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// 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.
#include "mojo/edk/system/data_pipe_consumer_dispatcher.h"
#include "base/logging.h"
#include "mojo/edk/system/data_pipe.h"
#include "mojo/edk/system/memory.h"
namespace mojo {
namespace system {
DataPipeConsumerDispatcher::DataPipeConsumerDispatcher() {
}
void DataPipeConsumerDispatcher::Init(scoped_refptr<DataPipe> data_pipe) {
DCHECK(data_pipe);
data_pipe_ = data_pipe;
}
Dispatcher::Type DataPipeConsumerDispatcher::GetType() const {
return kTypeDataPipeConsumer;
}
DataPipeConsumerDispatcher::~DataPipeConsumerDispatcher() {
// |Close()|/|CloseImplNoLock()| should have taken care of the pipe.
DCHECK(!data_pipe_);
}
void DataPipeConsumerDispatcher::CancelAllAwakablesNoLock() {
lock().AssertAcquired();
data_pipe_->ConsumerCancelAllAwakables();
}
void DataPipeConsumerDispatcher::CloseImplNoLock() {
lock().AssertAcquired();
data_pipe_->ConsumerClose();
data_pipe_ = nullptr;
}
scoped_refptr<Dispatcher>
DataPipeConsumerDispatcher::CreateEquivalentDispatcherAndCloseImplNoLock() {
lock().AssertAcquired();
scoped_refptr<DataPipeConsumerDispatcher> rv =
new DataPipeConsumerDispatcher();
rv->Init(data_pipe_);
data_pipe_ = nullptr;
return scoped_refptr<Dispatcher>(rv.get());
}
MojoResult DataPipeConsumerDispatcher::ReadDataImplNoLock(
UserPointer<void> elements,
UserPointer<uint32_t> num_bytes,
MojoReadDataFlags flags) {
lock().AssertAcquired();
if ((flags & MOJO_READ_DATA_FLAG_DISCARD)) {
// These flags are mutally exclusive.
if ((flags & MOJO_READ_DATA_FLAG_QUERY) ||
(flags & MOJO_READ_DATA_FLAG_PEEK))
return MOJO_RESULT_INVALID_ARGUMENT;
DVLOG_IF(2, !elements.IsNull())
<< "Discard mode: ignoring non-null |elements|";
return data_pipe_->ConsumerDiscardData(
num_bytes, (flags & MOJO_READ_DATA_FLAG_ALL_OR_NONE));
}
if ((flags & MOJO_READ_DATA_FLAG_QUERY)) {
if ((flags & MOJO_READ_DATA_FLAG_PEEK))
return MOJO_RESULT_INVALID_ARGUMENT;
DCHECK(!(flags & MOJO_READ_DATA_FLAG_DISCARD)); // Handled above.
DVLOG_IF(2, !elements.IsNull())
<< "Query mode: ignoring non-null |elements|";
return data_pipe_->ConsumerQueryData(num_bytes);
}
return data_pipe_->ConsumerReadData(
elements, num_bytes, !!(flags & MOJO_READ_DATA_FLAG_ALL_OR_NONE),
!!(flags & MOJO_READ_DATA_FLAG_PEEK));
}
MojoResult DataPipeConsumerDispatcher::BeginReadDataImplNoLock(
UserPointer<const void*> buffer,
UserPointer<uint32_t> buffer_num_bytes,
MojoReadDataFlags flags) {
lock().AssertAcquired();
// These flags may not be used in two-phase mode.
if ((flags & MOJO_READ_DATA_FLAG_DISCARD) ||
(flags & MOJO_READ_DATA_FLAG_QUERY) || (flags & MOJO_READ_DATA_FLAG_PEEK))
return MOJO_RESULT_INVALID_ARGUMENT;
return data_pipe_->ConsumerBeginReadData(
buffer, buffer_num_bytes, (flags & MOJO_READ_DATA_FLAG_ALL_OR_NONE));
}
MojoResult DataPipeConsumerDispatcher::EndReadDataImplNoLock(
uint32_t num_bytes_read) {
lock().AssertAcquired();
return data_pipe_->ConsumerEndReadData(num_bytes_read);
}
HandleSignalsState DataPipeConsumerDispatcher::GetHandleSignalsStateImplNoLock()
const {
lock().AssertAcquired();
return data_pipe_->ConsumerGetHandleSignalsState();
}
MojoResult DataPipeConsumerDispatcher::AddAwakableImplNoLock(
Awakable* awakable,
MojoHandleSignals signals,
uint32_t context,
HandleSignalsState* signals_state) {
lock().AssertAcquired();
return data_pipe_->ConsumerAddAwakable(awakable, signals, context,
signals_state);
}
void DataPipeConsumerDispatcher::RemoveAwakableImplNoLock(
Awakable* awakable,
HandleSignalsState* signals_state) {
lock().AssertAcquired();
data_pipe_->ConsumerRemoveAwakable(awakable, signals_state);
}
bool DataPipeConsumerDispatcher::IsBusyNoLock() const {
lock().AssertAcquired();
return data_pipe_->ConsumerIsBusy();
}
} // namespace system
} // namespace mojo
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