Restructure public side of network service.

mojo/services/public/cpp/network/web_socket_read_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_read_queue.h"
-
-#include "base/bind.h"
-
-namespace mojo {
-
-struct WebSocketReadQueue::Operation {
-  uint32_t num_bytes_;
-  base::Callback<void(const char*)> callback_;
-};
-
-WebSocketReadQueue::WebSocketReadQueue(DataPipeConsumerHandle handle)
-    : handle_(handle), is_waiting_(false) {
-}
-
-WebSocketReadQueue::~WebSocketReadQueue() {
-}
-
-void WebSocketReadQueue::Read(uint32_t num_bytes,
-                              base::Callback<void(const char*)> callback) {
-  Operation* op = new Operation;
-  op->num_bytes_ = num_bytes;
-  op->callback_ = callback;
-  queue_.push_back(op);
-
-  if (!is_waiting_)
-    TryToRead();
-}
-
-void WebSocketReadQueue::TryToRead() {
-  Operation* op = queue_[0];
-  const void* buffer = NULL;
-  uint32_t bytes_read = op->num_bytes_;
-  MojoResult result = BeginReadDataRaw(
-      handle_, &buffer, &bytes_read, MOJO_READ_DATA_FLAG_ALL_OR_NONE);
-  if (result == MOJO_RESULT_SHOULD_WAIT) {
-    EndReadDataRaw(handle_, bytes_read);
-    Wait();
-    return;
-  }
-
-  // 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;
-  DataPipeConsumerHandle handle = handle_;
-  op->callback_.Run(static_cast<const char*>(buffer));  // may delete |this|
-  EndReadDataRaw(handle, bytes_read);
-}
-
-void WebSocketReadQueue::Wait() {
-  is_waiting_ = true;
-  handle_watcher_.Start(
-      handle_,
-      MOJO_HANDLE_SIGNAL_READABLE,
-      MOJO_DEADLINE_INDEFINITE,
-      base::Bind(&WebSocketReadQueue::OnHandleReady, base::Unretained(this)));
-}
-
-void WebSocketReadQueue::OnHandleReady(MojoResult result) {
-  is_waiting_ = false;
-  TryToRead();
-}
-
-}  // namespace mojo