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spinlock: add support of spin_trylock_irqsave()

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trylock spinlock in critical section:

bool spin_trylock_irqsave(FAR volatile spinlock_t *lock, irqstate_t flags);
bool spin_trylock_irqsave_wo_note(FAR volatile spinlock_t *lock, irqstate_t flags);

Signed-off-by: chao an <anchao@lixiang.com>
This commit is contained in:
chao an 2024-08-04 22:30:16 +08:00 committed by Xiang Xiao
parent a3b94383ed
commit 9cc25523b1
1 changed files with 75 additions and 0 deletions
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75
include/nuttx/spinlock.h
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@ -626,6 +626,81 @@ irqstate_t spin_lock_irqsave(FAR volatile spinlock_t *lock)
# define spin_lock_irqsave(l) ((void)(l), up_irq_save())
#endif
/****************************************************************************
* Name: spin_trylock_irqsave_wo_note
*
* Description:
* Try once to lock the spinlock. Do not wait if the spinlock is already
* locked.
*
* This implementation is the same as the above spin_trylock() except that
* it does not perform instrumentation logic.
*
* Input Parameters:
* lock - A reference to the spinlock object to lock.
* flags - flag of interrupts status
*
* Returned Value:
* SP_LOCKED - Failure, the spinlock was already locked
* SP_UNLOCKED - Success, the spinlock was successfully locked
*
* Assumptions:
* Not running at the interrupt level.
*
****************************************************************************/
#ifdef CONFIG_SPINLOCK
# define spin_trylock_irqsave_wo_note(l, f) \
({ \
f = up_irq_save(); \
spin_trylock_wo_note(l) ? \
true : ({ up_irq_restore(f); false; }); \
})
#else
# define spin_trylock_irqsave_wo_note(l, f) \
({ \
(void)(l); \
f = up_irq_save(); \
true; \
})
#endif /* CONFIG_SPINLOCK */
/****************************************************************************
* Name: spin_trylock_irqsave
*
* Description:
* Try once to lock the spinlock. Do not wait if the spinlock is already
* locked.
*
* Input Parameters:
* lock - A reference to the spinlock object to lock.
* flags - flag of interrupts status
*
* Returned Value:
* SP_LOCKED - Failure, the spinlock was already locked
* SP_UNLOCKED - Success, the spinlock was successfully locked
*
* Assumptions:
* Not running at the interrupt level.
*
****************************************************************************/
#ifdef CONFIG_SPINLOCK
# define spin_trylock_irqsave(l, f) \
({ \
f = up_irq_save(); \
spin_trylock(l) ? \
true : ({ up_irq_restore(f); false; }); \
})
#else
# define spin_trylock_irqsave(l, f) \
({ \
(void)(l); \
f = up_irq_save(); \
true; \
})
#endif /* CONFIG_SPINLOCK */
/****************************************************************************
* Name: spin_unlock_irqrestore_wo_note
*