Function report

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:ipc\sem.c Create Date:2022-07-28 16:43:58
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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Name:do_smart_wakeup_zero - wakeup all wait for zero tasks*@sma: semaphore array*@sops: operations that were performed*@nsops: number of operations*@wake_q: lockless wake-queue head* Checks all required queue for wait-for-zero operations, based

Proto:static int do_smart_wakeup_zero(struct sem_array *sma, struct sembuf *sops, int nsops, struct wake_q_head *wake_q)

Type:int

Parameter:

TypeParameterName
struct sem_array *sma
struct sembuf *sops
intnsops
struct wake_q_head *wake_q
878  semop_completed = 0
879  got_zero = 0
882  If sops Then
883  When i < nsops cycle
884  num = semaphore index in array
886  If current value == 0 Then
891  Else
896  When i < . of semaphores in array cycle
897  If current value == 0 Then
907  If got_zero Then semop_completed |= wake_const_ops - wake up non-alter tasks*@sma: semaphore array.*@semnum: semaphore that was modified.*@wake_q: lockless wake-queue head.* wake_const_ops must be called after a semaphore in a semaphore array* was set to 0
910  Return semop_completed
Caller
NameDescribe
update_queuepdate_queue - look for tasks that can be completed.*@sma: semaphore array.*@semnum: semaphore that was modified.*@wake_q: lockless wake-queue head.* update_queue must be called after a semaphore in a semaphore array* was modified
do_smart_updatedo_smart_update - optimized update_queue*@sma: semaphore array*@sops: operations that were performed*@nsops: number of operations*@otime: force setting otime*@wake_q: lockless wake-queue head* do_smart_update() does the required calls to update_queue and