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/**
* @file llrun.h
* @author Phoenix
* @date 2006-02-16
* @brief Declaration of LLRunner and LLRunnable classes.
*
* $LicenseInfo:firstyear=2006&license=viewergpl$
*
* Copyright (c) 2006-2009, 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_LLRUN_H
#define LL_LLRUN_H
#include <vector>
#include <boost/shared_ptr.hpp>
class LLRunnable;
/**
* @class LLRunner
* @brief This class manages a set of LLRunnable objects.
*
* An instance of this class has a collection of LLRunnable objects
* which are scheduled to run on a repeating or one time basis.
* @see LLRunnable
*/
class LL_COMMON_API LLRunner
{
public:
/**
* @brief The pointer to a runnable.
*/
typedef boost::shared_ptr<LLRunnable> run_ptr_t;
/**
* @brief The handle for use in the API.
*/
typedef S64 run_handle_t;
/**
* @brief Constructor.
*/
LLRunner();
/**
* @brief Destructor.
*/
~LLRunner();
/**
* @brief Enumeration which specifies when to run.
*/
enum ERunSchedule
{
// The runnable will run in N seconds
RUN_IN,
// The run every N seconds
RUN_EVERY,
// A count of the run types
RUN_SCHEDULE_COUNT
};
/**
* @brief Run the runnables which are scheduled to run
*
* @return Returns the number of runnables run.
*/
S32 run();
/**
* @brief Add a runnable to the run list.
*
* The handle of the runnable is unique to each addition. If the
* same runnable is added a second time with the same or different
* schedule, this method will return a new handle.
* @param runnable The runnable to run() on schedule.
* @param schedule Specifies the run schedule.
* @param seconds When to run the runnable as interpreted by schedule.
* @return Returns the handle to the runnable. handle == 0 means failure.
*/
run_handle_t addRunnable(
run_ptr_t runnable,
ERunSchedule schedule,
F64 seconds);
/**
* @brief Remove the specified runnable.
*
* @param handle The handle of the runnable to remove.
* @return Returns the pointer to the runnable removed which may
* be empty.
*/
run_ptr_t removeRunnable(run_handle_t handle);
protected:
struct LLRunInfo
{
run_handle_t mHandle;
run_ptr_t mRunnable;
ERunSchedule mSchedule;
F64 mNextRunAt;
F64 mIncrement;
LLRunInfo(
run_handle_t handle,
run_ptr_t runnable,
ERunSchedule schedule,
F64 next_run_at,
F64 increment);
};
typedef std::vector<LLRunInfo> run_list_t;
run_list_t mRunOnce;
run_list_t mRunEvery;
run_handle_t mNextHandle;
};
/**
* @class LLRunnable
* @brief Abstract base class for running some scheduled process.
*
* Users of the LLRunner class are expected to derive a concrete
* implementation of this class which overrides the run() method to do
* something useful.
* @see LLRunner
*/
class LL_COMMON_API LLRunnable
{
public:
LLRunnable();
virtual ~LLRunnable();
/**
* @brief Do the process.
*
* This method will be called from the LLRunner according to
* @param runner The Runner which call run().
* @param handle The handle this run instance is run under.
*/
virtual void run(LLRunner* runner, S64 handle) = 0;
};
#endif // LL_LLRUN_H
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