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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_SEMAPHORE_HPP)
#define OMNI_SEMAPHORE_HPP 1
#include <omni/defs/class_macros.hpp>
#include <omni/types/lock_t.hpp>
#if defined(OMNI_SAFE_SEMAPHORE)
#include <omni/sync/lock.hpp>
#endif
namespace omni {
namespace sync {
class semaphore
{
public:
semaphore();
explicit semaphore(unsigned long maxent);
explicit semaphore(unsigned long maxent, bool lock1st);
~semaphore(); // shouldn't inherit
const omni::sync::semaphore_t handle() const;
unsigned long locked() const;
unsigned long max_ent() const;
unsigned long open() const;
inline unsigned long release() { return this->release(1); }
unsigned long release(unsigned long count);
unsigned long release_all();
bool wait();
bool wait(unsigned long timeout_ms);
bool trywait();
// TODO: bool wait(omni::timespan &t); when omni::timespan complete
bool operator==(const omni::sync::semaphore& o) const;
bool operator!=(const omni::sync::semaphore& o) const;
OMNI_MEMBERS_FW(omni::sync::semaphore) // disposing,name,type(),hash()
private:
// defined but not implemented, shouldn't be copied
semaphore(const omni::sync::semaphore& cp); // = delete;
omni::sync::semaphore& operator=(const omni::sync::semaphore& other); // = delete;
// Functions
void _init(unsigned long maxent);
void _dispose();
// Members
#if defined(OMNI_TYPE_INFO)
omni::type<omni::sync::semaphore> m_type;
#endif
unsigned long m_cnt;
unsigned long m_max;
omni::sync::semaphore_t m_sem;
#if defined(OMNI_SAFE_SEMAPHORE)
mutable omni::sync::mutex_t m_mtx;
#endif
};
}
}
#endif // OMNI_SEMAPHORE_HPP