coroutine_decls.h

/*
 *  Copyright (C) 2006  Helmut Grohne
 *
 *  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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#ifndef LIBMUTH_COROUTINE_DECLS_H
#define LIBMUTH_COROUTINE_DECLS_H

#ifndef __WIN32__
#include <ucontext.h>
#else
#include "win32.h"
#endif
#include "lock.h"
#include "refcounter_decls.h"

class NewCoroutine;

class Coroutine {
        private:
                Lock running;
                Coroutine *from;
                bool returned;
                int swapcontext(Coroutine&);
                int setcontext();
                void cleanupfrom();
        protected:
                ucontext_t context;
                virtual void destroyme();
        public:
                Coroutine();
                virtual ~Coroutine();
                void acquire();
                void swapto(Coroutine &o, bool acquired=false);
                friend class NewCoroutine;
};

class NewCoroutine : public Coroutine, public RefCounter {
        private:
                virtual void destroyme();
                static void boot();
#ifdef USE_VALGRIND
                int valgrind_stackid;
#endif
        public:
                NewCoroutine(int stacksize=4096*1024);
                ~NewCoroutine();
                void returnto(Coroutine &o, bool acquired=false);
                virtual void start()=0;
};

#endif

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