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// Copyright 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef MOJO_SYSTEM_SIMPLE_DISPATCHER_H_
#define MOJO_SYSTEM_SIMPLE_DISPATCHER_H_
#include <list>
#include "base/macros.h"
#include "mojo/system/dispatcher.h"
#include "mojo/system/system_impl_export.h"
#include "mojo/system/waiter_list.h"
namespace mojo {
namespace system {
// A base class for simple dispatchers. "Simple" means that there's a one-to-one
// correspondence between handles and dispatchers (see the explanatory comment
// in core.cc). This class implements the standard waiter-signalling mechanism
// in that case.
class MOJO_SYSTEM_IMPL_EXPORT SimpleDispatcher : public Dispatcher {
protected:
SimpleDispatcher();
virtual ~SimpleDispatcher();
// To be called by subclasses when the state changes (so
// |GetHandleSignalsStateImplNoLock()| should be checked again). Must be
// called under lock.
void HandleSignalsStateChangedNoLock();
// |Dispatcher| protected methods:
virtual void CancelAllWaitersNoLock() OVERRIDE;
virtual MojoResult AddWaiterImplNoLock(
Waiter* waiter,
MojoHandleSignals signals,
uint32_t context,
HandleSignalsState* signals_state) OVERRIDE;
virtual void RemoveWaiterImplNoLock(
Waiter* waiter,
HandleSignalsState* signals_state) OVERRIDE;
private:
// Protected by |lock()|:
WaiterList waiter_list_;
DISALLOW_COPY_AND_ASSIGN(SimpleDispatcher);
};
} // namespace system
} // namespace mojo
#endif // MOJO_SYSTEM_SIMPLE_DISPATCHER_H_
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