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// 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.
#include "base/critical_closure.h"
#import <UIKit/UIKit.h>
#include "base/bind.h"
#include "base/ios/scoped_critical_action.h"
#include "base/memory/ref_counted.h"
namespace {
// This class wraps a closure so it can continue to run for a period of time
// when the application goes to the background by using
// |base::ios::ScopedCriticalAction|.
class CriticalClosure : public base::RefCountedThreadSafe<CriticalClosure> {
public:
explicit CriticalClosure(base::Closure* closure) : closure_(closure) {
background_scope_.reset(new base::ios::ScopedCriticalAction());
}
void Run() {
closure_->Run();
background_scope_.reset();
}
private:
friend class base::RefCountedThreadSafe<CriticalClosure>;
virtual ~CriticalClosure() {}
scoped_ptr<base::Closure> closure_;
scoped_ptr<base::ios::ScopedCriticalAction> background_scope_;
DISALLOW_COPY_AND_ASSIGN(CriticalClosure);
};
} // namespace
namespace base {
base::Closure MakeCriticalClosure(const base::Closure& closure) {
DCHECK([[UIDevice currentDevice] isMultitaskingSupported]);
scoped_refptr<CriticalClosure> critical_closure(
new CriticalClosure(new base::Closure(closure)));
return base::Bind(&CriticalClosure::Run, critical_closure.get());
}
} // namespace base
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