Revert of Update mojo sdk to rev afb4440fd5a10cba980878c326180b7ad7960480

mojo/public/dart/src/handle.dart

-// 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.
-
-part of core;
-
-
-class _MojoHandleNatives {
-  static int close(int handle) native "MojoHandle_Close";
-  static int wait(int handle, int signals, int deadline)
-      native "MojoHandle_Wait";
-  static int waitMany(
-      List handles, List signals, int num_handles, int deadline)
-      native "MojoHandle_WaitMany";
-}
-
-
-class RawMojoHandle {
-  static const int INVALID = 0;
-  static const int DEADLINE_INDEFINITE = -1;
-
-  RawMojoHandle(this.h);
-
-  MojoResult close() {
-    int result = _MojoHandleNatives.close(h);
-    h = INVALID;
-    return new MojoResult(result);
-  }
-
-  MojoResult wait(int signals, int deadline) {
-    int result = _MojoHandleNatives.wait(h, signals, deadline);
-    return new MojoResult(result);
-  }
-
-  bool _ready(int signal) {
-    MojoResult res = wait(signal, 0);
-    switch (res) {
-      case MojoResult.OK:
-        return true;
-      case MojoResult.DEADLINE_EXCEEDED:
-      case MojoResult.CANCELLED:
-      case MojoResult.INVALID_ARGUMENT:
-      case MojoResult.FAILED_PRECONDITION:
-        return false;
-      default:
-        // Should be unreachable.
-        throw new Exception("Unreachable");
-    }
-  }
-
-  bool readyRead() => _ready(MojoHandleSignals.READABLE);
-  bool readyWrite() => _ready(MojoHandleSignals.WRITABLE);
-
-  static MojoResult waitMany(List<int> handles,
-                             List<int> signals,
-                             int deadline) {
-    if (handles.length != signals.length) {
-      return MojoResult.INVALID_ARGUMENT;
-    }
-    int result = _MojoHandleNatives.waitMany(
-        handles, signals, handles.length, deadline);
-    return new MojoResult(result);
-  }
-
-  static bool isValid(RawMojoHandle h) => (h.h != INVALID);
-
-  int h;
-}