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giowin32.c
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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 Andrew Lanoix
*
* 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 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, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/*
* 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/.
*/
/* Define this to get (very) verbose logging of all channels */
/* #define G_IO_WIN32_DEBUG */
#include "glib.h"
#include <stdlib.h>
#include <windows.h>
#include <winsock.h> /* Not everybody has winsock2 */
#include <fcntl.h>
#include <io.h>
#include <process.h>
#include <errno.h>
#include <sys/stat.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(). Read with read().
* Have to create separate thread to read.
*/
G_IO_WIN32_SOCKET /* Sockets. A separate thread is blocked
* in select() most of the time.
*/
} 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;
CRITICAL_SECTION mutex;
/* This is used by G_IO_WIN32_WINDOWS_MESSAGES channels */
HWND hwnd; /* handle of window, or NULL */
/* Following fields are used by both fd and socket channels. */
gboolean running; /* Is reader thread running. FALSE if
* EOF has been reached.
*/
gboolean needs_close; /* If the channel has been closed while
* the reader thread was still running.
*/
guint thread_id; /* If non-NULL has a reader thread, or has
* had.*/
HANDLE thread_handle;
HANDLE data_avail_event;
gushort revents;
/* Following fields used by fd channels for input */
/* Data is kept in a circular buffer. To be able to distinguish between
* empty and full buffer, 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;
/* Following fields used by socket channels */
GSList *watches;
HANDLE data_avail_noticed_event;
};
#define LOCK(mutex) EnterCriticalSection (&mutex)
#define UNLOCK(mutex) LeaveCriticalSection (&mutex)
struct _GIOWin32Watch {
GSource source;
GPollFD pollfd;
GIOChannel *channel;
GIOCondition condition;
GIOFunc callback;
};
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_WRITEABLE)
g_print ("%sWRITEABLE", bar), bar = "|";
if (flags & G_IO_FLAG_IS_WRITEABLE)
g_print ("%sWRITEABLE", bar), bar = "|";
if (flags & G_IO_FLAG_IS_SEEKABLE)
g_print ("%sSEEKABLE", bar), bar = "|";
}
static gboolean
g_io_win32_get_debug_flag (void)
{
#ifdef G_IO_WIN32_DEBUG
return TRUE;
#else
if (getenv ("G_IO_WIN32_DEBUG") != NULL)
return TRUE;
else
return FALSE;
#endif
}
static void
g_io_channel_win32_init (GIOWin32Channel *channel)
{
channel->debug = g_io_win32_get_debug_flag ();
channel->buffer = NULL;
channel->running = FALSE;
channel->needs_close = FALSE;
channel->thread_id = 0;
channel->data_avail_event = NULL;
channel->revents = 0;
channel->space_avail_event = NULL;
channel->data_avail_noticed_event = NULL;
channel->watches = NULL;
InitializeCriticalSection (&channel->mutex);
}
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))
|| !(channel->data_avail_noticed_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;
guint nbytes;
g_io_channel_ref ((GIOChannel *)channel);
if (channel->debug)
g_print ("read_thread %#x: start fd:%d, data_avail:%#x, space_avail:%#x\n",
channel->thread_id,
channel->fd,
(guint) channel->data_avail_event,
(guint) channel->space_avail_event);
channel->buffer = g_malloc (BUFFER_SIZE);
channel->rdp = channel->wrp = 0;
channel->running = TRUE;
SetEvent (channel->space_avail_event);
while (channel->running)
{
LOCK (channel->mutex);
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);
UNLOCK (channel->mutex);
WaitForSingleObject (channel->space_avail_event, INFINITE);
LOCK (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);
UNLOCK (channel->mutex);
nbytes = read (channel->fd, buffer, nbytes);
LOCK (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);
UNLOCK (channel->mutex);
}
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);
UNLOCK (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.
*/
CloseHandle (channel->thread_handle);
return 0;
}
static void
create_thread (GIOWin32Channel *channel,
GIOCondition condition,
unsigned (__stdcall *thread) (void *parameter))
{
channel->thread_handle =
(HANDLE) _beginthreadex (NULL, 0, thread, channel, 0,
&channel->thread_id);
if (channel->thread_handle == 0)
g_warning (G_STRLOC ": Error creating reader thread: %s",
strerror (errno));
WaitForSingleObject (channel->space_avail_event, INFINITE);
}
static GIOStatus
buffer_read (GIOWin32Channel *channel,
guchar *dest,
gsize count,
gsize *bytes_read,
GError **err)
{
guint nbytes;
guint left = count;
LOCK (channel->mutex);
if (channel->debug)
g_print ("reading from thread %#x %d bytes, rdp=%d, wrp=%d\n",
channel->thread_id, count, channel->rdp, channel->wrp);
if (channel->wrp == channel->rdp)
{
UNLOCK (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);
LOCK (channel->mutex);
if (channel->wrp == channel->rdp && !channel->running)
{
UNLOCK (channel->mutex);
*bytes_read = 0;
return G_IO_STATUS_NORMAL; /* as before, normal case ? */
}
}
if (channel->rdp < channel->wrp)
nbytes = channel->wrp - channel->rdp;
else
nbytes = BUFFER_SIZE - channel->rdp;
UNLOCK (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;
LOCK (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);
};
UNLOCK (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 unsigned __stdcall
select_thread (void *parameter)
{
GIOWin32Channel *channel = parameter;
fd_set read_fds, write_fds, except_fds;
GSList *tmp;
int n;
g_io_channel_ref ((GIOChannel *)channel);
if (channel->debug)
g_print ("select_thread %#x: start fd:%d,\n\tdata_avail:%#x, data_avail_noticed:%#x\n",
channel->thread_id,
channel->fd,
(guint) channel->data_avail_event,
(guint) channel->data_avail_noticed_event);
channel->rdp = channel->wrp = 0;
channel->running = TRUE;
SetEvent (channel->space_avail_event);
while (channel->running)
{
FD_ZERO (&read_fds);
FD_ZERO (&write_fds);
FD_ZERO (&except_fds);
tmp = channel->watches;
while (tmp)
{
GIOWin32Watch *watch = (GIOWin32Watch *)tmp->data;
if (watch->condition & (G_IO_IN | G_IO_HUP))
FD_SET (channel->fd, &read_fds);
if (watch->condition & G_IO_OUT)
FD_SET (channel->fd, &write_fds);
if (watch->condition & G_IO_ERR)
FD_SET (channel->fd, &except_fds);
tmp = tmp->next;
}
if (channel->debug)
g_print ("select_thread %#x: calling select() for%s%s%s\n",
channel->thread_id,
(FD_ISSET (channel->fd, &read_fds) ? " IN" : ""),
(FD_ISSET (channel->fd, &write_fds) ? " OUT" : ""),
(FD_ISSET (channel->fd, &except_fds) ? " ERR" : ""));
n = select (1, &read_fds, &write_fds, &except_fds, NULL);
if (n == SOCKET_ERROR)
{
if (channel->debug)
g_print ("select_thread %#x: select returned SOCKET_ERROR\n",
channel->thread_id);
break;
}
if (channel->debug)
g_print ("select_thread %#x: got%s%s%s\n",
channel->thread_id,
(FD_ISSET (channel->fd, &read_fds) ? " IN" : ""),
(FD_ISSET (channel->fd, &write_fds) ? " OUT" : ""),
(FD_ISSET (channel->fd, &except_fds) ? " ERR" : ""));
if (FD_ISSET (channel->fd, &read_fds))
channel->revents |= G_IO_IN;
if (FD_ISSET (channel->fd, &write_fds))
channel->revents |= G_IO_OUT;
if (FD_ISSET (channel->fd, &except_fds))
channel->revents |= G_IO_ERR;
if (channel->debug)
g_print ("select_thread %#x: resetting data_avail_noticed,\n"
"\tsetting data_avail\n",
channel->thread_id);
ResetEvent (channel->data_avail_noticed_event);
SetEvent (channel->data_avail_event);
LOCK (channel->mutex);
if (channel->needs_close)
{
UNLOCK (channel->mutex);
break;
}
UNLOCK (channel->mutex);
if (channel->debug)
g_print ("select_thread %#x: waiting for data_avail_noticed\n",
channel->thread_id);
WaitForSingleObject (channel->data_avail_noticed_event, INFINITE);
if (channel->debug)
g_print ("select_thread %#x: got data_avail_noticed\n",
channel->thread_id);
}
channel->running = FALSE;
LOCK (channel->mutex);
if (channel->fd != -1)
{
/* DO NOT close the fd here */
channel->fd = -1;
}
if (channel->debug)
g_print ("select_thread %#x: got error, setting data_avail\n",
channel->thread_id);
SetEvent (channel->data_avail_event);
UNLOCK (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.
*/
CloseHandle (channel->thread_handle);
return 0;
}
static gboolean
g_io_win32_prepare (GSource *source,
gint *timeout)
{
GIOWin32Watch *watch = (GIOWin32Watch *)source;
GIOWin32Channel *channel = (GIOWin32Channel *)watch->channel;
*timeout = -1;
if (channel->type == G_IO_WIN32_FILE_DESC)
{
LOCK (channel->mutex);
if (channel->running && channel->wrp == channel->rdp)
channel->revents = 0;
UNLOCK (channel->mutex);
}
else if (channel->type == G_IO_WIN32_SOCKET)
{
channel->revents = 0;
if (channel->debug)
g_print ("g_io_win32_prepare: thread %#x, setting data_avail_noticed\n",
channel->thread_id);
SetEvent (channel->data_avail_noticed_event);
if (channel->debug)
g_print ("g_io_win32_prepare: thread %#x, there.\n",
channel->thread_id);
}
return FALSE;
/* XXX: why should we want to do this ? */
watch->condition = g_io_channel_get_buffer_condition (watch->channel);
return (watch->pollfd.revents & (G_IO_IN | G_IO_OUT)) == 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);
if (channel->debug)
g_print ("g_io_win32_check: for thread %#x:\n"
"\twatch->pollfd.events:%#x, watch->pollfd.revents:%#x, channel->revents:%#x\n",
channel->thread_id,
watch->pollfd.events, watch->pollfd.revents, channel->revents);
if (channel->type != G_IO_WIN32_WINDOWS_MESSAGES)
{
watch->pollfd.revents = (watch->pollfd.events & channel->revents);
}
else
{
return (PeekMessage (&msg, channel->hwnd, 0, 0, PM_NOREMOVE));
}
if (channel->type == G_IO_WIN32_SOCKET)
{
if (channel->debug)
g_print ("g_io_win32_check: thread %#x, resetting data_avail\n",
channel->thread_id);
ResetEvent (channel->data_avail_event);
if (channel->debug)
g_print ("g_io_win32_check: thread %#x, there.\n",
channel->thread_id);
}
return (watch->pollfd.revents & watch->condition);
}
static gboolean
g_io_win32_dispatch (GSource *source,
GSourceFunc callback,
gpointer user_data)
{
GIOFunc func = (GIOFunc)callback;
GIOWin32Watch *watch = (GIOWin32Watch *)source;
if (!func)
{
g_warning (G_STRLOC ": GIOWin32Watch dispatched without callback\n"
"You must call g_source_connect().");
return FALSE;
}
return (*func) (watch->channel,
watch->pollfd.revents & 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: channel with thread %#x\n",
channel->thread_id);
channel->watches = g_slist_remove (channel->watches, watch);
SetEvent (channel->data_avail_noticed_event);
g_io_channel_unref (watch->channel);
}
#if defined(G_PLATFORM_WIN32) && defined(__GNUC__)
__declspec(dllexport)
#endif
GSourceFuncs g_io_watch_funcs = {
g_io_win32_prepare,
g_io_win32_check,
g_io_win32_dispatch,
g_io_win32_finalize
};
static GSource *
g_io_win32_create_watch (GIOChannel *channel,
GIOCondition condition,
unsigned (__stdcall *thread) (void *parameter))
{
GIOWin32Channel *win32_channel = (GIOWin32Channel *)channel;
GIOWin32Watch *watch;
GSource *source;
source = g_source_new (&g_io_watch_funcs, sizeof (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 = (gint) win32_channel->data_avail_event;
watch->pollfd.events = condition;
if (win32_channel->debug)
g_print ("g_io_win32_create_watch: fd:%d condition:%#x handle:%#x\n",
win32_channel->fd, condition, watch->pollfd.fd);
win32_channel->watches = g_slist_append (win32_channel->watches, watch);
if (win32_channel->thread_id == 0)
create_thread (win32_channel, condition, thread);
g_source_add_poll (source, &watch->pollfd);
return source;
}
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 */
if (count < sizeof (MSG))
{
g_set_error(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: for %#x\n",
(guint) 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;
if (count != sizeof (MSG))
{
g_set_error(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(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_no_seek (GIOChannel *channel,
glong offset,
GSeekType type,
GError **err)
{
g_assert_not_reached ();
return G_IO_STATUS_ERROR;
}
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 ("thread %#x: freeing channel, fd: %d\n",
win32_channel->thread_id,
win32_channel->fd);
if (win32_channel->data_avail_event)
CloseHandle (win32_channel->data_avail_event);
if (win32_channel->space_avail_event)
CloseHandle (win32_channel->space_avail_event);
if (win32_channel->data_avail_noticed_event)
CloseHandle (win32_channel->data_avail_noticed_event);
DeleteCriticalSection (&win32_channel->mutex);
g_free (win32_channel->buffer);
g_slist_free (win32_channel->watches);
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));
watch = (GIOWin32Watch *)source;
watch->channel = channel;
g_io_channel_ref (channel);
watch->condition = condition;
watch->pollfd.fd = G_WIN32_MSG_HANDLE;
watch->pollfd.events = condition;
g_source_add_poll (source, &watch->pollfd);
return source;
}
static GIOStatus
g_io_win32_fd_read (GIOChannel *channel,
gchar *buf,
gsize count,
gsize *bytes_read,
GError **err)
{
GIOWin32Channel *win32_channel = (GIOWin32Channel *)channel;
gint result;
if (win32_channel->debug)
g_print ("g_io_win32_fd_read: fd:%d count:%d\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);
if (win32_channel->debug)
g_print ("g_io_win32_fd_read: read() = %d\n", result);
if (result < 0)
{
*bytes_read = 0;
switch(errno)
{
#ifdef EAGAIN
case EAGAIN:
return G_IO_STATUS_AGAIN;
#endif
default:
g_set_error (err, G_IO_CHANNEL_ERROR,
g_io_channel_error_from_errno (errno),
strerror (errno));
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_write (GIOChannel *channel,
const gchar *buf,
gsize count,
gsize *bytes_written,
GError **err)
{
GIOWin32Channel *win32_channel = (GIOWin32Channel *)channel;
gint result;
result = write (win32_channel->fd, buf, count);
if (win32_channel->debug)
g_print ("g_io_win32_fd_write: fd:%d count:%d = %d\n",
win32_channel->fd, count, result);
if (result < 0)
{
*bytes_written = 0;
switch(errno)
{
#ifdef EAGAIN
case EAGAIN:
return G_IO_STATUS_AGAIN;
#endif
default:
g_set_error (err, G_IO_CHANNEL_ERROR,
g_io_channel_error_from_errno (errno),
strerror (errno));
return G_IO_STATUS_ERROR;
}
}
*bytes_written = result;
return G_IO_STATUS_NORMAL;
}
static GIOStatus
g_io_win32_fd_seek (GIOChannel *channel,
glong offset,
GSeekType type,
GError **err)
{
GIOWin32Channel *win32_channel = (GIOWin32Channel *)channel;
int whence;
off_t 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();
}
result = lseek (win32_channel->fd, offset, whence);
if (result < 0)
{
g_set_error (err, G_IO_CHANNEL_ERROR,
g_io_channel_error_from_errno (errno),
strerror (errno));
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 ("thread %#x: closing fd %d\n",
win32_channel->thread_id,
win32_channel->fd);
LOCK (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;
SetEvent (win32_channel->data_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;
}
UNLOCK (win32_channel->mutex);
/* FIXME error detection? */
return G_IO_STATUS_NORMAL;
}
static GSource *
g_io_win32_fd_create_watch (GIOChannel *channel,
GIOCondition condition)
{
return g_io_win32_create_watch (channel, condition, read_thread);
}
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;
if (win32_channel->debug)
g_print ("g_io_win32_sock_read: sockfd:%d count:%d\n",
win32_channel->fd, count);
#ifdef WE_NEED_TO_HANDLE_WSAEINTR
repeat:
#endif
result = recv (win32_channel->fd, buf, count, 0);