Restructure public side of network service.

mojo/services/public/cpp/network/web_socket_write_queue.cc

-// Copyright 2014 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 "mojo/services/public/cpp/network/web_socket_write_queue.h"
-
-#include "base/bind.h"
-
-namespace mojo {
-
-struct WebSocketWriteQueue::Operation {
-  uint32_t num_bytes_;
-  base::Callback<void(const char*)> callback_;
-
-  const char* data_;
-  // Only initialized if the initial Write fails. This saves a copy in
-  // the common case.
-  std::vector<char> data_copy_;
-};
-
-WebSocketWriteQueue::WebSocketWriteQueue(DataPipeProducerHandle handle)
-    : handle_(handle), is_waiting_(false) {
-}
-
-WebSocketWriteQueue::~WebSocketWriteQueue() {
-}
-
-void WebSocketWriteQueue::Write(const char* data,
-                                uint32_t num_bytes,
-                                base::Callback<void(const char*)> callback) {
-  Operation* op = new Operation;
-  op->num_bytes_ = num_bytes;
-  op->callback_ = callback;
-  op->data_ = data;
-  queue_.push_back(op);
-
-  MojoResult result = MOJO_RESULT_SHOULD_WAIT;
-  if (!is_waiting_)
-    result = TryToWrite();
-
-  // If we have to wait, make a local copy of the data so we know it will
-  // live until we need it.
-  if (result == MOJO_RESULT_SHOULD_WAIT) {
-    op->data_copy_.resize(num_bytes);
-    memcpy(&op->data_copy_[0], data, num_bytes);
-    op->data_ = &op->data_copy_[0];
-  }
-}
-
-MojoResult WebSocketWriteQueue::TryToWrite() {
-  Operation* op = queue_[0];
-  uint32_t bytes_written = op->num_bytes_;
-  MojoResult result = WriteDataRaw(
-      handle_, op->data_, &bytes_written, MOJO_WRITE_DATA_FLAG_ALL_OR_NONE);
-  if (result == MOJO_RESULT_SHOULD_WAIT) {
-    Wait();
-    return result;
-  }
-
-  // Ensure |op| is deleted, whether or not |this| goes away.
-  scoped_ptr<Operation> op_deleter(op);
-  queue_.weak_erase(queue_.begin());
-  if (result != MOJO_RESULT_OK)
-    return result;
-
-  op->callback_.Run(op->data_);  // may delete |this|
-  return result;
-}
-
-void WebSocketWriteQueue::Wait() {
-  is_waiting_ = true;
-  handle_watcher_.Start(handle_,
-                        MOJO_HANDLE_SIGNAL_WRITABLE,
-                        MOJO_DEADLINE_INDEFINITE,
-                        base::Bind(&WebSocketWriteQueue::OnHandleReady,
-                                   base::Unretained(this)));
-}
-
-void WebSocketWriteQueue::OnHandleReady(MojoResult result) {
-  is_waiting_ = false;
-  TryToWrite();
-}
-
-}  // namespace mojo