Improved initialization of rehlds api

Prefer Sys_GetModuleHandle over Sys_LoadModule to avoid unnecessary reference count increase

reapi/include/cssdk/public/interface.cpp

@@ -121,6 +121,14 @@ void *Sys_GetProcAddress(void *pModuleHandle, const char *pName)
 	return GetProcAddress((HMODULE)pModuleHandle, pName);
 }
 
+// Purpose: Returns a module handle by its name.
+// Input  : pModuleName - module name
+// Output : the module handle or NULL in case of an error
+CSysModule *Sys_GetModuleHandle(const char *pModuleName)
+{
+	return reinterpret_cast<CSysModule *>(GetModuleHandle(pModuleName));
+}
+
 // Purpose: Loads a DLL/component from disk and returns a handle to it
 // Input  : *pModuleName - filename of the component
 // Output : opaque handle to the module (hides system dependency)

reapi/include/cssdk/public/interface.h

@@ -114,6 +114,8 @@ extern CreateInterfaceFn Sys_GetFactory(const char *pModuleName);
 // load/unload components
 class CSysModule;
 
+extern CSysModule *Sys_GetModuleHandle(const char *pModuleName);
+
 // Load & Unload should be called in exactly one place for each module
 // The factory for that module should be passed on to dependent components for
 // proper versioning.

reapi/src/mods/mod_regamedll_api.cpp

@@ -11,7 +11,7 @@ bool RegamedllApi_Init()
 	if (!szGameDLLModule)
 		return false;
 
-	CSysModule *gameModule = Sys_LoadModule(szGameDLLModule);
+	CSysModule *gameModule = Sys_GetModuleHandle(szGameDLLModule);
 	if (!gameModule)
 		return false;
 

reapi/src/mods/mod_rehlds_api.cpp

@@ -8,15 +8,24 @@ IRehldsServerStatic* g_RehldsSvs;
 
 bool RehldsApi_Init()
 {
-	if (!IS_DEDICATED_SERVER())
+#ifdef WIN32
+	// Find the most appropriate module handle from a list of DLL candidates
+	// Notes:
+	// - "swds.dll" is the library Dedicated Server
+	//
+	//    Let's also attempt to locate the ReHLDS API in the client's library
+	// - "sw.dll" is the client library for Software render, with a built-in listenserver
+	// - "hw.dll" is the client library for Hardware render, with a built-in listenserver
+	const char *dllNames[] = { "swds.dll", "sw.dll", "hw.dll" }; // List of DLL candidates to lookup for the ReHLDS API
+	CSysModule *engineModule = NULL; // The module handle of the selected DLL
+	for (const char *dllName : dllNames)
 	{
-		return false;
+		if (engineModule = Sys_GetModuleHandle(dllName))
+			break; // gotcha
 	}
 
-#ifdef WIN32
-	CSysModule* engineModule = Sys_LoadModule("swds.dll");
 #else
-	CSysModule* engineModule = Sys_LoadModule("engine_i486.so");
+	CSysModule *engineModule = Sys_GetModuleHandle("engine_i486.so");
 #endif
 
 	if (!engineModule)