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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  21  */
  22
  23 #include "config.h"
  24 #include "wine/port.h"
  25
  26 #include <string.h>
  27 #include <stdarg.h>
  28 #include "windef.h"
  29 #include "winbase.h"
  30 #include "wingdi.h"
  31 #include "winuser.h"
  32 #include "winnls.h"
  33 #include "winreg.h"
  34 #include "mmddk.h"
  35 #include "winemm.h"
  36 #include "wine/debug.h"
  37 #include "wine/unicode.h"
  38 #include "excpt.h"
  39 #include "wine/exception.h"
  40
  41 WINE_DEFAULT_DEBUG_CHANNEL(driver);
  42
  43 static CRITICAL_SECTION mmdriver_lock;
  44 static CRITICAL_SECTION_DEBUG mmdriver_lock_debug =
  45 {
  46     0, 0, &mmdriver_lock,
  47     { &mmdriver_lock_debug.ProcessLocksList, &mmdriver_lock_debug.ProcessLocksList },
  48       0, 0, { (DWORD_PTR)(__FILE__ ": mmdriver_lock") }
  49 };
  50 static CRITICAL_SECTION mmdriver_lock = { &mmdriver_lock_debug, -1, 0, 0, 0, 0 };
  51
  52 static LPWINE_DRIVER   lpDrvItemList  /* = NULL */;
  53 static const WCHAR HKLM_BASE[] = {'S','o','f','t','w','a','r','e','\\','M','i','c','r','o','s','o','f','t','\\',
  54                                   'W','i','n','d','o','w','s',' ','N','T','\\','C','u','r','r','e','n','t','V','e','r','s','i','o','n',0};
  55
  56 WINE_MMTHREAD*  (*pFnGetMMThread16)(UINT16 h) /* = NULL */;
  57 LPWINE_DRIVER   (*pFnOpenDriver16)(LPCWSTR,LPCWSTR,LPARAM) /* = NULL */;
  58 LRESULT         (*pFnCloseDriver16)(UINT16,LPARAM,LPARAM) /* = NULL */;
  59 LRESULT         (*pFnSendMessage16)(UINT16,UINT,LPARAM,LPARAM) /* = NULL */;
  60
  61 static void DRIVER_Dump(const char *comment)
  62 {
  63 #if 0
  64     LPWINE_DRIVER       lpDrv;
  65
  66     TRACE("%s\n", comment);
  67
  68     EnterCriticalSection( &mmdriver_lock );
  69
  70     for (lpDrv = lpDrvItemList; lpDrv != NULL; lpDrv = lpDrv->lpNextItem)
  71     {
  72         TRACE("%p, magic %04lx, id %p, next %p\n", lpDrv, lpDrv->dwMagic, (void *)lpDrv->d.d32.dwDriverID, lpDrv->lpNextItem);
  73     }
  74
  75     LeaveCriticalSection( &mmdriver_lock );
  76 #endif
  77 }
  78
  79 /**************************************************************************
  80  *                      DRIVER_GetNumberOfModuleRefs            [internal]
  81  *
  82  * Returns the number of open drivers which share the same module.
  83  */
  84 static  unsigned DRIVER_GetNumberOfModuleRefs(HMODULE hModule, WINE_DRIVER** found)
  85 {
  86     LPWINE_DRIVER       lpDrv;
  87     unsigned            count = 0;
  88
  89     EnterCriticalSection( &mmdriver_lock );
  90
  91     if (found) *found = NULL;
  92     for (lpDrv = lpDrvItemList; lpDrv; lpDrv = lpDrv->lpNextItem)
  93     {
  94         if (!(lpDrv->dwFlags & WINE_GDF_16BIT) && lpDrv->d.d32.hModule == hModule)
  95         {
  96             if (found && !*found) *found = lpDrv;
  97             count++;
  98         }
  99     }
 100
 101     LeaveCriticalSection( &mmdriver_lock );
 102     return count;
 103 }
 104
 105 /**************************************************************************
 106  *                              DRIVER_FindFromHDrvr            [internal]
 107  *
 108  * From a hDrvr being 32 bits, returns the WINE internal structure.
 109  */
 110 LPWINE_DRIVER   DRIVER_FindFromHDrvr(HDRVR hDrvr)
 111 {
 112     LPWINE_DRIVER d;
 113
 114     __TRY
 115     {
 116         d = (LPWINE_DRIVER)hDrvr;
 117         if (d && d->dwMagic != WINE_DI_MAGIC) d = NULL;
 118     }
 119     __EXCEPT_PAGE_FAULT
 120     {
 121         return NULL;
 122     }
 123     __ENDTRY;
 124
 125     if (d) TRACE("%p -> %p, %p\n", hDrvr, d->d.d32.lpDrvProc, (void *)d->d.d32.dwDriverID);
 126     else TRACE("%p -> NULL\n", hDrvr);
 127
 128     return d;
 129 }
 130
 131 /**************************************************************************
 132  *                              DRIVER_SendMessage              [internal]
 133  */
 134 inline static LRESULT DRIVER_SendMessage(LPWINE_DRIVER lpDrv, UINT msg,
 135                                          LPARAM lParam1, LPARAM lParam2)
 136 {
 137     LRESULT             ret = 0;
 138
 139     if (lpDrv->dwFlags & WINE_GDF_16BIT) {
 140         /* no need to check mmsystem presence: the driver must have been opened as a 16 bit one,
 141          */
 142         if (pFnSendMessage16)
 143             ret = pFnSendMessage16(lpDrv->d.d16.hDriver16, msg, lParam1, lParam2);
 144     } else {
 145         TRACE("Before call32 proc=%p drvrID=%08lx hDrv=%p wMsg=%04x p1=%08lx p2=%08lx\n",
 146               lpDrv->d.d32.lpDrvProc, lpDrv->d.d32.dwDriverID, (HDRVR)lpDrv, msg, lParam1, lParam2);
 147         ret = lpDrv->d.d32.lpDrvProc(lpDrv->d.d32.dwDriverID, (HDRVR)lpDrv, msg, lParam1, lParam2);
 148         TRACE("After  call32 proc=%p drvrID=%08lx hDrv=%p wMsg=%04x p1=%08lx p2=%08lx => %08lx\n",
 149               lpDrv->d.d32.lpDrvProc, lpDrv->d.d32.dwDriverID, (HDRVR)lpDrv, msg, lParam1, lParam2, ret);
 150     }
 151     return ret;
 152 }
 153
 154 /**************************************************************************
 155  *                              SendDriverMessage               [WINMM.@]
 156  *                              DrvSendMessage                  [WINMM.@]
 157  */
 158 LRESULT WINAPI SendDriverMessage(HDRVR hDriver, UINT msg, LPARAM lParam1,
 159                                  LPARAM lParam2)
 160 {
 161     LPWINE_DRIVER       lpDrv;
 162     LRESULT             retval = 0;
 163
 164     TRACE("(%p, %04X, %08lX, %08lX)\n", hDriver, msg, lParam1, lParam2);
 165
 166     if ((lpDrv = DRIVER_FindFromHDrvr(hDriver)) != NULL) {
 167         retval = DRIVER_SendMessage(lpDrv, msg, lParam1, lParam2);
 168     } else {
 169         WARN("Bad driver handle %p\n", hDriver);
 170     }
 171     TRACE("retval = %ld\n", retval);
 172
 173     return retval;
 174 }
 175
 176 /**************************************************************************
 177  *                              DRIVER_RemoveFromList           [internal]
 178  *
 179  * Generates all the logic to handle driver closure / deletion
 180  * Removes a driver struct to the list of open drivers.
 181  */
 182 static  BOOL    DRIVER_RemoveFromList(LPWINE_DRIVER lpDrv)
 183 {
 184     if (!(lpDrv->dwFlags & WINE_GDF_16BIT)) {
 185         /* last of this driver in list ? */
 186         if (DRIVER_GetNumberOfModuleRefs(lpDrv->d.d32.hModule, NULL) == 1) {
 187             DRIVER_SendMessage(lpDrv, DRV_DISABLE, 0L, 0L);
 188             DRIVER_SendMessage(lpDrv, DRV_FREE,    0L, 0L);
 189         }
 190     }
 191
 192     EnterCriticalSection( &mmdriver_lock );
 193
 194     if (lpDrv->lpPrevItem)
 195         lpDrv->lpPrevItem->lpNextItem = lpDrv->lpNextItem;
 196     else
 197         lpDrvItemList = lpDrv->lpNextItem;
 198     if (lpDrv->lpNextItem)
 199         lpDrv->lpNextItem->lpPrevItem = lpDrv->lpPrevItem;
 200     /* trash magic number */
 201     lpDrv->dwMagic ^= 0xa5a5a5a5;
 202     lpDrv->d.d32.lpDrvProc = NULL;
 203     lpDrv->d.d32.dwDriverID = 0;
 204     lpDrv->d.d16.hDriver16 = 0;
 205
 206     LeaveCriticalSection( &mmdriver_lock );
 207
 208     return TRUE;
 209 }
 210
 211 /**************************************************************************
 212  *                              DRIVER_AddToList                [internal]
 213  *
 214  * Adds a driver struct to the list of open drivers.
 215  * Generates all the logic to handle driver creation / open.
 216  */
 217 static  BOOL    DRIVER_AddToList(LPWINE_DRIVER lpNewDrv, LPARAM lParam1, LPARAM lParam2)
 218 {
 219     lpNewDrv->dwMagic = WINE_DI_MAGIC;
 220     /* First driver to be loaded for this module, need to load correctly the module */
 221     if (!(lpNewDrv->dwFlags & WINE_GDF_16BIT)) {
 222         /* first of this driver in list ? */
 223         if (DRIVER_GetNumberOfModuleRefs(lpNewDrv->d.d32.hModule, NULL) == 0) {
 224             if (DRIVER_SendMessage(lpNewDrv, DRV_LOAD, 0L, 0L) != DRV_SUCCESS) {
 225                 TRACE("DRV_LOAD failed on driver %p\n", lpNewDrv);
 226                 return FALSE;
 227             }
 228             /* returned value is not checked */
 229             DRIVER_SendMessage(lpNewDrv, DRV_ENABLE, 0L, 0L);
 230         }
 231
 232         /* Now just open a new instance of a driver on this module */
 233         lpNewDrv->d.d32.dwDriverID = DRIVER_SendMessage(lpNewDrv, DRV_OPEN, lParam1, lParam2);
 234
 235         if (lpNewDrv->d.d32.dwDriverID == 0)
 236         {
 237             TRACE("DRV_OPEN failed on driver %p\n", lpNewDrv);
 238             return FALSE;
 239         }
 240     }
 241
 242     EnterCriticalSection( &mmdriver_lock );
 243
 244     lpNewDrv->lpNextItem = NULL;
 245     if (lpDrvItemList == NULL) {
 246         lpDrvItemList = lpNewDrv;
 247         lpNewDrv->lpPrevItem = NULL;
 248     } else {
 249         LPWINE_DRIVER   lpDrv = lpDrvItemList;  /* find end of list */
 250         while (lpDrv->lpNextItem != NULL)
 251             lpDrv = lpDrv->lpNextItem;
 252
 253         lpDrv->lpNextItem = lpNewDrv;
 254         lpNewDrv->lpPrevItem = lpDrv;
 255     }
 256
 257     LeaveCriticalSection( &mmdriver_lock );
 258     return TRUE;
 259 }
 260
 261 /**************************************************************************
 262  *                              DRIVER_GetLibName               [internal]
 263  *
 264  */
 265 BOOL    DRIVER_GetLibName(LPCWSTR keyName, LPCWSTR sectName, LPWSTR buf, int sz)
 266 {
 267     HKEY        hKey, hSecKey;
 268     DWORD       bufLen, lRet;
 269     static const WCHAR wszSystemIni[] = {'S','Y','S','T','E','M','.','I','N','I',0};
 270     WCHAR       wsznull = '\0';
 271
 272     TRACE("registry: %s, %s, %p, %d\n", debugstr_w(keyName), debugstr_w(sectName), buf, sz);
 273
 274     lRet = RegOpenKeyExW(HKEY_LOCAL_MACHINE, HKLM_BASE, 0, KEY_QUERY_VALUE, &hKey);
 275     if (lRet == ERROR_SUCCESS) {
 276         lRet = RegOpenKeyExW(hKey, sectName, 0, KEY_QUERY_VALUE, &hSecKey);
 277         if (lRet == ERROR_SUCCESS) {
 278             bufLen = sz;
 279             lRet = RegQueryValueExW(hSecKey, keyName, 0, 0, (void*)buf, &bufLen);
 280             RegCloseKey( hSecKey );
 281         }
 282         RegCloseKey( hKey );
 283     }
 284     if (lRet == ERROR_SUCCESS) return TRUE;
 285
 286     /* default to system.ini if we can't find it in the registry,
 287      * to support native installations where system.ini is still used */
 288     TRACE("system.ini: %s, %s, %p, %d\n", debugstr_w(keyName), debugstr_w(sectName), buf, sz);
 289     return GetPrivateProfileStringW(sectName, keyName, &wsznull, buf, sz / sizeof(WCHAR), wszSystemIni);
 290 }
 291
 292 /**************************************************************************
 293  *                              DRIVER_TryOpenDriver32          [internal]
 294  *
 295  * Tries to load a 32 bit driver whose DLL's (module) name is fn
 296  */
 297 LPWINE_DRIVER   DRIVER_TryOpenDriver32(LPCWSTR fn, LPARAM lParam2)
 298 {
 299     LPWINE_DRIVER       lpDrv = NULL;
 300     HMODULE             hModule = 0;
 301     LPWSTR              ptr;
 302     LPCSTR              cause = 0;
 303
 304     TRACE("(%s, %08lX);\n", debugstr_w(fn), lParam2);
 305
 306     if ((ptr = strchrW(fn, ' ')) != NULL) {
 307         *ptr++ = '\0';
 308         while (*ptr == ' ') ptr++;
 309         if (*ptr == '\0') ptr = NULL;
 310     }
 311
 312     lpDrv = HeapAlloc(GetProcessHeap(), 0, sizeof(WINE_DRIVER));
 313     if (lpDrv == NULL) {cause = "OOM"; goto exit;}
 314
 315     if ((hModule = LoadLibraryW(fn)) == 0) {cause = "Not a 32 bit lib"; goto exit;}
 316
 317     lpDrv->d.d32.lpDrvProc = (DRIVERPROC)GetProcAddress(hModule, "DriverProc");
 318     if (lpDrv->d.d32.lpDrvProc == NULL) {cause = "no DriverProc"; goto exit;}
 319
 320     lpDrv->dwFlags          = 0;
 321     lpDrv->d.d32.hModule    = hModule;
 322     lpDrv->d.d32.dwDriverID = 0;
 323
 324     /* Win32 installable drivers must support a two phase opening scheme:
 325      * + first open with NULL as lParam2 (session instance),
 326      * + then do a second open with the real non null lParam2)
 327      */
 328     if (DRIVER_GetNumberOfModuleRefs(lpDrv->d.d32.hModule, NULL) == 0 && lParam2)
 329     {
 330         LPWINE_DRIVER   ret;
 331
 332         if (!DRIVER_AddToList(lpDrv, (LPARAM)ptr, 0L))
 333         {
 334             cause = "load0 failed";
 335             goto exit;
 336         }
 337         ret = DRIVER_TryOpenDriver32(fn, lParam2);
 338         if (!ret)
 339         {
 340             CloseDriver((HDRVR)lpDrv, 0L, 0L);
 341             cause = "load1 failed";
 342             goto exit;
 343         }
 344         lpDrv->dwFlags |= WINE_GDF_SESSION;
 345         return ret;
 346     }
 347
 348     if (!DRIVER_AddToList(lpDrv, (LPARAM)ptr, lParam2))
 349     {cause = "load failed"; goto exit;}
 350
 351     TRACE("=> %p\n", lpDrv);
 352     return lpDrv;
 353  exit:
 354     FreeLibrary(hModule);
 355     HeapFree(GetProcessHeap(), 0, lpDrv);
 356     TRACE("Unable to load 32 bit module %s: %s\n", debugstr_w(fn), cause);
 357     return NULL;
 358 }
 359
 360 /**************************************************************************
 361  *                              OpenDriverA                     [WINMM.@]
 362  *                              DrvOpenA                        [WINMM.@]
 363  * (0,1,DRV_LOAD  ,0       ,0)
 364  * (0,1,DRV_ENABLE,0       ,0)
 365  * (0,1,DRV_OPEN  ,buf[256],0)
 366  */
 367 HDRVR WINAPI OpenDriverA(LPCSTR lpDriverName, LPCSTR lpSectionName, LPARAM lParam)
 368 {
 369     INT                 len;
 370     LPWSTR              dn = NULL;
 371     LPWSTR              sn = NULL;
 372     HDRVR               ret = 0;
 373
 374     if (lpDriverName)
 375     {
 376         len = MultiByteToWideChar( CP_ACP, 0, lpDriverName, -1, NULL, 0 );
 377         dn = HeapAlloc( GetProcessHeap(), 0, len * sizeof(WCHAR) );
 378         if (!dn) goto done;
 379         MultiByteToWideChar( CP_ACP, 0, lpDriverName, -1, dn, len );
 380     }
 381
 382     if (lpSectionName)
 383     {
 384         len = MultiByteToWideChar( CP_ACP, 0, lpSectionName, -1, NULL, 0 );
 385         sn = HeapAlloc( GetProcessHeap(), 0, len * sizeof(WCHAR) );
 386         if (!sn) goto done;
 387         MultiByteToWideChar( CP_ACP, 0, lpSectionName, -1, sn, len );
 388     }
 389
 390     ret = OpenDriver(dn, sn, lParam);
 391
 392 done:
 393     HeapFree(GetProcessHeap(), 0, dn);
 394     HeapFree(GetProcessHeap(), 0, sn);
 395     return ret;
 396 }
 397
 398 /**************************************************************************
 399  *                              OpenDriver                      [WINMM.@]
 400  *                              DrvOpen                         [WINMM.@]
 401  */
 402 HDRVR WINAPI OpenDriver(LPCWSTR lpDriverName, LPCWSTR lpSectionName, LPARAM lParam)
 403 {
 404     LPWINE_DRIVER       lpDrv = NULL;
 405     WCHAR               libName[MAX_PATH + 1];
 406     LPCWSTR             lsn = lpSectionName;
 407
 408     TRACE("(%s, %s, 0x%08lx);\n",
 409           debugstr_w(lpDriverName), debugstr_w(lpSectionName), lParam);
 410
 411     DRIVER_Dump("BEFORE:");
 412
 413     if (lsn == NULL) {
 414         static const WCHAR wszDrivers32[] = {'D','r','i','v','e','r','s','3','2',0};
 415         lstrcpynW(libName, lpDriverName, sizeof(libName) / sizeof(WCHAR));
 416
 417         if ((lpDrv = DRIVER_TryOpenDriver32(libName, lParam)))
 418             goto the_end;
 419         lsn = wszDrivers32;
 420     }
 421     if (DRIVER_GetLibName(lpDriverName, lsn, libName, sizeof(libName)) &&
 422         (lpDrv = DRIVER_TryOpenDriver32(libName, lParam)))
 423         goto the_end;
 424
 425     /* now we will try a 16 bit driver (and add all the glue to make it work... which
 426      * is located in our mmsystem implementation)
 427      * so ensure, we can load our mmsystem, otherwise just fail
 428      */
 429     WINMM_CheckForMMSystem();
 430     if (pFnOpenDriver16 &&
 431         (lpDrv = pFnOpenDriver16(lpDriverName, lpSectionName, lParam)))
 432     {
 433         if (DRIVER_AddToList(lpDrv, 0, lParam)) goto the_end;
 434         HeapFree(GetProcessHeap(), 0, lpDrv);
 435     }
 436     TRACE("Failed to open driver %s from system.ini file, section %s\n",
 437           debugstr_w(lpDriverName), debugstr_w(lpSectionName));
 438
 439 the_end:
 440     TRACE("=> %p\n", lpDrv);
 441
 442     DRIVER_Dump("AFTER:");
 443
 444     return (HDRVR)lpDrv;
 445 }
 446
 447 /**************************************************************************
 448  *                      CloseDriver                             [WINMM.@]
 449  *                      DrvClose                                [WINMM.@]
 450  */
 451 LRESULT WINAPI CloseDriver(HDRVR hDrvr, LPARAM lParam1, LPARAM lParam2)
 452 {
 453     BOOL ret;
 454     LPWINE_DRIVER       lpDrv;
 455
 456     TRACE("(%p, %08lX, %08lX);\n", hDrvr, lParam1, lParam2);
 457
 458     DRIVER_Dump("BEFORE:");
 459
 460     if ((lpDrv = DRIVER_FindFromHDrvr(hDrvr)) != NULL)
 461     {
 462         if (lpDrv->dwFlags & WINE_GDF_16BIT)
 463         {
 464             if (pFnCloseDriver16)
 465                 pFnCloseDriver16(lpDrv->d.d16.hDriver16, lParam1, lParam2);
 466         }
 467         else
 468             DRIVER_SendMessage(lpDrv, DRV_CLOSE, lParam1, lParam2);
 469
 470         DRIVER_RemoveFromList(lpDrv);
 471
 472         if (!(lpDrv->dwFlags & WINE_GDF_16BIT))
 473         {
 474             LPWINE_DRIVER lpDrv0;
 475
 476             if (lpDrv->dwFlags & WINE_GDF_SESSION)
 477                 FIXME("WINE_GDF_SESSION: Shouldn't happen (%p)\n", lpDrv);
 478             /* if driver has an opened session instance, we have to close it too */
 479             if (DRIVER_GetNumberOfModuleRefs(lpDrv->d.d32.hModule, &lpDrv0) == 1 &&
 480                 (lpDrv0->dwFlags & WINE_GDF_SESSION))
 481             {
 482                 DRIVER_SendMessage(lpDrv0, DRV_CLOSE, 0, 0);
 483                 DRIVER_RemoveFromList(lpDrv0);
 484                 FreeLibrary(lpDrv0->d.d32.hModule);
 485                 HeapFree(GetProcessHeap(), 0, lpDrv0);
 486             }
 487             FreeLibrary(lpDrv->d.d32.hModule);
 488         }
 489         HeapFree(GetProcessHeap(), 0, lpDrv);
 490         ret = TRUE;
 491     }
 492     else
 493     {
 494         WARN("Failed to close driver\n");
 495         ret = FALSE;
 496     }
 497
 498     DRIVER_Dump("AFTER:");
 499
 500     return ret;
 501 }
 502
 503 /**************************************************************************
 504  *                              GetDriverFlags          [WINMM.@]
 505  * [in] hDrvr handle to the driver
 506  *
 507  * Returns:
 508  *      0x00000000 if hDrvr is an invalid handle
 509  *      0x80000000 if hDrvr is a valid 32 bit driver
 510  *      0x90000000 if hDrvr is a valid 16 bit driver
 511  *
 512  * native WINMM doesn't return those flags
 513  *      0x80000000 for a valid 32 bit driver and that's it
 514  *      (I may have mixed up the two flags :-(
 515  */
 516 DWORD   WINAPI GetDriverFlags(HDRVR hDrvr)
 517 {
 518     LPWINE_DRIVER       lpDrv;
 519     DWORD               ret = 0;
 520
 521     TRACE("(%p)\n", hDrvr);
 522
 523     if ((lpDrv = DRIVER_FindFromHDrvr(hDrvr)) != NULL) {
 524         ret = WINE_GDF_EXIST | (lpDrv->dwFlags & WINE_GDF_EXTERNAL_MASK);
 525     }
 526     return ret;
 527 }
 528
 529 /**************************************************************************
 530  *                              GetDriverModuleHandle   [WINMM.@]
 531  *                              DrvGetModuleHandle      [WINMM.@]
 532  */
 533 HMODULE WINAPI GetDriverModuleHandle(HDRVR hDrvr)
 534 {
 535     LPWINE_DRIVER       lpDrv;
 536     HMODULE             hModule = 0;
 537
 538     TRACE("(%p);\n", hDrvr);
 539
 540     if ((lpDrv = DRIVER_FindFromHDrvr(hDrvr)) != NULL) {
 541         if (!(lpDrv->dwFlags & WINE_GDF_16BIT))
 542             hModule = lpDrv->d.d32.hModule;
 543     }
 544     TRACE("=> %p\n", hModule);
 545     return hModule;
 546 }
 547
 548 /**************************************************************************
 549  *                              DefDriverProc                     [WINMM.@]
 550  *                              DrvDefDriverProc                  [WINMM.@]
 551  */
 552 LRESULT WINAPI DefDriverProc(DWORD_PTR dwDriverIdentifier, HDRVR hDrv,
 553                              UINT Msg, LPARAM lParam1, LPARAM lParam2)
 554 {
 555     switch (Msg) {
 556     case DRV_LOAD:
 557     case DRV_FREE:
 558     case DRV_ENABLE:
 559     case DRV_DISABLE:
 560         return 1;
 561     case DRV_INSTALL:
 562     case DRV_REMOVE:
 563         return DRV_SUCCESS;
 564     default:
 565         return 0;
 566     }
 567 }
 568
 569 /**************************************************************************
 570  *                              DriverCallback                  [WINMM.@]
 571  */
 572 BOOL WINAPI DriverCallback(DWORD dwCallBack, UINT uFlags, HDRVR hDev,
 573                            UINT wMsg, DWORD dwUser, DWORD dwParam1,
 574                            DWORD dwParam2)
 575 {
 576     TRACE("(%08X, %04X, %p, %04X, %08X, %08X, %08X); !\n",
 577           dwCallBack, uFlags, hDev, wMsg, dwUser, dwParam1, dwParam2);
 578
 579     switch (uFlags & DCB_TYPEMASK) {
 580     case DCB_NULL:
 581         TRACE("Null !\n");
 582         if (dwCallBack)
 583             WARN("uFlags=%04X has null DCB value, but dwCallBack=%08X is not null !\n", uFlags, dwCallBack);
 584         break;
 585     case DCB_WINDOW:
 586         TRACE("Window(%04X) handle=%p!\n", dwCallBack, hDev);
 587         PostMessageA((HWND)dwCallBack, wMsg, (WPARAM)hDev, dwParam1);
 588         break;
 589     case DCB_TASK: /* aka DCB_THREAD */
 590         TRACE("Task(%04x) !\n", dwCallBack);
 591         PostThreadMessageA(dwCallBack, wMsg, (WPARAM)hDev, dwParam1);
 592         break;
 593     case DCB_FUNCTION:
 594         TRACE("Function (32 bit) !\n");
 595         ((LPDRVCALLBACK)dwCallBack)(hDev, wMsg, dwUser, dwParam1, dwParam2);
 596         break;
 597     case DCB_EVENT:
 598         TRACE("Event(%08x) !\n", dwCallBack);
 599         SetEvent((HANDLE)dwCallBack);
 600         break;
 601     case 6: /* I would dub it DCB_MMTHREADSIGNAL */
 602         /* this is an undocumented DCB_ value used for mmThreads
 603          * loword of dwCallBack contains the handle of the lpMMThd block
 604          * which dwSignalCount has to be incremented
 605          */
 606         if (pFnGetMMThread16)
 607         {
 608             WINE_MMTHREAD*      lpMMThd = pFnGetMMThread16(LOWORD(dwCallBack));
 609
 610             TRACE("mmThread (%04x, %p) !\n", LOWORD(dwCallBack), lpMMThd);
 611             /* same as mmThreadSignal16 */
 612             InterlockedIncrement(&lpMMThd->dwSignalCount);
 613             SetEvent(lpMMThd->hEvent);
 614             /* some other stuff on lpMMThd->hVxD */
 615         }
 616         break;
 617 #if 0
 618     case 4:
 619         /* this is an undocumented DCB_ value for... I don't know */
 620         break;
 621 #endif
 622     default:
 623         WARN("Unknown callback type %d\n", uFlags & DCB_TYPEMASK);
 624         return FALSE;
 625     }
 626     TRACE("Done\n");
 627     return TRUE;
 628 }
 629
 630 /******************************************************************
 631  *              DRIVER_UnloadAll
 632  *
 633  *
 634  */
 635 void    DRIVER_UnloadAll(void)
 636 {
 637     LPWINE_DRIVER       lpDrv;
 638     LPWINE_DRIVER       lpNextDrv = NULL;
 639     unsigned            count = 0;
 640
 641 restart:
 642     EnterCriticalSection( &mmdriver_lock );
 643
 644     for (lpDrv = lpDrvItemList; lpDrv != NULL; lpDrv = lpNextDrv)
 645     {
 646         lpNextDrv = lpDrv->lpNextItem;
 647
 648         /* session instances will be unloaded automatically */
 649         if (!(lpDrv->dwFlags & WINE_GDF_SESSION))
 650         {
 651             LeaveCriticalSection( &mmdriver_lock );
 652             CloseDriver((HDRVR)lpDrv, 0, 0);
 653             count++;
 654             /* restart from the beginning of the list */
 655             goto restart;
 656         }
 657     }
 658
 659     LeaveCriticalSection( &mmdriver_lock );
 660
 661     TRACE("Unloaded %u drivers\n", count);
 662 }