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/*
* WINE Drivers functions
*
* Copyright 1994 Martin Ayotte
* Copyright 1998 Marcus Meissner
* Copyright 1999 Eric Pouech
*
* 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 2.1 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
*/
#include "config.h"
#include "wine/port.h"
#include <string.h>
#include <stdarg.h>
#include "windef.h"
#include "winbase.h"
#include "wingdi.h"
#include "winuser.h"
#include "winnls.h"
#include "winreg.h"
#include "mmddk.h"
#include "winemm.h"
#include "wine/debug.h"
#include "wine/unicode.h"
#include "excpt.h"
#include "wine/exception.h"
WINE_DEFAULT_DEBUG_CHANNEL(driver);
static CRITICAL_SECTION mmdriver_lock;
static CRITICAL_SECTION_DEBUG mmdriver_lock_debug =
{
0, 0, &mmdriver_lock,
{ &mmdriver_lock_debug.ProcessLocksList, &mmdriver_lock_debug.ProcessLocksList },
0, 0, { (DWORD_PTR)(__FILE__ ": mmdriver_lock") }
};
static CRITICAL_SECTION mmdriver_lock = { &mmdriver_lock_debug, -1, 0, 0, 0, 0 };
static LPWINE_DRIVER lpDrvItemList /* = NULL */;
static const WCHAR HKLM_BASE[] = {'S','o','f','t','w','a','r','e','\\','M','i','c','r','o','s','o','f','t','\\',
'W','i','n','d','o','w','s',' ','N','T','\\','C','u','r','r','e','n','t','V','e','r','s','i','o','n',0};
WINE_MMTHREAD* (*pFnGetMMThread16)(UINT16 h) /* = NULL */;
LPWINE_DRIVER (*pFnOpenDriver16)(LPCWSTR,LPCWSTR,LPARAM) /* = NULL */;
LRESULT (*pFnCloseDriver16)(UINT16,LPARAM,LPARAM) /* = NULL */;
LRESULT (*pFnSendMessage16)(UINT16,UINT,LPARAM,LPARAM) /* = NULL */;
static void DRIVER_Dump(const char *comment)
{
#if 0
LPWINE_DRIVER lpDrv;
TRACE("%s\n", comment);
EnterCriticalSection( &mmdriver_lock );
for (lpDrv = lpDrvItemList; lpDrv != NULL; lpDrv = lpDrv->lpNextItem)
{
TRACE("%p, magic %04lx, id %p, next %p\n", lpDrv, lpDrv->dwMagic, (void *)lpDrv->d.d32.dwDriverID, lpDrv->lpNextItem);
}
LeaveCriticalSection( &mmdriver_lock );
#endif
}
/**************************************************************************
* DRIVER_GetNumberOfModuleRefs [internal]
*
* Returns the number of open drivers which share the same module.
*/
static unsigned DRIVER_GetNumberOfModuleRefs(HMODULE hModule, WINE_DRIVER** found)
{
LPWINE_DRIVER lpDrv;
unsigned count = 0;
EnterCriticalSection( &mmdriver_lock );
if (found) *found = NULL;
for (lpDrv = lpDrvItemList; lpDrv; lpDrv = lpDrv->lpNextItem)
{
if (!(lpDrv->dwFlags & WINE_GDF_16BIT) && lpDrv->d.d32.hModule == hModule)
{
if (found && !*found) *found = lpDrv;
count++;
}
}
LeaveCriticalSection( &mmdriver_lock );
return count;
}
/**************************************************************************
* DRIVER_FindFromHDrvr [internal]
*
* From a hDrvr being 32 bits, returns the WINE internal structure.
*/
LPWINE_DRIVER DRIVER_FindFromHDrvr(HDRVR hDrvr)
{
LPWINE_DRIVER d;
__TRY
{
d = (LPWINE_DRIVER)hDrvr;
if (d && d->dwMagic != WINE_DI_MAGIC) d = NULL;
}
__EXCEPT_PAGE_FAULT
{
return NULL;
}
__ENDTRY;
if (d) TRACE("%p -> %p, %p\n", hDrvr, d->d.d32.lpDrvProc, (void *)d->d.d32.dwDriverID);
else TRACE("%p -> NULL\n", hDrvr);
return d;
}
/**************************************************************************
* DRIVER_SendMessage [internal]
*/
static LRESULT inline DRIVER_SendMessage(LPWINE_DRIVER lpDrv, UINT msg,
LPARAM lParam1, LPARAM lParam2)
{
LRESULT ret = 0;
if (lpDrv->dwFlags & WINE_GDF_16BIT) {
/* no need to check mmsystem presence: the driver must have been opened as a 16 bit one,
*/
if (pFnSendMessage16)
ret = pFnSendMessage16(lpDrv->d.d16.hDriver16, msg, lParam1, lParam2);
} else {
TRACE("Before call32 proc=%p drvrID=%08lx hDrv=%p wMsg=%04x p1=%08lx p2=%08lx\n",
lpDrv->d.d32.lpDrvProc, lpDrv->d.d32.dwDriverID, (HDRVR)lpDrv, msg, lParam1, lParam2);
ret = lpDrv->d.d32.lpDrvProc(lpDrv->d.d32.dwDriverID, (HDRVR)lpDrv, msg, lParam1, lParam2);
TRACE("After call32 proc=%p drvrID=%08lx hDrv=%p wMsg=%04x p1=%08lx p2=%08lx => %08lx\n",
lpDrv->d.d32.lpDrvProc, lpDrv->d.d32.dwDriverID, (HDRVR)lpDrv, msg, lParam1, lParam2, ret);
}
return ret;
}
/**************************************************************************
* SendDriverMessage [WINMM.@]
* DrvSendMessage [WINMM.@]
*/
LRESULT WINAPI SendDriverMessage(HDRVR hDriver, UINT msg, LPARAM lParam1,
LPARAM lParam2)
{
LPWINE_DRIVER lpDrv;
LRESULT retval = 0;
TRACE("(%p, %04X, %08lX, %08lX)\n", hDriver, msg, lParam1, lParam2);
if ((lpDrv = DRIVER_FindFromHDrvr(hDriver)) != NULL) {
retval = DRIVER_SendMessage(lpDrv, msg, lParam1, lParam2);
} else {
WARN("Bad driver handle %p\n", hDriver);
}
TRACE("retval = %ld\n", retval);
return retval;
}
/**************************************************************************
* DRIVER_RemoveFromList [internal]
*
* Generates all the logic to handle driver closure / deletion
* Removes a driver struct to the list of open drivers.
*/
static BOOL DRIVER_RemoveFromList(LPWINE_DRIVER lpDrv)
{
if (!(lpDrv->dwFlags & WINE_GDF_16BIT)) {
/* last of this driver in list ? */
if (DRIVER_GetNumberOfModuleRefs(lpDrv->d.d32.hModule, NULL) == 1) {
DRIVER_SendMessage(lpDrv, DRV_DISABLE, 0L, 0L);
DRIVER_SendMessage(lpDrv, DRV_FREE, 0L, 0L);
}
}
EnterCriticalSection( &mmdriver_lock );
if (lpDrv->lpPrevItem)
lpDrv->lpPrevItem->lpNextItem = lpDrv->lpNextItem;
else
lpDrvItemList = lpDrv->lpNextItem;
if (lpDrv->lpNextItem)
lpDrv->lpNextItem->lpPrevItem = lpDrv->lpPrevItem;
/* trash magic number */
lpDrv->dwMagic ^= 0xa5a5a5a5;
lpDrv->d.d32.lpDrvProc = NULL;
lpDrv->d.d32.dwDriverID = 0;
lpDrv->d.d16.hDriver16 = 0;
LeaveCriticalSection( &mmdriver_lock );
return TRUE;
}
/**************************************************************************
* DRIVER_AddToList [internal]
*
* Adds a driver struct to the list of open drivers.
* Generates all the logic to handle driver creation / open.
*/
static BOOL DRIVER_AddToList(LPWINE_DRIVER lpNewDrv, LPARAM lParam1, LPARAM lParam2)
{
lpNewDrv->dwMagic = WINE_DI_MAGIC;
/* First driver to be loaded for this module, need to load correctly the module */
if (!(lpNewDrv->dwFlags & WINE_GDF_16BIT)) {
/* first of this driver in list ? */
if (DRIVER_GetNumberOfModuleRefs(lpNewDrv->d.d32.hModule, NULL) == 0) {
if (DRIVER_SendMessage(lpNewDrv, DRV_LOAD, 0L, 0L) != DRV_SUCCESS) {
TRACE("DRV_LOAD failed on driver %p\n", lpNewDrv);
return FALSE;
}
/* returned value is not checked */
DRIVER_SendMessage(lpNewDrv, DRV_ENABLE, 0L, 0L);
}
/* Now just open a new instance of a driver on this module */
lpNewDrv->d.d32.dwDriverID = DRIVER_SendMessage(lpNewDrv, DRV_OPEN, lParam1, lParam2);
if (lpNewDrv->d.d32.dwDriverID == 0)
{
TRACE("DRV_OPEN failed on driver %p\n", lpNewDrv);
return FALSE;
}
}
EnterCriticalSection( &mmdriver_lock );
lpNewDrv->lpNextItem = NULL;
if (lpDrvItemList == NULL) {
lpDrvItemList = lpNewDrv;
lpNewDrv->lpPrevItem = NULL;
} else {
LPWINE_DRIVER lpDrv = lpDrvItemList; /* find end of list */
while (lpDrv->lpNextItem != NULL)
lpDrv = lpDrv->lpNextItem;
lpDrv->lpNextItem = lpNewDrv;
lpNewDrv->lpPrevItem = lpDrv;
}
LeaveCriticalSection( &mmdriver_lock );
return TRUE;
}
/**************************************************************************
* DRIVER_GetLibName [internal]
*
*/
BOOL DRIVER_GetLibName(LPCWSTR keyName, LPCWSTR sectName, LPWSTR buf, int sz)
{
HKEY hKey, hSecKey;
DWORD bufLen, lRet;
static const WCHAR wszSystemIni[] = {'S','Y','S','T','E','M','.','I','N','I',0};
WCHAR wsznull = '\0';
TRACE("registry: %s, %s, %p, %d\n", debugstr_w(keyName), debugstr_w(sectName), buf, sz);
lRet = RegOpenKeyExW(HKEY_LOCAL_MACHINE, HKLM_BASE, 0, KEY_QUERY_VALUE, &hKey);
if (lRet == ERROR_SUCCESS) {
lRet = RegOpenKeyExW(hKey, sectName, 0, KEY_QUERY_VALUE, &hSecKey);
if (lRet == ERROR_SUCCESS) {
bufLen = sz;
lRet = RegQueryValueExW(hSecKey, keyName, 0, 0, (void*)buf, &bufLen);
RegCloseKey( hSecKey );
}
RegCloseKey( hKey );
}
if (lRet == ERROR_SUCCESS) return TRUE;
/* default to system.ini if we can't find it in the registry,
* to support native installations where system.ini is still used */
TRACE("system.ini: %s, %s, %p, %d\n", debugstr_w(keyName), debugstr_w(sectName), buf, sz);
return GetPrivateProfileStringW(sectName, keyName, &wsznull, buf, sz / sizeof(WCHAR), wszSystemIni);
}
/**************************************************************************
* DRIVER_TryOpenDriver32 [internal]
*
* Tries to load a 32 bit driver whose DLL's (module) name is fn
*/
LPWINE_DRIVER DRIVER_TryOpenDriver32(LPCWSTR fn, LPARAM lParam2)
{
LPWINE_DRIVER lpDrv = NULL;
HMODULE hModule = 0;
LPWSTR ptr;
LPCSTR cause = 0;
TRACE("(%s, %08lX);\n", debugstr_w(fn), lParam2);
if ((ptr = strchrW(fn, ' ')) != NULL) {
*ptr++ = '\0';
while (*ptr == ' ') ptr++;
if (*ptr == '\0') ptr = NULL;
}
lpDrv = HeapAlloc(GetProcessHeap(), 0, sizeof(WINE_DRIVER));
if (lpDrv == NULL) {cause = "OOM"; goto exit;}
if ((hModule = LoadLibraryW(fn)) == 0) {cause = "Not a 32 bit lib"; goto exit;}
lpDrv->d.d32.lpDrvProc = (DRIVERPROC)GetProcAddress(hModule, "DriverProc");
if (lpDrv->d.d32.lpDrvProc == NULL) {cause = "no DriverProc"; goto exit;}
lpDrv->dwFlags = 0;
lpDrv->d.d32.hModule = hModule;
lpDrv->d.d32.dwDriverID = 0;
/* Win32 installable drivers must support a two phase opening scheme:
* + first open with NULL as lParam2 (session instance),
* + then do a second open with the real non null lParam2)
*/
if (DRIVER_GetNumberOfModuleRefs(lpDrv->d.d32.hModule, NULL) == 0 && lParam2)
{
LPWINE_DRIVER ret;
if (!DRIVER_AddToList(lpDrv, (LPARAM)ptr, 0L))
{
cause = "load0 failed";
goto exit;
}
ret = DRIVER_TryOpenDriver32(fn, lParam2);
if (!ret)
{
CloseDriver((HDRVR)lpDrv, 0L, 0L);
cause = "load1 failed";
goto exit;
}
lpDrv->dwFlags |= WINE_GDF_SESSION;
return ret;
}
if (!DRIVER_AddToList(lpDrv, (LPARAM)ptr, lParam2))
{cause = "load failed"; goto exit;}
TRACE("=> %p\n", lpDrv);
return lpDrv;
exit:
FreeLibrary(hModule);
HeapFree(GetProcessHeap(), 0, lpDrv);
TRACE("Unable to load 32 bit module %s: %s\n", debugstr_w(fn), cause);
return NULL;
}
/**************************************************************************
* OpenDriverA [WINMM.@]
* DrvOpenA [WINMM.@]
* (0,1,DRV_LOAD ,0 ,0)
* (0,1,DRV_ENABLE,0 ,0)
* (0,1,DRV_OPEN ,buf[256],0)
*/
HDRVR WINAPI OpenDriverA(LPCSTR lpDriverName, LPCSTR lpSectionName, LPARAM lParam)
{
INT len;
LPWSTR dn = NULL;
LPWSTR sn = NULL;
HDRVR ret = 0;
if (lpDriverName)
{
len = MultiByteToWideChar( CP_ACP, 0, lpDriverName, -1, NULL, 0 );
dn = HeapAlloc( GetProcessHeap(), 0, len * sizeof(WCHAR) );
if (!dn) goto done;
MultiByteToWideChar( CP_ACP, 0, lpDriverName, -1, dn, len );
}
if (lpSectionName)
{
len = MultiByteToWideChar( CP_ACP, 0, lpSectionName, -1, NULL, 0 );
sn = HeapAlloc( GetProcessHeap(), 0, len * sizeof(WCHAR) );
if (!sn) goto done;
MultiByteToWideChar( CP_ACP, 0, lpSectionName, -1, sn, len );
}
ret = OpenDriver(dn, sn, lParam);
done:
HeapFree(GetProcessHeap(), 0, dn);
HeapFree(GetProcessHeap(), 0, sn);
return ret;
}
/**************************************************************************
* OpenDriver [WINMM.@]
* DrvOpen [WINMM.@]
*/
HDRVR WINAPI OpenDriver(LPCWSTR lpDriverName, LPCWSTR lpSectionName, LPARAM lParam)
{
LPWINE_DRIVER lpDrv = NULL;
WCHAR libName[MAX_PATH + 1];
LPCWSTR lsn = lpSectionName;
TRACE("(%s, %s, 0x%08lx);\n",
debugstr_w(lpDriverName), debugstr_w(lpSectionName), lParam);
DRIVER_Dump("BEFORE:");
if (lsn == NULL) {
static const WCHAR wszDrivers32[] = {'D','r','i','v','e','r','s','3','2',0};
lstrcpynW(libName, lpDriverName, sizeof(libName) / sizeof(WCHAR));
if ((lpDrv = DRIVER_TryOpenDriver32(libName, lParam)))
goto the_end;
lsn = wszDrivers32;
}
if (DRIVER_GetLibName(lpDriverName, lsn, libName, sizeof(libName)) &&
(lpDrv = DRIVER_TryOpenDriver32(libName, lParam)))
goto the_end;
/* now we will try a 16 bit driver (and add all the glue to make it work... which
* is located in our mmsystem implementation)
* so ensure, we can load our mmsystem, otherwise just fail
*/
WINMM_CheckForMMSystem();
if (pFnOpenDriver16 &&
(lpDrv = pFnOpenDriver16(lpDriverName, lpSectionName, lParam)))
{
if (DRIVER_AddToList(lpDrv, 0, lParam)) goto the_end;
HeapFree(GetProcessHeap(), 0, lpDrv);
}
TRACE("Failed to open driver %s from system.ini file, section %s\n",
debugstr_w(lpDriverName), debugstr_w(lpSectionName));
the_end:
TRACE("=> %p\n", lpDrv);
DRIVER_Dump("AFTER:");
return (HDRVR)lpDrv;
}
/**************************************************************************
* CloseDriver [WINMM.@]
* DrvClose [WINMM.@]
*/
LRESULT WINAPI CloseDriver(HDRVR hDrvr, LPARAM lParam1, LPARAM lParam2)
{
BOOL ret;
LPWINE_DRIVER lpDrv;
TRACE("(%p, %08lX, %08lX);\n", hDrvr, lParam1, lParam2);
DRIVER_Dump("BEFORE:");
if ((lpDrv = DRIVER_FindFromHDrvr(hDrvr)) != NULL)
{
if (lpDrv->dwFlags & WINE_GDF_16BIT)
{
if (pFnCloseDriver16)
pFnCloseDriver16(lpDrv->d.d16.hDriver16, lParam1, lParam2);
}
else
DRIVER_SendMessage(lpDrv, DRV_CLOSE, lParam1, lParam2);
DRIVER_RemoveFromList(lpDrv);
if (!(lpDrv->dwFlags & WINE_GDF_16BIT))
{
LPWINE_DRIVER lpDrv0;
if (lpDrv->dwFlags & WINE_GDF_SESSION)
FIXME("WINE_GDF_SESSION: Shouldn't happen (%p)\n", lpDrv);
/* if driver has an opened session instance, we have to close it too */
if (DRIVER_GetNumberOfModuleRefs(lpDrv->d.d32.hModule, &lpDrv0) == 1 &&
(lpDrv0->dwFlags & WINE_GDF_SESSION))
{
DRIVER_SendMessage(lpDrv0, DRV_CLOSE, 0, 0);
DRIVER_RemoveFromList(lpDrv0);
FreeLibrary(lpDrv0->d.d32.hModule);
HeapFree(GetProcessHeap(), 0, lpDrv0);
}
FreeLibrary(lpDrv->d.d32.hModule);
}
HeapFree(GetProcessHeap(), 0, lpDrv);
ret = TRUE;
}
else
{
WARN("Failed to close driver\n");
ret = FALSE;
}
DRIVER_Dump("AFTER:");
return ret;
}
/**************************************************************************
* GetDriverFlags [WINMM.@]
* [in] hDrvr handle to the driver
*
* Returns:
* 0x00000000 if hDrvr is an invalid handle
* 0x80000000 if hDrvr is a valid 32 bit driver
* 0x90000000 if hDrvr is a valid 16 bit driver
*
* native WINMM doesn't return those flags
* 0x80000000 for a valid 32 bit driver and that's it
* (I may have mixed up the two flags :-(
*/
DWORD WINAPI GetDriverFlags(HDRVR hDrvr)
{
LPWINE_DRIVER lpDrv;
DWORD ret = 0;
TRACE("(%p)\n", hDrvr);
if ((lpDrv = DRIVER_FindFromHDrvr(hDrvr)) != NULL) {
ret = WINE_GDF_EXIST | (lpDrv->dwFlags & WINE_GDF_EXTERNAL_MASK);
}
return ret;
}
/**************************************************************************
* GetDriverModuleHandle [WINMM.@]
* DrvGetModuleHandle [WINMM.@]
*/
HMODULE WINAPI GetDriverModuleHandle(HDRVR hDrvr)
{
LPWINE_DRIVER lpDrv;
HMODULE hModule = 0;
TRACE("(%p);\n", hDrvr);
if ((lpDrv = DRIVER_FindFromHDrvr(hDrvr)) != NULL) {
if (!(lpDrv->dwFlags & WINE_GDF_16BIT))
hModule = lpDrv->d.d32.hModule;
}
TRACE("=> %p\n", hModule);
return hModule;
}
/**************************************************************************
* DefDriverProc [WINMM.@]
* DrvDefDriverProc [WINMM.@]
*/
LRESULT WINAPI DefDriverProc(DWORD_PTR dwDriverIdentifier, HDRVR hDrv,
UINT Msg, LPARAM lParam1, LPARAM lParam2)
{
switch (Msg) {
case DRV_LOAD:
case DRV_FREE:
case DRV_ENABLE:
case DRV_DISABLE:
return 1;
case DRV_INSTALL:
case DRV_REMOVE:
return DRV_SUCCESS;
default:
return 0;
}
}
/**************************************************************************
* DriverCallback [WINMM.@]
*/
BOOL WINAPI DriverCallback(DWORD dwCallBack, UINT uFlags, HDRVR hDev,
UINT wMsg, DWORD dwUser, DWORD dwParam1,
DWORD dwParam2)
{
TRACE("(%08lX, %04X, %p, %04X, %08lX, %08lX, %08lX); !\n",
dwCallBack, uFlags, hDev, wMsg, dwUser, dwParam1, dwParam2);
switch (uFlags & DCB_TYPEMASK) {
case DCB_NULL:
TRACE("Null !\n");
if (dwCallBack)
WARN("uFlags=%04X has null DCB value, but dwCallBack=%08lX is not null !\n", uFlags, dwCallBack);
break;
case DCB_WINDOW:
TRACE("Window(%04lX) handle=%p!\n", dwCallBack, hDev);
PostMessageA((HWND)dwCallBack, wMsg, (WPARAM)hDev, dwParam1);
break;
case DCB_TASK: /* aka DCB_THREAD */
TRACE("Task(%04lx) !\n", dwCallBack);
PostThreadMessageA(dwCallBack, wMsg, (WPARAM)hDev, dwParam1);
break;
case DCB_FUNCTION:
TRACE("Function (32 bit) !\n");
((LPDRVCALLBACK)dwCallBack)(hDev, wMsg, dwUser, dwParam1, dwParam2);
break;
case DCB_EVENT:
TRACE("Event(%08lx) !\n", dwCallBack);
SetEvent((HANDLE)dwCallBack);
break;
case 6: /* I would dub it DCB_MMTHREADSIGNAL */
/* this is an undocumented DCB_ value used for mmThreads
* loword of dwCallBack contains the handle of the lpMMThd block
* which dwSignalCount has to be incremented
*/
if (pFnGetMMThread16)
{
WINE_MMTHREAD* lpMMThd = pFnGetMMThread16(LOWORD(dwCallBack));
TRACE("mmThread (%04x, %p) !\n", LOWORD(dwCallBack), lpMMThd);
/* same as mmThreadSignal16 */
InterlockedIncrement(&lpMMThd->dwSignalCount);
SetEvent(lpMMThd->hEvent);
/* some other stuff on lpMMThd->hVxD */
}
break;
#if 0
case 4:
/* this is an undocumented DCB_ value for... I don't know */
break;
#endif
default:
WARN("Unknown callback type %d\n", uFlags & DCB_TYPEMASK);
return FALSE;
}
TRACE("Done\n");
return TRUE;
}
/******************************************************************
* DRIVER_UnloadAll
*
*
*/
void DRIVER_UnloadAll(void)
{
LPWINE_DRIVER lpDrv;
LPWINE_DRIVER lpNextDrv = NULL;
unsigned count = 0;
restart:
EnterCriticalSection( &mmdriver_lock );
for (lpDrv = lpDrvItemList; lpDrv != NULL; lpDrv = lpNextDrv)
{
lpNextDrv = lpDrv->lpNextItem;
/* session instances will be unloaded automatically */
if (!(lpDrv->dwFlags & WINE_GDF_SESSION))
{
LeaveCriticalSection( &mmdriver_lock );
CloseDriver((HDRVR)lpDrv, 0, 0);
count++;
/* restart from the beginning of the list */
goto restart;
}
}
LeaveCriticalSection( &mmdriver_lock );
TRACE("Unloaded %u drivers\n", count);
}
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