Mojo: Move mojo/public/utility to mojo/public/cpp/utility.

mojo/public/utility/run_loop.h

-// Copyright 2013 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.
-
-#ifndef MOJO_PUBLIC_UTILITY_RUN_LOOP_H_
-#define MOJO_PUBLIC_UTILITY_RUN_LOOP_H_
-
-#include <map>
-
-#include "mojo/public/cpp/system/core.h"
-
-namespace mojo {
-
-class RunLoopHandler;
-
-class RunLoop {
- public:
-  RunLoop();
-  ~RunLoop();
-
-  // Sets up state needed for RunLoop. This must be invoked before creating a
-  // RunLoop.
-  static void SetUp();
-
-  // Cleans state created by Setup().
-  static void TearDown();
-
-  // Returns the RunLoop for the current thread. Returns NULL if not yet
-  // created.
-  static RunLoop* current();
-
-  // Registers a RunLoopHandler for the specified handle. Only one handler can
-  // be registered for a specified handle.
-  void AddHandler(RunLoopHandler* handler,
-                  const Handle& handle,
-                  MojoWaitFlags wait_flags,
-                  MojoDeadline deadline);
-  void RemoveHandler(const Handle& handle);
-  bool HasHandler(const Handle& handle) const;
-
-  // Runs the loop servicing handles as they are ready. This returns when Quit()
-  // is invoked, or there no more handles.
-  void Run();
-
-  // Runs the loop servicing any handles that are ready. Does not wait for
-  // handles to become ready before returning. Returns early if Quit() is
-  // invoked.
-  void RunUntilIdle();
-
-  void Quit();
-
- private:
-  struct RunState;
-  struct WaitState;
-
-  // Contains the data needed to track a request to AddHandler().
-  struct HandlerData {
-    HandlerData()
-        : handler(NULL),
-          wait_flags(MOJO_WAIT_FLAG_NONE),
-          deadline(0),
-          id(0) {}
-
-    RunLoopHandler* handler;
-    MojoWaitFlags wait_flags;
-    MojoTimeTicks deadline;
-    // See description of |RunLoop::next_handler_id_| for details.
-    int id;
-  };
-
-  typedef std::map<Handle, HandlerData> HandleToHandlerData;
-
-  // Waits for a handle to be ready. Returns after servicing at least one
-  // handle (or there are no more handles) unless |non_blocking| is true,
-  // in which case it will also return if servicing at least one handle
-  // would require blocking. Returns true if a RunLoopHandler was notified.
-  bool Wait(bool non_blocking);
-
-  // Notifies any handlers whose deadline has expired. Returns true if a
-  // RunLoopHandler was notified.
-  bool NotifyDeadlineExceeded();
-
-  // Removes the first invalid handle. This is called if MojoWaitMany() finds an
-  // invalid handle. Returns true if a RunLoopHandler was notified.
-  bool RemoveFirstInvalidHandle(const WaitState& wait_state);
-
-  // Returns the state needed to pass to WaitMany().
-  WaitState GetWaitState(bool non_blocking) const;
-
-  HandleToHandlerData handler_data_;
-
-  // If non-NULL we're running (inside Run()). Member references a value on the
-  // stack.
-  RunState* run_state_;
-
-  // An ever increasing value assigned to each HandlerData::id. Used to detect
-  // uniqueness while notifying. That is, while notifying expired timers we copy
-  // |handler_data_| and only notify handlers whose id match. If the id does not
-  // match it means the handler was removed then added so that we shouldn't
-  // notify it.
-  int next_handler_id_;
-
-  MOJO_DISALLOW_COPY_AND_ASSIGN(RunLoop);
-};
-
-}  // namespace mojo
-
-#endif  // MOJO_PUBLIC_UTILITY_RUN_LOOP_H_