merge trunk@116587 skinning-7@119389 -> viewer-2.0.0-skinning-7

1 files changed, 100 insertions, 0 deletions

diff --git a/indra/llcommon/llinstancetracker.h b/indra/llcommon/llinstancetracker.h
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+++ b/indra/llcommon/llinstancetracker.h
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+/** 
+ * @file llinstancetracker.h
+ * @brief LLInstanceTracker is a mixin class that automatically tracks object
+ *        instances with or without an associated key
+ *
+ * $LicenseInfo:firstyear=2000&license=viewergpl$
+ * 
+ * Copyright (c) 2000-2009, Linden Research, Inc.
+ * 
+ * Second Life Viewer Source Code
+ * The source code in this file ("Source Code") is provided by Linden Lab
+ * to you under the terms of the GNU General Public License, version 2.0
+ * ("GPL"), unless you have obtained a separate licensing agreement
+ * ("Other License"), formally executed by you and Linden Lab.  Terms of
+ * the GPL can be found in doc/GPL-license.txt in this distribution, or
+ * online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
+ * 
+ * There are special exceptions to the terms and conditions of the GPL as
+ * it is applied to this Source Code. View the full text of the exception
+ * in the file doc/FLOSS-exception.txt in this software distribution, or
+ * online at
+ * http://secondlifegrid.net/programs/open_source/licensing/flossexception
+ * 
+ * By copying, modifying or distributing this software, you acknowledge
+ * that you have read and understood your obligations described above,
+ * and agree to abide by those obligations.
+ * 
+ * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
+ * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
+ * COMPLETENESS OR PERFORMANCE.
+ * $/LicenseInfo$
+ */
+
+#ifndef LL_LLINSTANCETRACKER_H
+#define LL_LLINSTANCETRACKER_H
+
+#include <map>
+
+#include "string_table.h"
+#include <boost/utility.hpp>
+
+// This mix-in class adds support for tracking all instances of the specificed class parameter T
+// The (optional) key associates a value of type KEY with a given instance of T, for quick lookup
+// If KEY is not provided, then instances are stored in a simple list
+template<typename T, typename KEY = T*>
+class LLInstanceTracker : boost::noncopyable
+{
+public:
+	typedef typename std::map<KEY, T*>::iterator instance_iter;
+	typedef typename std::map<KEY, T*>::const_iterator instance_const_iter;
+
+	static T* getInstance(const KEY& k) { instance_iter found = sInstances.find(k); return (found == sInstances.end()) ? NULL : found->second; }
+
+	static instance_iter beginInstances() { return sInstances.begin(); }
+	static instance_iter endInstances() { return sInstances.end(); }
+	static S32 instanceCount() { return sInstances.size(); }
+protected:
+	LLInstanceTracker(KEY key) { add(key); }
+	virtual ~LLInstanceTracker() { remove(); }
+	virtual void setKey(KEY key) { remove(); add(key); }
+	virtual const KEY& getKey() const { return mKey; }
+
+private:
+	void add(KEY key) 
+	{ 
+		mKey = key; 
+		sInstances[key] = static_cast<T*>(this); 
+	}
+	void remove() { sInstances.erase(mKey); }
+
+private:
+
+	KEY mKey;
+	static std::map<KEY, T*> sInstances;
+};
+
+template<typename T>
+class LLInstanceTracker<T, T*>
+{
+public:
+	typedef typename std::set<T*>::iterator instance_iter;
+	typedef typename std::set<T*>::const_iterator instance_const_iter;
+
+	static instance_iter instancesBegin() { return sInstances.begin(); }
+	static instance_iter instancesEnd() { return sInstances.end(); }
+	static S32 instanceCount() { return sInstances.size(); }
+
+protected:
+	LLInstanceTracker() { sInstances.insert(static_cast<T*>(this)); }
+	virtual ~LLInstanceTracker() { sInstances.erase(static_cast<T*>(this)); }
+
+	LLInstanceTracker(const LLInstanceTracker& other) { sInstances.insert(static_cast<T*>(this)); }
+
+	static std::set<T*> sInstances;
+};
+
+template <typename T, typename KEY> std::map<KEY, T*> LLInstanceTracker<T, KEY>::sInstances;
+template <typename T> std::set<T*> LLInstanceTracker<T, T*>::sInstances;
+
+#endif