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#define RWLOCK_INITIALIZE(rwlock)   \
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#define RWLOCK_INITIALIZE(rwlock)   \
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    rwlock_t rwlock = FUTEX_INITIALIZER
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    rwlock_t rwlock = FUTEX_INITIALIZER
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#define rwlock_initialize(rwlock)   futex_initialize((rwlock), 1)
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#define rwlock_initialize(rwlock)   futex_initialize((rwlock), 1)
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#define rwlock_reader_lock(rwlock)  futex_down((rwlock))
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#define rwlock_read_lock(rwlock)    futex_down((rwlock))
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#define rwlock_writer_lock(rwlock)  futex_down((rwlock))
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#define rwlock_write_lock(rwlock)   futex_down((rwlock))
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#define rwlock_reader_unlock(rwlock)    futex_up((rwlock))
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#define rwlock_read_unlock(rwlock)  futex_up((rwlock))
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#define rwlock_writer_unlock(rwlock)    futex_up((rwlock))
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#define rwlock_write_unlock(rwlock) futex_up((rwlock))
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#endif
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#endif
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/** @}
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/** @}
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 */
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 */