// 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 #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