diff options
author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 17:32:43 +0000 |
---|---|---|
committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 17:32:43 +0000 |
commit | 6bf0a5cb5034a7e684dcc3500e841785237ce2dd (patch) | |
tree | a68f146d7fa01f0134297619fbe7e33db084e0aa /security/sandbox/chromium/base/threading/thread_checker_impl.h | |
parent | Initial commit. (diff) | |
download | thunderbird-6bf0a5cb5034a7e684dcc3500e841785237ce2dd.tar.xz thunderbird-6bf0a5cb5034a7e684dcc3500e841785237ce2dd.zip |
Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'security/sandbox/chromium/base/threading/thread_checker_impl.h')
-rw-r--r-- | security/sandbox/chromium/base/threading/thread_checker_impl.h | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/security/sandbox/chromium/base/threading/thread_checker_impl.h b/security/sandbox/chromium/base/threading/thread_checker_impl.h new file mode 100644 index 0000000000..b325db6ae8 --- /dev/null +++ b/security/sandbox/chromium/base/threading/thread_checker_impl.h @@ -0,0 +1,74 @@ +// Copyright (c) 2011 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_THREADING_THREAD_CHECKER_IMPL_H_ +#define BASE_THREADING_THREAD_CHECKER_IMPL_H_ + +#include "base/base_export.h" +#include "base/compiler_specific.h" +#include "base/sequence_token.h" +#include "base/synchronization/lock.h" +#include "base/thread_annotations.h" +#include "base/threading/platform_thread.h" + +namespace base { + +// Real implementation of ThreadChecker, 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 ThreadChecker 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 ThreadCheckerImpl { + public: + ThreadCheckerImpl(); + ~ThreadCheckerImpl(); + + // Allow move construct/assign. This must be called on |other|'s associated + // thread and assignment can only be made into a ThreadCheckerImpl which is + // detached or already associated with the current thread. 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 ThreadCheckerImpl + // will be bound to the current thread and |other| will be detached. + ThreadCheckerImpl(ThreadCheckerImpl&& other); + ThreadCheckerImpl& operator=(ThreadCheckerImpl&& other); + + bool CalledOnValidThread() const WARN_UNUSED_RESULT; + + // Changes the thread that is checked for in CalledOnValidThread. This may + // be useful when an object may be created on one thread and then used + // exclusively on another thread. + void DetachFromThread(); + + private: + void EnsureAssignedLockRequired() const EXCLUSIVE_LOCKS_REQUIRED(lock_); + + // Members are mutable so that CalledOnValidThread() can set them. + + // Synchronizes access to all members. + mutable base::Lock lock_; + + // Thread on which CalledOnValidThread() may return true. + mutable PlatformThreadRef thread_id_ GUARDED_BY(lock_); + + // TaskToken for which CalledOnValidThread() always returns true. This allows + // CalledOnValidThread() to return true when called multiple times from the + // same task, even if it's not running in a single-threaded context itself + // (allowing usage of ThreadChecker objects on the stack in the scope of one- + // off tasks). Note: CalledOnValidThread() may return true even if the current + // TaskToken is not equal to this. + mutable TaskToken task_token_ GUARDED_BY(lock_); + + // SequenceToken for which CalledOnValidThread() may return true. Used to + // ensure that CalledOnValidThread() doesn't return true for ThreadPool + // tasks that happen to run on the same thread but weren't posted to the same + // SingleThreadTaskRunner. + mutable SequenceToken sequence_token_ GUARDED_BY(lock_); +}; + +} // namespace base + +#endif // BASE_THREADING_THREAD_CHECKER_IMPL_H_ |