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author | vandebo@chromium.org <vandebo@chromium.org@0039d316-1c4b-4281-b951-d872f2087c98> | 2013-07-20 11:51:28 +0000 |
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committer | vandebo@chromium.org <vandebo@chromium.org@0039d316-1c4b-4281-b951-d872f2087c98> | 2013-07-20 11:51:28 +0000 |
commit | 87738f7d5cdb54e524520144f28baa78e38098e2 (patch) | |
tree | 3c1db8b038a88450c85a4703b5f399ad9e23f942 /base/sequence_checker_impl.h | |
parent | a077da7b45007de882a8d843ad084ff2eba14c2f (diff) | |
download | chromium_src-87738f7d5cdb54e524520144f28baa78e38098e2.zip chromium_src-87738f7d5cdb54e524520144f28baa78e38098e2.tar.gz chromium_src-87738f7d5cdb54e524520144f28baa78e38098e2.tar.bz2 |
Revert 211956 "base: Change WeakPtr to use SequenceChecker inste..."
As well as revert 212725 "base: Make SequenceChecker death tests multi-threads work correctly."
See http://crbug.com/261448
> base: Change WeakPtr to use SequenceChecker instead of ThreadChecker.
>
> This will enable WeakPtr to be used in SequencedWorkerPool, et al. with a sequence token.
>
> This is a continuation of issue: https://chromiumcodereview.appspot.com/18231002/
>
> The original issue got messed up by a rietveld bug, so refer there for history and comments.
>
> BUG=165590
>
> Review URL: https://chromiumcodereview.appspot.com/18501008
TBR=tommycli@chromium.org
Review URL: https://chromiumcodereview.appspot.com/19695005
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@212780 0039d316-1c4b-4281-b951-d872f2087c98
Diffstat (limited to 'base/sequence_checker_impl.h')
-rw-r--r-- | base/sequence_checker_impl.h | 42 |
1 files changed, 24 insertions, 18 deletions
diff --git a/base/sequence_checker_impl.h b/base/sequence_checker_impl.h index 741aafe..ccd1198 100644 --- a/base/sequence_checker_impl.h +++ b/base/sequence_checker_impl.h @@ -7,42 +7,48 @@ #include "base/base_export.h" #include "base/basictypes.h" +#include "base/memory/ref_counted.h" #include "base/synchronization/lock.h" -#include "base/threading/sequenced_worker_pool.h" #include "base/threading/thread_checker_impl.h" namespace base { +class SequencedTaskRunner; + // SequenceCheckerImpl is used to help verify that some methods of a // class are called in sequence -- that is, called from the same // SequencedTaskRunner. It is a generalization of ThreadChecker; in -// particular, it behaves exactly like ThreadChecker if constructed -// on a thread that is not part of a SequencedWorkerPool. +// particular, it behaves exactly like ThreadChecker if its passed a +// NULL SequencedTaskRunner. class BASE_EXPORT SequenceCheckerImpl { public: - SequenceCheckerImpl(); + // |sequenced_task_runner| can be NULL. In that case, this object + // behaves exactly like a ThreadChecker bound to the current thread, + // i.e. CalledOnValidSequence() behaves like CalledOnValidThread(). + explicit SequenceCheckerImpl( + const scoped_refptr<SequencedTaskRunner>& sequenced_task_runner); ~SequenceCheckerImpl(); - // Returns whether the we are being called on the same sequence token - // as previous calls. If there is no associated sequence, then returns - // whether we are being called on the underlying ThreadChecker's thread. - bool CalledOnValidSequencedThread() const; + // Returns whether the we are being called on the underyling + // SequencedTaskRunner. If we're not bound to a + // |sequenced_task_runner|, returns whether we are being called on + // the underlying ThreadChecker's thread. + bool CalledOnValidSequence() const; - // Unbinds the checker from the currently associated sequence. The - // checker will be re-bound on the next call to CalledOnValidSequence(). - void DetachFromSequence(); + // Changes the underyling SequencedTaskRunner. + // |sequenced_task_runner| can be NULL. In that case, this object + // behaves exactly like a ThreadChecker that has been detached from + // its thread, i.e. we will be bound to the thread on which we next + // call CalledOnValidSequence(). + void ChangeSequence( + const scoped_refptr<SequencedTaskRunner>& sequenced_task_runner); private: - void EnsureSequenceTokenAssigned() const; - // Guards all variables below. mutable Lock lock_; - - // Used if |sequence_token_| is not valid. + scoped_refptr<SequencedTaskRunner> sequenced_task_runner_; + // Used if |sequenced_task_runner_| is NULL. ThreadCheckerImpl thread_checker_; - mutable bool sequence_token_assigned_; - - mutable SequencedWorkerPool::SequenceToken sequence_token_; DISALLOW_COPY_AND_ASSIGN(SequenceCheckerImpl); }; |