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Diffstat (limited to 'include/vcl/idle.hxx')
-rw-r--r-- | include/vcl/idle.hxx | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/include/vcl/idle.hxx b/include/vcl/idle.hxx new file mode 100644 index 0000000000..d5162efcb7 --- /dev/null +++ b/include/vcl/idle.hxx @@ -0,0 +1,70 @@ +/* -*- 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_IDLE_HXX +#define INCLUDED_VCL_IDLE_HXX + +#include <vcl/timer.hxx> + +/** + * An idle is a timer to be scheduled immediately. + * + * It's - more or less - just a convenience class. + * + * Note: Despite the name, the timer is not necessarily invoked when idle. + * Use an idle priority such as TaskPriority::DEFAULT_IDLE to actually + * invoke the timer only when idle. + */ +class VCL_DLLPUBLIC Idle : public Timer +{ +private: + // Delete all timeout specific functions, we don't want in an Idle + void SetTimeout( sal_uInt64 nTimeoutMs ) = delete; + sal_uInt64 GetTimeout() const = delete; + +protected: + virtual sal_uInt64 UpdateMinPeriod( sal_uInt64 nTimeNow ) const override; + + Idle( bool bAuto, const char *pDebugName ); + +public: + Idle( const char *pDebugName ); + + virtual void Start(bool bStartTimer = true) override; +}; + +/** + * An auto-idle is long running task processing small chunks of data, which + * is re-scheduled multiple times. + * + * Remember to stop the Idle when finished, as it would otherwise busy loop the CPU! + * + * It probably makes sense to re-implement ReadyForSchedule and UpdateMinPeriod, + * in case there is a quick check and it can otherwise sleep. + */ +class VCL_DLLPUBLIC AutoIdle : public Idle +{ +public: + AutoIdle( const char *pDebugName ); +}; + + +#endif // INCLUDED_VCL_IDLE_HXX + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |