140 lines
4 KiB
C
140 lines
4 KiB
C
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/*---------------------------------------------------------------------------*\
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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 held by original author
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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 the
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Free Software Foundation; either version 2 of the License, or (at your
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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, write to the Free Software Foundation,
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Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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Description
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\*---------------------------------------------------------------------------*/
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#include <unistd.h>
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#include "error.H"
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#include "timer.H"
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// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
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defineTypeNameAndDebug(Foam::timer, 0);
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jmp_buf Foam::timer::envAlarm;
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struct sigaction Foam::timer::oldAction_;
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unsigned int Foam::timer::oldTimeOut_ = 0;
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// * * * * * * * * * * * * * Static Member Functions * * * * * * * * * * * * //
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void Foam::timer::signalHandler(int)
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{
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if (debug)
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{
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Info<< "Foam::timer::signalHandler(int sig) : "
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<< " timed out. Jumping."
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<< endl;
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}
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longjmp(envAlarm, 1);
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}
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// * * * * * * * * * * * * * * * * Constructors * * * * * * * * * * * * * * //
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// Construct from components
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Foam::timer::timer(const unsigned int newTimeOut)
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:
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newTimeOut_(newTimeOut)
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{
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if (newTimeOut > 0)
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{
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// Is singleton since handler is static function
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if (oldTimeOut_ != 0)
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{
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FatalErrorIn
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(
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"Foam::timer::timer(const unsigned int)"
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) << "timer already used."
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<< abort(FatalError);
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}
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// Install alarm signal handler:
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// - do not block any signals while in it
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// - clear list of signals to mask
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struct sigaction newAction;
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newAction.sa_handler = timer::signalHandler;
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newAction.sa_flags = SA_NODEFER;
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sigemptyset(&newAction.sa_mask);
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if (sigaction(SIGALRM, &newAction, &oldAction_) < 0)
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{
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FatalErrorIn
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(
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"Foam::timer::timer(const unsigned int)"
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) << "sigaction(SIGALRM) error"
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<< abort(FatalError);
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}
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oldTimeOut_ = ::alarm(newTimeOut);
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if (debug)
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{
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Info<< "Foam::timer::timer(const unsigned int) : "
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<< " installing timeout " << int(newTimeOut_)
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<< " seconds"
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<< " (overriding old timeout " << int(oldTimeOut_)
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<< ")." << endl;
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}
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}
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}
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// * * * * * * * * * * * * * * * * Destructor * * * * * * * * * * * * * * * //
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Foam::timer::~timer()
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{
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if (newTimeOut_ > 0)
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{
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if (debug)
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{
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Info<< "Foam::timer::~timer(const unsigned int) : timeOut="
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<< int(newTimeOut_)
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<< " : resetting timeOut to " << int(oldTimeOut_) << endl;
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}
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// Reset timer
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::alarm(oldTimeOut_);
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oldTimeOut_ = 0;
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// Restore signal handler
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if (sigaction(SIGALRM, &oldAction_, NULL) < 0)
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{
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FatalErrorIn
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(
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"Foam::timer::~timer(const struct sigaction&"
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"const struct sigaction&)"
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) << "sigaction(SIGALRM) error"
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<< abort(FatalError);
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}
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}
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}
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// ************************************************************************* //
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