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Annotation of src/usr.bin/sndiod/file.h, Revision 1.6

1.6     ! jsg         1: /*     $OpenBSD: file.h,v 1.5 2016/01/08 16:17:31 ratchov Exp $        */
1.1       ratchov     2: /*
                      3:  * Copyright (c) 2008-2012 Alexandre Ratchov <alex@caoua.org>
                      4:  *
                      5:  * Permission to use, copy, modify, and distribute this software for any
                      6:  * purpose with or without fee is hereby granted, provided that the above
                      7:  * copyright notice and this permission notice appear in all copies.
                      8:  *
                      9:  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
                     10:  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
                     11:  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
                     12:  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
                     13:  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
                     14:  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
                     15:  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
                     16:  */
                     17: #ifndef FILE_H
                     18: #define FILE_H
                     19:
                     20: #include <sys/types.h>
                     21:
                     22: struct file;
                     23: struct pollfd;
                     24:
                     25: struct timo {
                     26:        struct timo *next;
                     27:        unsigned int val;               /* time to wait before the callback */
                     28:        unsigned int set;               /* true if the timeout is set */
                     29:        void (*cb)(void *arg);          /* routine to call on expiration */
                     30:        void *arg;                      /* argument to give to 'cb' */
                     31: };
                     32:
                     33: struct fileops {
                     34:        char *name;
                     35:        int (*pollfd)(void *, struct pollfd *);
                     36:        int (*revents)(void *, struct pollfd *);
1.5       ratchov    37:        /*
1.1       ratchov    38:         * we have to handle POLLIN and POLLOUT events
                     39:         * in separate handles, since handling POLLIN can
                     40:         * close the file, and continuing (to handle POLLOUT)
                     41:         * would make use of the free()'ed file structure
                     42:         */
                     43:        void (*in)(void *);
                     44:        void (*out)(void *);
                     45:        void (*hup)(void *);
                     46: };
                     47:
                     48: struct file {
                     49:        struct file *next;              /* next in file_list */
                     50:        struct fileops *ops;            /* event handlers */
                     51:        void *arg;                      /* argument to event handlers */
                     52: #define FILE_INIT      0               /* ready */
                     53: #define FILE_ZOMB      1               /* closed, but not free()d yet */
                     54:        unsigned int state;             /* one of above */
1.5       ratchov    55:        unsigned int max_nfds;          /* max number of descriptors */
1.4       ratchov    56:        unsigned int nfds;              /* number of descriptors polled */
1.1       ratchov    57:        char *name;                     /* for debug purposes */
                     58: };
                     59:
                     60: extern struct file *file_list;
                     61: extern int file_slowaccept;
                     62:
                     63: #ifdef DEBUG
                     64: extern long long file_wtime, file_utime;
                     65: #endif
                     66:
                     67: void timo_set(struct timo *, void (*)(void *), void *);
                     68: void timo_add(struct timo *, unsigned int);
                     69: void timo_del(struct timo *);
                     70:
                     71: void filelist_init(void);
                     72: void filelist_done(void);
                     73:
                     74: struct file *file_new(struct fileops *, void *, char *, unsigned int);
                     75: void file_del(struct file *);
                     76: void file_log(struct file *);
                     77:
                     78: int file_poll(void);
                     79:
                     80: #endif /* !defined(FILE_H) */