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/*
* Copyright (c), Zeriph Enterprises
* All rights reserved.
*
* Contributor(s):
* Zechariah Perez, omni (at) zeriph (dot) com
*
* 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>
#include <omni/chrono/span.hpp>
#if defined(OMNI_SAFE_SEMAPHORE)
#include <omni/sync/lock.hpp>
#endif
namespace omni {
namespace sync {
class semaphore
{
public:
semaphore();
OMNI_EXPLICIT semaphore(uint32_t maxent);
semaphore(uint32_t maxent, bool lock1st);
~semaphore(); // should not inherit
omni::sync::semaphore_t handle() const;
uint32_t locked() const;
uint32_t max_ent() const;
uint32_t open() const;
inline uint32_t release() { return this->release(1); }
uint32_t release(uint32_t count);
uint32_t release_all();
bool wait();
bool wait(uint32_t timeout_ms);
bool wait(const omni::chrono::unsigned_span_t& span);
bool trywait();
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:
uint32_t m_cnt;
uint32_t m_max;
omni::sync::semaphore_t m_sem;
#if defined(OMNI_SAFE_SEMAPHORE)
mutable omni::sync::mutex_t m_mtx;
#endif
// defined but not implemented, should not be copied
semaphore(const omni::sync::semaphore& cp); // = delete;
omni::sync::semaphore& operator=(const omni::sync::semaphore& other); // = delete;
void _init(uint32_t maxent);
void _dispose();
};
}
}
#endif // OMNI_SEMAPHORE_HPP