64 lines
2.2 KiB
C
64 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_SEQUENCE_CHECKER_IMPL_H_
|
||
|
|
#define BASE_SEQUENCE_CHECKER_IMPL_H_
|
||
|
|
|
||
|
|
#include <memory>
|
||
|
|
|
||
|
|
#include "base/base_export.h"
|
||
|
|
#include "base/compiler_specific.h"
|
||
|
|
#include "base/macros.h"
|
||
|
|
#include "base/synchronization/lock.h"
|
||
|
|
#include "base/thread_annotations.h"
|
||
|
|
|
||
|
|
namespace base {
|
||
|
|
|
||
|
|
// Real implementation of SequenceChecker for use in debug mode or for temporary
|
||
|
|
// use in release mode (e.g. to CHECK on a threading issue seen only in the
|
||
|
|
// wild).
|
||
|
|
//
|
||
|
|
// Note: You should almost always use the SequenceChecker class to get the right
|
||
|
|
// version for your build configuration.
|
||
|
|
// Note: This is only a check, not a "lock". It is marked "LOCKABLE" only in
|
||
|
|
// order to support thread_annotations.h.
|
||
|
|
class LOCKABLE BASE_EXPORT SequenceCheckerImpl {
|
||
|
|
public:
|
||
|
|
SequenceCheckerImpl();
|
||
|
|
~SequenceCheckerImpl();
|
||
|
|
|
||
|
|
// Allow move construct/assign. This must be called on |other|'s associated
|
||
|
|
// sequence and assignment can only be made into a SequenceCheckerImpl which
|
||
|
|
// is detached or already associated with the current sequence. This isn't
|
||
|
|
// thread-safe (|this| and |other| shouldn't be in use while this move is
|
||
|
|
// performed). If the assignment was legal, the resulting SequenceCheckerImpl
|
||
|
|
// will be bound to the current sequence and |other| will be detached.
|
||
|
|
SequenceCheckerImpl(SequenceCheckerImpl&& other);
|
||
|
|
SequenceCheckerImpl& operator=(SequenceCheckerImpl&& other);
|
||
|
|
|
||
|
|
// Returns true if called in sequence with previous calls to this method and
|
||
|
|
// the constructor.
|
||
|
|
bool CalledOnValidSequence() const WARN_UNUSED_RESULT;
|
||
|
|
|
||
|
|
// Unbinds the checker from the currently associated sequence. The checker
|
||
|
|
// will be re-bound on the next call to CalledOnValidSequence().
|
||
|
|
void DetachFromSequence();
|
||
|
|
|
||
|
|
private:
|
||
|
|
class Core;
|
||
|
|
|
||
|
|
// Calls straight to ThreadLocalStorage::HasBeenDestroyed(). Exposed purely
|
||
|
|
// for 'friend' to work.
|
||
|
|
static bool HasThreadLocalStorageBeenDestroyed();
|
||
|
|
|
||
|
|
mutable Lock lock_;
|
||
|
|
mutable std::unique_ptr<Core> core_ GUARDED_BY(lock_);
|
||
|
|
|
||
|
|
DISALLOW_COPY_AND_ASSIGN(SequenceCheckerImpl);
|
||
|
|
};
|
||
|
|
|
||
|
|
} // namespace base
|
||
|
|
|
||
|
|
#endif // BASE_SEQUENCE_CHECKER_IMPL_H_
|