Mojo: Move waiting APIs to public library

mojo/edk/system/awakable_list.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_EDK_SYSTEM_AWAKABLE_LIST_H_
-#define MOJO_EDK_SYSTEM_AWAKABLE_LIST_H_
-
-#include <stddef.h>
-#include <stdint.h>
-
-#include <vector>
-
-#include "base/macros.h"
-#include "mojo/edk/system/system_impl_export.h"
-#include "mojo/public/c/system/types.h"
-#include "mojo/public/cpp/system/handle_signals_state.h"
-
-namespace mojo {
-namespace edk {
-
-class Awakable;
-
-// |AwakableList| tracks all the |Waiter|s that are waiting on a given
-// handle/|Dispatcher|. There should be a |AwakableList| for each handle that
-// can be waited on (in any way). In the simple case, the |AwakableList| is
-// owned by the |Dispatcher|, whereas in more complex cases it is owned by the
-// secondary object (see simple_dispatcher.* and the explanatory comment in
-// core.cc). This class is thread-unsafe (all concurrent access must be
-// protected by some lock).
-class MOJO_SYSTEM_IMPL_EXPORT AwakableList {
- public:
-  AwakableList();
-  ~AwakableList();
-
-  void AwakeForStateChange(const HandleSignalsState& state);
-  void CancelAll();
-  void Add(Awakable* awakable, MojoHandleSignals signals, uintptr_t context);
-  void Remove(Awakable* awakable);
-
- private:
-  struct AwakeInfo {
-    AwakeInfo(Awakable* awakable, MojoHandleSignals signals, uintptr_t context)
-        : awakable(awakable), signals(signals), context(context) {}
-
-    Awakable* awakable;
-    MojoHandleSignals signals;
-    uintptr_t context;
-  };
-  using AwakeInfoList = std::vector<AwakeInfo>;
-
-  AwakeInfoList awakables_;
-
-  DISALLOW_COPY_AND_ASSIGN(AwakableList);
-};
-
-}  // namespace edk
-}  // namespace mojo
-
-#endif  // MOJO_EDK_SYSTEM_AWAKABLE_LIST_H_