f6b57d956d
This is the skeleton needed to implement classes that can be reused and work together, which can perform asynchronous tasks (read: need to wait for certain events before they can continue). An example would be the task of waiting for a given inventory folder to be read. This could then be used to improve the builtin AO (automatically reading that folder when a notecard is dropped, and continuing when the whole folder is read). It's first use will be communication with a filepicker that runs in a plugin.
66 lines
2.6 KiB
C++
66 lines
2.6 KiB
C++
/**
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* @file llcallbacklist.h
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* @brief A simple list of callback functions to call.
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*
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* $LicenseInfo:firstyear=2001&license=viewergpl$
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*
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* Copyright (c) 2001-2009, Linden Research, Inc.
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*
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* Second Life Viewer Source Code
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* The source code in this file ("Source Code") is provided by Linden Lab
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* to you under the terms of the GNU General Public License, version 2.0
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* ("GPL"), unless you have obtained a separate licensing agreement
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* ("Other License"), formally executed by you and Linden Lab. Terms of
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* the GPL can be found in doc/GPL-license.txt in this distribution, or
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* online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
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*
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* There are special exceptions to the terms and conditions of the GPL as
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* it is applied to this Source Code. View the full text of the exception
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* in the file doc/FLOSS-exception.txt in this software distribution, or
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* online at
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* http://secondlifegrid.net/programs/open_source/licensing/flossexception
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*
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* By copying, modifying or distributing this software, you acknowledge
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* that you have read and understood your obligations described above,
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* and agree to abide by those obligations.
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*
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* ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
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* WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
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* COMPLETENESS OR PERFORMANCE.
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* $/LicenseInfo$
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*/
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#ifndef LL_LLCALLBACKLIST_H
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#define LL_LLCALLBACKLIST_H
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#include "llstl.h"
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class LLCallbackList
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{
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public:
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typedef void (*callback_t)(void*);
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LLCallbackList();
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~LLCallbackList();
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void addFunction( callback_t func, void *data = NULL ); // register a callback, which will be called as func(data)
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BOOL containsFunction( callback_t func, void *data = NULL ); // true if list already contains the function/data pair
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BOOL deleteFunction( callback_t func, void *data = NULL ); // removes the first instance of this function/data pair from the list, false if not found
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void callFunctions(); // calls all functions
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void deleteAllFunctions();
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static void test();
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protected:
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// Use a list so that the callbacks are ordered in case that matters
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typedef std::pair<callback_t,void*> callback_pair_t; // callback_t is a (function) pointer. If it is NULL it means that the entry should be considered deleted.
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typedef std::list<callback_pair_t > callback_list_t;
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callback_list_t mCallbackList;
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bool mLoopingOverCallbackList; // True while looping over mCallbackList and calling the callback_t functions (see callFunctions).
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bool mNeedErase; // True when deleteFunction was called while mLoopingOverCallbackList was true.
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};
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extern LLCallbackList gIdleCallbacks;
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#endif
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