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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 "chrome/test/chromedriver/net/pipe_writer_posix.h"
#include <errno.h>
#include <memory>
#include <utility>
#include "base/files/file_util.h"
#include "base/functional/bind.h"
#include "base/functional/callback_helpers.h"
#include "base/logging.h"
#include "base/task/current_thread.h"
#include "net/base/io_buffer.h"
#include "net/base/net_errors.h"
#if BUILDFLAG(IS_FUCHSIA)
#include <poll.h>
#include <sys/ioctl.h>
#endif // BUILDFLAG(IS_FUCHSIA)
PipeWriterPosix::PipeWriterPosix()
: fd_(base::kInvalidPlatformFile), write_fd_watcher_(FROM_HERE) {}
PipeWriterPosix::~PipeWriterPosix() {
Close();
}
int PipeWriterPosix::Bind(base::ScopedFD fd) {
DCHECK_CALLED_ON_VALID_THREAD(thread_checker_);
DCHECK(!fd_.is_valid());
fd_ = std::move(fd);
if (!base::SetNonBlocking(fd_.get())) {
int rv = net::MapSystemError(errno);
Close();
return rv;
}
is_connected_ = true;
return net::OK;
}
bool PipeWriterPosix::IsConnected() const {
DCHECK_CALLED_ON_VALID_THREAD(thread_checker_);
return is_connected_;
}
int PipeWriterPosix::Write(net::IOBuffer* buf,
int buf_len,
net::CompletionOnceCallback callback) {
DCHECK_CALLED_ON_VALID_THREAD(thread_checker_);
DCHECK(fd_.is_valid());
CHECK(write_callback_.is_null());
// Synchronous operation not supported
CHECK(!callback.is_null());
CHECK_LT(0, buf_len);
int rv = DoWrite(buf, buf_len);
if (rv == net::ERR_IO_PENDING) {
rv = WaitForWrite(buf, buf_len, std::move(callback));
}
is_connected_ = (rv == net::ERR_IO_PENDING) || (rv > 0);
return rv;
}
int PipeWriterPosix::WaitForWrite(net::IOBuffer* buf,
int buf_len,
net::CompletionOnceCallback callback) {
DCHECK_CALLED_ON_VALID_THREAD(thread_checker_);
DCHECK(fd_.is_valid());
DCHECK(write_callback_.is_null());
// Synchronous operation not supported
DCHECK(!callback.is_null());
DCHECK_LT(0, buf_len);
if (!base::CurrentIOThread::Get()->WatchFileDescriptor(
fd_.get(), true, base::MessagePumpForIO::WATCH_WRITE,
&write_fd_watcher_, this)) {
PLOG(ERROR) << "WatchFileDescriptor failed on write";
return net::MapSystemError(errno);
}
write_buf_ = buf;
write_buf_len_ = buf_len;
write_callback_ = std::move(callback);
return net::ERR_IO_PENDING;
}
int PipeWriterPosix::DoWrite(net::IOBuffer* buf, int buf_len) {
int rv = HANDLE_EINTR(write(fd_.get(), buf->data(), buf_len));
if (rv >= 0) {
CHECK_LE(rv, buf_len);
}
return rv >= 0 ? rv : net::MapSystemError(errno);
}
void PipeWriterPosix::Close() {
DCHECK_CALLED_ON_VALID_THREAD(thread_checker_);
is_connected_ = false;
bool ok = write_fd_watcher_.StopWatchingFileDescriptor();
DCHECK(ok);
// These needs to be done after the StopWatchingFileDescriptor() calls, but
// before deleting the write buffer.
fd_.reset();
if (!write_callback_.is_null()) {
write_buf_.reset();
write_buf_len_ = 0;
write_callback_.Reset();
}
}
void PipeWriterPosix::DetachFromThread() {
DETACH_FROM_THREAD(thread_checker_);
}
void PipeWriterPosix::OnFileCanReadWithoutBlocking(int fd) {}
void PipeWriterPosix::OnFileCanWriteWithoutBlocking(int fd) {
DCHECK(!write_callback_.is_null());
int rv = DoWrite(write_buf_.get(), write_buf_len_);
if (rv == net::ERR_IO_PENDING) {
return;
}
is_connected_ = (rv == net::ERR_IO_PENDING) || (rv > 0);
bool ok = write_fd_watcher_.StopWatchingFileDescriptor();
DCHECK(ok);
write_buf_.reset();
write_buf_len_ = 0;
std::move(write_callback_).Run(rv);
}
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