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/*

 * Wrapper functions for accessing the file_struct fd array.

 */

#ifndef __LINUX_FILE_H

#define __LINUX_FILE_H

extern void FASTCALL(fput(struct file *));

extern struct file * FASTCALL(fget(unsigned int fd));

static inline int get_close_on_exec(unsigned int fd)

{

        struct files_struct *files = current->files;

        int res;

        read_lock(&files->file_lock);

        res = FD_ISSET(fd, files->close_on_exec);

        read_unlock(&files->file_lock);

        return res;

}

static inline void set_close_on_exec(unsigned int fd, int flag)

{

        struct files_struct *files = current->files;

        write_lock(&files->file_lock);

        if (flag)

                FD_SET(fd, files->close_on_exec);

        else

                FD_CLR(fd, files->close_on_exec);

        write_unlock(&files->file_lock);

}

static inline struct file * fcheck_files(struct files_struct *files, unsigned int fd)

{

        struct file * file = NULL;

        if (fd < files->max_fds)

                file = files->fd[fd];

        return file;

}

/*

 * Check whether the specified fd has an open file.

 */

static inline struct file * fcheck(unsigned int fd)

{

        struct file * file = NULL;

        struct files_struct *files = current->files;

        if (fd < files->max_fds)

                file = files->fd[fd];

        return file;

}

extern void put_filp(struct file *);

extern int get_unused_fd(void);

static inline void __put_unused_fd(struct files_struct *files, unsigned int fd)

{

        FD_CLR(fd, files->open_fds);

        if (fd < files->next_fd)

                files->next_fd = fd;

}

static inline void put_unused_fd(unsigned int fd)

{

        struct files_struct *files = current->files;

        write_lock(&files->file_lock);

        __put_unused_fd(files, fd);

        write_unlock(&files->file_lock);

}

void fd_install(unsigned int fd, struct file * file);

void put_files_struct(struct files_struct *fs);

#endif /* __LINUX_FILE_H */