quartz: Use an iface instead of a vtbl pointer in SystemClockImpl.

dlls/quartz/systemclock.c

@@ -37,7 +37,7 @@ struct SystemClockAdviseEntry {
 };
 
 typedef struct SystemClockImpl {
-  const IReferenceClockVtbl *lpVtbl;
+  IReferenceClock IReferenceClock_iface;
   LONG ref;
 
   /** IReferenceClock */
@@ -52,6 +52,11 @@ typedef struct SystemClockImpl {
   SystemClockAdviseEntry* pPeriodicAdvise;
 } SystemClockImpl;
 
+static inline SystemClockImpl *impl_from_IReferenceClock(IReferenceClock *iface)
+{
+    return CONTAINING_RECORD(iface, SystemClockImpl, IReferenceClock_iface);
+}
+
 
 static void QUARTZ_RemoveAviseEntryFromQueue(SystemClockImpl* This, SystemClockAdviseEntry* pEntry) {
   if (pEntry->prev) pEntry->prev->next = pEntry->next;
@@ -104,7 +109,7 @@ static DWORD WINAPI SystemClockAdviseThread(LPVOID lpParam) {
     
     EnterCriticalSection(&This->safe);
     /*timeOut = IReferenceClock_OnTimerUpdated(This); */
-    hr = IReferenceClock_GetTime((IReferenceClock*) This, &curTime);
+    hr = IReferenceClock_GetTime(&This->IReferenceClock_iface, &curTime);
     if (FAILED(hr)) {
       timeOut = INFINITE;
       goto outrefresh;
@@ -191,7 +196,7 @@ static BOOL SystemClockPostMessageToAdviseThread(SystemClockImpl* This, UINT iMs
 }
 
 static ULONG WINAPI SystemClockImpl_AddRef(IReferenceClock* iface) {
-  SystemClockImpl *This = (SystemClockImpl *)iface;
+  SystemClockImpl *This = impl_from_IReferenceClock(iface);
   ULONG ref = InterlockedIncrement(&This->ref);
 
   TRACE("(%p): AddRef from %d\n", This, ref - 1);
@@ -200,7 +205,7 @@ static ULONG WINAPI SystemClockImpl_AddRef(IReferenceClock* iface) {
 }
 
 static HRESULT WINAPI SystemClockImpl_QueryInterface(IReferenceClock* iface, REFIID riid, void** ppobj) {
-  SystemClockImpl *This = (SystemClockImpl *)iface;
+  SystemClockImpl *This = impl_from_IReferenceClock(iface);
   TRACE("(%p, %s,%p)\n", This, debugstr_guid(riid), ppobj);
   
   if (IsEqualIID (riid, &IID_IUnknown) || 
@@ -216,7 +221,7 @@ static HRESULT WINAPI SystemClockImpl_QueryInterface(IReferenceClock* iface, REF
 }
 
 static ULONG WINAPI SystemClockImpl_Release(IReferenceClock* iface) {
-  SystemClockImpl *This = (SystemClockImpl *)iface;
+  SystemClockImpl *This = impl_from_IReferenceClock(iface);
   ULONG ref = InterlockedDecrement(&This->ref);
   TRACE("(%p): ReleaseRef to %d\n", This, ref);
   if (ref == 0) {
@@ -232,7 +237,7 @@ static ULONG WINAPI SystemClockImpl_Release(IReferenceClock* iface) {
 }
 
 static HRESULT WINAPI SystemClockImpl_GetTime(IReferenceClock* iface, REFERENCE_TIME* pTime) {
-  SystemClockImpl *This = (SystemClockImpl *)iface;
+  SystemClockImpl *This = impl_from_IReferenceClock(iface);
   DWORD curTimeTickCount;
   HRESULT hr = S_OK;
 
@@ -254,7 +259,7 @@ static HRESULT WINAPI SystemClockImpl_GetTime(IReferenceClock* iface, REFERENCE_
 }
 
 static HRESULT WINAPI SystemClockImpl_AdviseTime(IReferenceClock* iface, REFERENCE_TIME rtBaseTime, REFERENCE_TIME rtStreamTime, HEVENT hEvent, DWORD_PTR* pdwAdviseCookie) {
-  SystemClockImpl *This = (SystemClockImpl *)iface;
+  SystemClockImpl *This = impl_from_IReferenceClock(iface);
   SystemClockAdviseEntry* pEntry = NULL;
 
   TRACE("(%p, 0x%s, 0x%s, %ld, %p)\n", This, wine_dbgstr_longlong(rtBaseTime),
@@ -290,7 +295,7 @@ static HRESULT WINAPI SystemClockImpl_AdviseTime(IReferenceClock* iface, REFEREN
 }
 
 static HRESULT WINAPI SystemClockImpl_AdvisePeriodic(IReferenceClock* iface, REFERENCE_TIME rtStartTime, REFERENCE_TIME rtPeriodTime, HSEMAPHORE hSemaphore, DWORD_PTR* pdwAdviseCookie) {
-  SystemClockImpl *This = (SystemClockImpl *)iface;
+  SystemClockImpl *This = impl_from_IReferenceClock(iface);
   SystemClockAdviseEntry* pEntry = NULL;
 
   TRACE("(%p, 0x%s, 0x%s, %ld, %p)\n", This, wine_dbgstr_longlong(rtStartTime),
@@ -326,7 +331,7 @@ static HRESULT WINAPI SystemClockImpl_AdvisePeriodic(IReferenceClock* iface, REF
 }
 
 static HRESULT WINAPI SystemClockImpl_Unadvise(IReferenceClock* iface, DWORD_PTR dwAdviseCookie) {
-  SystemClockImpl *This = (SystemClockImpl *)iface;
+  SystemClockImpl *This = impl_from_IReferenceClock(iface);
   SystemClockAdviseEntry* pEntry = NULL;
   SystemClockAdviseEntry* it = NULL;
   HRESULT ret = S_OK;
@@ -377,12 +382,12 @@ HRESULT QUARTZ_CreateSystemClock(IUnknown * pUnkOuter, LPVOID * ppv) {
   }
   ZeroMemory(obj, sizeof(SystemClockImpl));
 
-  obj->lpVtbl = &SystemClock_Vtbl;
+  obj->IReferenceClock_iface.lpVtbl = &SystemClock_Vtbl;
   obj->ref = 0;  /* will be inited by QueryInterface */
 
   obj->lastTimeTickCount = GetTickCount();
   InitializeCriticalSection(&obj->safe);
   obj->safe.DebugInfo->Spare[0] = (DWORD_PTR)(__FILE__ ": SystemClockImpl.safe");
 
-  return SystemClockImpl_QueryInterface((IReferenceClock*) obj, &IID_IReferenceClock, ppv);
+  return SystemClockImpl_QueryInterface(&obj->IReferenceClock_iface, &IID_IReferenceClock, ppv);
 }