[Threading] Make the game run single-threaded

src/Components/Loader.cpp

@@ -55,6 +55,7 @@ namespace Components
 		Loader::Register(new FastFiles());
 		Loader::Register(new Gametypes());
 		Loader::Register(new Materials());
+		Loader::Register(new Threading());
 #ifndef DISABLE_BITMESSAGE
 		Loader::Register(new BitMessage());
 #endif

src/Components/Loader.hpp

@@ -70,6 +70,7 @@ namespace Components
 #include "Modules\Gametypes.hpp"
 #include "Modules\Materials.hpp"
 #include "Modules\Singleton.hpp"
+#include "Modules\Threading.hpp"
 #include "Modules\BitMessage.hpp"
 #include "Modules\FileSystem.hpp"
 #include "Modules\ModelSurfs.hpp"

src/Components/Modules/Threading.cpp

@@ -0,0 +1,47 @@
+#include "STDInclude.hpp"
+
+namespace Components
+{
+	__declspec(naked) void Threading::FrameEpilogueStub()
+	{
+		__asm
+		{
+			pop edi
+			pop esi
+			pop ebx
+			mov esp, ebp
+			pop ebp
+			retn
+		}
+	}
+
+	__declspec(naked) void Threading::PacketEventStub()
+	{
+		__asm
+		{
+			mov eax, 49F0B0h
+			call eax
+			mov eax, 458160h
+			jmp eax
+		}
+	}
+
+	Threading::Threading()
+	{
+		// remove starting of server thread from Com_Init_Try_Block_Function
+		Utils::Hook::Nop(0x60BEC0, 5);
+
+		// make server thread function jump to per-frame stuff
+		Utils::Hook(0x627049, 0x6271CE, HOOK_JUMP).install()->quick();
+
+		// make SV_WaitServer insta-return
+		Utils::Hook::Set<BYTE>(0x4256F0, 0xC3);
+
+		// dvar setting function, unknown stuff related to server thread sync
+		Utils::Hook::Set<BYTE>(0x647781, 0xEB);
+
+		Utils::Hook(0x627695, 0x627040, HOOK_CALL).install()->quick();
+		Utils::Hook(0x43D1C7, Threading::PacketEventStub, HOOK_JUMP).install()->quick();
+		Utils::Hook(0x6272E3, Threading::FrameEpilogueStub, HOOK_JUMP).install()->quick();
+	}
+}

src/Components/Modules/Threading.hpp

@@ -0,0 +1,16 @@
+namespace Components
+{
+	class Threading : public Component
+	{
+	public:
+		Threading();
+
+#if defined(DEBUG) || defined(FORCE_UNIT_TESTS)
+		const char* getName() { return "Threading"; };
+#endif
+
+	private:
+		static void FrameEpilogueStub();
+		static void PacketEventStub();
+	};
+}