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// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "services/network/shared_dictionary/shared_dictionary_data_pipe_writer.h"
#include "base/containers/span.h"
#include "base/memory/ptr_util.h"
#include "net/base/net_errors.h"
#include "services/network/public/cpp/loading_params.h"
#include "services/network/shared_dictionary/shared_dictionary_writer.h"
namespace network {
// static
uint32_t SharedDictionaryDataPipeWriter::GetDataPipeBufferSize() {
return GetDataPipeDefaultAllocationSize(
DataPipeAllocationSize::kLargerSizeIfPossible);
}
// static
std::unique_ptr<SharedDictionaryDataPipeWriter>
SharedDictionaryDataPipeWriter::Create(
mojo::ScopedDataPipeConsumerHandle& body,
scoped_refptr<SharedDictionaryWriter> writer,
base::OnceCallback<void(bool)> finish_callback) {
MojoCreateDataPipeOptions options;
options.struct_size = sizeof(MojoCreateDataPipeOptions);
options.flags = MOJO_CREATE_DATA_PIPE_FLAG_NONE;
options.element_num_bytes = 1;
options.capacity_num_bytes = GetDataPipeBufferSize();
mojo::ScopedDataPipeProducerHandle producer_handle;
mojo::ScopedDataPipeConsumerHandle consumer_handle;
MojoResult result =
mojo::CreateDataPipe(&options, producer_handle, consumer_handle);
if (result != MOJO_RESULT_OK) {
return nullptr;
}
auto data_pipe_writer = base::WrapUnique(new SharedDictionaryDataPipeWriter(
std::move(body), std::move(producer_handle), std::move(writer),
std::move(finish_callback)));
body = std::move(consumer_handle);
return data_pipe_writer;
}
SharedDictionaryDataPipeWriter::SharedDictionaryDataPipeWriter(
mojo::ScopedDataPipeConsumerHandle consumer_handle,
mojo::ScopedDataPipeProducerHandle producer_handle,
scoped_refptr<SharedDictionaryWriter> writer,
base::OnceCallback<void(bool)> finish_callback)
: consumer_handle_(std::move(consumer_handle)),
producer_handle_(std::move(producer_handle)),
writer_(std::move(writer)),
consumer_watcher_(FROM_HERE, mojo::SimpleWatcher::ArmingPolicy::MANUAL),
producer_writable_watcher_(FROM_HERE,
mojo::SimpleWatcher::ArmingPolicy::MANUAL),
producer_closed_watcher_(FROM_HERE,
mojo::SimpleWatcher::ArmingPolicy::MANUAL),
finish_callback_(std::move(finish_callback)) {
consumer_watcher_.Watch(
consumer_handle_.get(),
MOJO_HANDLE_SIGNAL_READABLE | MOJO_HANDLE_SIGNAL_PEER_CLOSED,
MOJO_TRIGGER_CONDITION_SIGNALS_SATISFIED,
base::BindRepeating(&SharedDictionaryDataPipeWriter::ContinueReadWrite,
base::Unretained(this)));
producer_writable_watcher_.Watch(
producer_handle_.get(), MOJO_HANDLE_SIGNAL_WRITABLE,
MOJO_TRIGGER_CONDITION_SIGNALS_SATISFIED,
base::BindRepeating(&SharedDictionaryDataPipeWriter::ContinueReadWrite,
base::Unretained(this)));
producer_closed_watcher_.Watch(
producer_handle_.get(), MOJO_HANDLE_SIGNAL_PEER_CLOSED,
MOJO_TRIGGER_CONDITION_SIGNALS_SATISFIED,
base::BindRepeating(&SharedDictionaryDataPipeWriter::OnPeerClosed,
base::Unretained(this)));
consumer_watcher_.ArmOrNotify();
producer_closed_watcher_.ArmOrNotify();
}
SharedDictionaryDataPipeWriter::~SharedDictionaryDataPipeWriter() = default;
void SharedDictionaryDataPipeWriter::OnComplete(bool success) {
DCHECK(!completion_result_.has_value());
completion_result_ = success;
MaybeFinish();
}
void SharedDictionaryDataPipeWriter::ContinueReadWrite(
MojoResult,
const mojo::HandleSignalsState& state) {
base::span<const uint8_t> buffer;
MojoResult result =
consumer_handle_->BeginReadData(MOJO_BEGIN_READ_DATA_FLAG_NONE, buffer);
switch (result) {
case MOJO_RESULT_OK:
break;
case MOJO_RESULT_FAILED_PRECONDITION:
// Successfully read the whole data.
FinishDataPipeOperation(/*success=*/true);
return;
case MOJO_RESULT_SHOULD_WAIT:
// `consumer_handle_` must be readable or closed here.
NOTREACHED();
default:
NOTREACHED();
}
size_t actually_written_bytes = 0;
result = producer_handle_->WriteData(buffer, MOJO_WRITE_DATA_FLAG_NONE,
actually_written_bytes);
buffer = buffer.first(actually_written_bytes);
switch (result) {
case MOJO_RESULT_OK:
break;
case MOJO_RESULT_SHOULD_WAIT:
consumer_handle_->EndReadData(0);
producer_writable_watcher_.ArmOrNotify();
return;
case MOJO_RESULT_FAILED_PRECONDITION:
// The data pipe consumer is aborted.
FinishDataPipeOperation(/*success=*/false);
return;
default:
NOTREACHED();
}
writer_->Append(buffer);
consumer_handle_->EndReadData(buffer.size());
consumer_watcher_.ArmOrNotify();
}
void SharedDictionaryDataPipeWriter::OnPeerClosed(
MojoResult,
const mojo::HandleSignalsState& state) {
// The data pipe consumer is aborted.
FinishDataPipeOperation(/*success=*/false);
}
void SharedDictionaryDataPipeWriter::FinishDataPipeOperation(bool success) {
DCHECK(!data_pipe_operation_result_.has_value());
data_pipe_operation_result_ = success;
consumer_watcher_.Cancel();
producer_writable_watcher_.Cancel();
producer_closed_watcher_.Cancel();
consumer_handle_.reset();
producer_handle_.reset();
MaybeFinish();
}
void SharedDictionaryDataPipeWriter::MaybeFinish() {
if (!writer_ || !finish_callback_) {
return;
}
if (!data_pipe_operation_result_.value_or(true) ||
!completion_result_.value_or(true)) {
// The data pipe consumer is aborted, or OnComplete() is called with false.
writer_.reset();
std::move(finish_callback_).Run(false);
return;
}
if (!data_pipe_operation_result_.has_value() ||
!completion_result_.has_value()) {
return;
}
DCHECK(*data_pipe_operation_result_);
DCHECK(*completion_result_);
// Successfully read the whole data, and OnComplete() is called with true.
writer_->Finish();
writer_.reset();
std::move(finish_callback_).Run(true);
}
} // namespace network
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