel->debug)
g_print (" SOCK");
if (channel->last_events & FD_WRITE)
{
if (channel->debug)
g_print (" sock=%d event=%p last_events has FD_WRITE",
channel->fd, (HANDLE) watch->pollfd.fd);
}
else
{
WSAEnumNetworkEvents (channel->fd, 0, &events);
if (channel->debug)
g_print ("\n revents={%s} condition={%s}"
"\n WSAEnumNetworkEvents(%d,0) sets events={%s}",
condition_to_string (watch->pollfd.revents),
condition_to_string (watch->condition),
channel->fd,
event_mask_to_string (events.lNetworkEvents));
if (watch->pollfd.revents != 0 &&
events.lNetworkEvents == 0 &&
!(channel->event_mask & FD_WRITE))
{
channel->event_mask = 0;
if (channel->debug)
g_print ("\n WSAEventSelect(%d,%p,{})",
channel->fd, (HANDLE) watch->pollfd.fd);
WSAEventSelect (channel->fd, (HANDLE) watch->pollfd.fd, 0);
if (channel->debug)
g_print (" ResetEvent(%p)",
(HANDLE) watch->pollfd.fd);
ResetEvent ((HANDLE) watch->pollfd.fd);
}
else if (events.lNetworkEvents & FD_WRITE)
channel->ever_writable = TRUE;
channel->last_events = events.lNetworkEvents;
}
watch->pollfd.revents = 0;
if (channel->last_events & (FD_READ | FD_ACCEPT))
watch->pollfd.revents |= G_IO_IN;
if (channel->last_events & FD_WRITE)
watch->pollfd.revents |= G_IO_OUT;
else
{
/* We have called WSAEnumNetworkEvents() above but it didn't
* set FD_WRITE.
*/
if (events.lNetworkEvents & FD_CONNECT)
{
if (events.iErrorCode[FD_CONNECT_BIT] == 0)
watch->pollfd.revents |= G_IO_OUT;
else
watch->pollfd.revents |= (G_IO_HUP | G_IO_ERR);
}
if (watch->pollfd.revents == 0 && (channel->last_events & (FD_CLOSE)))
watch->pollfd.revents |= G_IO_HUP;
}
/* Regardless of WSAEnumNetworkEvents() result, if watching for
* writability, and if we have ever got a FD_WRITE event, and
* unless last write would have blocked, set G_IO_OUT. But never
* set both G_IO_OUT and G_IO_HUP.
*/
if (!(watch->pollfd.revents & G_IO_HUP) &&
channel->ever_writable &&
!channel->write_would_have_blocked &&
(channel->event_mask & FD_WRITE))
watch->pollfd.revents |= G_IO_OUT;
if (channel->debug)
g_print ("\n revents={%s} retval={%s}\n",
condition_to_string (watch->pollfd.revents),
condition_to_string ((watch->pollfd.revents | buffer_condition) & watch->condition));
return ((watch->pollfd.revents | buffer_condition) & watch->condition);
default:
g_assert_not_reached ();
g_abort ();
}
}
static gboolean
g_io_win32_dispatch (GSource *source,
GSourceFunc callback,
gpointer user_data)
{
GIOFunc func = (GIOFunc)callback;
GIOWin32Watch *watch = (GIOWin32Watch *)source;
GIOWin32Channel *channel = (GIOWin32Channel *)watch->channel;
GIOCondition buffer_condition = g_io_channel_get_buffer_condition (watch->channel);
if (!func)
{
g_warning ("IO Watch dispatched without callback. "
"You must call g_source_connect().");
return FALSE;
}
if (channel->debug)
g_print ("g_io_win32_dispatch: pollfd.revents=%s condition=%s result=%s\n",
condition_to_string (watch->pollfd.revents),
condition_to_string (watch->condition),
condition_to_string ((watch->pollfd.revents | buffer_condition) & watch->condition));
return (*func) (watch->channel,
(watch->pollfd.revents | buffer_condition) & watch->condition,
user_data);
}
static void
g_io_win32_finalize (GSource *source)
{
GIOWin32Watch *watch = (GIOWin32Watch *)source;
GIOWin32Channel *channel = (GIOWin32Channel *)watch->channel;
if (channel->debug)
g_print ("g_io_win32_finalize: source=%p channel=%p", source, channel);
switch (channel->type)
{
case G_IO_WIN32_WINDOWS_MESSAGES:
if (channel->debug)
g_print (" MSG");
break;
case G_IO_WIN32_CONSOLE:
if (channel->debug)
g_print (" CON");
break;
case G_IO_WIN32_FILE_DESC:
if (channel->debug)
g_print (" FD thread=%#x", channel->thread_id);
break;
case G_IO_WIN32_SOCKET:
if (channel->debug)
g_print (" SOCK sock=%d", channel->fd);
break;
default:
g_assert_not_reached ();
g_abort ();
}
if (channel->debug)
g_print ("\n");
g_io_channel_unref (watch->channel);
}
GSourceFuncs g_io_watch_funcs = {
g_io_win32_prepare,
g_io_win32_check,
g_io_win32_dispatch,
g_io_win32_finalize,
NULL,
NULL
};
static GIOStatus
g_io_win32_msg_read (GIOChannel *channel,
gchar *buf,
gsize count,
gsize *bytes_read,
GError **err)
{
GIOWin32Channel *win32_channel = (GIOWin32Channel *)channel;
MSG msg; /* In case of alignment problems */
*bytes_read = 0;
if (count < sizeof (MSG))
{
g_set_error_literal (err, G_IO_CHANNEL_ERROR, G_IO_CHANNEL_ERROR_INVAL,
"Incorrect message size"); /* Informative enough error message? */
return G_IO_STATUS_ERROR;
}
if (win32_channel->debug)
g_print ("g_io_win32_msg_read: channel=%p hwnd=%p\n",
channel, win32_channel->hwnd);
if (!PeekMessage (&msg, win32_channel->hwnd, 0, 0, PM_REMOVE))
return G_IO_STATUS_AGAIN;
memmove (buf, &msg, sizeof (MSG));
*bytes_read = sizeof (MSG);
return G_IO_STATUS_NORMAL;
}
static GIOStatus
g_io_win32_msg_write (GIOChannel *channel,
const gchar *buf,
gsize count,
gsize *bytes_written,
GError **err)
{
GIOWin32Channel *win32_channel = (GIOWin32Channel *)channel;
MSG msg;
*bytes_written = 0;
if (count != sizeof (MSG))
{
g_set_error_literal (err, G_IO_CHANNEL_ERROR, G_IO_CHANNEL_ERROR_INVAL,
"Incorrect message size"); /* Informative enough error message? */
return G_IO_STATUS_ERROR;
}
/* In case of alignment problems */
memmove (&msg, buf, sizeof (MSG));
if (!PostMessage (win32_channel->hwnd, msg.message, msg.wParam, msg.lParam))
{
gchar *emsg = g_win32_error_message (GetLastError ());
g_set_error_literal (err, G_IO_CHANNEL_ERROR, G_IO_CHANNEL_ERROR_FAILED, emsg);
g_free (emsg);
return G_IO_STATUS_ERROR;
}
*bytes_written = sizeof (MSG);
return G_IO_STATUS_NORMAL;
}
static GIOStatus
g_io_win32_msg_close (GIOChannel *channel,
GError **err)
{
/* Nothing to be done. Or should we set hwnd to some invalid value? */
return G_IO_STATUS_NORMAL;
}
static void
g_io_win32_free (GIOChannel *channel)
{
GIOWin32Channel *win32_channel = (GIOWin32Channel *)channel;
if (win32_channel->debug)
g_print ("g_io_win32_free channel=%p fd=%d\n", channel, win32_channel->fd);
DeleteCriticalSection (&win32_channel->mutex);
if (win32_channel->data_avail_event)
if (!CloseHandle (win32_channel->data_avail_event))
if (win32_channel->debug)
{
gchar *emsg = g_win32_error_message (GetLastError ());
g_print (" CloseHandle(%p) failed: %s\n",
win32_channel->data_avail_event, emsg);
g_free (emsg);
}
g_free (win32_channel->buffer);
if (win32_channel->space_avail_event)
if (!CloseHandle (win32_channel->space_avail_event))
if (win32_channel->debug)
{
gchar *emsg = g_win32_error_message (GetLastError ());
g_print (" CloseHandle(%p) failed: %s\n",
win32_channel->space_avail_event, emsg);
g_free (emsg);
}
if (win32_channel->type == G_IO_WIN32_SOCKET &&
win32_channel->fd != -1)
if (WSAEventSelect (win32_channel->fd, NULL, 0) == SOCKET_ERROR)
if (win32_channel->debug)
{
gchar *emsg = g_win32_error_message (WSAGetLastError ());
g_print (" WSAEventSelect(%d,NULL,{}) failed: %s\n",
win32_channel->fd, emsg);
g_free (emsg);
}
if (win32_channel->event)
if (!WSACloseEvent (win32_channel->event))
if (win32_channel->debug)
{
gchar *emsg = g_win32_error_message (WSAGetLastError ());
g_print (" WSACloseEvent(%p) failed: %s\n",
win32_channel->event, emsg);
g_free (emsg);
}
g_free (win32_channel);
}
static GSource *
g_io_win32_msg_create_watch (GIOChannel *channel,
GIOCondition condition)
{
GIOWin32Watch *watch;
GSource *source;
source = g_source_new (&g_io_watch_funcs, sizeof (GIOWin32Watch));
g_source_set_static_name (source, "GIOChannel (Win32)");
watch = (GIOWin32Watch *)source;
watch->channel = channel;
g_io_channel_ref (channel);
watch->condition = condition;
watch->pollfd.fd = (gintptr) G_WIN32_MSG_HANDLE;
watch->pollfd.events = condition;
g_source_add_poll (source, &watch->pollfd);
return source;
}
static GIOStatus
g_io_win32_fd_and_console_read (GIOChannel *channel,
gchar *buf,
gsize count,
gsize *bytes_read,
GError **err)
{
GIOWin32Channel *win32_channel = (GIOWin32Channel *)channel;
gint result;
int errsv;
if (win32_channel->debug)
g_print ("g_io_win32_fd_read: fd=%d count=%" G_GSIZE_FORMAT "\n",
win32_channel->fd, count);
if (win32_channel->thread_id)
{
return buffer_read (win32_channel, buf, count, bytes_read, err);
}
result = read (win32_channel->fd, buf, count);
errsv = errno;
if (win32_channel->debug)
g_print ("g_io_win32_fd_read: read() => %d\n", result);
if (result < 0)
{
*bytes_read = 0;
switch (errsv)
{
#ifdef EAGAIN
case EAGAIN:
return G_IO_STATUS_AGAIN;
#endif
default:
g_set_error_literal (err, G_IO_CHANNEL_ERROR,
g_io_channel_error_from_errno (errsv),
g_strerror (errsv));
return G_IO_STATUS_ERROR;
}
}
*bytes_read = result;
return (result > 0) ? G_IO_STATUS_NORMAL : G_IO_STATUS_EOF;
}
static GIOStatus
g_io_win32_fd_and_console_write (GIOChannel *channel,
const gchar *buf,
gsize count,
gsize *bytes_written,
GError **err)
{
GIOWin32Channel *win32_channel = (GIOWin32Channel *)channel;
gint result;
int errsv;
if (win32_channel->thread_id)
{
return buffer_write (win32_channel, buf, count, bytes_written, err);
}
result = write (win32_channel->fd, buf, count);
errsv = errno;
if (win32_channel->debug)
g_print ("g_io_win32_fd_write: fd=%d count=%" G_GSIZE_FORMAT " => %d\n",
win32_channel->fd, count, result);
if (result < 0)
{
*bytes_written = 0;
switch (errsv)
{
#ifdef EAGAIN
case EAGAIN:
return G_IO_STATUS_AGAIN;
#endif
default:
g_set_error_literal (err, G_IO_CHANNEL_ERROR,
g_io_channel_error_from_errno (errsv),
g_strerror (errsv));
return G_IO_STATUS_ERROR;
}
}
*bytes_written = result;
return G_IO_STATUS_NORMAL;
}
static GIOStatus
g_io_win32_fd_seek (GIOChannel *channel,
gint64 offset,
GSeekType type,
GError **err)
{
GIOWin32Channel *win32_channel = (GIOWin32Channel *)channel;
int whence, errsv;
gint64 result;
switch (type)
{
case G_SEEK_SET:
whence = SEEK_SET;
break;
case G_SEEK_CUR:
whence = SEEK_CUR;
break;
case G_SEEK_END:
whence = SEEK_END;
break;
default:
whence = -1; /* Keep the compiler quiet */
g_assert_not_reached ();
g_abort ();
}
result = _lseeki64 (win32_channel->fd, offset, whence);
errsv = errno;
if (result < 0)
{
g_set_error_literal (err, G_IO_CHANNEL_ERROR,
g_io_channel_error_from_errno (errsv),
g_strerror (errsv));
return G_IO_STATUS_ERROR;
}
return G_IO_STATUS_NORMAL;
}
static GIOStatus
g_io_win32_fd_close (GIOChannel *channel,
GError **err)
{
GIOWin32Channel *win32_channel = (GIOWin32Channel *)channel;
if (win32_channel->debug)
g_print ("g_io_win32_fd_close: thread=%#x: fd=%d\n",
win32_channel->thread_id,
win32_channel->fd);
EnterCriticalSection (&win32_channel->mutex);
if (win32_channel->running)
{
if (win32_channel->debug)
g_print ("thread %#x: running, marking fd %d for later close\n",
win32_channel->thread_id, win32_channel->fd);
win32_channel->running = FALSE;
win32_channel->needs_close = TRUE;
if (win32_channel->direction == 0)
SetEvent (win32_channel->data_avail_event);
else
SetEvent (win32_channel->space_avail_event);
}
else
{
if (win32_channel->debug)
g_print ("closing fd %d\n", win32_channel->fd);
close (win32_channel->fd);
if (win32_channel->debug)
g_print ("closed fd %d, setting to -1\n",
win32_channel->fd);
win32_channel->fd = -1;
}
LeaveCriticalSection (&win32_channel->mutex);
/* FIXME error detection? */
return G_IO_STATUS_NORMAL;
}
static GSource *
g_io_win32_fd_create_watch (GIOChannel *channel,
GIOCondition condition)
{
GIOWin32Channel *win32_channel = (GIOWin32Channel *)channel;
GSource *source = g_source_new (&g_io_watch_funcs, sizeof (GIOWin32Watch));
GIOWin32Watch *watch = (GIOWin32Watch *)source;
watch->channel = channel;
g_io_channel_ref (channel);
watch->condition = condition;
if (win32_channel->data_avail_event == NULL)
create_events (win32_channel);
watch->pollfd.fd = (gintptr) win32_channel->data_avail_event;
watch->pollfd.events = condition;
if (win32_channel->debug)
g_print ("g_io_win32_fd_create_watch: channel=%p fd=%d condition={%s} event=%p\n",
channel, win32_channel->fd,
condition_to_string (condition), (HANDLE) watch->pollfd.fd);
EnterCriticalSection (&win32_channel->mutex);
if (win32_channel->thread_id == 0)
{
if (condition & G_IO_IN)
create_thread (win32_channel, condition, read_thread);
else if (condition & G_IO_OUT)
create_thread (win32_channel, condition, write_thread);
}
g_source_add_poll (source, &watch->pollfd);
LeaveCriticalSection (&win32_channel->mutex);
return source;
}
static GIOStatus
g_io_win32_console_close (GIOChannel *channel,
GError **err)
{
GIOWin32Channel *win32_channel = (GIOWin32Channel *)channel;
if (close (win32_channel->fd) < 0)
{
int errsv = errno;
g_set_error_literal (err, G_IO_CHANNEL_ERROR,
g_io_channel_error_from_errno (errsv),
g_strerror (errsv));
return G_IO_STATUS_ERROR;
}
return G_IO_STATUS_NORMAL;
}
static GSource *
g_io_win32_console_create_watch (GIOChannel *channel,
GIOCondition condition)
{
GIOWin32Channel *win32_channel = (GIOWin32Channel *)channel;
GSource *source = g_source_new (&g_io_watch_funcs, sizeof (GIOWin32Watch));
GIOWin32Watch *watch = (GIOWin32Watch *)source;
watch->channel = channel;
g_io_channel_ref (channel);
watch->condition = condition;
watch->pollfd.fd = _get_osfhandle (win32_channel->fd);
watch->pollfd.events = condition;
g_source_add_poll (source, &watch->pollfd);
return source;
}
static GIOStatus
g_io_win32_sock_read (GIOChannel *channel,
gchar *buf,
gsize count,
gsize *bytes_read,
GError **err)
{
GIOWin32Channel *win32_channel = (GIOWin32Channel *)channel;
gint result;
GIOChannelError error;
int winsock_error = 0;
if (win32_channel->debug)
g_print ("g_io_win32_sock_read: channel=%p sock=%d count=%" G_GSIZE_FORMAT,
channel, win32_channel->fd, count);
result = recv (win32_channel->fd, buf, count, 0);
if (result == SOCKET_ERROR)
winsock_error = WSAGetLastError ();
if (win32_channel->debug)
g_print (" recv=%d", result);
if (result == SOCKET_ERROR)
{
gchar *emsg = g_win32_error_message (winsock_error);
if (win32_channel->debug)
g_print (" %s\n", emsg);
*bytes_read = 0;
switch (winsock_error)
{
case WSAEINVAL:
error = G_IO_CHANNEL_ERROR_INVAL;
break;
case WSAEWOULDBLOCK:
g_free (emsg);
return G_IO_STATUS_AGAIN;
default:
error = G_IO_CHANNEL_ERROR_FAILED;
break;
}
g_set_error_literal (err, G_IO_CHANNEL_ERROR, error, emsg);
g_free (emsg);
return G_IO_STATUS_ERROR;
}
else
{
if (win32_channel->debug)
g_print ("\n");
*bytes_read = result;
if (result == 0)
return G_IO_STATUS_EOF;
else
return G_IO_STATUS_NORMAL;
}
}
static GIOStatus
g_io_win32_sock_write (GIOChannel *channel,
const gchar *buf,
gsize count,
gsize *bytes_written,
GError **err)
{
GIOWin32Channel *win32_channel = (GIOWin32Channel *)channel;
gint result;
GIOChannelError error;
int winsock_error = 0;
if (win32_channel->debug)
g_print ("g_io_win32_sock_write: channel=%p sock=%d count=%" G_GSIZE_FORMAT,
channel, win32_channel->fd, count);
result = send (win32_channel->fd, buf, count, 0);
if (result == SOCKET_ERROR)
winsock_error = WSAGetLastError ();
if (win32_channel->debug)
g_print (" send=%d", result);
if (result == SOCKET_ERROR)
{
gchar *emsg = g_win32_error_message (winsock_error);
if (win32_channel->debug)
g_print (" %s\n", emsg);
*bytes_written = 0;
switch (winsock_error)
{
case WSAEINVAL:
error = G_IO_CHANNEL_ERROR_INVAL;
break;
case WSAEWOULDBLOCK:
win32_channel->write_would_have_blocked = TRUE;
win32_channel->last_events = 0;
g_free (emsg);
return G_IO_STATUS_AGAIN;
default:
error = G_IO_CHANNEL_ERROR_FAILED;
break;
}
g_set_error_literal (err, G_IO_CHANNEL_ERROR, error, emsg);
g_free (emsg);
return G_IO_STATUS_ERROR;
}
else
{
if (win32_channel->debug)
g_print ("\n");
*bytes_written = result;
win32_channel->write_would_have_blocked = FALSE;
return G_IO_STATUS_NORMAL;
}
}
static GIOStatus
g_io_win32_sock_close (GIOChannel *channel,
GError **err)
{
GIOWin32Channel *win32_channel = (GIOWin32Channel *)channel;
if (win32_channel->fd != -1)
{
if (win32_channel->debug)
g_print ("g_io_win32_sock_close: channel=%p sock=%d\n",
channel, win32_channel->fd);
closesocket (win32_channel->fd);
win32_channel->fd = -1;
}
/* FIXME error detection? */
return G_IO_STATUS_NORMAL;
}
static GSource *
g_io_win32_sock_create_watch (GIOChannel *channel,
GIOCondition condition)
{
GIOWin32Channel *win32_channel = (GIOWin32Channel *)channel;
GSource *source = g_source_new (&g_io_watch_funcs, sizeof (GIOWin32Watch));
GIOWin32Watch *watch = (GIOWin32Watch *)source;
watch->channel = channel;
g_io_channel_ref (channel);
watch->condition = condition;
if (win32_channel->event == 0)
win32_channel->event = WSACreateEvent ();
watch->pollfd.fd = (gintptr) win32_channel->event;
watch->pollfd.events = condition;
if (win32_channel->debug)
g_print ("g_io_win32_sock_create_watch: channel=%p sock=%d event=%p condition={%s}\n",
channel, win32_channel->fd, (HANDLE) watch->pollfd.fd,
condition_to_string (watch->condition));
g_source_add_poll (source, &watch->pollfd);
return source;
}
GIOChannel *
g_io_channel_new_file (const gchar *filename,
const gchar *mode,
GError **error)
{
int fid, flags, pmode;
GIOChannel *channel;
enum { /* Cheesy hack */
MODE_R = 1 << 0,
MODE_W = 1 << 1,
MODE_A = 1 << 2,
MODE_PLUS = 1 << 3,
};
int mode_num, errsv;
g_return_val_if_fail (filename != NULL, NULL);
g_return_val_if_fail (mode != NULL, NULL);
g_return_val_if_fail ((error == NULL) || (*error == NULL), NULL);
switch (mode[0])
{
case 'r':
mode_num = MODE_R;
break;
case 'w':
mode_num = MODE_W;
break;
case 'a':
mode_num = MODE_A;
break;
default:
g_warning ("Invalid GIOFileMode %s.", mode);
return NULL;
}
switch (mode[1])
{
case '\0':
break;
case '+':
if (mode[2] == '\0')
{
mode_num |= MODE_PLUS;
break;
}
G_GNUC_FALLTHROUGH;
default:
g_warning ("Invalid GIOFileMode %s.", mode);
return NULL;
}
switch (mode_num)
{
case MODE_R:
flags = O_RDONLY;
pmode = _S_IREAD;
break;
case MODE_W:
flags = O_WRONLY | O_TRUNC | O_CREAT;
pmode = _S_IWRITE;
break;
case MODE_A:
flags = O_WRONLY | O_APPEND | O_CREAT;
pmode = _S_IWRITE;
break;
case MODE_R | MODE_PLUS:
flags = O_RDWR;
pmode = _S_IREAD | _S_IWRITE;
break;
case MODE_W | MODE_PLUS:
flags = O_RDWR | O_TRUNC | O_CREAT;
pmode = _S_IREAD | _S_IWRITE;
break;
case MODE_A | MODE_PLUS:
flags = O_RDWR | O_APPEND | O_CREAT;
pmode = _S_IREAD | _S_IWRITE;
break;
default:
g_assert_not_reached ();
g_abort ();
}
/* always open 'untranslated' */
fid = g_open (filename, flags | _O_BINARY, pmode);
errsv = errno;
if (g_io_win32_get_debug_flag ())
{
g_print ("g_io_channel_win32_new_file: open(\"%s\",", filename);
g_win32_print_access_mode (flags|_O_BINARY);
g_print (",%#o)=%d\n", pmode, fid);
}
if (fid < 0)
{
g_set_error_literal (error, G_FILE_ERROR,
g_file_error_from_errno (errsv),
g_strerror (errsv));
return (GIOChannel *)NULL;
}
channel = g_io_channel_win32_new_fd (fid);
/* XXX: move this to g_io_channel_win32_new_fd () */
channel->close_on_unref = TRUE;
channel->is_seekable = TRUE;
/* g_io_channel_win32_new_fd sets is_readable and is_writeable to
* correspond to actual readability/writeability. Set to FALSE those
* that mode doesn't allow
*/
switch (mode_num)
{
case MODE_R:
channel->is_writeable = FALSE;
break;
case MODE_W:
case MODE_A:
channel->is_readable = FALSE;
break;
case MODE_R | MODE_PLUS:
case MODE_W | MODE_PLUS:
case MODE_A | MODE_PLUS:
break;
default:
g_assert_not_reached ();
g_abort ();
}
return channel;
}
static GIOStatus
g_io_win32_unimpl_set_flags (GIOChannel *channel,
GIOFlags flags,
GError **err)
{
GIOWin32Channel *win32_channel = (GIOWin32Channel *)channel;
if (win32_channel->debug)
{
g_print ("g_io_win32_unimpl_set_flags: ");
g_win32_print_gioflags (flags);
g_print ("\n");
}
g_set_error_literal (err, G_IO_CHANNEL_ERROR,
G_IO_CHANNEL_ERROR_FAILED,
"Not implemented on Win32");
return G_IO_STATUS_ERROR;
}
static GIOFlags
g_io_win32_fd_get_flags_internal (GIOChannel *channel,
struct _stati64 *st)
{
GIOWin32Channel *win32_channel = (GIOWin32Channel *) channel;
gchar c;
DWORD count;
if (st->st_mode & _S_IFIFO)
{
channel->is_readable =
(PeekNamedPipe ((HANDLE) _get_osfhandle (win32_channel->fd), &c, 0, &count, NULL, NULL) != 0) || GetLastError () == ERROR_BROKEN_PIPE;
channel->is_writeable =
(WriteFile ((HANDLE) _get_osfhandle (win32_channel->fd), &c, 0, &count, NULL) != 0);
channel->is_seekable = FALSE;
}
else
{
channel->is_readable =
(ReadFile ((HANDLE) _get_osfhandle (win32_channel->fd), &c, 0, &count, NULL) != 0);
channel->is_writeable =
(WriteFile ((HANDLE) _get_osfhandle (win32_channel->fd), &c, 0, &count, NULL) != 0);
channel->is_seekable = TRUE;
}
/* XXX: G_IO_FLAG_APPEND */
/* XXX: G_IO_FLAG_NONBLOCK */
return 0;
}
static GIOFlags
g_io_win32_fd_get_flags (GIOChannel *channel)
{
struct _stati64 st;
GIOWin32Channel *win32_channel = (GIOWin32Channel *)channel;
g_return_val_if_fail (win32_channel != NULL, 0);
g_return_val_if_fail (win32_channel->type == G_IO_WIN32_FILE_DESC, 0);
if (0 == _fstati64 (win32_channel->fd, &st))
return g_io_win32_fd_get_flags_internal (channel, &st);
else
return 0;
}
static GIOFlags
g_io_win32_console_get_flags_internal (GIOChannel *channel)
{
GIOWin32Channel *win32_channel = (GIOWin32Channel *) channel;
HANDLE handle = (HANDLE) _get_osfhandle (win32_channel->fd);
gchar c;
DWORD count;
INPUT_RECORD record;
channel->is_readable = PeekConsoleInput (handle, &record, 1, &count);
channel->is_writeable = WriteFile (handle, &c, 0, &count, NULL);
channel->is_seekable = FALSE;
return 0;
}
static GIOFlags
g_io_win32_console_get_flags (GIOChannel *channel)
{
GIOWin32Channel *win32_channel = (GIOWin32Channel *)channel;
g_return_val_if_fail (win32_channel != NULL, 0);
g_return_val_if_fail (win32_channel->type == G_IO_WIN32_CONSOLE, 0);
return g_io_win32_console_get_flags_internal (channel);
}
static GIOFlags
g_io_win32_msg_get_flags (GIOChannel *channel)
{
return 0;
}
static GIOStatus
g_io_win32_sock_set_flags (GIOChannel *channel,
GIOFlags flags,
GError **err)
{
GIOWin32Channel *win32_channel = (GIOWin32Channel *)channel;
u_long arg;
if (win32_channel->debug)
{
g_print ("g_io_win32_sock_set_flags: ");
g_win32_print_gioflags (flags);
g_print ("\n");
}
if (flags & G_IO_FLAG_NONBLOCK)
{
arg = 1;
if (ioctlsocket (win32_channel->fd, FIONBIO, &arg) == SOCKET_ERROR)
{
gchar *emsg = g_win32_error_message (WSAGetLastError ());
g_set_error_literal (err, G_IO_CHANNEL_ERROR,
G_IO_CHANNEL_ERROR_FAILED,
emsg);
g_free (emsg);
return G_IO_STATUS_ERROR;
}
}
else
{
arg = 0;
if (ioctlsocket (win32_channel->fd, FIONBIO, &arg) == SOCKET_ERROR)
{
gchar *emsg = g_win32_error_message (WSAGetLastError ());
g_set_error_literal (err, G_IO_CHANNEL_ERROR,
G_IO_CHANNEL_ERROR_FAILED,
emsg);
g_free (emsg);
return G_IO_STATUS_ERROR;
}
}
return G_IO_STATUS_NORMAL;
}
static GIOFlags
g_io_win32_sock_get_flags (GIOChannel *channel)
{
/* Could we do something here? */
return 0;
}
static GIOFuncs win32_channel_msg_funcs = {
g_io_win32_msg_read,
g_io_win32_msg_write,
NULL,
g_io_win32_msg_close,
g_io_win32_msg_create_watch,
g_io_win32_free,
g_io_win32_unimpl_set_flags,
g_io_win32_msg_get_flags,
};
static GIOFuncs win32_channel_fd_funcs = {
g_io_win32_fd_and_console_read,
g_io_win32_fd_and_console_write,
g_io_win32_fd_seek,
g_io_win32_fd_close,
g_io_win32_fd_create_watch,
g_io_win32_free,
g_io_win32_unimpl_set_flags,
g_io_win32_fd_get_flags,
};
static GIOFuncs win32_channel_console_funcs = {
g_io_win32_fd_and_console_read,
g_io_win32_fd_and_console_write,
NULL,
g_io_win32_console_close,
g_io_win32_console_create_watch,
g_io_win32_free,
g_io_win32_unimpl_set_flags,
g_io_win32_console_get_flags,
};
static GIOFuncs win32_channel_sock_funcs = {
g_io_win32_sock_read,
g_io_win32_sock_write,
NULL,
g_io_win32_sock_close,
g_io_win32_sock_create_watch,
g_io_win32_free,
g_io_win32_sock_set_flags,
g_io_win32_sock_get_flags,
};
/**
* g_io_channel_win32_new_messages:
* @hwnd: a window handle.
*
* Creates a new #GIOChannel given a window handle on Windows.
*
* This function creates a #GIOChannel that can be used to poll for
* Windows messages for the window in question.
*
* Returns: a new #GIOChannel.
**/
GIOChannel *
#if GLIB_SIZEOF_VOID_P == 8
g_io_channel_win32_new_messages (gsize hwnd)
#else
g_io_channel_win32_new_messages (guint hwnd)
#endif
{
GIOWin32Channel *win32_channel = g_new (GIOWin32Channel, 1);
GIOChannel *channel = (GIOChannel *)win32_channel;
g_io_channel_init (channel);
g_io_channel_win32_init (win32_channel);
if (win32_channel->debug)
g_print ("g_io_channel_win32_new_messages: channel=%p hwnd=%p\n",
channel, (HWND) hwnd);
channel->funcs = &win32_channel_msg_funcs;
win32_channel->type = G_IO_WIN32_WINDOWS_MESSAGES;
win32_channel->hwnd = (HWND) hwnd;
/* XXX: check this. */
channel->is_readable = IsWindow (win32_channel->hwnd);
channel->is_writeable = IsWindow (win32_channel->hwnd);
channel->is_seekable = FALSE;
return channel;
}
static GIOChannel *
g_io_channel_win32_new_fd_internal (gint fd,
struct _stati64 *st)
{
GIOWin32Channel *win32_channel;
GIOChannel *channel;
win32_channel = g_new (GIOWin32Channel, 1);
channel = (GIOChannel *)win32_channel;
g_io_channel_init (channel);
g_io_channel_win32_init (win32_channel);
win32_channel->fd = fd;
if (win32_channel->debug)
g_print ("g_io_channel_win32_new_fd: channel=%p fd=%u\n",
channel, fd);
if (st->st_mode & _S_IFCHR) /* console */
{
channel->funcs = &win32_channel_console_funcs;
win32_channel->type = G_IO_WIN32_CONSOLE;
g_io_win32_console_get_flags_internal (channel);
}
else
{
channel->funcs = &win32_channel_fd_funcs;
win32_channel->type = G_IO_WIN32_FILE_DESC;
g_io_win32_fd_get_flags_internal (channel, st);
}
return channel;
}
/**
* g_io_channel_win32_new_fd:
* @fd: a C library file descriptor.
*
* Creates a new #GIOChannel given a file descriptor on Windows. This
* works for file descriptors from the C runtime.
*
* This function works for file descriptors as returned by the open(),
* creat(), pipe() and fileno() calls in the Microsoft C runtime. In
* order to meaningfully use this function your code should use the
* same C runtime as GLib uses, which is msvcrt.dll. Note that in
* current Microsoft compilers it is near impossible to convince it to
* build code that would use msvcrt.dll. The last Microsoft compiler
* version that supported using msvcrt.dll as the C runtime was version 6.
* The GNU compiler and toolchain for Windows, also known as Mingw,
* fully supports msvcrt.dll.
*
* If you have created a #GIOChannel for a file descriptor and started
* watching (polling) it, you shouldn't call read() on the file
* descriptor. This is because adding polling for a file descriptor is
* implemented in GLib on Windows by starting a thread that sits
* blocked in a read() from the file descriptor most of the time. All
* reads from the file descriptor should be done by this internal GLib
* thread. Your code should call only g_io_channel_read().
*
* This function is available only in GLib on Windows.
*
* Returns: a new #GIOChannel.
**/
GIOChannel *
g_io_channel_win32_new_fd (gint fd)
{
struct _stati64 st;
if (_fstati64 (fd, &st) == -1)
{
g_warning ("g_io_channel_win32_new_fd: %d isn't an open file descriptor in the C library GLib uses.", fd);
return NULL;
}
return g_io_channel_win32_new_fd_internal (fd, &st);
}
gint
g_io_channel_win32_get_fd (GIOChannel *channel)
{
GIOWin32Channel *win32_channel = (GIOWin32Channel *)channel;
return win32_channel->fd;
}
/**
* g_io_channel_win32_new_socket:
* @socket: a Winsock socket
*
* Creates a new #GIOChannel given a socket on Windows.
*
* This function works for sockets created by Winsock. It's available
* only in GLib on Windows.
*
* Polling a #GSource created to watch a channel for a socket puts the
* socket in non-blocking mode. This is a side-effect of the
* implementation and unavoidable.
*
* Returns: a new #GIOChannel
**/
GIOChannel *
g_io_channel_win32_new_socket (int socket)
{
GIOWin32Channel *win32_channel = g_new (GIOWin32Channel, 1);
GIOChannel *channel = (GIOChannel *)win32_channel;
g_io_channel_init (channel);
g_io_channel_win32_init (win32_channel);
if (win32_channel->debug)
g_print ("g_io_channel_win32_new_socket: channel=%p sock=%d\n",
channel, socket);
channel->funcs = &win32_channel_sock_funcs;
win32_channel->type = G_IO_WIN32_SOCKET;
win32_channel->fd = socket;
channel->is_readable = TRUE;
channel->is_writeable = TRUE;
channel->is_seekable = FALSE;
return channel;
}
GIOChannel *
g_io_channel_unix_new (gint fd)
{
gboolean is_fd, is_socket;
struct _stati64 st;
int optval, optlen;
is_fd = (_fstati64 (fd, &st) == 0);
optlen = sizeof (optval);
is_socket = (getsockopt (fd, SOL_SOCKET, SO_TYPE, (char *) &optval, &optlen) != SOCKET_ERROR);
if (is_fd && is_socket)
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);
if (is_fd)
return g_io_channel_win32_new_fd_internal (fd, &st);
if (is_socket)
return g_io_channel_win32_new_socket(fd);
g_warning ("g_io_channel_unix_new: %d is neither a file descriptor or a socket.", fd);
return NULL;
}
gint
g_io_channel_unix_get_fd (GIOChannel *channel)
{
return g_io_channel_win32_get_fd (channel);
}
void
g_io_channel_win32_set_debug (GIOChannel *channel,
gboolean flag)
{
GIOWin32Channel *win32_channel = (GIOWin32Channel *)channel;
win32_channel->debug = flag;
}
gint
g_io_channel_win32_poll (GPollFD *fds,
gint n_fds,
gint timeout)
{
g_return_val_if_fail (n_fds >= 0, 0);
return g_poll (fds, n_fds, timeout);
}
void
g_io_channel_win32_make_pollfd (GIOChannel *channel,
GIOCondition condition,
GPollFD *fd)
{
GIOWin32Channel *win32_channel = (GIOWin32Channel *)channel;
switch (win32_channel->type)
{
case G_IO_WIN32_FILE_DESC:
if (win32_channel->data_avail_event == NULL)
create_events (win32_channel);
fd->fd = (gintptr) win32_channel->data_avail_event;
if (win32_channel->thread_id == 0)
{
/* Is it meaningful for a file descriptor to be polled for
* both IN and OUT? For what kind of file descriptor would
* that be? Doesn't seem to make sense, in practise the file
* descriptors handled here are always read or write ends of
* pipes surely, and thus unidirectional.
*/
if (condition & G_IO_IN)
create_thread (win32_channel, condition, read_thread);
else if (condition & G_IO_OUT)
create_thread (win32_channel, condition, write_thread);
}
break;
case G_IO_WIN32_CONSOLE:
fd->fd = _get_osfhandle (win32_channel->fd);
break;
case G_IO_WIN32_SOCKET:
fd->fd = (gintptr) WSACreateEvent ();
break;
case G_IO_WIN32_WINDOWS_MESSAGES:
fd->fd = G_WIN32_MSG_HANDLE;
break;
default:
g_assert_not_reached ();
g_abort ();
}
fd->events = condition;
}
#ifndef _WIN64
/* Binary compatibility */
GIOChannel *
g_io_channel_win32_new_stream_socket (int socket)
{
return g_io_channel_win32_new_socket (socket);
}
#endif
#ifdef G_OS_WIN32
/* Binary compatibility versions. Not for newly compiled code. */
_GLIB_EXTERN GIOChannel *g_io_channel_new_file_utf8 (const gchar *filename,
const gchar *mode,
GError **error);
GIOChannel *
g_io_channel_new_file_utf8 (const gchar *filename,
const gchar *mode,
GError **error)
{
return g_io_channel_new_file (filename, mode, error);
}
#endif
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