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https://develop.openfoam.com/Development/openfoam.git
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163 lines
4.3 KiB
C++
163 lines
4.3 KiB
C++
/*---------------------------------------------------------------------------*\
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========= |
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\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
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\\ / O peration |
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\\ / A nd | Copyright (C) 2011-2015 OpenFOAM Foundation
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\\/ M anipulation |
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-------------------------------------------------------------------------------
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License
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This file is part of OpenFOAM.
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OpenFOAM is free software: you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with OpenFOAM. If not, see <http://www.gnu.org/licenses/>.
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Class
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Foam::fileMonitor
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Description
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Checking for changes to files.
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Note
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The default is to use stat to get the timestamp.
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Compile with FOAM_USE_INOTIFY to use the inotify
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(Linux specific, since 2.6.13) framework. The problem is that inotify does
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not work on nfs3 mounted directories!!
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SourceFiles
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fileMonitor.C
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\*---------------------------------------------------------------------------*/
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#ifndef fileMonitor_H
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#define fileMonitor_H
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#include <sys/types.h>
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#include "NamedEnum.H"
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#include "className.H"
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#include "DynamicList.H"
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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namespace Foam
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{
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class fileMonitor;
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class fileMonitorWatcher;
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/*---------------------------------------------------------------------------*\
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Class fileMonitor Declaration
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\*---------------------------------------------------------------------------*/
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class fileMonitor
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{
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public:
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// Public data types
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//- Enumeration defining the file state.
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enum fileState
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{
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UNMODIFIED = 0,
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MODIFIED = 1,
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DELETED = 2
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};
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static const NamedEnum<fileState, 3> fileStateNames_;
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private:
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// Private data
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//- Whether to use inotify (requires -DFOAM_USE_INOTIFY, see above)
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const bool useInotify_;
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//- State for all watchFds based on local files
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mutable DynamicList<fileState> localState_;
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//- State for all watchFds - synchronised
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mutable DynamicList<fileState> state_;
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//- Filename for all watchFds
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DynamicList<fileName> watchFile_;
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//- Free watchFds
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DynamicList<label> freeWatchFds_;
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//- Watch mechanism (stat or inotify)
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mutable autoPtr<fileMonitorWatcher> watcher_;
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// Private Member Functions
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//- Update localState_ from any events.
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void checkFiles() const;
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//- Disallow default bitwise copy construct
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fileMonitor(const fileMonitor&);
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//- Disallow default bitwise assignment
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void operator=(const fileMonitor&);
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public:
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// Declare name of the class and its debug switch
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ClassName("fileMonitor");
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// Constructors
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//- Construct null
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fileMonitor(const bool useInotify);
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//- Destructor
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~fileMonitor();
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// Member Functions
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//- Add file to watch. Return watch descriptor
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label addWatch(const fileName&);
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//- Remove file to watch. Return true if successful
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bool removeWatch(const label watchFd);
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//- Get name of file being watched
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const fileName& getFile(const label watchFd) const;
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//- Check state using handle
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fileState getState(const label watchFd) const;
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//- Check state of all files. Updates state_.
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void updateStates
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(
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const bool masterOnly,
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const bool syncPar
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) const;
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//- Reset state (e.g. after having read it) using handle
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void setUnmodified(const label watchFd);
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};
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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} // End namespace Foam
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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#endif
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// ************************************************************************* //
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