ClickHouse/base/poco/Foundation/include/Poco/Event_POSIX.h

//
// Event_POSIX.h
//
// Library: Foundation
// Package: Threading
// Module:  Event
//
// Definition of the EventImpl class for POSIX Threads.
//
// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// SPDX-License-Identifier:	BSL-1.0
//


#ifndef Foundation_Event_POSIX_INCLUDED
#define Foundation_Event_POSIX_INCLUDED


#include <errno.h>
#include <pthread.h>
#include "Poco/Exception.h"
#include "Poco/Foundation.h"


namespace Poco
{


class Foundation_API EventImpl
{
protected:
    EventImpl(bool autoReset);
    ~EventImpl();
    void setImpl();
    void waitImpl();
    bool waitImpl(long milliseconds);
    void resetImpl();

private:
    bool _auto;
    volatile bool _state;
    pthread_mutex_t _mutex;
    pthread_cond_t _cond;
};


//
// inlines
//
inline void EventImpl::setImpl()
{
    if (pthread_mutex_lock(&_mutex))
        throw SystemException("cannot signal event (lock)");
    _state = true;
    if (pthread_cond_broadcast(&_cond))
    {
        pthread_mutex_unlock(&_mutex);
        throw SystemException("cannot signal event");
    }
    pthread_mutex_unlock(&_mutex);
}


inline void EventImpl::resetImpl()
{
    if (pthread_mutex_lock(&_mutex))
        throw SystemException("cannot reset event");
    _state = false;
    pthread_mutex_unlock(&_mutex);
}


} // namespace Poco


#endif // Foundation_Event_POSIX_INCLUDED