1 // Copyright 2013 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
5 #ifndef MOJO_SYSTEM_SIMPLE_DISPATCHER_H_
6 #define MOJO_SYSTEM_SIMPLE_DISPATCHER_H_
10 #include "base/macros.h"
11 #include "mojo/system/dispatcher.h"
12 #include "mojo/system/system_impl_export.h"
13 #include "mojo/system/waiter_list.h"
18 // A base class for simple dispatchers. "Simple" means that there's a one-to-one
19 // correspondence between handles and dispatchers (see the explanatory comment
20 // in core.cc). This class implements the standard waiter-signalling mechanism
22 class MOJO_SYSTEM_IMPL_EXPORT SimpleDispatcher : public Dispatcher {
25 virtual ~SimpleDispatcher();
27 // To be called by subclasses when the state changes (so
28 // |GetHandleSignalsStateImplNoLock()| should be checked again). Must be
30 void HandleSignalsStateChangedNoLock();
32 // |Dispatcher| protected methods:
33 virtual void CancelAllWaitersNoLock() OVERRIDE;
34 virtual MojoResult AddWaiterImplNoLock(
36 MojoHandleSignals signals,
38 HandleSignalsState* signals_state) OVERRIDE;
39 virtual void RemoveWaiterImplNoLock(
41 HandleSignalsState* signals_state) OVERRIDE;
44 // Protected by |lock()|:
45 WaiterList waiter_list_;
47 DISALLOW_COPY_AND_ASSIGN(SimpleDispatcher);
53 #endif // MOJO_SYSTEM_SIMPLE_DISPATCHER_H_