task.hxx

Go to the documentation of this file.

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
 * This file is part of the LibreOffice project.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
 *   with this work for additional information regarding copyright
 *   ownership. The ASF licenses this file to you under the Apache
 *   License, Version 2.0 (the "License"); you may not use this file
 *   except in compliance with the License. You may obtain a copy of
 *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
 */
 
#ifndef INCLUDED_VCL_TASK_HXX
#define INCLUDED_VCL_TASK_HXX
 
#include <vcl/dllapi.h>
 
struct ImplSchedulerData;
 
enum class TaskPriority
{
    HIGHEST,       
    DEFAULT,       
    // Input from the OS event queue is processed before HIGH_IDLE tasks.
    HIGH_IDLE,     
    RESIZE,        
    REPAINT,       
    POST_PAINT,    
    DEFAULT_IDLE,  
    LOWEST         
};
 
#define PRIO_COUNT (static_cast<int>(TaskPriority::LOWEST) + 1)
 
class VCL_DLLPUBLIC Task
{
    friend class Scheduler;
    friend struct ImplSchedulerData;
 
    ImplSchedulerData *mpSchedulerData; 
    const char        *mpDebugName;     
    TaskPriority       mePriority;      
    bool               mbActive;        
    bool               mbStatic;        
 
protected:
    static void StartTimer( sal_uInt64 nMS );
 
    const ImplSchedulerData* GetSchedulerData() const { return mpSchedulerData; }
 
    virtual void SetDeletionFlags();
 
    virtual sal_uInt64 UpdateMinPeriod( sal_uInt64 nTimeNow ) const = 0;
 
public:
    Task( const char *pDebugName );
    Task( const Task& rTask );
    virtual ~Task() COVERITY_NOEXCEPT_FALSE;
    Task& operator=( const Task& rTask );
 
    void            SetPriority(TaskPriority ePriority);
    TaskPriority    GetPriority() const { return mePriority; }
 
    const char     *GetDebugName() const { return mpDebugName; }
 
    // Call handler
    virtual void    Invoke() = 0;
 
    virtual void Start(bool bStartTimer = true);
    void            Stop();
 
    bool            IsActive() const { return mbActive; }
 
    void            SetStatic() { mbStatic = true; }
    bool            IsStatic() const { return mbStatic; }
};
 
#endif // INCLUDED_VCL_TASK_HXX
 
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */