Limit GlobalMemoryStatus values to 2GB

DDrawCompat/DDrawCompat.vcxproj

@@ -231,6 +231,7 @@
     <ClInclude Include="Gdi\WinProc.h" />
     <ClInclude Include="Win32\DisplayMode.h" />
     <ClInclude Include="Win32\Log.h" />
+    <ClInclude Include="Win32\MemoryManagement.h" />
     <ClInclude Include="Win32\MsgHooks.h" />
     <ClInclude Include="Win32\Registry.h" />
     <ClInclude Include="Win32\WaitFunctions.h" />
@@ -303,6 +304,7 @@
     <ClCompile Include="Gdi\WinProc.cpp" />
     <ClCompile Include="Win32\DisplayMode.cpp" />
     <ClCompile Include="Win32\Log.cpp" />
+    <ClCompile Include="Win32\MemoryManagement.cpp" />
     <ClCompile Include="Win32\MsgHooks.cpp" />
     <ClCompile Include="Win32\Registry.cpp" />
     <ClCompile Include="Win32\WaitFunctions.cpp" />

DDrawCompat/DDrawCompat.vcxproj.filters

@@ -393,6 +393,9 @@
     <ClInclude Include="D3dDdi\DeviceState.h">
       <Filter>Header Files\D3dDdi</Filter>
     </ClInclude>
+    <ClInclude Include="Win32\MemoryManagement.h">
+      <Filter>Header Files\Win32</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <ClCompile Include="Gdi\Gdi.cpp">
@@ -605,5 +608,8 @@
     <ClCompile Include="D3dDdi\DeviceState.cpp">
       <Filter>Source Files\D3dDdi</Filter>
     </ClCompile>
+    <ClCompile Include="Win32\MemoryManagement.cpp">
+      <Filter>Source Files\Win32</Filter>
+    </ClCompile>
   </ItemGroup>
 </Project>

DDrawCompat/Dll/DllMain.cpp

@@ -18,6 +18,7 @@
 #include <Gdi/Gdi.h>
 #include <Gdi/VirtualScreen.h>
 #include <Win32/DisplayMode.h>
+#include <Win32/MemoryManagement.h>
 #include <Win32/MsgHooks.h>
 #include <Win32/Registry.h>
 #include <Win32/WaitFunctions.h>
@@ -273,6 +274,7 @@ BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved)
 		setDpiAwareness();
 		SetThemeAppProperties(0);
 
+		Win32::MemoryManagement::installHooks();
 		Win32::MsgHooks::installHooks();
 		Time::init();
 

DDrawCompat/Win32/Log.cpp

@@ -110,6 +110,19 @@ std::ostream& operator<<(std::ostream& os, HWND hwnd)
 		<< Compat::hex(GetWindowLong(hwnd, GWL_EXSTYLE));
 }
 
+std::ostream& operator<<(std::ostream& os, const MEMORYSTATUS& ms)
+{
+	return Compat::LogStruct(os)
+		<< ms.dwLength
+		<< ms.dwMemoryLoad
+		<< ms.dwTotalPhys
+		<< ms.dwAvailPhys
+		<< ms.dwTotalPageFile
+		<< ms.dwAvailPageFile
+		<< ms.dwTotalVirtual
+		<< ms.dwAvailVirtual;
+}
+
 std::ostream& operator<<(std::ostream& os, const MSG& msg)
 {
 	return Compat::LogStruct(os)

DDrawCompat/Win32/Log.h

@@ -12,6 +12,7 @@ std::ostream& operator<<(std::ostream& os, const DEVMODEW& dm);
 std::ostream& operator<<(std::ostream& os, HDC dc);
 std::ostream& operator<<(std::ostream& os, HRGN rgn);
 std::ostream& operator<<(std::ostream& os, HWND hwnd);
+std::ostream& operator<<(std::ostream& os, const MEMORYSTATUS& ms);
 std::ostream& operator<<(std::ostream& os, const MSG& msg);
 std::ostream& operator<<(std::ostream& os, const RECT& rect);
 

DDrawCompat/Win32/MemoryManagement.cpp

@@ -0,0 +1,41 @@
+#include <Windows.h>
+
+#include <Common/Hook.h>
+#include <Common/Log.h>
+#include <Win32/MemoryManagement.h>
+
+namespace
+{
+	void limitTo2Gb(SIZE_T& mem);
+
+	void WINAPI globalMemoryStatus(LPMEMORYSTATUS lpBuffer)
+	{
+		LOG_FUNC("GlobalMemoryStatus", lpBuffer);
+		CALL_ORIG_FUNC(GlobalMemoryStatus)(lpBuffer);
+		limitTo2Gb(lpBuffer->dwTotalPhys);
+		limitTo2Gb(lpBuffer->dwAvailPhys);
+		limitTo2Gb(lpBuffer->dwTotalPageFile);
+		limitTo2Gb(lpBuffer->dwAvailPageFile);
+		limitTo2Gb(lpBuffer->dwTotalVirtual);
+		limitTo2Gb(lpBuffer->dwAvailVirtual);
+	}
+
+	void limitTo2Gb(SIZE_T& mem)
+	{
+		if (mem > INT_MAX)
+		{
+			mem = INT_MAX;
+		}
+	}
+}
+
+namespace Win32
+{
+	namespace MemoryManagement
+	{
+		void installHooks()
+		{
+			HOOK_FUNCTION(kernel32, GlobalMemoryStatus, globalMemoryStatus);
+		}
+	}
+}

DDrawCompat/Win32/MemoryManagement.h

@@ -0,0 +1,9 @@
+#pragma once
+
+namespace Win32
+{
+	namespace MemoryManagement
+	{
+		void installHooks();
+	}
+}