Function report |
Source Code:lib\refcount.c |
Create Date:2022-07-28 06:25:20 |
Last Modify:2020-03-12 14:18:49 | Copyright©Brick |
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Name:_dec_not_one - decrement a refcount if it is not 1*@r: the refcount* No atomic_t counterpart, it decrements unless the value is 1, in which case* it will return false
Proto:bool refcount_dec_not_one(refcount_t *r)
Type:bool
Parameter:
Type | Parameter | Name |
---|---|---|
refcount_t * | r |
76 | val = atomic_read( & refs) |
78 | Do |
79 | If Value for the false possibility is greater at compile time(val == REFCOUNT_SATURATED) Then Return true |
82 | If val == 1 Then Return false |
91 | When Not atomic_try_cmpxchg_release( & refs, & val, new) cycle |
93 | Return true |
Name | Describe |
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refcount_dec_and_mutex_lock | _dec_and_mutex_lock - return holding mutex if able to decrement* refcount to 0*@r: the refcount*@lock: the mutex to be locked* Similar to atomic_dec_and_mutex_lock(), it will WARN on underflow and fail* to decrement when saturated at REFCOUNT_SATURATED |
refcount_dec_and_lock | _dec_and_lock - return holding spinlock if able to decrement* refcount to 0*@r: the refcount*@lock: the spinlock to be locked* Similar to atomic_dec_and_lock(), it will WARN on underflow and fail to* decrement when saturated at REFCOUNT_SATURATED |
refcount_dec_and_lock_irqsave | _dec_and_lock_irqsave - return holding spinlock with disabled* interrupts if able to decrement refcount to 0*@r: the refcount*@lock: the spinlock to be locked*@flags: saved IRQ-flags if the is acquired* Same as refcount_dec_and_lock() above except that |
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