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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 #include "mojo/system/data_pipe_producer_dispatcher.h"
6 
7 #include "base/logging.h"
8 #include "mojo/system/data_pipe.h"
9 #include "mojo/system/memory.h"
10 
11 namespace mojo {
12 namespace system {
13 
DataPipeProducerDispatcher()14 DataPipeProducerDispatcher::DataPipeProducerDispatcher() {
15 }
16 
Init(scoped_refptr<DataPipe> data_pipe)17 void DataPipeProducerDispatcher::Init(scoped_refptr<DataPipe> data_pipe) {
18   DCHECK(data_pipe.get());
19   data_pipe_ = data_pipe;
20 }
21 
GetType() const22 Dispatcher::Type DataPipeProducerDispatcher::GetType() const {
23   return kTypeDataPipeProducer;
24 }
25 
~DataPipeProducerDispatcher()26 DataPipeProducerDispatcher::~DataPipeProducerDispatcher() {
27   // |Close()|/|CloseImplNoLock()| should have taken care of the pipe.
28   DCHECK(!data_pipe_.get());
29 }
30 
CancelAllWaitersNoLock()31 void DataPipeProducerDispatcher::CancelAllWaitersNoLock() {
32   lock().AssertAcquired();
33   data_pipe_->ProducerCancelAllWaiters();
34 }
35 
CloseImplNoLock()36 void DataPipeProducerDispatcher::CloseImplNoLock() {
37   lock().AssertAcquired();
38   data_pipe_->ProducerClose();
39   data_pipe_ = nullptr;
40 }
41 
42 scoped_refptr<Dispatcher>
CreateEquivalentDispatcherAndCloseImplNoLock()43 DataPipeProducerDispatcher::CreateEquivalentDispatcherAndCloseImplNoLock() {
44   lock().AssertAcquired();
45 
46   scoped_refptr<DataPipeProducerDispatcher> rv =
47       new DataPipeProducerDispatcher();
48   rv->Init(data_pipe_);
49   data_pipe_ = nullptr;
50   return scoped_refptr<Dispatcher>(rv.get());
51 }
52 
WriteDataImplNoLock(UserPointer<const void> elements,UserPointer<uint32_t> num_bytes,MojoWriteDataFlags flags)53 MojoResult DataPipeProducerDispatcher::WriteDataImplNoLock(
54     UserPointer<const void> elements,
55     UserPointer<uint32_t> num_bytes,
56     MojoWriteDataFlags flags) {
57   lock().AssertAcquired();
58   return data_pipe_->ProducerWriteData(
59       elements, num_bytes, (flags & MOJO_WRITE_DATA_FLAG_ALL_OR_NONE));
60 }
61 
BeginWriteDataImplNoLock(UserPointer<void * > buffer,UserPointer<uint32_t> buffer_num_bytes,MojoWriteDataFlags flags)62 MojoResult DataPipeProducerDispatcher::BeginWriteDataImplNoLock(
63     UserPointer<void*> buffer,
64     UserPointer<uint32_t> buffer_num_bytes,
65     MojoWriteDataFlags flags) {
66   lock().AssertAcquired();
67 
68   return data_pipe_->ProducerBeginWriteData(
69       buffer, buffer_num_bytes, (flags & MOJO_WRITE_DATA_FLAG_ALL_OR_NONE));
70 }
71 
EndWriteDataImplNoLock(uint32_t num_bytes_written)72 MojoResult DataPipeProducerDispatcher::EndWriteDataImplNoLock(
73     uint32_t num_bytes_written) {
74   lock().AssertAcquired();
75 
76   return data_pipe_->ProducerEndWriteData(num_bytes_written);
77 }
78 
GetHandleSignalsStateImplNoLock() const79 HandleSignalsState DataPipeProducerDispatcher::GetHandleSignalsStateImplNoLock()
80     const {
81   lock().AssertAcquired();
82   return data_pipe_->ProducerGetHandleSignalsState();
83 }
84 
AddWaiterImplNoLock(Waiter * waiter,MojoHandleSignals signals,uint32_t context,HandleSignalsState * signals_state)85 MojoResult DataPipeProducerDispatcher::AddWaiterImplNoLock(
86     Waiter* waiter,
87     MojoHandleSignals signals,
88     uint32_t context,
89     HandleSignalsState* signals_state) {
90   lock().AssertAcquired();
91   return data_pipe_->ProducerAddWaiter(waiter, signals, context, signals_state);
92 }
93 
RemoveWaiterImplNoLock(Waiter * waiter,HandleSignalsState * signals_state)94 void DataPipeProducerDispatcher::RemoveWaiterImplNoLock(
95     Waiter* waiter,
96     HandleSignalsState* signals_state) {
97   lock().AssertAcquired();
98   data_pipe_->ProducerRemoveWaiter(waiter, signals_state);
99 }
100 
IsBusyNoLock() const101 bool DataPipeProducerDispatcher::IsBusyNoLock() const {
102   lock().AssertAcquired();
103   return data_pipe_->ProducerIsBusy();
104 }
105 
106 }  // namespace system
107 }  // namespace mojo
108