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- // Copyright 2018 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 "components/cast_channel/mojo_data_pump.h"
- #include <utility>
- #include "base/bind.h"
- #include "base/memory/ptr_util.h"
- #include "net/base/completion_once_callback.h"
- #include "net/base/io_buffer.h"
- #include "net/base/net_errors.h"
- namespace cast_channel {
- MojoDataPump::MojoDataPump(mojo::ScopedDataPipeConsumerHandle receive_stream,
- mojo::ScopedDataPipeProducerHandle send_stream)
- : receive_stream_(std::move(receive_stream)),
- receive_stream_watcher_(FROM_HERE,
- mojo::SimpleWatcher::ArmingPolicy::MANUAL),
- send_stream_(std::move(send_stream)),
- send_stream_watcher_(FROM_HERE,
- mojo::SimpleWatcher::ArmingPolicy::MANUAL) {
- DCHECK(receive_stream_.is_valid());
- DCHECK(send_stream_.is_valid());
- receive_stream_watcher_.Watch(
- receive_stream_.get(),
- MOJO_HANDLE_SIGNAL_READABLE | MOJO_HANDLE_SIGNAL_PEER_CLOSED,
- MOJO_TRIGGER_CONDITION_SIGNALS_SATISFIED,
- base::BindRepeating(&MojoDataPump::ReceiveMore, base::Unretained(this)));
- send_stream_watcher_.Watch(
- send_stream_.get(),
- MOJO_HANDLE_SIGNAL_WRITABLE | MOJO_HANDLE_SIGNAL_PEER_CLOSED,
- MOJO_TRIGGER_CONDITION_SIGNALS_SATISFIED,
- base::BindRepeating(&MojoDataPump::SendMore, base::Unretained(this)));
- }
- MojoDataPump::~MojoDataPump() {}
- void MojoDataPump::Read(net::IOBuffer* io_buffer,
- int count,
- net::CompletionOnceCallback callback) {
- DCHECK(callback);
- DCHECK(!read_callback_);
- if (count <= 0) {
- std::move(callback).Run(net::ERR_INVALID_ARGUMENT);
- return;
- }
- pending_read_buffer_ = io_buffer;
- read_size_ = count;
- read_callback_ = std::move(callback);
- receive_stream_watcher_.ArmOrNotify();
- }
- void MojoDataPump::Write(net::IOBuffer* io_buffer,
- int io_buffer_size,
- net::CompletionOnceCallback callback) {
- DCHECK(callback);
- DCHECK(!write_callback_);
- write_callback_ = std::move(callback);
- pending_write_buffer_ = io_buffer;
- pending_write_buffer_size_ = io_buffer_size;
- send_stream_watcher_.ArmOrNotify();
- }
- void MojoDataPump::ReceiveMore(MojoResult result,
- const mojo::HandleSignalsState& state) {
- DCHECK(read_callback_);
- DCHECK_NE(0u, read_size_);
- uint32_t num_bytes = read_size_;
- if (result == MOJO_RESULT_OK) {
- result = receive_stream_->ReadData(pending_read_buffer_->data(), &num_bytes,
- MOJO_READ_DATA_FLAG_NONE);
- }
- if (result == MOJO_RESULT_SHOULD_WAIT) {
- receive_stream_watcher_.ArmOrNotify();
- return;
- }
- read_size_ = 0;
- if (result != MOJO_RESULT_OK) {
- std::move(read_callback_).Run(net::ERR_FAILED);
- return;
- }
- std::move(read_callback_).Run(num_bytes);
- }
- void MojoDataPump::SendMore(MojoResult result,
- const mojo::HandleSignalsState& state) {
- DCHECK(write_callback_);
- uint32_t num_bytes = pending_write_buffer_size_;
- if (result == MOJO_RESULT_OK) {
- result = send_stream_->WriteData(pending_write_buffer_->data(), &num_bytes,
- MOJO_WRITE_DATA_FLAG_NONE);
- }
- if (result == MOJO_RESULT_SHOULD_WAIT) {
- send_stream_watcher_.ArmOrNotify();
- return;
- }
- pending_write_buffer_ = nullptr;
- pending_write_buffer_size_ = 0;
- if (result != MOJO_RESULT_OK) {
- std::move(write_callback_).Run(net::ERR_FAILED);
- return;
- }
- std::move(write_callback_).Run(num_bytes);
- }
- } // namespace cast_channel
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