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_DATA_PIPE_CONSUMER_DISPATCHER_H_ 6 #define MOJO_SYSTEM_DATA_PIPE_CONSUMER_DISPATCHER_H_ 7 8 #include "base/basictypes.h" 9 #include "base/compiler_specific.h" 10 #include "base/memory/ref_counted.h" 11 #include "mojo/system/dispatcher.h" 12 #include "mojo/system/system_impl_export.h" 13 14 namespace mojo { 15 namespace system { 16 17 class DataPipe; 18 19 // This is the |Dispatcher| implementation for the consumer handle for data 20 // pipes (created by the Mojo primitive |MojoCreateDataPipe()|). This class is 21 // thread-safe. 22 class MOJO_SYSTEM_IMPL_EXPORT DataPipeConsumerDispatcher : public Dispatcher { 23 public: 24 DataPipeConsumerDispatcher(); 25 26 // Must be called before any other methods. 27 void Init(scoped_refptr<DataPipe> data_pipe); 28 29 // |Dispatcher| public methods: 30 virtual Type GetType() const OVERRIDE; 31 32 private: 33 virtual ~DataPipeConsumerDispatcher(); 34 35 // |Dispatcher| protected methods: 36 virtual void CancelAllWaitersNoLock() OVERRIDE; 37 virtual void CloseImplNoLock() OVERRIDE; 38 virtual scoped_refptr<Dispatcher> 39 CreateEquivalentDispatcherAndCloseImplNoLock() OVERRIDE; 40 virtual MojoResult ReadDataImplNoLock(void* elements, 41 uint32_t* num_bytes, 42 MojoReadDataFlags flags) OVERRIDE; 43 virtual MojoResult BeginReadDataImplNoLock(const void** buffer, 44 uint32_t* buffer_num_bytes, 45 MojoReadDataFlags flags) OVERRIDE; 46 virtual MojoResult EndReadDataImplNoLock(uint32_t num_bytes_read) OVERRIDE; 47 virtual MojoResult AddWaiterImplNoLock(Waiter* waiter, 48 MojoHandleSignals signals, 49 uint32_t context) OVERRIDE; 50 virtual void RemoveWaiterImplNoLock(Waiter* waiter) OVERRIDE; 51 virtual bool IsBusyNoLock() const OVERRIDE; 52 53 // Protected by |lock()|: 54 scoped_refptr<DataPipe> data_pipe_; // This will be null if closed. 55 56 DISALLOW_COPY_AND_ASSIGN(DataPipeConsumerDispatcher); 57 }; 58 59 } // namespace system 60 } // namespace mojo 61 62 #endif // MOJO_SYSTEM_DATA_PIPE_CONSUMER_DISPATCHER_H_ 63