函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:include\linux\ptr_ring.h Create Date:2022-07-27 14:40:48
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：Must only be called after __ptr_ring_peek returned !NULL

函数原型：static inline void __ptr_ring_discard_one(struct ptr_ring *r)

返回类型：void

参数：

类型参数名称
struct ptr_ring *r
263  consumer_head等于consumer_head
264  head等于consumer_head自加
271  如果此条件成立可能性小(为编译器优化)(consumer_head - next entry to invalidate >= number of entries to consume in a batch || consumer_head >= Read-only by both the producer and the consumer )则
278  当此条件成立可能性大(为编译器优化)(head >= next entry to invalidate )循环
279  queue[head--] = NULL
280  next entry to invalidate 等于consumer_head
282  如果此条件成立可能性小(为编译器优化)(consumer_head >= Read-only by both the producer and the consumer )则
283  consumer_head等于0
284  next entry to invalidate 等于0
287  WRITE_ONCE(consumer_head, consumer_head)
调用者
名称描述
__ptr_ring_consume