mojo/shell/keep_alive.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 "mojo/shell/keep_alive.h"
   6
   7 #include "base/bind.h"
   8 #include "mojo/shell/context.h"
   9
  10 namespace mojo {
  11 namespace shell {
  12
  13 KeepAlive::KeepAlive(Context* context) : context_(context) {
  14   DCHECK(context_->task_runners()->ui_runner()->RunsTasksOnCurrentThread());
  15   ++context_->keep_alive_counter()->count_;
  16 }
  17
  18 KeepAlive::~KeepAlive() {
  19   DCHECK(context_->task_runners()->ui_runner()->RunsTasksOnCurrentThread());
  20   if (--context_->keep_alive_counter()->count_ == 0) {
  21     base::MessageLoop::current()->PostTask(
  22         FROM_HERE,
  23         base::Bind(&KeepAlive::MaybeQuit, context_));
  24   }
  25 }
  26
  27 // static
  28 void KeepAlive::MaybeQuit(Context* context) {
  29   if (context->keep_alive_counter()->count_ == 0)
  30     base::MessageLoop::current()->Quit();
  31 }
  32
  33 }  // namespace shell
  34 }  // namespace mojo