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/*
* This file is part of the Omni C++ framework
*
* Copyright (c) 2016, Zeriph Enterprises, LLC
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* - Neither the name of Zeriph, Zeriph Enterprises, LLC, nor the names
* of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY ZERIPH AND CONTRIBUTORS "AS IS" AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL ZERIPH AND CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#if !defined(OMNI_BASIC_LOCK_HPP)
#define OMNI_BASIC_LOCK_HPP 1
#include <omni/defs/class_macros.hpp>
#include <omni/sync/lock.hpp>
namespace omni {
namespace sync {
class basic_lock
{
public:
basic_lock() :
OMNI_CTOR_FW(omni::sync::basic_lock)
m_lokd(0), m_mtx()
{
omni::sync::mutex_init(this->m_mtx);
}
explicit basic_lock(bool initialy_owned) :
OMNI_CTOR_FW(omni::sync::basic_lock)
m_lokd(0), m_mtx()
{
omni::sync::mutex_init(this->m_mtx);
if (initialy_owned) { this->lock(); }
}
~basic_lock()
{
OMNI_DTOR_FW
if (this->locked()) {
OMNI_ERR_FW("system mutex is locked on destruction", omni::invalid_mutex_state())
}
omni::sync::mutex_destroy(this->m_mtx);
OMNI_D5_FW("destroyed");
}
const omni::sync::mutex_t handle() const
{
return this->m_mtx;
}
bool locked() const
{
return (this->m_lokd > 0);
}
void lock()
{
omni::sync::mutex_lock(this->m_mtx);
++this->m_lokd;
}
bool lock(std::size_t timeout_ms)
{
if (omni::sync::mutex_lock(this->m_mtx, timeout_ms)) {
++this->m_lokd;
return true;
}
return false;
}
void unlock()
{
omni::sync::mutex_unlock(this->m_mtx);
--this->m_lokd;
}
bool trylock()
{
if (omni::sync::mutex_trylock(this->m_mtx)) {
++this->m_lokd;
return true;
}
return false;
}
bool operator==(const omni::sync::basic_lock& o) const
{
if (this == &o) { return true; }
return this->m_lokd == o.m_lokd &&
&this->m_mtx == &o.m_mtx
OMNI_EQUAL_FW(o);
}
bool operator==(const omni::sync::mutex_t& o) const
{
return (&this->m_mtx == &o);
}
bool operator!=(const omni::sync::basic_lock& o) const
{
return !(*this == o);
}
bool operator!=(const omni::sync::mutex_t& o) const
{
return !(&this->m_mtx == &o);
}
OMNI_MEMBERS_FW(omni::sync::basic_lock) // disposing,name,type(),hash()
private:
// defined but not implemented, shouldn't be copied
basic_lock(const omni::sync::basic_lock &cp);
omni::sync::basic_lock& operator=(const omni::sync::basic_lock& other);
#if defined(OMNI_TYPE_INFO)
omni::type<omni::sync::basic_lock> m_type;
#endif
volatile std::size_t m_lokd;
omni::sync::mutex_t m_mtx;
};
}
}
#endif // OMNI_BASIC_LOCK_HPP