Imported existing code

indra/lscript/llscriptresource.h

@@ -0,0 +1,75 @@
+/** 
+ * @file llscriptresource.h
+ * @brief LLScriptResource class definition
+ *
+ * $LicenseInfo:firstyear=2008&license=viewergpl$
+ * 
+ * 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.
+ * $/LicenseInfo$
+ */
+
+#ifndef LL_LLSCRIPTRESOURCE_H
+#define LL_LLSCRIPTRESOURCE_H
+
+#include "stdtypes.h"
+
+// An LLScriptResource is a limited resource per ID.
+class LLScriptResource
+{
+public:
+	LLScriptResource();
+
+	// If amount resources are available will mark amount resouces 
+	// used and returns true
+	// Otherwise returns false and doesn't mark any resources used.
+	bool request(S32 amount = 1);
+
+	// Release amount resources from use if at least amount resources are used and return true
+	// If amount is more than currently used no resources are released and return false
+	bool release(S32 amount = 1);
+
+	// Returns how many resources are available
+	S32 getAvailable() const;
+
+	// Sets the total amount of available resources
+	// It is possible to set the amount to less than currently used
+	// Most likely to happen on parcel ownership change
+	void setTotal(S32 amount);
+
+	// Get the total amount of available resources
+	S32 getTotal() const;
+
+	// Get the number of resources used
+	S32 getUsed() const;
+
+	// true if more resources used than total available
+	bool isOverLimit() const;
+
+private:
+	S32 mTotal; // How many resources have been set aside
+	S32 mUsed; // How many resources are currently in use
+};
+
+#endif // LL_LLSCRIPTRESOURCE_H