offtab.h revision 1.2.8.2
1 1.2.8.2 tls /* $NetBSD: offtab.h,v 1.2.8.2 2014/08/20 00:05:05 tls Exp $ */ 2 1.2.8.2 tls 3 1.2.8.2 tls /*- 4 1.2.8.2 tls * Copyright (c) 2014 The NetBSD Foundation, Inc. 5 1.2.8.2 tls * All rights reserved. 6 1.2.8.2 tls * 7 1.2.8.2 tls * This code is derived from software contributed to The NetBSD Foundation 8 1.2.8.2 tls * by Taylor R. Campbell. 9 1.2.8.2 tls * 10 1.2.8.2 tls * Redistribution and use in source and binary forms, with or without 11 1.2.8.2 tls * modification, are permitted provided that the following conditions 12 1.2.8.2 tls * are met: 13 1.2.8.2 tls * 1. Redistributions of source code must retain the above copyright 14 1.2.8.2 tls * notice, this list of conditions and the following disclaimer. 15 1.2.8.2 tls * 2. Redistributions in binary form must reproduce the above copyright 16 1.2.8.2 tls * notice, this list of conditions and the following disclaimer in the 17 1.2.8.2 tls * documentation and/or other materials provided with the distribution. 18 1.2.8.2 tls * 19 1.2.8.2 tls * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 1.2.8.2 tls * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 1.2.8.2 tls * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 1.2.8.2 tls * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 1.2.8.2 tls * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 1.2.8.2 tls * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 1.2.8.2 tls * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 1.2.8.2 tls * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 1.2.8.2 tls * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 1.2.8.2 tls * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 1.2.8.2 tls * POSSIBILITY OF SUCH DAMAGE. 30 1.2.8.2 tls */ 31 1.2.8.2 tls 32 1.2.8.2 tls #ifndef VNDCOMPRESS_OFFTAB_H 33 1.2.8.2 tls #define VNDCOMPRESS_OFFTAB_H 34 1.2.8.2 tls 35 1.2.8.2 tls #include <sys/cdefs.h> 36 1.2.8.2 tls 37 1.2.8.2 tls #include <stdbool.h> 38 1.2.8.2 tls #include <stdint.h> 39 1.2.8.2 tls 40 1.2.8.2 tls struct offtab { 41 1.2.8.2 tls uint32_t ot_n_offsets; 42 1.2.8.2 tls uint32_t ot_window_size; 43 1.2.8.2 tls uint32_t ot_window_start; 44 1.2.8.2 tls uint64_t *ot_window; 45 1.2.8.2 tls uint32_t ot_blkno; 46 1.2.8.2 tls int ot_fd; 47 1.2.8.2 tls off_t ot_fdpos; 48 1.2.8.2 tls void (*ot_report)(const char *, ...) __printflike(1,2); 49 1.2.8.2 tls void (*ot_reportx)(const char *, ...) __printflike(1,2); 50 1.2.8.2 tls enum offtab_mode { 51 1.2.8.2 tls OFFTAB_MODE_NONE, 52 1.2.8.2 tls OFFTAB_MODE_READ, 53 1.2.8.2 tls OFFTAB_MODE_WRITE, 54 1.2.8.2 tls } ot_mode; 55 1.2.8.2 tls }; 56 1.2.8.2 tls 57 1.2.8.2 tls void offtab_init(struct offtab *, uint32_t, uint32_t, int, off_t); 58 1.2.8.2 tls void offtab_destroy(struct offtab *); 59 1.2.8.2 tls 60 1.2.8.2 tls bool offtab_transmogrify_read_to_write(struct offtab *, uint32_t); 61 1.2.8.2 tls 62 1.2.8.2 tls bool offtab_reset_read(struct offtab *, 63 1.2.8.2 tls void (*)(const char *, ...) __printflike(1,2), 64 1.2.8.2 tls void (*)(const char *, ...) __printflike(1,2)); 65 1.2.8.2 tls bool offtab_prepare_get(struct offtab *, uint32_t); 66 1.2.8.2 tls uint64_t offtab_get(struct offtab *, uint32_t); 67 1.2.8.2 tls 68 1.2.8.2 tls void offtab_reset_write(struct offtab *); 69 1.2.8.2 tls void offtab_checkpoint(struct offtab *, uint32_t, int); 70 1.2.8.2 tls #define OFFTAB_CHECKPOINT_SYNC 1 71 1.2.8.2 tls void offtab_prepare_put(struct offtab *, uint32_t); 72 1.2.8.2 tls void offtab_put(struct offtab *, uint32_t, uint64_t); 73 1.2.8.2 tls 74 1.2.8.2 tls #endif /* VNDCOMPRESS_OFFTAB_H */ 75
Indexes created Thu Oct 30 16:09:53 GMT 2025