| // 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. |
| |
| #include "content/browser/startup_task_runner.h" |
| |
| #include "base/bind.h" |
| #include "base/location.h" |
| #include "base/message_loop/message_loop.h" |
| |
| namespace content { |
| |
| StartupTaskRunner::StartupTaskRunner( |
| base::Callback<void(int)> const startup_complete_callback, |
| scoped_refptr<base::SingleThreadTaskRunner> proxy) |
| : startup_complete_callback_(startup_complete_callback), proxy_(proxy) {} |
| |
| StartupTaskRunner::~StartupTaskRunner() {} |
| |
| void StartupTaskRunner::AddTask(StartupTask& callback) { |
| task_list_.push_back(callback); |
| } |
| |
| void StartupTaskRunner::StartRunningTasksAsync() { |
| DCHECK(proxy_.get()); |
| int result = 0; |
| if (task_list_.empty()) { |
| if (!startup_complete_callback_.is_null()) { |
| startup_complete_callback_.Run(result); |
| // Clear the callback to prevent it being called a second time |
| startup_complete_callback_.Reset(); |
| } |
| } else { |
| const base::Closure next_task = |
| base::Bind(&StartupTaskRunner::WrappedTask, base::Unretained(this)); |
| proxy_->PostNonNestableTask(FROM_HERE, next_task); |
| } |
| } |
| |
| void StartupTaskRunner::RunAllTasksNow() { |
| int result = 0; |
| for (std::list<StartupTask>::iterator it = task_list_.begin(); |
| it != task_list_.end(); |
| it++) { |
| result = it->Run(); |
| if (result > 0) break; |
| } |
| task_list_.clear(); |
| if (!startup_complete_callback_.is_null()) { |
| startup_complete_callback_.Run(result); |
| // Clear the callback to prevent it being called a second time |
| startup_complete_callback_.Reset(); |
| } |
| } |
| |
| void StartupTaskRunner::WrappedTask() { |
| if (task_list_.empty()) { |
| // This will happen if the remaining tasks have been run synchronously since |
| // the WrappedTask was created. Any callback will already have been called, |
| // so there is nothing to do |
| return; |
| } |
| int result = task_list_.front().Run(); |
| task_list_.pop_front(); |
| if (result > 0) { |
| // Stop now and throw away the remaining tasks |
| task_list_.clear(); |
| } |
| if (task_list_.empty()) { |
| if (!startup_complete_callback_.is_null()) { |
| startup_complete_callback_.Run(result); |
| // Clear the callback to prevent it being called a second time |
| startup_complete_callback_.Reset(); |
| } |
| } else { |
| const base::Closure next_task = |
| base::Bind(&StartupTaskRunner::WrappedTask, base::Unretained(this)); |
| proxy_->PostNonNestableTask(FROM_HERE, next_task); |
| } |
| } |
| |
| } // namespace content |