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Diffstat (limited to 'base/ios/scoped_critical_action.h')
-rw-r--r-- | base/ios/scoped_critical_action.h | 68 |
1 files changed, 0 insertions, 68 deletions
diff --git a/base/ios/scoped_critical_action.h b/base/ios/scoped_critical_action.h deleted file mode 100644 index 803d587517..0000000000 --- a/base/ios/scoped_critical_action.h +++ /dev/null @@ -1,68 +0,0 @@ -// Copyright (c) 2012 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 BASE_IOS_SCOPED_CRITICAL_ACTION_H_ -#define BASE_IOS_SCOPED_CRITICAL_ACTION_H_ - -#include "base/memory/ref_counted.h" -#include "base/synchronization/lock.h" - -namespace base { -namespace ios { - -// This class attempts to allow the application to continue to run for a period -// of time after it transitions to the background. The construction of an -// instance of this class marks the beginning of a task that needs background -// running time when the application is moved to the background and the -// destruction marks the end of such a task. -// -// Note there is no guarantee that the task will continue to finish when the -// application is moved to the background. -// -// This class should be used at times where leaving a task unfinished might be -// detrimental to user experience. For example, it should be used to ensure that -// the application has enough time to save important data or at least attempt to -// save such data. -class ScopedCriticalAction { - public: - ScopedCriticalAction(); - ~ScopedCriticalAction(); - - private: - // Core logic; ScopedCriticalAction should not be reference counted so - // that it follows the normal pattern of stack-allocating ScopedFoo objects, - // but the expiration handler needs to have a reference counted object to - // refer to. - class Core : public base::RefCountedThreadSafe<Core> { - public: - Core(); - - // Informs the OS that the background task has completed. - void EndBackgroundTask(); - - private: - friend base::RefCountedThreadSafe<Core>; - ~Core(); - - // |UIBackgroundTaskIdentifier| returned by - // |beginBackgroundTaskWithExpirationHandler:| when marking the beginning of - // a long-running background task. It is defined as an |unsigned int| - // instead of a |UIBackgroundTaskIdentifier| so this class can be used in - // .cc files. - unsigned int background_task_id_; - Lock background_task_id_lock_; - - DISALLOW_COPY_AND_ASSIGN(Core); - }; - - // The instance of the core that drives the background task. - scoped_refptr<Core> core_; - - DISALLOW_COPY_AND_ASSIGN(ScopedCriticalAction); -}; - -} // namespace ios -} // namespace base - -#endif // BASE_IOS_SCOPED_CRITICAL_ACTION_H_ |