[greatlrd] 25018: fixed follow bugs 1. Fixed memory crash bug for linking two directdraw interface 2. Fixed meoory alloc does not being overwrite when it being linked

Author: greatlrd
Date: Sat Dec  2 21:59:05 2006
New Revision: 25018

URL: http://svn.reactos.org/svn/reactos?rev=25018&view=rev
Log:
fixed follow bugs
1. Fixed memory crash bug for linking two directdraw interface
2. Fixed meoory alloc does not being overwrite when it being linked

Modified:
    trunk/reactos/dll/directx/ddraw/startup.c

Modified: trunk/reactos/dll/directx/ddraw/startup.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/dll/directx/ddraw/startup.…
==============================================================================
--- trunk/reactos/dll/directx/ddraw/startup.c (original)
+++ trunk/reactos/dll/directx/ddraw/startup.c Sat Dec  2 21:59:05 2006
@@ -33,27 +33,45 @@
     
     DX_WINDBG_trace();
 	  
-	RtlZeroMemory(&ddgbl, sizeof(DDRAWI_DIRECTDRAW_GBL));
+
+	if (This->lpLink == NULL)
+	{
+		RtlZeroMemory(&ddgbl, sizeof(DDRAWI_DIRECTDRAW_GBL));
+	    
+		if (ddgbl.lpDDCBtmp == NULL)
+		{
+			ddgbl.lpDDCBtmp = (LPDDHAL_CALLBACKS) DxHeapMemAlloc(sizeof(DDHAL_CALLBACKS));  
+			if (ddgbl.lpDDCBtmp == NULL)
+			{
+				DX_STUB_str("Out of memmory");
+				return DD_FALSE;
+			}
+		}
+		
+		
+	}
+
+	/* 
+	   Visual studio think this code is a break point if we call 
+	   second time to this function, press on continue in visual
+	   studio the program will work. No real bug. gcc 3.4.5 genreate 
+	   code that look like MS visual studio break point. 
+     */
+
+	This->lpLcl->lpDDCB = ddgbl.lpDDCBtmp;
+
+    /* Same for HEL and HAL */
+
+	if (ddgbl.lpModeInfo == NULL)
+	{
+		ddgbl.lpModeInfo = (DDHALMODEINFO*) DxHeapMemAlloc(1 * sizeof(DDHALMODEINFO));  
+		if (ddgbl.lpModeInfo == NULL)
+		{
+			DX_STUB_str("DD_FALSE");
+			return DD_FALSE;
+		}		   
+	}
     
-	ddgbl.lpDDCBtmp = (LPDDHAL_CALLBACKS) DxHeapMemAlloc(sizeof(DDHAL_CALLBACKS));  
-	if (ddgbl.lpDDCBtmp == NULL)
-	{
-	   DX_STUB_str("Out of memmory");
-       return DD_FALSE;
-	}	
-
-	This->lpLcl->lpDDCB = ddgbl.lpDDCBtmp;
-	
-	
-    /* Same for HEL and HAL */
-    This->lpLcl->lpGbl->lpModeInfo = (DDHALMODEINFO*) DxHeapMemAlloc(1 *
sizeof(DDHALMODEINFO));  
-	
-    if (This->lpLcl->lpGbl->lpModeInfo == NULL)
-    {
-	   DX_STUB_str("DD_FALSE");
-       return DD_FALSE;
-    }
-
     EnumDisplaySettings(NULL, ENUM_CURRENT_SETTINGS, &devmode);
 
     This->lpLcl->lpGbl->lpModeInfo[0].dwWidth      = devmode.dmPelsWidth;
@@ -62,7 +80,6 @@
     This->lpLcl->lpGbl->lpModeInfo[0].lPitch       =
(devmode.dmPelsWidth*devmode.dmBitsPerPel)/8;
     This->lpLcl->lpGbl->lpModeInfo[0].wRefreshRate =
(WORD)devmode.dmDisplayFrequency;
    
-
 	if (lpGuid == NULL) 
 	{
 		devicetypes = 1;
@@ -156,15 +173,10 @@
 	
 	This->lpLcl->lpDDCB = This->lpLcl->lpGbl->lpDDCBtmp;	  
 	This->lpLcl->dwProcessId = GetCurrentProcessId();
-
-    
-    
     
     hel_ret = StartDirectDrawHel(iface);
 	hal_ret = StartDirectDrawHal(iface);
 
-	
-
     if ((hal_ret!=DD_OK) &&  (hel_ret!=DD_OK))
     {
 		DX_STUB_str("DDERR_NODIRECTDRAWSUPPORT");
@@ -172,7 +184,6 @@
     }
 
 	This->lpLcl->hDD = This->lpLcl->lpGbl->hDD;
-
 
 	/* Mix the DDCALLBACKS */	
 	This->lpLcl->lpDDCB->cbDDCallbacks.dwSize =
sizeof(This->lpLcl->lpDDCB->cbDDCallbacks);
@@ -929,7 +940,7 @@
 	{		
 		return DDERR_INVALIDPARAMS;
 	}
-		
+	
 	if (StartDirectDraw((LPDIRECTDRAW*)This, pGUID) == DD_OK);
     {