TaiJuWu commented on code in PR #10776: URL: https://github.com/apache/nuttx/pull/10776#discussion_r1349168967
########## include/nuttx/spinlock.h: ########## @@ -449,4 +453,98 @@ void spin_unlock_irqrestore_wo_note(FAR spinlock_t *lock, irqstate_t flags); # define spin_unlock_irqrestore_wo_note(l, f) up_irq_restore(f) #endif +#if defined(CONFIG_RW_SPINLOCK) + +/**************************************************************************** + * Name: read_lock + * + * Description: + * If this CPU does not already hold the spinlock, then loop until the + * spinlock is successfully locked. + * + * This implementation is non-reentrant and set a bit of lock. + * + * The priority of reader is higher than writter if a reader hold the + * lock, a new reader can get its lock but writer can't get this lock. + * + * Input Parameters: + * lock - A reference to the spinlock object to lock. + * + * Returned Value: + * None. When the function returns, the spinlock was successfully locked + * by this CPU. + * + * Assumptions: + * Not running at the interrupt level. + * + ****************************************************************************/ + +void read_lock(FAR volatile rwlock_t *lock); + +/**************************************************************************** + * Name: read_unlock + * + * Description: + * Release a bit on a non-reentrant spinlock. + * + * Input Parameters: + * lock - A reference to the spinlock object to unlock. + * + * Returned Value: + * None. + * + * Assumptions: + * Not running at the interrupt level. + * + ****************************************************************************/ + +void read_unlock(FAR volatile rwlock_t *lock); + +/**************************************************************************** + * Name: write_lock + * + * Description: + * If this CPU does not already hold the spinlock, then loop until the + * spinlock is successfully locked. + * + * This implementation is non-reentrant and set all bit on lock to avoid + * readers and writers. + * + * The priority of reader is higher than writter if a reader hold the + * lock, a new reader can get its lock but writer can't get this lock. + * + * Input Parameters: + * lock - A reference to the spinlock object to lock. + * + * Returned Value: + * None. When the function returns, the spinlock was successfully locked + * by this CPU. + * + * Assumptions: + * Not running at the interrupt level. + * + ****************************************************************************/ + +void write_lock(FAR volatile rwlock_t *lock); Review Comment: Done. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: commits-unsubscr...@nuttx.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
