119 lines
3.4 KiB
C++
119 lines
3.4 KiB
C++
/*******************************************************************************
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* taskqueue.h
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*
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* ---------------------------------------------------------------------------
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* Persistence of Vision Ray Tracer ('POV-Ray') version 3.7.
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* Copyright 1991-2013 Persistence of Vision Raytracer Pty. Ltd.
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*
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* POV-Ray is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as
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* published by the Free Software Foundation, either version 3 of the
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* License, or (at your option) any later version.
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*
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* POV-Ray 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
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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* ---------------------------------------------------------------------------
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* POV-Ray is based on the popular DKB raytracer version 2.12.
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* DKBTrace was originally written by David K. Buck.
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* DKBTrace Ver 2.0-2.12 were written by David K. Buck & Aaron A. Collins.
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* ---------------------------------------------------------------------------
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* $File: //depot/public/povray/3.x/source/backend/support/taskqueue.h $
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* $Revision: #1 $
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* $Change: 6069 $
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* $DateTime: 2013/11/06 11:59:40 $
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* $Author: chrisc $
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*******************************************************************************/
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#ifndef POVRAY_BACKEND_TASKQUEUE_H
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#define POVRAY_BACKEND_TASKQUEUE_H
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#include <boost/thread.hpp>
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#include <boost/thread/condition.hpp>
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#include "base/povmscpp.h"
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#include "backend/support/task.h"
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namespace pov
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{
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using boost::recursive_mutex;
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class TaskQueue
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{
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class TaskEntry
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{
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public:
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enum EntryType
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{
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kTask,
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kSync,
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kMessage,
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kFunction,
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};
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TaskEntry(EntryType et) : entryType(et) { }
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TaskEntry(shared_ptr<Task> rt) : entryType(kTask), task(rt) { }
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TaskEntry(POVMS_Message& m) : entryType(kMessage), msg(m) { }
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TaskEntry(const boost::function1<void, TaskQueue&>& f) : entryType(kFunction), fn(f) { }
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~TaskEntry() { }
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shared_ptr<Task> GetTask() { return task; }
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POVMS_Message& GetMessage() { return msg; }
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boost::function1<void, TaskQueue&>& GetFunction() { return fn; }
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EntryType GetEntryType() { return entryType; }
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private:
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EntryType entryType;
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shared_ptr<Task> task;
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POVMS_Message msg;
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boost::function1<void, TaskQueue&> fn;
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};
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public:
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TaskQueue();
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~TaskQueue();
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void Stop();
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void Pause();
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void Resume();
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bool IsPaused();
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bool IsRunning();
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bool IsDone();
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bool Failed();
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int FailureCode(int defval = kNoError);
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Task::TaskData *AppendTask(Task *task);
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void AppendSync();
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void AppendMessage(POVMS_Message& msg);
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void AppendFunction(const boost::function1<void, TaskQueue&>& fn);
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bool Process();
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void Notify();
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private:
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/// queued task list
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std::queue<TaskEntry> queuedTasks;
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/// active task list
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list<TaskEntry> activeTasks;
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/// queue mutex
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boost::recursive_mutex queueMutex;
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/// failed code
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int failed;
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/// wait for data in queue or related operation to be processed
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boost::condition processCondition;
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/// not available
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TaskQueue(const TaskQueue&);
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/// not available
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TaskQueue& operator=(const TaskQueue&);
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};
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}
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#endif // POVRAY_BACKEND_TASKQUEUE_H
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