sigWriteNow.H

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License
    This file is part of OpenFOAM.
 
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Class
    Foam::sigWriteNow
 
Description
    Signal handler to write when the writeNowSignal is sent.
 
    writeNowSignal is set in etc/controlDict::OptimisationSwitches, e.g.
    \verbatim
    OptimisationSwitches
    {
        .
        .
        // Force dumping (at next timestep) upon signal (-1 to disable)
        writeNowSignal              10; // SIGUSR1
        .
        .
    }
    \endverbatim
 
SourceFiles
    sigWriteNow.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef sigWriteNow_H
#define sigWriteNow_H
 
#include <signal.h>
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
class Time;
 
/*---------------------------------------------------------------------------*\
                         Class sigWriteNow Declaration
\*---------------------------------------------------------------------------*/
 
class sigWriteNow
{
    // Private Data
 
        //- Number of signal to use
        static int signal_;
 
        //- Pointer to Time
        static Time* runTimePtr_;
 
        //- Saved old signal trapping setting
        static struct sigaction oldAction_;
 
 
    // Private Member Functions
 
        static void sigHandler(int);
 
 
public:
 
    friend class sigStopAtWriteNow;
 
    //- wip. Have setter have access to signal_
    friend class addwriteNowSignalToOpt;
 
    // Constructors
 
        //- Construct null
        sigWriteNow();
 
        //- Construct from components
        sigWriteNow(const bool verbose, Time& runTime);
 
 
    //- Destructor
    ~sigWriteNow();
 
 
    // Member Functions
 
        //- (re)set signal catcher
        static void set(const bool verbose);
 
        //- Is active?
        bool active() const;
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //