(PECL pthreads >= 2.0.0) Stacking public integer
(PECL pthreads >= 2.0.8) Determine whether an object has been marked as garbage
(PECL pthreads >= 2.0.0) State Detection public
(PECL pthreads >= 2.0.0) Create a Mutex final
(PECL pthreads >= 2.0.0) Synchronization public
(PECL pthreads >= 2.0.1) Execution public
(PECL pthreads >= 2.0.0) Attempt to Acquire Mutex
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