Fix various problems with unloading ClientPrefs and SourceMod (bug 5874, r=ds).

--HG--
extra : rebase_source : 0a35f8380d651ca65fac9dd402c5cd3625e3105c

public/sample_ext/sdk/smsdk_ext.cpp

@@ -1,5 +1,5 @@
 /**
- * vim: set ts=4 :
+ * vim: set ts=4 sw=4 tw=99 noet:
  * =============================================================================
  * SourceMod Base Extension Code
  * Copyright (C) 2004-2008 AlliedModders LLC.  All rights reserved.
@@ -239,6 +239,11 @@ void SDKExtension::OnExtensionUnload()
 	SDK_OnUnload();
 }
 
+void SDKExtension::OnDependenciesDropped()
+{
+	SDK_OnDependenciesDropped();
+}
+
 const char *SDKExtension::GetExtensionAuthor()
 {
 	return SMEXT_CONF_AUTHOR;
@@ -291,6 +296,10 @@ void SDKExtension::SDK_OnAllLoaded()
 {
 }
 
+void SDKExtension::SDK_OnDependenciesDropped()
+{
+}
+
 #if defined SMEXT_CONF_METAMOD
 
 PluginId g_PLID = 0;						/**< Metamod plugin ID */

public/sample_ext/sdk/smsdk_ext.h

@@ -1,5 +1,5 @@
 /**
- * vim: set ts=4 :
+ * vim: set ts=4 sw=4 tw=99 noet:
  * =============================================================================
  * SourceMod Base Extension Code
  * Copyright (C) 2004-2008 AlliedModders LLC.  All rights reserved.
@@ -127,7 +127,7 @@ public:
 	virtual bool SDK_OnLoad(char *error, size_t maxlength, bool late);
 	
 	/**
-	 * @brief This is called right before the extension is unloaded.
+	 * @brief This is called once the extension unloading process begins.
 	 */
 	virtual void SDK_OnUnload();
 
@@ -141,6 +141,12 @@ public:
 	 */
 	virtual void SDK_OnPauseChange(bool paused);
 
+	/**
+	 * @brief Called after SDK_OnUnload, once all dependencies have been
+	 * removed, and the extension is about to be removed from memory.
+	 */
+	virtual void SDK_OnDependenciesDropped();
+
 #if defined SMEXT_CONF_METAMOD
 	/**
 	 * @brief Called when Metamod is attached, before the extension version is called.
@@ -203,6 +209,9 @@ public: //IExtensionInterface
 	virtual const char *GetExtensionDescription();
 	/** Returns date string */
 	virtual const char *GetExtensionDateString();
+
+	/** Called after OnExtensionUnload, once dependencies have been dropped. */
+	virtual void OnDependenciesDropped();
 #if defined SMEXT_CONF_METAMOD
 public: //ISmmPlugin
 	/** Called when the extension is attached to Metamod. */