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 #include "mojo/edk/system/data_pipe_consumer_dispatcher.h"
7 #include "base/logging.h"
8 #include "mojo/edk/system/data_pipe.h"
9 #include "mojo/edk/system/memory.h"
14 DataPipeConsumerDispatcher::DataPipeConsumerDispatcher() {
17 void DataPipeConsumerDispatcher::Init(scoped_refptr<DataPipe> data_pipe) {
18 DCHECK(data_pipe.get());
19 data_pipe_ = data_pipe;
22 Dispatcher::Type DataPipeConsumerDispatcher::GetType() const {
23 return kTypeDataPipeConsumer;
26 DataPipeConsumerDispatcher::~DataPipeConsumerDispatcher() {
27 // |Close()|/|CloseImplNoLock()| should have taken care of the pipe.
28 DCHECK(!data_pipe_.get());
31 void DataPipeConsumerDispatcher::CancelAllWaitersNoLock() {
32 lock().AssertAcquired();
33 data_pipe_->ConsumerCancelAllWaiters();
36 void DataPipeConsumerDispatcher::CloseImplNoLock() {
37 lock().AssertAcquired();
38 data_pipe_->ConsumerClose();
42 scoped_refptr<Dispatcher>
43 DataPipeConsumerDispatcher::CreateEquivalentDispatcherAndCloseImplNoLock() {
44 lock().AssertAcquired();
46 scoped_refptr<DataPipeConsumerDispatcher> rv =
47 new DataPipeConsumerDispatcher();
50 return scoped_refptr<Dispatcher>(rv.get());
53 MojoResult DataPipeConsumerDispatcher::ReadDataImplNoLock(
54 UserPointer<void> elements,
55 UserPointer<uint32_t> num_bytes,
56 MojoReadDataFlags flags) {
57 lock().AssertAcquired();
59 if ((flags & MOJO_READ_DATA_FLAG_DISCARD)) {
60 // These flags are mutally exclusive.
61 if ((flags & MOJO_READ_DATA_FLAG_QUERY) ||
62 (flags & MOJO_READ_DATA_FLAG_PEEK))
63 return MOJO_RESULT_INVALID_ARGUMENT;
64 DVLOG_IF(2, !elements.IsNull())
65 << "Discard mode: ignoring non-null |elements|";
66 return data_pipe_->ConsumerDiscardData(
67 num_bytes, (flags & MOJO_READ_DATA_FLAG_ALL_OR_NONE));
70 if ((flags & MOJO_READ_DATA_FLAG_QUERY)) {
71 if ((flags & MOJO_READ_DATA_FLAG_PEEK))
72 return MOJO_RESULT_INVALID_ARGUMENT;
73 DCHECK(!(flags & MOJO_READ_DATA_FLAG_DISCARD)); // Handled above.
74 DVLOG_IF(2, !elements.IsNull())
75 << "Query mode: ignoring non-null |elements|";
76 return data_pipe_->ConsumerQueryData(num_bytes);
79 return data_pipe_->ConsumerReadData(
82 !!(flags & MOJO_READ_DATA_FLAG_ALL_OR_NONE),
83 !!(flags & MOJO_READ_DATA_FLAG_PEEK));
86 MojoResult DataPipeConsumerDispatcher::BeginReadDataImplNoLock(
87 UserPointer<const void*> buffer,
88 UserPointer<uint32_t> buffer_num_bytes,
89 MojoReadDataFlags flags) {
90 lock().AssertAcquired();
92 // These flags may not be used in two-phase mode.
93 if ((flags & MOJO_READ_DATA_FLAG_DISCARD) ||
94 (flags & MOJO_READ_DATA_FLAG_QUERY) ||
95 (flags & MOJO_READ_DATA_FLAG_PEEK))
96 return MOJO_RESULT_INVALID_ARGUMENT;
98 return data_pipe_->ConsumerBeginReadData(
99 buffer, buffer_num_bytes, (flags & MOJO_READ_DATA_FLAG_ALL_OR_NONE));
102 MojoResult DataPipeConsumerDispatcher::EndReadDataImplNoLock(
103 uint32_t num_bytes_read) {
104 lock().AssertAcquired();
106 return data_pipe_->ConsumerEndReadData(num_bytes_read);
109 HandleSignalsState DataPipeConsumerDispatcher::GetHandleSignalsStateImplNoLock()
111 lock().AssertAcquired();
112 return data_pipe_->ConsumerGetHandleSignalsState();
115 MojoResult DataPipeConsumerDispatcher::AddWaiterImplNoLock(
117 MojoHandleSignals signals,
119 HandleSignalsState* signals_state) {
120 lock().AssertAcquired();
121 return data_pipe_->ConsumerAddWaiter(waiter, signals, context, signals_state);
124 void DataPipeConsumerDispatcher::RemoveWaiterImplNoLock(
126 HandleSignalsState* signals_state) {
127 lock().AssertAcquired();
128 data_pipe_->ConsumerRemoveWaiter(waiter, signals_state);
131 bool DataPipeConsumerDispatcher::IsBusyNoLock() const {
132 lock().AssertAcquired();
133 return data_pipe_->ConsumerIsBusy();
136 } // namespace system