dlls/user/user_main.c

   1 /*
   2  * USER initialization code
   3  *
   4  * Copyright 2000 Alexandre Julliard
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #include <stdarg.h>
  22 #include <stdio.h>
  23 #include <string.h>
  24 #include "windef.h"
  25 #include "winbase.h"
  26 #include "wingdi.h"
  27 #include "winuser.h"
  28 #include "winreg.h"
  29 #include "tlhelp32.h"
  30
  31 #include "controls.h"
  32 #include "user_private.h"
  33 #include "win.h"
  34 #include "wine/debug.h"
  35
  36 WINE_DEFAULT_DEBUG_CHANNEL(graphics);
  37
  38 WORD USER_HeapSel = 0;  /* USER heap selector */
  39 HMODULE user32_module = 0;
  40
  41 static SYSLEVEL USER_SysLevel;
  42 static CRITICAL_SECTION_DEBUG critsect_debug =
  43 {
  44     0, 0, &USER_SysLevel.crst,
  45     { &critsect_debug.ProcessLocksList, &critsect_debug.ProcessLocksList },
  46       0, 0, { 0, (DWORD)(__FILE__ ": USER_SysLevel") }
  47 };
  48 static SYSLEVEL USER_SysLevel = { { &critsect_debug, -1, 0, 0, 0, 0 }, 2 };
  49
  50 static HPALETTE (WINAPI *pfnGDISelectPalette)( HDC hdc, HPALETTE hpal, WORD bkgnd );
  51 static UINT (WINAPI *pfnGDIRealizePalette)( HDC hdc );
  52 static HPALETTE hPrimaryPalette;
  53
  54 static DWORD exiting_thread_id;
  55
  56 extern void WDML_NotifyThreadDetach(void);
  57
  58
  59 /***********************************************************************
  60  *           USER_Lock
  61  */
  62 void USER_Lock(void)
  63 {
  64     _EnterSysLevel( &USER_SysLevel );
  65 }
  66
  67
  68 /***********************************************************************
  69  *           USER_Unlock
  70  */
  71 void USER_Unlock(void)
  72 {
  73     _LeaveSysLevel( &USER_SysLevel );
  74 }
  75
  76
  77 /***********************************************************************
  78  *           USER_CheckNotLock
  79  *
  80  * Make sure that we don't hold the user lock.
  81  */
  82 void USER_CheckNotLock(void)
  83 {
  84     _CheckNotSysLevel( &USER_SysLevel );
  85 }
  86
  87
  88 /***********************************************************************
  89  *              UserSelectPalette (Not a Windows API)
  90  */
  91 static HPALETTE WINAPI UserSelectPalette( HDC hDC, HPALETTE hPal, BOOL bForceBackground )
  92 {
  93     WORD wBkgPalette = 1;
  94
  95     if (!bForceBackground && (hPal != GetStockObject(DEFAULT_PALETTE)))
  96     {
  97         HWND hwnd = WindowFromDC( hDC );
  98         if (hwnd)
  99         {
 100             HWND hForeground = GetForegroundWindow();
 101             /* set primary palette if it's related to current active */
 102             if (hForeground == hwnd || IsChild(hForeground,hwnd))
 103             {
 104                 wBkgPalette = 0;
 105                 hPrimaryPalette = hPal;
 106             }
 107         }
 108     }
 109     return pfnGDISelectPalette( hDC, hPal, wBkgPalette);
 110 }
 111
 112
 113 /***********************************************************************
 114  *              UserRealizePalette (USER32.@)
 115  */
 116 UINT WINAPI UserRealizePalette( HDC hDC )
 117 {
 118     UINT realized = pfnGDIRealizePalette( hDC );
 119
 120     /* do not send anything if no colors were changed */
 121     if (realized && GetCurrentObject( hDC, OBJ_PAL ) == hPrimaryPalette)
 122     {
 123         /* send palette change notification */
 124         HWND hWnd = WindowFromDC( hDC );
 125         if (hWnd) SendMessageTimeoutW( HWND_BROADCAST, WM_PALETTECHANGED, (WPARAM)hWnd, 0,
 126                                        SMTO_ABORTIFHUNG, 2000, NULL );
 127     }
 128     return realized;
 129 }
 130
 131
 132 /***********************************************************************
 133  *           palette_init
 134  *
 135  * Patch the function pointers in GDI for SelectPalette and RealizePalette
 136  */
 137 static void palette_init(void)
 138 {
 139     void **ptr;
 140     HMODULE module = GetModuleHandleA( "gdi32" );
 141     if (!module)
 142     {
 143         ERR( "cannot get GDI32 handle\n" );
 144         return;
 145     }
 146     if ((ptr = (void**)GetProcAddress( module, "pfnSelectPalette" )))
 147         pfnGDISelectPalette = InterlockedExchangePointer( ptr, UserSelectPalette );
 148     else ERR( "cannot find pfnSelectPalette in GDI32\n" );
 149     if ((ptr = (void**)GetProcAddress( module, "pfnRealizePalette" )))
 150         pfnGDIRealizePalette = InterlockedExchangePointer( ptr, UserRealizePalette );
 151     else ERR( "cannot find pfnRealizePalette in GDI32\n" );
 152 }
 153
 154
 155 /***********************************************************************
 156  *           USER initialisation routine
 157  */
 158 static BOOL process_attach(void)
 159 {
 160     HINSTANCE16 instance;
 161
 162     /* Create USER heap */
 163     if ((instance = LoadLibrary16( "USER.EXE" )) >= 32) USER_HeapSel = instance | 7;
 164     else
 165     {
 166         USER_HeapSel = GlobalAlloc16( GMEM_FIXED, 65536 );
 167         LocalInit16( USER_HeapSel, 32, 65534 );
 168     }
 169
 170     /* some Win9x dlls expect keyboard to be loaded */
 171     if (GetVersion() & 0x80000000) LoadLibrary16( "keyboard.drv" );
 172
 173     /* Initialize system colors and metrics */
 174     SYSPARAMS_Init();
 175
 176     /* Setup palette function pointers */
 177     palette_init();
 178
 179     /* Initialize built-in window classes */
 180     CLASS_RegisterBuiltinClasses();
 181
 182     /* Initialize message spying */
 183     if (!SPY_Init()) return FALSE;
 184
 185     return TRUE;
 186 }
 187
 188
 189 /**********************************************************************
 190  *           USER_IsExitingThread
 191  */
 192 BOOL USER_IsExitingThread( DWORD tid )
 193 {
 194     return (tid == exiting_thread_id);
 195 }
 196
 197
 198 /**********************************************************************
 199  *           thread_detach
 200  */
 201 static void thread_detach(void)
 202 {
 203     exiting_thread_id = GetCurrentThreadId();
 204
 205     WDML_NotifyThreadDetach();
 206
 207     WIN_DestroyThreadWindows( GetDesktopWindow() );
 208     CloseHandle( get_user_thread_info()->server_queue );
 209
 210     exiting_thread_id = 0;
 211 }
 212
 213
 214 /***********************************************************************
 215  *           UserClientDllInitialize  (USER32.@)
 216  *
 217  * USER dll initialisation routine (exported as UserClientDllInitialize for compatibility).
 218  */
 219 BOOL WINAPI DllMain( HINSTANCE inst, DWORD reason, LPVOID reserved )
 220 {
 221     BOOL ret = TRUE;
 222     switch(reason)
 223     {
 224     case DLL_PROCESS_ATTACH:
 225         user32_module = inst;
 226         ret = process_attach();
 227         break;
 228     case DLL_THREAD_DETACH:
 229         thread_detach();
 230         break;
 231     case DLL_PROCESS_DETACH:
 232         USER_unload_driver();
 233         break;
 234     }
 235     return ret;
 236 }
 237
 238
 239 /***********************************************************************
 240  *           USER_GetProcessHandleList(Internal)
 241  */
 242 static HANDLE *USER_GetProcessHandleList(void)
 243 {
 244     DWORD count, i, n;
 245     HANDLE *list;
 246     PROCESSENTRY32 pe;
 247     HANDLE hSnapshot;
 248     BOOL r;
 249
 250     hSnapshot = CreateToolhelp32Snapshot( TH32CS_SNAPPROCESS, 0 );
 251     if (!hSnapshot)
 252     {
 253         ERR("cannot create snapshot\n");
 254         return FALSE;
 255     }
 256
 257     /* count the number of processes plus one */
 258     for (count=0; ;count++)
 259     {
 260         pe.dwSize = sizeof pe;
 261         if (count)
 262             r = Process32Next( hSnapshot, &pe );
 263         else
 264             r = Process32First( hSnapshot, &pe );
 265         if (!r)
 266             break;
 267     }
 268
 269     /* allocate memory make a list of the process handles */
 270     list = HeapAlloc( GetProcessHeap(), 0, (count+1)*sizeof(HANDLE) );
 271     n=0;
 272     for (i=0; i<count; i++)
 273     {
 274         pe.dwSize = sizeof pe;
 275         if (i)
 276             r = Process32Next( hSnapshot, &pe );
 277         else
 278             r = Process32First( hSnapshot, &pe );
 279         if (!r)
 280             break;
 281
 282         /* don't kill ourselves */
 283         if (GetCurrentProcessId() == pe.th32ProcessID )
 284             continue;
 285
 286         /* open the process so we don't can track it */
 287         list[n] = OpenProcess( PROCESS_QUERY_INFORMATION|
 288                                   PROCESS_TERMINATE,
 289                                   FALSE, pe.th32ProcessID );
 290
 291         /* check it didn't terminate already */
 292         if( list[n] )
 293             n++;
 294     }
 295     list[n]=0;
 296     CloseHandle( hSnapshot );
 297
 298     if (!r)
 299         ERR("Error enumerating processes\n");
 300
 301     TRACE("return %lu processes\n", n);
 302
 303     return list;
 304 }
 305
 306
 307 /***********************************************************************
 308  *              USER_KillProcesses (Internal)
 309  */
 310 static DWORD USER_KillProcesses(void)
 311 {
 312     DWORD n, r, i;
 313     HANDLE *handles;
 314     const DWORD dwShutdownTimeout = 10000;
 315
 316     TRACE("terminating other processes\n");
 317
 318     /* kill it and add it to our list of object to wait on */
 319     handles = USER_GetProcessHandleList();
 320     for (n=0; handles && handles[n]; n++)
 321         TerminateProcess( handles[n], 0 );
 322
 323     /* wait for processes to exit */
 324     for (i=0; i<n; i+=MAXIMUM_WAIT_OBJECTS)
 325     {
 326         int n_objs = ((n-i)>MAXIMUM_WAIT_OBJECTS) ? MAXIMUM_WAIT_OBJECTS : (n-i);
 327         r = WaitForMultipleObjects( n_objs, &handles[i], TRUE, dwShutdownTimeout );
 328         if (r==WAIT_TIMEOUT)
 329             ERR("wait failed!\n");
 330     }
 331
 332     /* close the handles */
 333     for (i=0; i<n; i++)
 334         CloseHandle( handles[i] );
 335
 336     HeapFree( GetProcessHeap(), 0, handles );
 337
 338     return n;
 339 }
 340
 341
 342 /***********************************************************************
 343  *              USER_DoShutdown (Internal)
 344  */
 345 static void USER_DoShutdown(void)
 346 {
 347     DWORD i, n;
 348     const DWORD nRetries = 10;
 349
 350     for (i=0; i<nRetries; i++)
 351     {
 352         n = USER_KillProcesses();
 353         TRACE("Killed %ld processes, attempt %ld\n", n, i);
 354         if(!n)
 355             break;
 356     }
 357 }
 358
 359
 360 /***********************************************************************
 361  *              ExitWindowsEx (USER32.@)
 362  */
 363 BOOL WINAPI ExitWindowsEx( UINT flags, DWORD reserved )
 364 {
 365     int i;
 366     BOOL result = FALSE;
 367     HWND *list, *phwnd;
 368
 369     /* We have to build a list of all windows first, as in EnumWindows */
 370     TRACE("(%x,%lx)\n", flags, reserved);
 371
 372     list = WIN_ListChildren( GetDesktopWindow() );
 373     if (list)
 374     {
 375         /* Send a WM_QUERYENDSESSION message to every window */
 376
 377         for (i = 0; list[i]; i++)
 378         {
 379             /* Make sure that the window still exists */
 380             if (!IsWindow( list[i] )) continue;
 381             if (!SendMessageW( list[i], WM_QUERYENDSESSION, 0, 0 )) break;
 382         }
 383         result = !list[i];
 384
 385         /* Now notify all windows that got a WM_QUERYENDSESSION of the result */
 386
 387         for (phwnd = list; i > 0; i--, phwnd++)
 388         {
 389             if (!IsWindow( *phwnd )) continue;
 390             SendMessageW( *phwnd, WM_ENDSESSION, result, 0 );
 391         }
 392         HeapFree( GetProcessHeap(), 0, list );
 393
 394         if ( !(result || (flags & EWX_FORCE) ))
 395             return FALSE;
 396     }
 397
 398     /* USER_DoShutdown will kill all processes except the current process */
 399     USER_DoShutdown();
 400
 401     if (flags & EWX_REBOOT)
 402     {
 403         WCHAR winebootW[] = { 'w','i','n','e','b','o','o','t',0 };
 404         PROCESS_INFORMATION pi;
 405         STARTUPINFOW si;
 406
 407         memset( &si, 0, sizeof si );
 408         si.cb = sizeof si;
 409         if (CreateProcessW( NULL, winebootW, NULL, NULL, FALSE, 0, NULL, NULL, &si, &pi ))
 410         {
 411             CloseHandle( pi.hProcess );
 412             CloseHandle( pi.hThread );
 413         }
 414         else
 415             MESSAGE("wine: Failed to start wineboot\n");
 416     }
 417
 418     if (result) ExitProcess(0);
 419     return TRUE;
 420 }