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/*
* Wrapper functions for accessing the file_struct fd array.
*/
#ifndef __LINUX_FILE_H
#define __LINUX_FILE_H
extern void __fput(struct file *);
/*
* Check whether the specified task has the fd open. Since the task
* may not have a files_struct, we must test for p->files != NULL.
*/
extern inline struct file * fcheck_task(struct task_struct *p, unsigned int fd)
{
struct file * file = NULL;
if (p->files && fd < p->files->max_fds)
file = p->files->fd[fd];
return file;
}
/*
* Check whether the specified fd has an open file.
*/
extern inline struct file * fcheck(unsigned int fd)
{
struct file * file = NULL;
if (fd < current->files->max_fds)
file = current->files->fd[fd];
return file;
}
extern inline struct file * fget(unsigned int fd)
{
struct file * file = fcheck(fd);
if (file)
file->f_count++;
return file;
}
/*
* Install a file pointer in the fd array.
*/
extern inline void fd_install(unsigned int fd, struct file * file)
{
current->files->fd[fd] = file;
}
/*
* 23/12/1998 Marcin Dalecki <dalecki@cs.net.pl>:
*
* Since those functions where calling other functions, it was compleatly
* bogous to make them all "extern inline".
*
* The removal of this pseudo optimization saved me scandaleous:
*
* 3756 (i386 arch)
*
* precious bytes from my kernel, even without counting all the code compiled
* as module!
*
* I suspect there are many other similar "optimizations" across the
* kernel...
*/
extern void fput(struct file *);
extern void put_filp(struct file *);
#endif /* __LINUX_FILE_H */
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