| // 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_ |