projects / OpenSPARC-T2-SAM / blame
| Commit | Line | Data |
|---|---|---|
| 920dae64 AT |
1 | /* |
| 2 | * ========== Copyright Header Begin ========================================== | |
| 3 | * | |
| 4 | * OpenSPARC T2 Processor File: callback.c | |
| 5 | * Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved. | |
| 6 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES. | |
| 7 | * | |
| 8 | * The above named program is free software; you can redistribute it and/or | |
| 9 | * modify it under the terms of the GNU General Public | |
| 10 | * License version 2 as published by the Free Software Foundation. | |
| 11 | * | |
| 12 | * The above named program is distributed in the hope that it will be | |
| 13 | * useful, but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 15 | * General Public License for more details. | |
| 16 | * | |
| 17 | * You should have received a copy of the GNU General Public | |
| 18 | * License along with this work; if not, write to the Free Software | |
| 19 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. | |
| 20 | * | |
| 21 | * ========== Copyright Header End ============================================ | |
| 22 | */ | |
| 23 | /* | |
| 24 | * Copyright 2006 Sun Microsystems, Inc. All rights reserved. | |
| 25 | * Use is subject to license terms. | |
| 26 | */ | |
| 27 | #pragma ident "@(#)callback.c 1.2 06/09/27 SMI" | |
| 28 | ||
| 29 | #include <stdlib.h> | |
| 30 | #include <pthread.h> | |
| 31 | ||
| 32 | #include "list.h" | |
| 33 | #include "allocate.h" | |
| 34 | #include "basics.h" | |
| 35 | #include "callback.h" | |
| 36 | ||
| 37 | typedef struct { | |
| 38 | callback_type_t type; | |
| 39 | cb_func_t *cb_func; | |
| 40 | void *cb_arg; | |
| 41 | } cb_entry_t; | |
| 42 | ||
| 43 | typedef LIST_DEF(cb_list_t, cb_entry_t); | |
| 44 | static cb_list_t cb_list; | |
| 45 | static pthread_mutex_t cb_lock; | |
| 46 | ||
| 47 | void | |
| 48 | callback_fire(callback_type_t type) | |
| 49 | { | |
| 50 | int i; | |
| 51 | ||
| 52 | /* can't grab cb_lock as funcs call callback_delete()... */ | |
| 53 | for (i = 0; i < cb_list.count; i++) { | |
| 54 | cb_entry_t *p; | |
| 55 | ||
| 56 | p = LIST_ENTRY(cb_list, i); | |
| 57 | if (p->type == type) | |
| 58 | (*p->cb_func)(p->cb_arg); | |
| 59 | } | |
| 60 | } | |
| 61 | ||
| 62 | void | |
| 63 | callback_register(callback_type_t type, cb_func_t func, void *arg) | |
| 64 | { | |
| 65 | cb_entry_t *p; | |
| 66 | int i; | |
| 67 | ||
| 68 | pthread_mutex_lock(&cb_lock); | |
| 69 | ||
| 70 | /* Check "free list". */ | |
| 71 | for (i = 0, p = NULL; i < cb_list.count; i++) { | |
| 72 | cb_entry_t *p1; | |
| 73 | p1 = LIST_ENTRY(cb_list, i); | |
| 74 | if (p1->type == CB_None) { | |
| 75 | p = p1; | |
| 76 | break; | |
| 77 | } | |
| 78 | } | |
| 79 | ||
| 80 | /* Allocate a new one? */ | |
| 81 | if (p == NULL) | |
| 82 | p = LIST_ADD(cb_list, cb_entry_t); | |
| 83 | ||
| 84 | p->type = type; | |
| 85 | p->cb_func = func; | |
| 86 | p->cb_arg = arg; | |
| 87 | pthread_mutex_unlock(&cb_lock); | |
| 88 | } | |
| 89 | ||
| 90 | void | |
| 91 | callback_delete(cb_func_t func) | |
| 92 | { | |
| 93 | int i; | |
| 94 | ||
| 95 | pthread_mutex_lock(&cb_lock); | |
| 96 | for (i = 0; i < cb_list.count; i++) { | |
| 97 | cb_entry_t *p; | |
| 98 | ||
| 99 | p = LIST_ENTRY(cb_list, i); | |
| 100 | if (p->cb_func == func) | |
| 101 | p->type = CB_None; /* Onto "free list". */ | |
| 102 | } | |
| 103 | pthread_mutex_unlock(&cb_lock); | |
| 104 | } | |
| 105 | ||
| 106 | void | |
| 107 | callback_init() | |
| 108 | { | |
| 109 | pthread_mutex_init(&cb_lock, NULL); | |
| 110 | } |