163 lines
3.9 KiB
C++
163 lines
3.9 KiB
C++
/**
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* @file llrun.h
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* @author Phoenix
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* @date 2006-02-16
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* @brief Declaration of LLRunner and LLRunnable classes.
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*
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* $LicenseInfo:firstyear=2006&license=viewerlgpl$
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* Second Life Viewer Source Code
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* Copyright (C) 2010, Linden Research, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation;
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* version 2.1 of the License only.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
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* $/LicenseInfo$
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*/
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#ifndef LL_LLRUN_H
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#define LL_LLRUN_H
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#include <vector>
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#include <boost/shared_ptr.hpp>
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class LLRunnable;
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/**
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* @class LLRunner
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* @brief This class manages a set of LLRunnable objects.
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*
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* An instance of this class has a collection of LLRunnable objects
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* which are scheduled to run on a repeating or one time basis.
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* @see LLRunnable
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*/
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class LL_COMMON_API LLRunner
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{
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public:
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/**
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* @brief The pointer to a runnable.
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*/
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typedef boost::shared_ptr<LLRunnable> run_ptr_t;
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/**
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* @brief The handle for use in the API.
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*/
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typedef S64 run_handle_t;
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/**
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* @brief Constructor.
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*/
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LLRunner();
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/**
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* @brief Destructor.
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*/
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~LLRunner();
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/**
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* @brief Enumeration which specifies when to run.
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*/
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enum ERunSchedule
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{
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// The runnable will run in N seconds
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RUN_IN,
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// The run every N seconds
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RUN_EVERY,
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// A count of the run types
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RUN_SCHEDULE_COUNT
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};
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/**
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* @brief Run the runnables which are scheduled to run
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*
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* @return Returns the number of runnables run.
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*/
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S32 run();
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/**
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* @brief Add a runnable to the run list.
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*
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* The handle of the runnable is unique to each addition. If the
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* same runnable is added a second time with the same or different
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* schedule, this method will return a new handle.
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* @param runnable The runnable to run() on schedule.
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* @param schedule Specifies the run schedule.
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* @param seconds When to run the runnable as interpreted by schedule.
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* @return Returns the handle to the runnable. handle == 0 means failure.
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*/
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run_handle_t addRunnable(
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run_ptr_t runnable,
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ERunSchedule schedule,
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F64 seconds);
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/**
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* @brief Remove the specified runnable.
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*
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* @param handle The handle of the runnable to remove.
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* @return Returns the pointer to the runnable removed which may
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* be empty.
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*/
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run_ptr_t removeRunnable(run_handle_t handle);
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protected:
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struct LLRunInfo
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{
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run_handle_t mHandle;
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run_ptr_t mRunnable;
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ERunSchedule mSchedule;
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F64 mNextRunAt;
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F64 mIncrement;
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LLRunInfo(
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run_handle_t handle,
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run_ptr_t runnable,
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ERunSchedule schedule,
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F64 next_run_at,
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F64 increment);
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};
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typedef std::vector<LLRunInfo> run_list_t;
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run_list_t mRunOnce;
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run_list_t mRunEvery;
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run_handle_t mNextHandle;
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};
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/**
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* @class LLRunnable
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* @brief Abstract base class for running some scheduled process.
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*
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* Users of the LLRunner class are expected to derive a concrete
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* implementation of this class which overrides the run() method to do
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* something useful.
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* @see LLRunner
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*/
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class LL_COMMON_API LLRunnable
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{
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public:
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LLRunnable();
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virtual ~LLRunnable();
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/**
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* @brief Do the process.
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*
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* This method will be called from the LLRunner according to
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* @param runner The Runner which call run().
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* @param handle The handle this run instance is run under.
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*/
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virtual void run(LLRunner* runner, S64 handle) = 0;
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};
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#endif // LL_LLRUN_H
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