dlls/winmm/driver.c

   1 /*
   2  * WINE Drivers functions
   3  *
   4  * Copyright 1994 Martin Ayotte
   5  * Copyright 1998 Marcus Meissner
   6  * Copyright 1999 Eric Pouech
   7  *
   8  * This library is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * This library is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with this library; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  21  */
  22
  23 #include <string.h>
  24 #include <stdarg.h>
  25 #include "windef.h"
  26 #include "winbase.h"
  27 #include "wingdi.h"
  28 #include "winuser.h"
  29 #include "winnls.h"
  30 #include "winreg.h"
  31 #include "mmddk.h"
  32 #include "winemm.h"
  33 #include "wine/debug.h"
  34 #include "wine/unicode.h"
  35 #include "excpt.h"
  36 #include "wine/exception.h"
  37
  38 WINE_DEFAULT_DEBUG_CHANNEL(driver);
  39
  40 static LPWINE_DRIVER   lpDrvItemList  /* = NULL */;
  41 static const WCHAR HKLM_BASE[] = {'S','o','f','t','w','a','r','e','\\','M','i','c','r','o','s','o','f','t','\\',
  42                                   'W','i','n','d','o','w','s',' ','N','T','\\','C','u','r','r','e','n','t','V','e','r','s','i','o','n',0};
  43
  44 WINE_MMTHREAD*  (*pFnGetMMThread16)(UINT16 h) /* = NULL */;
  45 LPWINE_DRIVER   (*pFnOpenDriver16)(LPCWSTR,LPCWSTR,LPARAM) /* = NULL */;
  46 LRESULT         (*pFnCloseDriver16)(UINT16,LPARAM,LPARAM) /* = NULL */;
  47 LRESULT         (*pFnSendMessage16)(UINT16,UINT,LPARAM,LPARAM) /* = NULL */;
  48
  49 /**************************************************************************
  50  *                      DRIVER_GetNumberOfModuleRefs            [internal]
  51  *
  52  * Returns the number of open drivers which share the same module.
  53  */
  54 static  unsigned DRIVER_GetNumberOfModuleRefs(HMODULE hModule, WINE_DRIVER** found)
  55 {
  56     LPWINE_DRIVER       lpDrv;
  57     unsigned            count = 0;
  58
  59     if (found) *found = NULL;
  60     for (lpDrv = lpDrvItemList; lpDrv; lpDrv = lpDrv->lpNextItem)
  61     {
  62         if (!(lpDrv->dwFlags & WINE_GDF_16BIT) && lpDrv->d.d32.hModule == hModule)
  63         {
  64             if (found && !*found) *found = lpDrv;
  65             count++;
  66         }
  67     }
  68     return count;
  69 }
  70
  71 /**************************************************************************
  72  *                              DRIVER_FindFromHDrvr            [internal]
  73  *
  74  * From a hDrvr being 32 bits, returns the WINE internal structure.
  75  */
  76 LPWINE_DRIVER   DRIVER_FindFromHDrvr(HDRVR hDrvr)
  77 {
  78     LPWINE_DRIVER       d = (LPWINE_DRIVER)hDrvr;
  79
  80     __TRY
  81     {
  82         if (d && d->dwMagic != WINE_DI_MAGIC) d = NULL;
  83     }
  84     __EXCEPT(NULL)
  85     {
  86         return NULL;
  87     }
  88     __ENDTRY;
  89
  90     return d;
  91 }
  92
  93 /**************************************************************************
  94  *                              DRIVER_SendMessage              [internal]
  95  */
  96 static LRESULT inline DRIVER_SendMessage(LPWINE_DRIVER lpDrv, UINT msg,
  97                                          LPARAM lParam1, LPARAM lParam2)
  98 {
  99     LRESULT             ret = 0;
 100
 101     if (lpDrv->dwFlags & WINE_GDF_16BIT) {
 102         /* no need to check mmsystem presence: the driver must have been opened as a 16 bit one,
 103          */
 104         if (pFnSendMessage16)
 105             ret = pFnSendMessage16(lpDrv->d.d16.hDriver16, msg, lParam1, lParam2);
 106     } else {
 107         TRACE("Before call32 proc=%p drvrID=%08lx hDrv=%p wMsg=%04x p1=%08lx p2=%08lx\n",
 108               lpDrv->d.d32.lpDrvProc, lpDrv->d.d32.dwDriverID, (HDRVR)lpDrv, msg, lParam1, lParam2);
 109         ret = lpDrv->d.d32.lpDrvProc(lpDrv->d.d32.dwDriverID, (HDRVR)lpDrv, msg, lParam1, lParam2);
 110         TRACE("After  call32 proc=%p drvrID=%08lx hDrv=%p wMsg=%04x p1=%08lx p2=%08lx => %08lx\n",
 111               lpDrv->d.d32.lpDrvProc, lpDrv->d.d32.dwDriverID, (HDRVR)lpDrv, msg, lParam1, lParam2, ret);
 112     }
 113     return ret;
 114 }
 115
 116 /**************************************************************************
 117  *                              SendDriverMessage               [WINMM.@]
 118  *                              DrvSendMessage                  [WINMM.@]
 119  */
 120 LRESULT WINAPI SendDriverMessage(HDRVR hDriver, UINT msg, LPARAM lParam1,
 121                                  LPARAM lParam2)
 122 {
 123     LPWINE_DRIVER       lpDrv;
 124     LRESULT             retval = 0;
 125
 126     TRACE("(%p, %04X, %08lX, %08lX)\n", hDriver, msg, lParam1, lParam2);
 127
 128     if ((lpDrv = DRIVER_FindFromHDrvr(hDriver)) != NULL) {
 129         retval = DRIVER_SendMessage(lpDrv, msg, lParam1, lParam2);
 130     } else {
 131         WARN("Bad driver handle %p\n", hDriver);
 132     }
 133     TRACE("retval = %ld\n", retval);
 134
 135     return retval;
 136 }
 137
 138 /**************************************************************************
 139  *                              DRIVER_RemoveFromList           [internal]
 140  *
 141  * Generates all the logic to handle driver closure / deletion
 142  * Removes a driver struct to the list of open drivers.
 143  */
 144 static  BOOL    DRIVER_RemoveFromList(LPWINE_DRIVER lpDrv)
 145 {
 146     if (!(lpDrv->dwFlags & WINE_GDF_16BIT)) {
 147         /* last of this driver in list ? */
 148         if (DRIVER_GetNumberOfModuleRefs(lpDrv->d.d32.hModule, NULL) == 1) {
 149             DRIVER_SendMessage(lpDrv, DRV_DISABLE, 0L, 0L);
 150             DRIVER_SendMessage(lpDrv, DRV_FREE,    0L, 0L);
 151         }
 152     }
 153
 154     if (lpDrv->lpPrevItem)
 155         lpDrv->lpPrevItem->lpNextItem = lpDrv->lpNextItem;
 156     else
 157         lpDrvItemList = lpDrv->lpNextItem;
 158     if (lpDrv->lpNextItem)
 159         lpDrv->lpNextItem->lpPrevItem = lpDrv->lpPrevItem;
 160     /* trash magic number */
 161     lpDrv->dwMagic ^= 0xa5a5a5a5;
 162
 163     return TRUE;
 164 }
 165
 166 /**************************************************************************
 167  *                              DRIVER_AddToList                [internal]
 168  *
 169  * Adds a driver struct to the list of open drivers.
 170  * Generates all the logic to handle driver creation / open.
 171  */
 172 static  BOOL    DRIVER_AddToList(LPWINE_DRIVER lpNewDrv, LPARAM lParam1, LPARAM lParam2)
 173 {
 174     lpNewDrv->dwMagic = WINE_DI_MAGIC;
 175     /* First driver to be loaded for this module, need to load correctly the module */
 176     if (!(lpNewDrv->dwFlags & WINE_GDF_16BIT)) {
 177         /* first of this driver in list ? */
 178         if (DRIVER_GetNumberOfModuleRefs(lpNewDrv->d.d32.hModule, NULL) == 0) {
 179             if (DRIVER_SendMessage(lpNewDrv, DRV_LOAD, 0L, 0L) != DRV_SUCCESS) {
 180                 TRACE("DRV_LOAD failed on driver 0x%08lx\n", (DWORD)lpNewDrv);
 181                 return FALSE;
 182             }
 183             /* returned value is not checked */
 184             DRIVER_SendMessage(lpNewDrv, DRV_ENABLE, 0L, 0L);
 185         }
 186     }
 187
 188     lpNewDrv->lpNextItem = NULL;
 189     if (lpDrvItemList == NULL) {
 190         lpDrvItemList = lpNewDrv;
 191         lpNewDrv->lpPrevItem = NULL;
 192     } else {
 193         LPWINE_DRIVER   lpDrv = lpDrvItemList;  /* find end of list */
 194         while (lpDrv->lpNextItem != NULL)
 195             lpDrv = lpDrv->lpNextItem;
 196
 197         lpDrv->lpNextItem = lpNewDrv;
 198         lpNewDrv->lpPrevItem = lpDrv;
 199     }
 200
 201     if (!(lpNewDrv->dwFlags & WINE_GDF_16BIT)) {
 202         /* Now just open a new instance of a driver on this module */
 203         lpNewDrv->d.d32.dwDriverID = DRIVER_SendMessage(lpNewDrv, DRV_OPEN, lParam1, lParam2);
 204
 205         if (lpNewDrv->d.d32.dwDriverID == 0) {
 206             TRACE("DRV_OPEN failed on driver 0x%08lx\n", (DWORD)lpNewDrv);
 207             DRIVER_RemoveFromList(lpNewDrv);
 208             return FALSE;
 209         }
 210     }
 211     return TRUE;
 212 }
 213
 214 /**************************************************************************
 215  *                              DRIVER_GetLibName               [internal]
 216  *
 217  */
 218 BOOL    DRIVER_GetLibName(LPCWSTR keyName, LPCWSTR sectName, LPWSTR buf, int sz)
 219 {
 220     HKEY        hKey, hSecKey;
 221     DWORD       bufLen, lRet;
 222     static const WCHAR wszSystemIni[] = {'S','Y','S','T','E','M','.','I','N','I',0};
 223     WCHAR       wsznull = '\0';
 224
 225     lRet = RegOpenKeyExW(HKEY_LOCAL_MACHINE, HKLM_BASE, 0, KEY_QUERY_VALUE, &hKey);
 226     if (lRet == ERROR_SUCCESS) {
 227         lRet = RegOpenKeyExW(hKey, sectName, 0, KEY_QUERY_VALUE, &hSecKey);
 228         if (lRet == ERROR_SUCCESS) {
 229             bufLen = sz;
 230             lRet = RegQueryValueExW(hSecKey, keyName, 0, 0, (void*)buf, &bufLen);
 231             RegCloseKey( hSecKey );
 232         }
 233         RegCloseKey( hKey );
 234     }
 235     if (lRet == ERROR_SUCCESS) return TRUE;
 236     /* default to system.ini if we can't find it in the registry,
 237      * to support native installations where system.ini is still used */
 238     return GetPrivateProfileStringW(sectName, keyName, &wsznull, buf, sz / sizeof(WCHAR), wszSystemIni);
 239 }
 240
 241 /**************************************************************************
 242  *                              DRIVER_TryOpenDriver32          [internal]
 243  *
 244  * Tries to load a 32 bit driver whose DLL's (module) name is fn
 245  */
 246 LPWINE_DRIVER   DRIVER_TryOpenDriver32(LPCWSTR fn, LPARAM lParam2)
 247 {
 248     LPWINE_DRIVER       lpDrv = NULL;
 249     HMODULE             hModule = 0;
 250     LPWSTR              ptr;
 251     LPCSTR              cause = 0;
 252
 253     TRACE("(%s, %08lX);\n", debugstr_w(fn), lParam2);
 254
 255     if ((ptr = strchrW(fn, ' ')) != NULL) {
 256         *ptr++ = '\0';
 257         while (*ptr == ' ') ptr++;
 258         if (*ptr == '\0') ptr = NULL;
 259     }
 260
 261     lpDrv = HeapAlloc(GetProcessHeap(), 0, sizeof(WINE_DRIVER));
 262     if (lpDrv == NULL) {cause = "OOM"; goto exit;}
 263
 264     if ((hModule = LoadLibraryW(fn)) == 0) {cause = "Not a 32 bit lib"; goto exit;}
 265
 266     lpDrv->d.d32.lpDrvProc = (DRIVERPROC)GetProcAddress(hModule, "DriverProc");
 267     if (lpDrv->d.d32.lpDrvProc == NULL) {cause = "no DriverProc"; goto exit;}
 268
 269     lpDrv->dwFlags          = 0;
 270     lpDrv->d.d32.hModule    = hModule;
 271     lpDrv->d.d32.dwDriverID = 0;
 272
 273     /* Win32 installable drivers must support a two phase opening scheme:
 274      * + first open with NULL as lParam2 (session instance),
 275      * + then do a second open with the real non null lParam2)
 276      */
 277     if (DRIVER_GetNumberOfModuleRefs(lpDrv->d.d32.hModule, NULL) == 0 && lParam2)
 278     {
 279         LPWINE_DRIVER   ret;
 280
 281         if (!DRIVER_AddToList(lpDrv, (LPARAM)ptr, 0L))
 282         {
 283             cause = "load0 failed";
 284             goto exit;
 285         }
 286         ret = DRIVER_TryOpenDriver32(fn, lParam2);
 287         if (!ret)
 288         {
 289             CloseDriver((HDRVR)lpDrv, 0L, 0L);
 290             cause = "load1 failed";
 291             goto exit;
 292         }
 293         return ret;
 294     }
 295
 296     if (!DRIVER_AddToList(lpDrv, (LPARAM)ptr, lParam2))
 297     {cause = "load failed"; goto exit;}
 298
 299     TRACE("=> %p\n", lpDrv);
 300     return lpDrv;
 301  exit:
 302     FreeLibrary(hModule);
 303     HeapFree(GetProcessHeap(), 0, lpDrv);
 304     TRACE("Unable to load 32 bit module %s: %s\n", debugstr_w(fn), cause);
 305     return NULL;
 306 }
 307
 308 /**************************************************************************
 309  *                              OpenDriverA                     [WINMM.@]
 310  *                              DrvOpenA                        [WINMM.@]
 311  * (0,1,DRV_LOAD  ,0       ,0)
 312  * (0,1,DRV_ENABLE,0       ,0)
 313  * (0,1,DRV_OPEN  ,buf[256],0)
 314  */
 315 HDRVR WINAPI OpenDriverA(LPCSTR lpDriverName, LPCSTR lpSectionName, LPARAM lParam)
 316 {
 317     INT                 len;
 318     LPWSTR              dn = NULL;
 319     LPWSTR              sn = NULL;
 320     HDRVR               ret = 0;
 321
 322     if (lpDriverName)
 323     {
 324         len = MultiByteToWideChar( CP_ACP, 0, lpDriverName, -1, NULL, 0 );
 325         dn = HeapAlloc( GetProcessHeap(), 0, len * sizeof(WCHAR) );
 326         if (!dn) goto done;
 327         MultiByteToWideChar( CP_ACP, 0, lpDriverName, -1, dn, len );
 328     }
 329
 330     if (lpSectionName)
 331     {
 332         len = MultiByteToWideChar( CP_ACP, 0, lpSectionName, -1, NULL, 0 );
 333         sn = HeapAlloc( GetProcessHeap(), 0, len * sizeof(WCHAR) );
 334         if (!sn) goto done;
 335         MultiByteToWideChar( CP_ACP, 0, lpSectionName, -1, sn, len );
 336     }
 337
 338     ret = OpenDriver(dn, sn, lParam);
 339
 340 done:
 341     HeapFree(GetProcessHeap(), 0, dn);
 342     HeapFree(GetProcessHeap(), 0, sn);
 343     return ret;
 344 }
 345
 346 /**************************************************************************
 347  *                              OpenDriver                      [WINMM.@]
 348  *                              DrvOpen                         [WINMM.@]
 349  */
 350 HDRVR WINAPI OpenDriver(LPCWSTR lpDriverName, LPCWSTR lpSectionName, LPARAM lParam)
 351 {
 352     LPWINE_DRIVER       lpDrv = NULL;
 353     WCHAR               libName[128];
 354     LPCWSTR             lsn = lpSectionName;
 355
 356     TRACE("(%s, %s, 0x%08lx);\n",
 357           debugstr_w(lpDriverName), debugstr_w(lpSectionName), lParam);
 358
 359     if (lsn == NULL) {
 360         static const WCHAR wszDrivers32[] = {'D','r','i','v','e','r','s','3','2',0};
 361         lstrcpynW(libName, lpDriverName, sizeof(libName) / sizeof(WCHAR));
 362
 363         if ((lpDrv = DRIVER_TryOpenDriver32(libName, lParam)))
 364             goto the_end;
 365         lsn = wszDrivers32;
 366     }
 367     if (DRIVER_GetLibName(lpDriverName, lsn, libName, sizeof(libName)) &&
 368         (lpDrv = DRIVER_TryOpenDriver32(libName, lParam)))
 369         goto the_end;
 370
 371     /* now we will try a 16 bit driver (and add all the glue to make it work... which
 372      * is located in our mmsystem implementation)
 373      * so ensure, we can load our mmsystem, otherwise just fail
 374      */
 375     WINMM_CheckForMMSystem();
 376     if (pFnOpenDriver16 &&
 377         (lpDrv = pFnOpenDriver16(lpDriverName, lpSectionName, lParam)))
 378     {
 379         if (DRIVER_AddToList(lpDrv, 0, lParam)) goto the_end;
 380         HeapFree(GetProcessHeap(), 0, lpDrv);
 381     }
 382     TRACE("Failed to open driver %s from system.ini file, section %s\n",
 383           debugstr_w(lpDriverName), debugstr_w(lpSectionName));
 384     return 0;
 385
 386  the_end:
 387     if (lpDrv)  TRACE("=> %08lx\n", (DWORD)lpDrv);
 388     return (HDRVR)lpDrv;
 389 }
 390
 391 /**************************************************************************
 392  *                      CloseDriver                             [WINMM.@]
 393  *                      DrvClose                                [WINMM.@]
 394  */
 395 LRESULT WINAPI CloseDriver(HDRVR hDrvr, LPARAM lParam1, LPARAM lParam2)
 396 {
 397     LPWINE_DRIVER       lpDrv;
 398
 399     TRACE("(%p, %08lX, %08lX);\n", hDrvr, lParam1, lParam2);
 400
 401     if ((lpDrv = DRIVER_FindFromHDrvr(hDrvr)) != NULL)
 402     {
 403         if (lpDrv->dwFlags & WINE_GDF_16BIT)
 404         {
 405             if (pFnCloseDriver16)
 406                 pFnCloseDriver16(lpDrv->d.d16.hDriver16, lParam1, lParam2);
 407         }
 408         else
 409         {
 410             DRIVER_SendMessage(lpDrv, DRV_CLOSE, lParam1, lParam2);
 411             lpDrv->d.d32.dwDriverID = 0;
 412         }
 413         if (DRIVER_RemoveFromList(lpDrv)) {
 414             if (!(lpDrv->dwFlags & WINE_GDF_16BIT))
 415             {
 416                 LPWINE_DRIVER       lpDrv0;
 417
 418                 /* if driver has an opened session instance, we have to close it too */
 419                 if (DRIVER_GetNumberOfModuleRefs(lpDrv->d.d32.hModule, &lpDrv0) == 1)
 420                 {
 421                     DRIVER_SendMessage(lpDrv0, DRV_CLOSE, 0L, 0L);
 422                     lpDrv0->d.d32.dwDriverID = 0;
 423                     DRIVER_RemoveFromList(lpDrv0);
 424                     FreeLibrary(lpDrv0->d.d32.hModule);
 425                     HeapFree(GetProcessHeap(), 0, lpDrv0);
 426                 }
 427                 FreeLibrary(lpDrv->d.d32.hModule);
 428             }
 429             HeapFree(GetProcessHeap(), 0, lpDrv);
 430             return TRUE;
 431         }
 432     }
 433     WARN("Failed to close driver\n");
 434     return FALSE;
 435 }
 436
 437 /**************************************************************************
 438  *                              GetDriverFlags          [WINMM.@]
 439  * [in] hDrvr handle to the driver
 440  *
 441  * Returns:
 442  *      0x00000000 if hDrvr is an invalid handle
 443  *      0x80000000 if hDrvr is a valid 32 bit driver
 444  *      0x90000000 if hDrvr is a valid 16 bit driver
 445  *
 446  * native WINMM doesn't return those flags
 447  *      0x80000000 for a valid 32 bit driver and that's it
 448  *      (I may have mixed up the two flags :-(
 449  */
 450 DWORD   WINAPI GetDriverFlags(HDRVR hDrvr)
 451 {
 452     LPWINE_DRIVER       lpDrv;
 453     DWORD               ret = 0;
 454
 455     TRACE("(%p)\n", hDrvr);
 456
 457     if ((lpDrv = DRIVER_FindFromHDrvr(hDrvr)) != NULL) {
 458         ret = WINE_GDF_EXIST | lpDrv->dwFlags;
 459     }
 460     return ret;
 461 }
 462
 463 /**************************************************************************
 464  *                              GetDriverModuleHandle   [WINMM.@]
 465  *                              DrvGetModuleHandle      [WINMM.@]
 466  */
 467 HMODULE WINAPI GetDriverModuleHandle(HDRVR hDrvr)
 468 {
 469     LPWINE_DRIVER       lpDrv;
 470     HMODULE             hModule = 0;
 471
 472     TRACE("(%p);\n", hDrvr);
 473
 474     if ((lpDrv = DRIVER_FindFromHDrvr(hDrvr)) != NULL) {
 475         if (!(lpDrv->dwFlags & WINE_GDF_16BIT))
 476             hModule = lpDrv->d.d32.hModule;
 477     }
 478     TRACE("=> %p\n", hModule);
 479     return hModule;
 480 }
 481
 482 /**************************************************************************
 483  *                              DefDriverProc                     [WINMM.@]
 484  *                              DrvDefDriverProc                  [WINMM.@]
 485  */
 486 LRESULT WINAPI DefDriverProc(DWORD_PTR dwDriverIdentifier, HDRVR hDrv,
 487                              UINT Msg, LPARAM lParam1, LPARAM lParam2)
 488 {
 489     switch (Msg) {
 490     case DRV_LOAD:
 491     case DRV_FREE:
 492     case DRV_ENABLE:
 493     case DRV_DISABLE:
 494         return 1;
 495     case DRV_INSTALL:
 496     case DRV_REMOVE:
 497         return DRV_SUCCESS;
 498     default:
 499         return 0;
 500     }
 501 }
 502
 503 /**************************************************************************
 504  *                              DriverCallback                  [WINMM.@]
 505  */
 506 BOOL WINAPI DriverCallback(DWORD dwCallBack, UINT uFlags, HDRVR hDev,
 507                            UINT wMsg, DWORD dwUser, DWORD dwParam1,
 508                            DWORD dwParam2)
 509 {
 510     TRACE("(%08lX, %04X, %p, %04X, %08lX, %08lX, %08lX); !\n",
 511           dwCallBack, uFlags, hDev, wMsg, dwUser, dwParam1, dwParam2);
 512
 513     switch (uFlags & DCB_TYPEMASK) {
 514     case DCB_NULL:
 515         TRACE("Null !\n");
 516         if (dwCallBack)
 517             WARN("uFlags=%04X has null DCB value, but dwCallBack=%08lX is not null !\n", uFlags, dwCallBack);
 518         break;
 519     case DCB_WINDOW:
 520         TRACE("Window(%04lX) handle=%p!\n", dwCallBack, hDev);
 521         PostMessageA((HWND)dwCallBack, wMsg, (WPARAM)hDev, dwParam1);
 522         break;
 523     case DCB_TASK: /* aka DCB_THREAD */
 524         TRACE("Task(%04lx) !\n", dwCallBack);
 525         PostThreadMessageA(dwCallBack, wMsg, (WPARAM)hDev, dwParam1);
 526         break;
 527     case DCB_FUNCTION:
 528         TRACE("Function (32 bit) !\n");
 529         ((LPDRVCALLBACK)dwCallBack)(hDev, wMsg, dwUser, dwParam1, dwParam2);
 530         break;
 531     case DCB_EVENT:
 532         TRACE("Event(%08lx) !\n", dwCallBack);
 533         SetEvent((HANDLE)dwCallBack);
 534         break;
 535     case 6: /* I would dub it DCB_MMTHREADSIGNAL */
 536         /* this is an undocumented DCB_ value used for mmThreads
 537          * loword of dwCallBack contains the handle of the lpMMThd block
 538          * which dwSignalCount has to be incremented
 539          */
 540         if (pFnGetMMThread16)
 541         {
 542             WINE_MMTHREAD*      lpMMThd = pFnGetMMThread16(LOWORD(dwCallBack));
 543
 544             TRACE("mmThread (%04x, %p) !\n", LOWORD(dwCallBack), lpMMThd);
 545             /* same as mmThreadSignal16 */
 546             InterlockedIncrement(&lpMMThd->dwSignalCount);
 547             SetEvent(lpMMThd->hEvent);
 548             /* some other stuff on lpMMThd->hVxD */
 549         }
 550         break;
 551 #if 0
 552     case 4:
 553         /* this is an undocumented DCB_ value for... I don't know */
 554         break;
 555 #endif
 556     default:
 557         WARN("Unknown callback type %d\n", uFlags & DCB_TYPEMASK);
 558         return FALSE;
 559     }
 560     TRACE("Done\n");
 561     return TRUE;
 562 }
 563
 564 /******************************************************************
 565  *              DRIVER_UnloadAll
 566  *
 567  *
 568  */
 569 void    DRIVER_UnloadAll(void)
 570 {
 571     LPWINE_DRIVER       lpDrv;
 572     LPWINE_DRIVER       lpNextDrv = NULL;
 573     unsigned            count = 0;
 574
 575     for (lpDrv = lpDrvItemList; lpDrv != NULL; lpDrv = lpNextDrv)
 576     {
 577         lpNextDrv = lpDrv->lpNextItem;
 578         CloseDriver((HDRVR)lpDrv, 0, 0);
 579         count++;
 580     }
 581     TRACE("Unloaded %u drivers\n", count);
 582 }