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Perberos
2011-11-07 16:46:58 -03:00
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gedit/smclient/eggsmclient-win32.c Executable file
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/*
* Copyright (C) 2007 Novell, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library 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.
*/
/* EggSMClientWin32
*
* For details on the Windows XP logout process, see:
* http://msdn.microsoft.com/en-us/library/aa376876.aspx.
*
* Vista adds some new APIs which EggSMClient does not make use of; see
* http://msdn.microsoft.com/en-us/library/ms700677(VS.85).aspx
*
* When shutting down, Windows sends every top-level window a
* WM_QUERYENDSESSION event, which the application must respond to
* synchronously, saying whether or not it will quit. To avoid main
* loop re-entrancy problems (and to avoid having to muck about too
* much with the guts of the gdk-win32 main loop), we watch for this
* event in a separate thread, which then signals the main thread and
* waits for the main thread to handle the event. Since we don't want
* to require g_thread_init() to be called, we do this all using
* Windows-specific thread methods.
*
* After the application handles the WM_QUERYENDSESSION event,
* Windows then sends it a WM_ENDSESSION event with a TRUE or FALSE
* parameter indicating whether the session is or is not actually
* going to end now. We handle this from the other thread as well.
*
* As mentioned above, Vista introduces several additional new APIs
* that don't fit into the (current) EggSMClient API. Windows also has
* an entirely separate shutdown-notification scheme for non-GUI apps,
* which we also don't handle here.
*/
#include "config.h"
#include "eggsmclient-private.h"
#include <gdk/gdk.h>
#define WIN32_LEAN_AND_MEAN
#define UNICODE
#include <windows.h>
#include <process.h>
#define EGG_TYPE_SM_CLIENT_WIN32 (egg_sm_client_win32_get_type ())
#define EGG_SM_CLIENT_WIN32(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), EGG_TYPE_SM_CLIENT_WIN32, EggSMClientWin32))
#define EGG_SM_CLIENT_WIN32_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), EGG_TYPE_SM_CLIENT_WIN32, EggSMClientWin32Class))
#define EGG_IS_SM_CLIENT_WIN32(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), EGG_TYPE_SM_CLIENT_WIN32))
#define EGG_IS_SM_CLIENT_WIN32_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), EGG_TYPE_SM_CLIENT_WIN32))
#define EGG_SM_CLIENT_WIN32_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), EGG_TYPE_SM_CLIENT_WIN32, EggSMClientWin32Class))
typedef struct _EggSMClientWin32 EggSMClientWin32;
typedef struct _EggSMClientWin32Class EggSMClientWin32Class;
struct _EggSMClientWin32 {
EggSMClient parent;
HANDLE message_event, response_event;
volatile GSourceFunc event;
volatile gboolean will_quit;
};
struct _EggSMClientWin32Class
{
EggSMClientClass parent_class;
};
static void sm_client_win32_startup (EggSMClient *client,
const char *client_id);
static void sm_client_win32_will_quit (EggSMClient *client,
gboolean will_quit);
static gboolean sm_client_win32_end_session (EggSMClient *client,
EggSMClientEndStyle style,
gboolean request_confirmation);
static GSource *g_win32_handle_source_add (HANDLE handle, GSourceFunc callback,
gpointer user_data);
static gboolean got_message (gpointer user_data);
static void sm_client_thread (gpointer data);
G_DEFINE_TYPE (EggSMClientWin32, egg_sm_client_win32, EGG_TYPE_SM_CLIENT)
static void
egg_sm_client_win32_init (EggSMClientWin32 *win32)
{
;
}
static void
egg_sm_client_win32_class_init (EggSMClientWin32Class *klass)
{
EggSMClientClass *sm_client_class = EGG_SM_CLIENT_CLASS (klass);
sm_client_class->startup = sm_client_win32_startup;
sm_client_class->will_quit = sm_client_win32_will_quit;
sm_client_class->end_session = sm_client_win32_end_session;
}
EggSMClient *
egg_sm_client_win32_new (void)
{
return g_object_new (EGG_TYPE_SM_CLIENT_WIN32, NULL);
}
static void
sm_client_win32_startup (EggSMClient *client,
const char *client_id)
{
EggSMClientWin32 *win32 = (EggSMClientWin32 *)client;
win32->message_event = CreateEvent (NULL, FALSE, FALSE, NULL);
win32->response_event = CreateEvent (NULL, FALSE, FALSE, NULL);
g_win32_handle_source_add (win32->message_event, got_message, win32);
_beginthread (sm_client_thread, 0, client);
}
static void
sm_client_win32_will_quit (EggSMClient *client,
gboolean will_quit)
{
EggSMClientWin32 *win32 = (EggSMClientWin32 *)client;
win32->will_quit = will_quit;
SetEvent (win32->response_event);
}
static gboolean
sm_client_win32_end_session (EggSMClient *client,
EggSMClientEndStyle style,
gboolean request_confirmation)
{
UINT uFlags = EWX_LOGOFF;
switch (style)
{
case EGG_SM_CLIENT_END_SESSION_DEFAULT:
case EGG_SM_CLIENT_LOGOUT:
uFlags = EWX_LOGOFF;
break;
case EGG_SM_CLIENT_REBOOT:
uFlags = EWX_REBOOT;
break;
case EGG_SM_CLIENT_SHUTDOWN:
uFlags = EWX_POWEROFF;
break;
}
/* There's no way to make ExitWindowsEx() show a logout dialog, so
* we ignore @request_confirmation.
*/
#ifdef SHTDN_REASON_FLAG_PLANNED
ExitWindowsEx (uFlags, SHTDN_REASON_FLAG_PLANNED);
#else
ExitWindowsEx (uFlags, 0);
#endif
return TRUE;
}
/* callbacks from logout-listener thread */
static gboolean
emit_quit_requested (gpointer smclient)
{
gdk_threads_enter ();
egg_sm_client_quit_requested (smclient);
gdk_threads_leave ();
return FALSE;
}
static gboolean
emit_quit (gpointer smclient)
{
EggSMClientWin32 *win32 = smclient;
gdk_threads_enter ();
egg_sm_client_quit (smclient);
gdk_threads_leave ();
SetEvent (win32->response_event);
return FALSE;
}
static gboolean
emit_quit_cancelled (gpointer smclient)
{
EggSMClientWin32 *win32 = smclient;
gdk_threads_enter ();
egg_sm_client_quit_cancelled (smclient);
gdk_threads_leave ();
SetEvent (win32->response_event);
return FALSE;
}
static gboolean
got_message (gpointer smclient)
{
EggSMClientWin32 *win32 = smclient;
win32->event (win32);
return TRUE;
}
/* Windows HANDLE GSource */
typedef struct {
GSource source;
GPollFD pollfd;
} GWin32HandleSource;
static gboolean
g_win32_handle_source_prepare (GSource *source, gint *timeout)
{
*timeout = -1;
return FALSE;
}
static gboolean
g_win32_handle_source_check (GSource *source)
{
GWin32HandleSource *hsource = (GWin32HandleSource *)source;
return hsource->pollfd.revents;
}
static gboolean
g_win32_handle_source_dispatch (GSource *source, GSourceFunc callback, gpointer user_data)
{
return (*callback) (user_data);
}
static void
g_win32_handle_source_finalize (GSource *source)
{
;
}
GSourceFuncs g_win32_handle_source_funcs = {
g_win32_handle_source_prepare,
g_win32_handle_source_check,
g_win32_handle_source_dispatch,
g_win32_handle_source_finalize
};
static GSource *
g_win32_handle_source_add (HANDLE handle, GSourceFunc callback, gpointer user_data)
{
GWin32HandleSource *hsource;
GSource *source;
source = g_source_new (&g_win32_handle_source_funcs, sizeof (GWin32HandleSource));
hsource = (GWin32HandleSource *)source;
hsource->pollfd.fd = (int)handle;
hsource->pollfd.events = G_IO_IN;
hsource->pollfd.revents = 0;
g_source_add_poll (source, &hsource->pollfd);
g_source_set_callback (source, callback, user_data, NULL);
g_source_attach (source, NULL);
return source;
}
/* logout-listener thread */
LRESULT CALLBACK
sm_client_win32_window_procedure (HWND hwnd,
UINT message,
WPARAM wParam,
LPARAM lParam)
{
EggSMClientWin32 *win32 =
(EggSMClientWin32 *)GetWindowLongPtr (hwnd, GWLP_USERDATA);
switch (message)
{
case WM_QUERYENDSESSION:
win32->event = emit_quit_requested;
SetEvent (win32->message_event);
WaitForSingleObject (win32->response_event, INFINITE);
return win32->will_quit;
case WM_ENDSESSION:
if (wParam)
{
/* The session is ending */
win32->event = emit_quit;
}
else
{
/* Nope, the session *isn't* ending */
win32->event = emit_quit_cancelled;
}
SetEvent (win32->message_event);
WaitForSingleObject (win32->response_event, INFINITE);
return 0;
default:
return DefWindowProc (hwnd, message, wParam, lParam);
}
}
static void
sm_client_thread (gpointer smclient)
{
HINSTANCE instance;
WNDCLASSEXW wcl;
ATOM klass;
HWND window;
MSG msg;
instance = GetModuleHandle (NULL);
memset (&wcl, 0, sizeof (WNDCLASSEX));
wcl.cbSize = sizeof (WNDCLASSEX);
wcl.lpfnWndProc = sm_client_win32_window_procedure;
wcl.hInstance = instance;
wcl.lpszClassName = L"EggSmClientWindow";
klass = RegisterClassEx (&wcl);
window = CreateWindowEx (0, MAKEINTRESOURCE (klass),
L"EggSmClientWindow", 0,
10, 10, 50, 50, GetDesktopWindow (),
NULL, instance, NULL);
SetWindowLongPtr (window, GWLP_USERDATA, (LONG_PTR)smclient);
/* main loop */
while (GetMessage (&msg, NULL, 0, 0))
DispatchMessage (&msg);
}