device/serial/async_waiter.cc

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "device/serial/async_waiter.h"
   6
   7 namespace device {
   8
   9 AsyncWaiter::AsyncWaiter(mojo::Handle handle,
  10                          MojoHandleSignals signals,
  11                          const Callback& callback)
  12     : waiter_(mojo::Environment::GetDefaultAsyncWaiter()),
  13       id_(0),
  14       callback_(callback) {
  15   id_ = waiter_->AsyncWait(handle.value(),
  16                            signals,
  17                            MOJO_DEADLINE_INDEFINITE,
  18                            &AsyncWaiter::WaitComplete,
  19                            this);
  20 }
  21
  22 AsyncWaiter::~AsyncWaiter() {
  23   if (id_)
  24     waiter_->CancelWait(id_);
  25 }
  26
  27 // static
  28 void AsyncWaiter::WaitComplete(void* waiter, MojoResult result) {
  29   static_cast<AsyncWaiter*>(waiter)->WaitCompleteInternal(result);
  30 }
  31
  32 void AsyncWaiter::WaitCompleteInternal(MojoResult result) {
  33   id_ = 0;
  34   callback_.Run(result);
  35 }
  36
  37 }  // namespace device