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. 4 5 #ifndef MOJO_SYSTEM_SIMPLE_DISPATCHER_H_ 6 #define MOJO_SYSTEM_SIMPLE_DISPATCHER_H_ 7 8 #include <list> 9 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" 14 15 namespace mojo { 16 namespace system { 17 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 21 // in that case. 22 class MOJO_SYSTEM_IMPL_EXPORT SimpleDispatcher : public Dispatcher { 23 protected: 24 SimpleDispatcher(); 25 virtual ~SimpleDispatcher(); 26 27 // To be called by subclasses when the state changes (so 28 // |GetHandleSignalsStateImplNoLock()| should be checked again). Must be 29 // called under lock. 30 void HandleSignalsStateChangedNoLock(); 31 32 // |Dispatcher| protected methods: 33 virtual void CancelAllWaitersNoLock() OVERRIDE; 34 virtual MojoResult AddWaiterImplNoLock( 35 Waiter* waiter, 36 MojoHandleSignals signals, 37 uint32_t context, 38 HandleSignalsState* signals_state) OVERRIDE; 39 virtual void RemoveWaiterImplNoLock( 40 Waiter* waiter, 41 HandleSignalsState* signals_state) OVERRIDE; 42 43 private: 44 // Protected by |lock()|: 45 WaiterList waiter_list_; 46 47 DISALLOW_COPY_AND_ASSIGN(SimpleDispatcher); 48 }; 49 50 } // namespace system 51 } // namespace mojo 52 53 #endif // MOJO_SYSTEM_SIMPLE_DISPATCHER_H_ 54
