expand_files

函数名称：Expand files.* This function will expand the file structures, if the requested size exceeds* the current capacity and there is room for expansion.* Return <0 error code on error; 0 when nothing done; 1 when files were

函数原型：static int expand_files(struct files_struct *files, unsigned int nr)__releases(files->file_lock) __acquires(files->file_lock)

返回类型：int

参数：

类型	参数	名称
struct files_struct *	files
unsigned int	nr

198

expanded等于0

200

repeat :

201

fdt等于files_fdtable(files)

204

如果nr小于max_fds则返回:expanded

208

如果nr大于等于sysctl_nr_open则返回:负EMFILE

211

如果此条件成立可能性小(为编译器优化)(resize_in_progress)则

212

自旋锁解锁

213

expanded等于1

214

wait_event - sleep until a condition gets true*@wq_head: the waitqueue to wait on*@condition: a C expression for the event to wait for* The process is put to sleep (TASK_UNINTERRUPTIBLE) until the*@condition evaluates to true(resize_wait, !resize_in_progress)

215

加自旋锁

216

转到:repeat

220

resize_in_progress = true

221

expanded等于Expand the file descriptor table.* This function will allocate a new fdtable and both fd array and fdset, of* the given size.* Return <0 error code on error; 1 on successful completion.

222

resize_in_progress = false

224

wake_up_all( & resize_wait)

225

返回:expanded

**调用者**
名称	描述
__alloc_fd	allocate a file descriptor, mark it busy.
replace_fd
ksys_dup3

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