llmemory.h cleanup. pulled llpointer, refcounter, smartpointer, singleton and safe handle out into their own headers. llmemory.h drags all those headers in for legacy support until everything else is cleaned up. getCurrentRSS() moved into LLMemory. getWorkingSetSize() added to LLMemory.

indra/llcommon/llpointer.h

@@ -0,0 +1,170 @@
+/** 
+ * @file llpointer.h
+ * @brief A reference-counted pointer for objects derived from LLRefCount
+ *
+ * $LicenseInfo:firstyear=2002&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2010, Linden Research, Inc.
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ * 
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+#ifndef LLPOINTER_H
+#define LLPOINTER_H
+
+#include "llerror.h"	// *TODO: consider eliminating this
+
+//----------------------------------------------------------------------------
+// RefCount objects should generally only be accessed by way of LLPointer<>'s
+// NOTE: LLPointer<LLFoo> x = new LLFoo(); MAY NOT BE THREAD SAFE
+//   if LLFoo::LLFoo() does anything like put itself in an update queue.
+//   The queue may get accessed before it gets assigned to x.
+// The correct implementation is:
+//   LLPointer<LLFoo> x = new LLFoo; // constructor does not do anything interesting
+//   x->instantiate(); // does stuff like place x into an update queue
+
+// see llthread.h for LLThreadSafeRefCount
+
+//----------------------------------------------------------------------------
+
+// Note: relies on Type having ref() and unref() methods
+template <class Type> class LLPointer
+{
+public:
+
+	LLPointer() : 
+		mPointer(NULL)
+	{
+	}
+
+	LLPointer(Type* ptr) : 
+		mPointer(ptr)
+	{
+		ref();
+	}
+
+	LLPointer(const LLPointer<Type>& ptr) : 
+		mPointer(ptr.mPointer)
+	{
+		ref();
+	}
+
+	// support conversion up the type hierarchy.  See Item 45 in Effective C++, 3rd Ed.
+	template<typename Subclass>
+	LLPointer(const LLPointer<Subclass>& ptr) : 
+		mPointer(ptr.get())
+	{
+		ref();
+	}
+
+	~LLPointer()								
+	{
+		unref();
+	}
+
+	Type*	get() const							{ return mPointer; }
+	const Type*	operator->() const				{ return mPointer; }
+	Type*	operator->()						{ return mPointer; }
+	const Type&	operator*() const				{ return *mPointer; }
+	Type&	operator*()							{ return *mPointer; }
+
+	operator BOOL()  const						{ return (mPointer != NULL); }
+	operator bool()  const						{ return (mPointer != NULL); }
+	bool operator!() const						{ return (mPointer == NULL); }
+	bool isNull() const							{ return (mPointer == NULL); }
+	bool notNull() const						{ return (mPointer != NULL); }
+
+	operator Type*()       const				{ return mPointer; }
+	bool operator !=(Type* ptr) const           { return (mPointer != ptr); 	}
+	bool operator ==(Type* ptr) const           { return (mPointer == ptr); 	}
+	bool operator ==(const LLPointer<Type>& ptr) const           { return (mPointer == ptr.mPointer); 	}
+	bool operator < (const LLPointer<Type>& ptr) const           { return (mPointer < ptr.mPointer); 	}
+	bool operator > (const LLPointer<Type>& ptr) const           { return (mPointer > ptr.mPointer); 	}
+
+	LLPointer<Type>& operator =(Type* ptr)                   
+	{ 
+		if( mPointer != ptr )
+		{
+			unref(); 
+			mPointer = ptr; 
+			ref();
+		}
+
+		return *this; 
+	}
+
+	LLPointer<Type>& operator =(const LLPointer<Type>& ptr)  
+	{ 
+		if( mPointer != ptr.mPointer )
+		{
+			unref(); 
+			mPointer = ptr.mPointer;
+			ref();
+		}
+		return *this; 
+	}
+
+	// support assignment up the type hierarchy. See Item 45 in Effective C++, 3rd Ed.
+	template<typename Subclass>
+	LLPointer<Type>& operator =(const LLPointer<Subclass>& ptr)  
+	{ 
+		if( mPointer != ptr.get() )
+		{
+			unref(); 
+			mPointer = ptr.get();
+			ref();
+		}
+		return *this; 
+	}
+	
+	// Just exchange the pointers, which will not change the reference counts.
+	static void swap(LLPointer<Type>& a, LLPointer<Type>& b)
+	{
+		Type* temp = a.mPointer;
+		a.mPointer = b.mPointer;
+		b.mPointer = temp;
+	}
+
+protected:
+	void ref()                             
+	{ 
+		if (mPointer)
+		{
+			mPointer->ref();
+		}
+	}
+
+	void unref()
+	{
+		if (mPointer)
+		{
+			Type *tempp = mPointer;
+			mPointer = NULL;
+			tempp->unref();
+			if (mPointer != NULL)
+			{
+				llwarns << "Unreference did assignment to non-NULL because of destructor" << llendl;
+				unref();
+			}
+		}
+	}
+
+protected:
+	Type*	mPointer;
+};
+
+#endif