mirror of
https://github.com/klzgrad/naiveproxy.git
synced 2024-11-28 00:06:09 +03:00
77 lines
2.2 KiB
C
77 lines
2.2 KiB
C
|
// 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_CRITICAL_CLOSURE_H_
|
||
|
|
#define BASE_CRITICAL_CLOSURE_H_
|
||
|
|
|
||
|
|
#include <utility>
|
||
|
|
|
||
|
|
#include "base/callback.h"
|
||
|
|
#include "base/macros.h"
|
||
|
|
#include "build/build_config.h"
|
||
|
|
|
||
|
|
#if defined(OS_IOS)
|
||
|
|
#include "base/bind.h"
|
||
|
|
#include "base/ios/scoped_critical_action.h"
|
||
|
|
#endif
|
||
|
|
|
||
|
|
namespace base {
|
||
|
|
|
||
|
|
namespace internal {
|
||
|
|
|
||
|
|
#if defined(OS_IOS)
|
||
|
|
// Returns true if multi-tasking is supported on this iOS device.
|
||
|
|
bool IsMultiTaskingSupported();
|
||
|
|
|
||
|
|
// 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
|
||
|
|
// |ios::ScopedCriticalAction|.
|
||
|
|
class CriticalClosure {
|
||
|
|
public:
|
||
|
|
explicit CriticalClosure(OnceClosure closure);
|
||
|
|
~CriticalClosure();
|
||
|
|
void Run();
|
||
|
|
|
||
|
|
private:
|
||
|
|
ios::ScopedCriticalAction critical_action_;
|
||
|
|
OnceClosure closure_;
|
||
|
|
|
||
|
|
DISALLOW_COPY_AND_ASSIGN(CriticalClosure);
|
||
|
|
};
|
||
|
|
#endif // defined(OS_IOS)
|
||
|
|
|
||
|
|
} // namespace internal
|
||
|
|
|
||
|
|
// Returns a closure that will continue to run for a period of time when the
|
||
|
|
// application goes to the background if possible on platforms where
|
||
|
|
// applications don't execute while backgrounded, otherwise the original task is
|
||
|
|
// returned.
|
||
|
|
//
|
||
|
|
// Example:
|
||
|
|
// file_task_runner_->PostTask(
|
||
|
|
// FROM_HERE,
|
||
|
|
// MakeCriticalClosure(base::Bind(&WriteToDiskTask, path_, data)));
|
||
|
|
//
|
||
|
|
// Note new closures might be posted in this closure. If the new closures need
|
||
|
|
// background running time, |MakeCriticalClosure| should be applied on them
|
||
|
|
// before posting.
|
||
|
|
#if defined(OS_IOS)
|
||
|
|
inline OnceClosure MakeCriticalClosure(OnceClosure closure) {
|
||
|
|
DCHECK(internal::IsMultiTaskingSupported());
|
||
|
|
return base::BindOnce(
|
||
|
|
&internal::CriticalClosure::Run,
|
||
|
|
Owned(new internal::CriticalClosure(std::move(closure))));
|
||
|
|
}
|
||
|
|
#else // defined(OS_IOS)
|
||
|
|
inline OnceClosure MakeCriticalClosure(OnceClosure closure) {
|
||
|
|
// No-op for platforms where the application does not need to acquire
|
||
|
|
// background time for closures to finish when it goes into the background.
|
||
|
|
return closure;
|
||
|
|
}
|
||
|
|
#endif // defined(OS_IOS)
|
||
|
|
|
||
|
|
} // namespace base
|
||
|
|
|
||
|
|
#endif // BASE_CRITICAL_CLOSURE_H_
|