pipe_occupancy

函数名称：pipe_occupancy - Return number of slots used in the pipe*@head: The pipe ring head pointer*@tail: The pipe ring tail pointer

函数原型：static inline unsigned int pipe_occupancy(unsigned int head, unsigned int tail)

返回类型：unsigned int

参数：

类型	参数	名称
unsigned int	head
unsigned int	tail

126

返回:head减tail

**调用者**
名称	描述
sanity
pipe_set_size	Allocate a new array of pipe buffers and copy the info over. Returns the* pipe size if successful, or return -ERROR on error.
pipe_to_sendpage	Send 'sd->len' bytes to socket from 'sd->file' at position 'sd->pos'* using sendpage(). Return the number of bytes sent.
splice_direct_to_actor	splice_direct_to_actor - splices data directly between two non-pipes@in: file to splice from@sd: actor information on where to splice to@actor: handles the data splicing Description:* This is a special case helper to splice directly between two
do_splice	Determine where to splice to/from.
pipe_full	pipe_full - Return true if the pipe is full@head: The pipe ring head pointer@tail: The pipe ring tail pointer*@limit: The maximum amount of slots available.
pipe_space_for_user	pipe_space_for_user - Return number of slots available to userspace@head: The pipe ring head pointer@tail: The pipe ring tail pointer*@pipe: The pipe info structure

源代码转换工具开放的插件接口	X
支持：c/c++/esqlc/java Oracle/Informix/Mysql 插件可实现：逻辑报告代码生成和批量转换代码