projects / blktrace.git / blame
| Commit | Line | Data |
|---|---|---|
| 63eba147 JA |
1 | /* |
| 2 | * blktrace output analysis: generate a timeline & gather statistics | |
| 3 | * | |
| 4 | * Copyright (C) 2006 Alan D. Brunelle <Alan.Brunelle@hp.com> | |
| 5 | * | |
| 6 | * This program is free software; you can redistribute it and/or modify | |
| 7 | * it under the terms of the GNU General Public License as published by | |
| 8 | * the Free Software Foundation; either version 2 of the License, or | |
| 9 | * (at your option) any later version. | |
| 10 | * | |
| 11 | * This program is distributed in the hope that it will be useful, | |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 14 | * GNU General Public License for more details. | |
| 15 | * | |
| 16 | * You should have received a copy of the GNU General Public License | |
| 17 | * along with this program; if not, write to the Free Software | |
| 18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
| 19 | * | |
| 20 | */ | |
| 21 | #include "globals.h" | |
| 22 | ||
| 23 | struct cy_list { | |
| 24 | struct list_head head; | |
| 25 | struct list_head list; | |
| 26 | }; | |
| 27 | ||
| 28 | struct cy_list *pending_cys; | |
| 29 | ||
| 30 | static inline void __rem_cy(struct io_list *iolp) | |
| 31 | { | |
| 32 | io_unlink(&iolp->iop); | |
| 33 | if (--iolp->cy_users == 0) { | |
| 34 | LIST_DEL(&iolp->head); | |
| 35 | free(iolp); | |
| 36 | } | |
| 37 | } | |
| 38 | ||
| 39 | void rem_c(struct io *iop) | |
| 40 | { | |
| 41 | struct list_head *p, *q; | |
| 42 | struct io_list *iolp; | |
| 43 | ||
| 44 | ASSERT(iop->type == IOP_C); | |
| 45 | ||
| 46 | list_for_each_safe(p, q, &pending_cys->list) { | |
| 47 | iolp = list_entry(p, struct io_list, head); | |
| 48 | ||
| 49 | if (iolp->iop == iop) { | |
| 50 | __rem_cy(iolp); | |
| 51 | break; | |
| 52 | } | |
| 53 | } | |
| 54 | } | |
| 55 | ||
| 56 | void run_cy_list(struct list_head *list) | |
| 57 | { | |
| 58 | struct list_head *p, *q; | |
| 59 | struct io_list *iolp; | |
| 60 | ||
| 61 | list_for_each_safe(p, q, list) { | |
| 62 | iolp = list_entry(p, struct io_list, head); | |
| 63 | traverse(iolp->iop); | |
| 64 | __rem_cy(iolp); | |
| 65 | } | |
| 66 | } | |
| 67 | ||
| 68 | void add_cy(struct io *iop) | |
| 69 | { | |
| 70 | struct io_list *iolp = malloc(sizeof(*iolp)); | |
| 71 | ||
| 72 | ASSERT(iop->type == IOP_C || iop->type == IOP_Y); | |
| 73 | ||
| 74 | iolp->cy_users = 1; | |
| 75 | io_link(&iolp->iop, iop); | |
| 76 | ||
| 77 | list_add_tail(&iolp->head, &pending_cys->list); | |
| 78 | if (pending_xs == 0) | |
| 79 | run_cy_list(&pending_cys->list); | |
| 80 | } | |
| 81 | ||
| 82 | void cy_init(void) | |
| 83 | { | |
| 84 | pending_cys = zmalloc(sizeof(*pending_cys)); | |
| 85 | INIT_LIST_HEAD(&pending_cys->list); | |
| 86 | } | |
| 87 | ||
| 88 | void cy_shutdown(void) | |
| 89 | { | |
| 90 | ASSERT(list_empty(&pending_cys->list)); | |
| 91 | free(pending_cys); | |
| 92 | } |