Function report |
Source Code:kernel\locking\semaphore.c |
Create Date:2022-07-28 09:47:48 |
Last Modify:2020-03-12 14:18:49 | Copyright©Brick |
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Annotation kernel can get tool activity | Download SCCT | Chinese |
Name:Because this function is inlined, the 'state' parameter will be* constant, and thus optimised away by the compiler. Likewise the* 'timeout' parameter for the cases without timeouts.
Proto:static inline int __sched __down_common(struct semaphore *sem, long state, long timeout)
Type:int
Parameter:
Type | Parameter | Name |
---|---|---|
struct semaphore * | sem | |
long | state | |
long | timeout |
210 | task = current process |
211 | up = false |
213 | cycle |
214 | If signal_pending_state(state, current process) Then Go to interrupted |
216 | If Value for the false possibility is greater at compile time(timeout <= 0) Then Go to timed_out |
219 | raw_spin_unlock_irq( & lock) |
220 | timeout = schedule_timeout - sleep until timeout*@timeout: timeout value in jiffies* Make the current task sleep until @timeout jiffies have* elapsed |
221 | raw_spin_lock_irq( & lock) |
222 | If up Then Return 0 |
226 | timed_out : |
228 | Return -ETIME |
230 | interrupted : |
232 | Return -EINTR |
Name | Describe |
---|---|
__down | |
__down_interruptible | |
__down_killable | |
__down_timeout |
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