| /*---------------------------------------------------------------------------*\ | |
| ========= | | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox | |
| \\ / O peration | Website: https://openfoam.org | |
| \\ / A nd | Copyright (C) 2011-2018 OpenFOAM Foundation | |
| \\/ M anipulation | | |
| ------------------------------------------------------------------------------- | |
| License | |
| This file is part of OpenFOAM. | |
| OpenFOAM is free software: you can redistribute it and/or modify it | |
| under the terms of the GNU General Public License as published by | |
| the Free Software Foundation, either version 3 of the License, or | |
| (at your option) any later version. | |
| OpenFOAM is distributed in the hope that it will be useful, but WITHOUT | |
| ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| for more details. | |
| You should have received a copy of the GNU General Public License | |
| along with OpenFOAM. If not, see <http://www.gnu.org/licenses/>. | |
| \*---------------------------------------------------------------------------*/ | |
| // * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * // | |
| namespace Foam | |
| { | |
| defineTypeNameAndDebug(timer, 0); | |
| jmp_buf timer::envAlarm; | |
| struct sigaction timer::oldAction_; | |
| unsigned int timer::oldTimeOut_ = 0; | |
| } | |
| // * * * * * * * * * * * * * Static Member Functions * * * * * * * * * * * * // | |
| void Foam::timer::signalHandler(int) | |
| { | |
| if (debug) | |
| { | |
| InfoInFunction<< "Timed out. Jumping." | |
| << endl; | |
| } | |
| longjmp(envAlarm, 1); | |
| } | |
| // * * * * * * * * * * * * * * * * Constructors * * * * * * * * * * * * * * // | |
| Foam::timer::timer(const unsigned int newTimeOut) | |
| : | |
| newTimeOut_(newTimeOut) | |
| { | |
| if (newTimeOut > 0) | |
| { | |
| // Is singleton since handler is static function | |
| if (oldTimeOut_ != 0) | |
| { | |
| FatalErrorInFunction | |
| << "timer already used." | |
| << abort(FatalError); | |
| } | |
| // Install alarm signal handler: | |
| // - do not block any signals while in it | |
| // - clear list of signals to mask | |
| struct sigaction newAction; | |
| newAction.sa_handler = timer::signalHandler; | |
| newAction.sa_flags = SA_NODEFER; | |
| sigemptyset(&newAction.sa_mask); | |
| if (sigaction(SIGALRM, &newAction, &oldAction_) < 0) | |
| { | |
| FatalErrorInFunction | |
| << "sigaction(SIGALRM) error" | |
| << abort(FatalError); | |
| } | |
| oldTimeOut_ = ::alarm(newTimeOut); | |
| if (debug) | |
| { | |
| InfoInFunction | |
| << "Installing timeout " << int(newTimeOut_) | |
| << " seconds" | |
| << " (overriding old timeout " << int(oldTimeOut_) | |
| << ")." << endl; | |
| } | |
| } | |
| } | |
| // * * * * * * * * * * * * * * * * Destructor * * * * * * * * * * * * * * * // | |
| Foam::timer::~timer() | |
| { | |
| if (newTimeOut_ > 0) | |
| { | |
| if (debug) | |
| { | |
| InfoInFunction | |
| << "timeOut=" << int(newTimeOut_) | |
| << " : resetting timeOut to " << int(oldTimeOut_) << endl; | |
| } | |
| // Reset timer | |
| ::alarm(oldTimeOut_); | |
| oldTimeOut_ = 0; | |
| // Restore signal handler | |
| if (sigaction(SIGALRM, &oldAction_, nullptr) < 0) | |
| { | |
| FatalErrorInFunction | |
| << "sigaction(SIGALRM) error" | |
| << abort(FatalError); | |
| } | |
| } | |
| } | |
| // ************************************************************************* // | |