splice_from_pipe

函数名称：splice_from_pipe_next - wait for some data to splice from*@pipe: pipe to splice from*@sd: information about the splice operation* Description:* This function will wait for some data and return a positive* value (one) if pipe buffers are available

函数原型：static int splice_from_pipe_next(struct pipe_inode_info *pipe, struct splice_desc *sd)

返回类型：int

参数：

类型	参数	名称
struct pipe_inode_info *	pipe
struct splice_desc *	sd

555

如果signal_pending(当前进程)则返回:负These should never be seen by user programs. To return one of ERESTART** codes, signal_pending() MUST be set. Note that ptrace can observe these* at syscall exit tracing, but they will never be left for the debugged user* process to see.

558

当pipe_empty - Return true if the pipe is empty*@head: The pipe ring head pointer*@tail: The pipe ring tail pointer 循环

559

如果非writers则返回:0

562

如果umber of bytes already spliced 则返回:0

565

如果splice flags 按位与don't block on the pipe splicing (but 则返回:负EAGAIN

568

571

如果d to wake up writer 则

572

wakeup_pipe_writers(pipe)

573

d to wake up writer = false

576

Drop the inode semaphore and wait for a pipe event, atomically

579

返回:1

**调用者**
名称	描述
__splice_from_pipe	__splice_from_pipe - splice data from a pipe to given actor@pipe: pipe to splice from@sd: information to @actor@actor: handler that splices the data Description:* This function does little more than loop over the pipe and call*@actor to do the actual
iter_file_splice_write	r_file_splice_write - splice data from a pipe to a file@pipe: pipe info@out: file to write to@ppos: position in @out@len: number of bytes to splice@flags: splice modifier flags Description:* Will either move or copy pages (determined by @flags

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

函数逻辑报告