Function report |
Source Code:ipc\sem.c |
Create Date:2022-07-28 16:43:23 |
Last Modify:2020-03-12 14:18:49 | Copyright©Brick |
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Name:Enter the mode suitable for non-simple operations:* Caller must own sem_perm.lock.
Proto:static void complexmode_enter(struct sem_array *sma)
Type:void
Parameter:
Type | Parameter | Name |
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struct sem_array * | sma |
316 | If >0: global lock required > 0 Then |
322 | >0: global lock required = Switching from the mode suitable for simple ops* to the mode for complex ops is costly. Therefore:* use some hysteresis |
323 | Return |
325 | >0: global lock required = Switching from the mode suitable for simple ops* to the mode for complex ops is costly. Therefore:* use some hysteresis |
327 | When i < . of semaphores in array cycle |
Name | Describe |
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sem_lock | If the request contains only one semaphore operation, and there are* no complex transactions pending, lock only the semaphore involved |
sysvipc_sem_proc_show |
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