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/* $OpenBSD: file.h,v 1.1 2012/11/23 07:03:28 ratchov Exp $ */
/*
* Copyright (c) 2008-2012 Alexandre Ratchov <alex@caoua.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef FILE_H
#define FILE_H
#include <sys/types.h>
struct file;
struct pollfd;
struct timo {
struct timo *next;
unsigned int val; /* time to wait before the callback */
unsigned int set; /* true if the timeout is set */
void (*cb)(void *arg); /* routine to call on expiration */
void *arg; /* argument to give to 'cb' */
};
struct fileops {
char *name;
int (*pollfd)(void *, struct pollfd *);
int (*revents)(void *, struct pollfd *);
/*
* we have to handle POLLIN and POLLOUT events
* in separate handles, since handling POLLIN can
* close the file, and continuing (to handle POLLOUT)
* would make use of the free()'ed file structure
*/
void (*in)(void *);
void (*out)(void *);
void (*hup)(void *);
};
struct file {
struct file *next; /* next in file_list */
struct pollfd *pfd; /* arg to poll(2) syscall */
struct fileops *ops; /* event handlers */
void *arg; /* argument to event handlers */
#define FILE_INIT 0 /* ready */
#define FILE_ZOMB 1 /* closed, but not free()d yet */
unsigned int state; /* one of above */
unsigned int nfds; /* max number of descriptors */
char *name; /* for debug purposes */
};
extern struct file *file_list;
extern int file_slowaccept;
#ifdef DEBUG
extern long long file_wtime, file_utime;
#endif
void timo_set(struct timo *, void (*)(void *), void *);
void timo_add(struct timo *, unsigned int);
void timo_del(struct timo *);
void filelist_init(void);
void filelist_done(void);
void filelist_unlisten(void);
struct file *file_new(struct fileops *, void *, char *, unsigned int);
void file_del(struct file *);
void file_log(struct file *);
int file_poll(void);
#endif /* !defined(FILE_H) */
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