Fixed some crashes related to server commands unregistration.

Author: jordanbriere

Diff for: addons/source-python/packages/source-python/cvars/__init__.py

@@ -8,6 +8,7 @@
 # Source.Python Imports
 #   Cvars
 from _cvars import ConVar
+from _cvars import SP_CVAR_DLL_IDENTIFIER
 from _cvars import _Cvar
 from cvars.flags import ConVarFlags
 
@@ -24,5 +25,6 @@
 # >> ALL DECLARATION
 # =============================================================================
 __all__ = ('ConVar',
+           'SP_CVAR_DLL_IDENTIFIER',
            'cvar',
            )

Diff for: src/core/modules/commands/commands_say.cpp

@@ -42,6 +42,7 @@
 
 #include "commands_say.h"
 #include "commands.h"
+#include "modules/cvars/cvars.h"
 
 
 //-----------------------------------------------------------------------------
@@ -191,8 +192,12 @@ SayConCommand::~SayConCommand()
 	// Get the ConCommand instance
 	ConCommand* pConCommand = g_pCVar->FindCommand(m_Name);
 
-	// Unregister the ConCommand
-	g_pCVar->UnregisterConCommand(pConCommand);
+	// Was the command overwritten as a ConVar or by another DLL?
+	if (pConCommand && pConCommand->GetDLLIdentifier() == CVarDLLIdentifier())
+	{
+		// Unregister the ConCommand
+		g_pCVar->UnregisterConCommand(pConCommand);
+	}
 
 	// Was the command registered before we registered it?
 	if( m_pOldCommand )

Diff for: src/core/modules/commands/commands_server.cpp

@@ -38,6 +38,7 @@
 
 #include "commands.h"
 #include "commands_server.h"
+#include "modules/cvars/cvars.h"
 
 //-----------------------------------------------------------------------------
 // Externs.
@@ -162,8 +163,12 @@ CServerCommandManager::~CServerCommandManager()
 	// Get the ConCommand instance
 	ConCommand* pConCommand = g_pCVar->FindCommand(m_Name);
 
-	// Unregister the ConCommand
-	g_pCVar->UnregisterConCommand(pConCommand);
+	// Was the command overwritten as a ConVar or by another DLL?
+	if (pConCommand && pConCommand->GetDLLIdentifier() == CVarDLLIdentifier())
+	{
+		// Unregister the ConCommand
+		g_pCVar->UnregisterConCommand(pConCommand);
+	}
 
 	// Was the command registered before we registered it?
 	if( m_pOldCommand )

Diff for: src/core/modules/cvars/cvars.h

@@ -34,6 +34,16 @@
 #include "utilities/sp_util.h"
 
 
+//-----------------------------------------------------------------------------
+// Returns Source.Python's DLL identifier.
+//-----------------------------------------------------------------------------
+inline CVarDLLIdentifier_t CVarDLLIdentifier()
+{
+	static CVarDLLIdentifier_t s_nDLLIdentifier = ConCommandBase().GetDLLIdentifier();
+	return s_nDLLIdentifier;
+}
+
+
 //-----------------------------------------------------------------------------
 // ConVar extension class.
 //-----------------------------------------------------------------------------

Diff for: src/core/modules/cvars/cvars_wrap.cpp

@@ -63,6 +63,9 @@ DECLARE_SP_MODULE(_cvars)
 	export_convar_interface(_cvars);
 	export_convar(_cvars);
 	export_convar_flags(_cvars);
+
+	// Constants...
+	_cvars.attr("SP_CVAR_DLL_IDENTIFIER") = object(CVarDLLIdentifier());
 }