Mutex.h

См. документацию.

/* This file is part of the UniSet project
 * Copyright (c) 2002 Free Software Foundation, Inc.
 * Copyright (c) 2002 Pavel Vainerman
 *
 * 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 UniSet_MUTEX_H_
#define UniSet_MUTEX_H_
// -----------------------------------------------------------------------------------------
#include <string>
#include <omnithread.h>
#include <signal.h>
// -----------------------------------------------------------------------------------------
namespace UniSetTypes
{
    typedef volatile sig_atomic_t mutex_atomic_t;
    // typedef _Atomic_word mutex_atomic_t;
    

    class uniset_mutex
    {
        public:
            uniset_mutex();
            uniset_mutex( std::string name );
            ~uniset_mutex();

            bool isRelease();
            void lock();
            void unlock();
            
            inline std::string name()
            {
                return nm;
            };
            
        protected:
        
        private:
            friend class uniset_mutex_lock;
            uniset_mutex (const uniset_mutex& r);
            const uniset_mutex &operator=(const uniset_mutex& r);
            omni_condition* cnd;
            std::string nm;
            omni_semaphore sem;
            omni_mutex mtx;
            mutex_atomic_t locked;
    };

    class uniset_mutex_lock
    {
        public:
            uniset_mutex_lock( uniset_mutex& m, int timeoutMS=0 );
            ~uniset_mutex_lock();
            
            bool lock_ok();

        private:
            uniset_mutex* mutex;
            mutex_atomic_t mlock;
            uniset_mutex_lock(const uniset_mutex_lock&);
            uniset_mutex_lock& operator=(const uniset_mutex_lock&);
    };

    // -------------------------------------------------------------------------
    class uniset_spin_mutex
    {
        public:
            uniset_spin_mutex();
            ~uniset_spin_mutex();

            void lock( int check_pause_msec=1 );
            void unlock();

            uniset_spin_mutex (const uniset_spin_mutex& r);
            const uniset_spin_mutex &operator=(const uniset_spin_mutex& r);

        private:
            friend class uniset_spin_lock;
            mutex_atomic_t m;
    };
    // -------------------------------------------------------------------------
    class uniset_spin_lock
    {
        public:
            uniset_spin_lock( uniset_spin_mutex& m, int check_pause_msec=1 );
            ~uniset_spin_lock();

        private:
            uniset_spin_lock(const uniset_spin_lock&);
            uniset_spin_lock& operator=(const uniset_spin_lock&);
            uniset_spin_mutex& m;
    };
    // -------------------------------------------------------------------------
} // end of UniSetTypes namespace

#endif