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/**
* @file llcallbacklist.h
* @brief A simple list of callback functions to call.
*
* $LicenseInfo:firstyear=2001&license=viewerlgpl$
* 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 LL_LLCALLBACKLIST_H
#define LL_LLCALLBACKLIST_H
#include "llstl.h"
#include <boost/function.hpp>
#include <list>
class LLCallbackList
{
public:
typedef void (*callback_t)(void*);
typedef std::pair< callback_t,void* > callback_pair_t;
// NOTE: It is confirmed that we DEPEND on the order provided by using a list :(
//
typedef std::list< callback_pair_t > callback_list_t;
LLCallbackList();
~LLCallbackList();
void addFunction( callback_t func, void *data = NULL ); // register a callback, which will be called as func(data)
bool containsFunction( callback_t func, void *data = NULL ); // true if list already contains the function/data pair
bool deleteFunction( callback_t func, void *data = NULL ); // removes the first instance of this function/data pair from the list, false if not found
void callFunctions(); // calls all functions
void deleteAllFunctions();
static void test();
protected:
inline callback_list_t::iterator find(callback_t func, void *data);
callback_list_t mCallbackList;
};
typedef boost::function<void ()> nullary_func_t;
typedef boost::function<bool ()> bool_func_t;
// Call a given callable once in idle loop.
void doOnIdleOneTime(nullary_func_t callable);
// Repeatedly call a callable in idle loop until it returns true.
void doOnIdleRepeating(bool_func_t callable);
// Call a given callable once after specified interval.
void doAfterInterval(nullary_func_t callable, F32 seconds);
// Call a given callable every specified number of seconds, until it returns true.
void doPeriodically(bool_func_t callable, F32 seconds);
extern LLCallbackList gIdleCallbacks;
#endif
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