Imported existing code

indra/lscript/lscript_execute/llscriptresource.cpp

@@ -0,0 +1,97 @@
+/** 
+ * @file llscriptresource.cpp
+ * @brief LLScriptResource class implementation for managing limited resources
+ *
+ * $LicenseInfo:firstyear=2008&license=viewergpl$
+ * 
+ * Copyright (c) 2008-2009, 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.
+ * $/LicenseInfo$
+ */
+
+#include "llscriptresource.h"
+#include "llerror.h"
+
+LLScriptResource::LLScriptResource()
+: mTotal(0),
+  mUsed(0)
+{
+}
+
+bool LLScriptResource::request(S32 amount /* = 1 */)
+{
+	if (mUsed + amount <= mTotal)
+	{
+		mUsed += amount;
+		return true;
+	}
+
+	return false;
+}
+
+bool LLScriptResource::release(S32 amount /* = 1 */)
+{
+	if (mUsed >= amount)
+	{
+		mUsed -= amount;
+		return true;
+	}
+
+	return false;
+}
+
+S32 LLScriptResource::getAvailable() const
+{
+	if (mUsed > mTotal)
+	{
+		// It is possible after a parcel ownership change for more than total to be used
+		// In this case the user of this class just wants to know 
+		// whether or not they can use a resource
+		return 0;
+	}
+	return (mTotal - mUsed);
+}
+
+void LLScriptResource::setTotal(S32 amount)
+{
+	// This may cause this resource to be over spent
+	// such that more are in use than total allowed
+	// Until those resources are released getAvailable will return 0.
+	mTotal = amount;
+}
+
+S32 LLScriptResource::getTotal() const
+{
+	return mTotal;
+}
+
+S32 LLScriptResource::getUsed() const
+{
+	return mUsed;
+}
+
+bool LLScriptResource::isOverLimit() const
+{
+	return (mUsed > mTotal);
+}