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// 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 Google Inc. nor the name Chromium Embedded

// Framework 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 THE COPYRIGHT HOLDERS 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 THE COPYRIGHT

// OWNER OR 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.

// ---------------------------------------------------------------------------

// The contents of this file must follow a specific format in order to

// support the CEF translator tool. See the translator.README.txt file in the

// tools directory for more information.

#ifndef CEF_INCLUDE_CEF_WAITABLE_EVENT_H_

#define CEF_INCLUDE_CEF_WAITABLE_EVENT_H_

#pragma once

#include "include/cef_base.h"

///

// WaitableEvent is a thread synchronization tool that allows one thread to wait

// for another thread to finish some work. This is equivalent to using a

// Lock+ConditionVariable to protect a simple boolean value. However, using

// WaitableEvent in conjunction with a Lock to wait for a more complex state

// change (e.g., for an item to be added to a queue) is not recommended. In that

// case consider using a ConditionVariable instead of a WaitableEvent. It is

// safe to create and/or signal a WaitableEvent from any thread. Blocking on a

// WaitableEvent by calling the *Wait() methods is not allowed on the browser

// process UI or IO threads.

///

/*--cef(source=library)--*/

class CefWaitableEvent : public CefBaseRefCounted {

public:

///

// Create a new waitable event. If |automatic_reset| is true then the event

// state is automatically reset to un-signaled after a single waiting thread

// has been released; otherwise, the state remains signaled until Reset() is

// called manually. If |initially_signaled| is true then the event will start

// in the signaled state.

///

/*--cef()--*/

static CefRefPtr<CefWaitableEvent> CreateWaitableEvent(

bool automatic_reset,

bool initially_signaled);

///

// Put the event in the un-signaled state.

///

/*--cef()--*/

virtual void Reset() = 0;

///

// Put the event in the signaled state. This causes any thread blocked on Wait

// to be woken up.

///

/*--cef()--*/

virtual void Signal() = 0;

///

// Returns true if the event is in the signaled state, else false. If the

// event was created with |automatic_reset| set to true then calling this

// method will also cause a reset.

///

/*--cef()--*/

virtual bool IsSignaled() = 0;

///

// Wait indefinitely for the event to be signaled. This method will not return

// until after the call to Signal() has completed. This method cannot be

// called on the browser process UI or IO threads.

///

/*--cef()--*/

virtual void Wait() = 0;

///

// Wait up to |max_ms| milliseconds for the event to be signaled. Returns true

// if the event was signaled. A return value of false does not necessarily

// mean that |max_ms| was exceeded. This method will not return until after

// the call to Signal() has completed. This method cannot be called on the

// browser process UI or IO threads.

///

/*--cef()--*/

virtual bool TimedWait(int64 max_ms) = 0;

};

#endif // CEF_INCLUDE_CEF_WAITABLE_EVENT_H_

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