From 9fd51e9b0ad33a89a83fdbbb66bd20d85f7893fb Mon Sep 17 00:00:00 2001 From: Roland McGrath Date: Fri, 4 Feb 2000 03:21:18 +0000 Subject: Import of Linux 2.2.12 subset (ipv4 stack and related) --- pfinet/linux-src/include/linux/file.h | 71 +++++++++++++++++++++++++++++++++++ 1 file changed, 71 insertions(+) create mode 100644 pfinet/linux-src/include/linux/file.h (limited to 'pfinet/linux-src/include/linux/file.h') diff --git a/pfinet/linux-src/include/linux/file.h b/pfinet/linux-src/include/linux/file.h new file mode 100644 index 00000000..05f388f0 --- /dev/null +++ b/pfinet/linux-src/include/linux/file.h @@ -0,0 +1,71 @@ +/* + * 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 : + * + * 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 *file); +extern void put_filp(struct file *file); + +#endif -- cgit v1.2.3