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#include <stddef.h>
#include <stdio.h>
#include <bits/pthreadtypes.h>
#include <bits/wordsize.h>
--
MUTEX offsetof (pthread_rwlock_t, __data.__lock)
NR_READERS offsetof (pthread_rwlock_t, __data.__nr_readers)
READERS_WAKEUP offsetof (pthread_rwlock_t, __data.__readers_wakeup)
WRITERS_WAKEUP offsetof (pthread_rwlock_t, __data.__writer_wakeup)
READERS_QUEUED offsetof (pthread_rwlock_t, __data.__nr_readers_queued)
WRITERS_QUEUED offsetof (pthread_rwlock_t, __data.__nr_writers_queued)
FLAGS offsetof (pthread_rwlock_t, __data.__flags)
WRITER offsetof (pthread_rwlock_t, __data.__writer)
PSHARED offsetof (pthread_rwlock_t, __data.__shared)
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