Thread.h

/*
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 *
 * Thread.h
 * A thread object.
 * Copyright (C) 2010 Simon Newton
 */

#ifndef INCLUDE_OLA_THREAD_THREAD_H_
#define INCLUDE_OLA_THREAD_THREAD_H_

#ifdef _WIN32
// On MinGW, pthread.h pulls in Windows.h, which in turn pollutes the global
// namespace. We define VC_EXTRALEAN and WIN32_LEAN_AND_MEAN to reduce this.
#define VC_EXTRALEAN
#define WIN32_LEAN_AND_MEAN
#endif
#include <pthread.h>
#include <ola/base/Macro.h>
#include <ola/thread/Mutex.h>

namespace ola {
namespace thread {

typedef pthread_t ThreadId;

class Thread {
 public:
    Thread(): m_thread_id(), m_running(false) {}
    virtual ~Thread() {}

    virtual bool Start();
    virtual bool FastStart();
    virtual bool Join(void *ptr = NULL);
    bool IsRunning();

    ThreadId Id() const { return m_thread_id; }

    // Called by pthread_create
    void *_InternalRun();

    static inline ThreadId Self() { return pthread_self(); }

 protected:
    // Sub classes implement this.
    virtual void *Run() = 0;

 private:
    pthread_t m_thread_id;
    bool m_running;
    Mutex m_mutex;  // protects m_running
    ConditionVariable m_condition;  // use to wait for the thread to start

    DISALLOW_COPY_AND_ASSIGN(Thread);
};
}  // namespace thread
}  // namespace ola
#endif  // INCLUDE_OLA_THREAD_THREAD_H_