linux-sgx-trts-modified/common/inc/internal/se_lock.hpp

/*
 * Copyright (C) 2011-2018 Intel Corporation. All rights reserved.
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 * modification, are permitted provided that the following conditions
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 *   * Redistributions in binary form must reproduce the above copyright
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 *     distribution.
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 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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 */

/* This file implement lock guard */

#ifndef SE_LOCK_HPP
#define SE_LOCK_HPP

#include "util.h"
#include "se_thread.h"
#include "uncopyable.h"

class Mutex: private Uncopyable
{
public:
    Mutex(){se_mutex_init(&m_mutex);}
    ~Mutex(){se_mutex_destroy(&m_mutex);}
    void lock(){se_mutex_lock(&m_mutex);}
    void unlock(){se_mutex_unlock(&m_mutex);}
private:
    se_mutex_t m_mutex;
};

class Cond: private Uncopyable
{
public:
    Cond(){se_mutex_init(&m_mutex); se_thread_cond_init(&m_cond);}
    ~Cond(){se_mutex_destroy(&m_mutex); se_thread_cond_destroy(&m_cond);}
    void lock(){se_mutex_lock(&m_mutex);}
    void unlock(){se_mutex_unlock(&m_mutex);}
    void wait(){se_thread_cond_wait(&m_cond, &m_mutex);}
    void signal(){se_thread_cond_signal(&m_cond);}
    void broadcast(){se_thread_cond_broadcast(&m_cond);}
private:
    se_mutex_t m_mutex;
    se_cond_t  m_cond;
};

class LockGuard: private Uncopyable
{
public:
    LockGuard(Mutex* mutex):m_mutex(mutex){m_mutex->lock();}
    ~LockGuard(){m_mutex->unlock();}
private:
    Mutex* m_mutex;
};

#endif