File: nthread.cpp

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/**************************************************************************
 *                                                                        *
 *  Regina - A Normal Surface Theory Calculator                           *
 *  Computational Engine                                                  *
 *                                                                        *
 *  Copyright (c) 1999-2008, Ben Burton                                   *
 *  For further details contact Ben Burton (bab@debian.org).              *
 *                                                                        *
 *  This program 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 2 of the    *
 *  License, or (at your option) any later version.                       *
 *                                                                        *
 *  This program 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 this program; if not, write to the Free            *
 *  Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,       *
 *  MA 02110-1301, USA.                                                   *
 *                                                                        *
 **************************************************************************/

/* end stub */

#include "utilities/nthread.h"

namespace regina {

namespace {
    struct NThreadRuntimeArgs {
        NThread* thread;
        void* args;
        bool deleteAfterwards;

        NThreadRuntimeArgs(NThread* newThread, void* newArgs,
                bool newDeleteAfterwards) : thread(newThread), args(newArgs),
                deleteAfterwards(newDeleteAfterwards) {
        }
    };

    void* NThreadRuntime(void* runtimeArgs) {
        // Get the arguments.
        NThread* thread =
            static_cast<NThreadRuntimeArgs*>(runtimeArgs)->thread;
        void* args = static_cast<NThreadRuntimeArgs*>(runtimeArgs)->args;
        bool deleteAfterwards =
            static_cast<NThreadRuntimeArgs*>(runtimeArgs)->deleteAfterwards;
        delete static_cast<NThreadRuntimeArgs*>(runtimeArgs);

        // Do the work.
        void* ans = thread->run(args);
        if (deleteAfterwards)
            delete thread;
        return ans;
    }
}

bool NThread::start(void* args, bool deleteAfterwards) {
    NThreadID tmpID;
    return (pthread_create(&tmpID, 0, NThreadRuntime,
        new NThreadRuntimeArgs(this, args, deleteAfterwards)) == 0);
}

bool NThread::start(void* (*routine)(void*), void* args, NThreadID* id) {
    if (id)
        return (pthread_create(id, 0, routine, args) == 0);
    else {
        NThreadID tmpID;
        return (pthread_create(&tmpID, 0, routine, args) == 0);
    }
}

} // namespace regina