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// Copyright (c) 2010 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 "remoting/protocol/buffered_socket_writer.h"
#include "base/message_loop.h"
#include "net/base/net_errors.h"
namespace remoting {
BufferedSocketWriter::BufferedSocketWriter()
: socket_(NULL),
message_loop_(NULL),
buffer_size_(0),
write_pending_(false),
ALLOW_THIS_IN_INITIALIZER_LIST(
written_callback_(this, &BufferedSocketWriter::OnWritten)),
closed_(false) {
}
BufferedSocketWriter::~BufferedSocketWriter() { }
void BufferedSocketWriter::Init(net::Socket* socket,
WriteFailedCallback* callback) {
AutoLock auto_lock(lock_);
message_loop_ = MessageLoop::current();
socket_ = socket;
}
bool BufferedSocketWriter::Write(scoped_refptr<net::IOBufferWithSize> data) {
AutoLock auto_lock(lock_);
if (!socket_)
return false;
queue_.push_back(data);
buffer_size_ += data->size();
message_loop_->PostTask(
FROM_HERE, NewRunnableMethod(this, &BufferedSocketWriter::DoWrite));
return true;
}
void BufferedSocketWriter::DoWrite() {
DCHECK_EQ(message_loop_, MessageLoop::current());
DCHECK(socket_);
// Don't try to write if the writer not initialized or closed, or
// there is already a write pending.
if (write_pending_ || closed_)
return;
while (true) {
while (!current_buf_ || current_buf_->BytesRemaining() == 0) {
AutoLock auto_lock(lock_);
if (queue_.empty())
return; // Nothing to write.
current_buf_ =
new net::DrainableIOBuffer(queue_.front(), queue_.front()->size());
queue_.pop_front();
}
int result = socket_->Write(current_buf_, current_buf_->BytesRemaining(),
&written_callback_);
if (result >= 0) {
{
AutoLock auto_lock(lock_);
buffer_size_ -= result;
}
current_buf_->DidConsume(result);
} else {
if (result == net::ERR_IO_PENDING) {
write_pending_ = true;
} else {
if (write_failed_callback_.get())
write_failed_callback_->Run(result);
}
return;
}
}
}
void BufferedSocketWriter::OnWritten(int result) {
DCHECK_EQ(message_loop_, MessageLoop::current());
write_pending_ = false;
if (result < 0) {
if (write_failed_callback_.get())
write_failed_callback_->Run(result);
}
{
AutoLock auto_lock(lock_);
buffer_size_ -= result;
}
current_buf_->DidConsume(result);
// Schedule next write.
message_loop_->PostTask(
FROM_HERE, NewRunnableMethod(this, &BufferedSocketWriter::DoWrite));
}
int BufferedSocketWriter::GetBufferSize() {
AutoLock auto_lock(lock_);
return buffer_size_;
}
int BufferedSocketWriter::GetBufferChunks() {
AutoLock auto_lock(lock_);
return queue_.size();
}
void BufferedSocketWriter::Close() {
AutoLock auto_lock(lock_);
closed_ = true;
}
} // namespace remoting
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