dmusic: Simplify the creation of a DirectMusic8 object.

dlls/dmusic/dmusic.c

@@ -61,8 +61,6 @@ static ULONG WINAPI IDirectMusic8Impl_AddRef(LPDIRECTMUSIC8 iface)
 
     TRACE("(%p)->(): new ref = %u\n", This, ref);
 
-    DMUSIC_LockModule();
-
     return ref;
 }
 
@@ -78,10 +76,9 @@ static ULONG WINAPI IDirectMusic8Impl_Release(LPDIRECTMUSIC8 iface)
         HeapFree(GetProcessHeap(), 0, This->system_ports);
         HeapFree(GetProcessHeap(), 0, This->ppPorts);
         HeapFree(GetProcessHeap(), 0, This);
+        DMUSIC_UnlockModule();
     }
 
-    DMUSIC_UnlockModule();
-
     return ref;
 }
 
@@ -417,7 +414,7 @@ HRESULT WINAPI DMUSIC_CreateDirectMusicImpl(LPCGUID riid, LPVOID* ret_iface, LPU
         return E_OUTOFMEMORY;
 
     dmusic->IDirectMusic8_iface.lpVtbl = &DirectMusic8_Vtbl;
-    dmusic->ref = 0; /* Will be inited by QueryInterface */
+    dmusic->ref = 1;
     dmusic->pMasterClock = NULL;
     dmusic->ppPorts = NULL;
     dmusic->nrofports = 0;
@@ -427,14 +424,11 @@ HRESULT WINAPI DMUSIC_CreateDirectMusicImpl(LPCGUID riid, LPVOID* ret_iface, LPU
         return ret;
     }
 
-    ret = IDirectMusic8Impl_QueryInterface(&dmusic->IDirectMusic8_iface, riid, ret_iface);
-    if (FAILED(ret)) {
-        IReferenceClock_Release(&dmusic->pMasterClock->IReferenceClock_iface);
-        HeapFree(GetProcessHeap(), 0, dmusic);
-        return ret;
-    }
-
     create_system_ports_list(dmusic);
 
-    return S_OK;
+    DMUSIC_LockModule();
+    ret = IDirectMusic8Impl_QueryInterface(&dmusic->IDirectMusic8_iface, riid, ret_iface);
+    IDirectMusic8Impl_Release(&dmusic->IDirectMusic8_iface);
+
+    return ret;
 }