atomic_dec_and_mutex_lock(9)

1ATOMIC_DEC_AND_MUTEX(9)       Mutex API reference      ATOMIC_DEC_AND_MUTEX(9)
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NAME

6       atomic_dec_and_mutex_lock - return holding mutex if we dec to 0
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9       int atomic_dec_and_mutex_lock(atomic_t * cnt, struct mutex * lock);
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12       cnt
13           the atomic which we are to dec
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15       lock
16           the mutex to return holding if we dec to 0
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19       return true and hold lock if we dec to 0, return false otherwise
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22       Rusty Russell <rusty@rustcorp.com.au>
23           Author.
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26Kernel Hackers Manual 3.10         June 2019           ATOMIC_DEC_AND_MUTEX(9)