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

//
// NamedEvent.h
//
// Library: Foundation
// Package: Processes
// Module:  NamedEvent
//
// Definition of the NamedEvent class.
//
// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// SPDX-License-Identifier:	BSL-1.0
//


#ifndef Foundation_NamedEvent_INCLUDED
#define Foundation_NamedEvent_INCLUDED


#include "Poco/Foundation.h"


#if   POCO_OS == POCO_OS_ANDROID
#    include "Poco/NamedEvent_Android.h"
#elif defined(POCO_OS_FAMILY_UNIX)
#    include "Poco/NamedEvent_UNIX.h"
#endif


namespace Poco
{


class Foundation_API NamedEvent : public NamedEventImpl
/// An NamedEvent is a global synchronization object
/// that allows one process or thread to signal an
/// other process or thread that a certain event
/// has happened.
///
/// Unlike an Event, which itself is the unit of synchronization,
/// a NamedEvent refers to a named operating system resource being the
/// unit of synchronization.
/// In other words, there can be multiple instances of NamedEvent referring
/// to the same actual synchronization object.
///
/// NamedEvents are always autoresetting.
///
/// There should not be more than one instance of NamedEvent for
/// a given name in a process. Otherwise, the instances may
/// interfere with each other.
{
public:
    NamedEvent(const std::string & name);
    /// Creates the event.

    ~NamedEvent();
    /// Destroys the event.

    void set();
    /// Signals the event.
    /// The one thread or process waiting for the event
    /// can resume execution.

    void wait();
    /// Waits for the event to become signalled.

private:
    NamedEvent();
    NamedEvent(const NamedEvent &);
    NamedEvent & operator=(const NamedEvent &);
};


//
// inlines
//
inline void NamedEvent::set()
{
    setImpl();
}


inline void NamedEvent::wait()
{
    waitImpl();
}


} // namespace Poco


#endif // Foundation_NamedEvent_INCLUDED