Luiz Capitulino | a6fd08e | 2009-10-07 13:41:48 -0300 | [diff] [blame] | 1 | /* |
Luiz Capitulino | 41836a9 | 2010-05-12 16:34:42 -0300 | [diff] [blame] | 2 | * QList Module |
Luiz Capitulino | a6fd08e | 2009-10-07 13:41:48 -0300 | [diff] [blame] | 3 | * |
| 4 | * Copyright (C) 2009 Red Hat Inc. |
| 5 | * |
| 6 | * Authors: |
| 7 | * Luiz Capitulino <lcapitulino@redhat.com> |
| 8 | * |
Luiz Capitulino | 41836a9 | 2010-05-12 16:34:42 -0300 | [diff] [blame] | 9 | * This work is licensed under the terms of the GNU LGPL, version 2.1 or later. |
| 10 | * See the COPYING.LIB file in the top-level directory. |
Luiz Capitulino | a6fd08e | 2009-10-07 13:41:48 -0300 | [diff] [blame] | 11 | */ |
Luiz Capitulino | 41836a9 | 2010-05-12 16:34:42 -0300 | [diff] [blame] | 12 | |
Luiz Capitulino | a6fd08e | 2009-10-07 13:41:48 -0300 | [diff] [blame] | 13 | #include "qlist.h" |
| 14 | #include "qobject.h" |
| 15 | #include "qemu-queue.h" |
| 16 | #include "qemu-common.h" |
| 17 | |
| 18 | static void qlist_destroy_obj(QObject *obj); |
| 19 | |
| 20 | static const QType qlist_type = { |
| 21 | .code = QTYPE_QLIST, |
| 22 | .destroy = qlist_destroy_obj, |
| 23 | }; |
| 24 | |
| 25 | /** |
| 26 | * qlist_new(): Create a new QList |
| 27 | * |
| 28 | * Return strong reference. |
| 29 | */ |
| 30 | QList *qlist_new(void) |
| 31 | { |
| 32 | QList *qlist; |
| 33 | |
| 34 | qlist = qemu_malloc(sizeof(*qlist)); |
| 35 | QTAILQ_INIT(&qlist->head); |
| 36 | QOBJECT_INIT(qlist, &qlist_type); |
| 37 | |
| 38 | return qlist; |
| 39 | } |
| 40 | |
Anthony Liguori | 033815f | 2009-11-11 10:48:51 -0600 | [diff] [blame] | 41 | static void qlist_copy_elem(QObject *obj, void *opaque) |
| 42 | { |
| 43 | QList *dst = opaque; |
| 44 | |
| 45 | qobject_incref(obj); |
| 46 | qlist_append_obj(dst, obj); |
| 47 | } |
| 48 | |
| 49 | QList *qlist_copy(QList *src) |
| 50 | { |
| 51 | QList *dst = qlist_new(); |
| 52 | |
| 53 | qlist_iter(src, qlist_copy_elem, dst); |
| 54 | |
| 55 | return dst; |
| 56 | } |
| 57 | |
Luiz Capitulino | a6fd08e | 2009-10-07 13:41:48 -0300 | [diff] [blame] | 58 | /** |
| 59 | * qlist_append_obj(): Append an QObject into QList |
| 60 | * |
| 61 | * NOTE: ownership of 'value' is transferred to the QList |
| 62 | */ |
| 63 | void qlist_append_obj(QList *qlist, QObject *value) |
| 64 | { |
| 65 | QListEntry *entry; |
| 66 | |
| 67 | entry = qemu_malloc(sizeof(*entry)); |
| 68 | entry->value = value; |
| 69 | |
| 70 | QTAILQ_INSERT_TAIL(&qlist->head, entry, next); |
| 71 | } |
| 72 | |
| 73 | /** |
| 74 | * qlist_iter(): Iterate over all the list's stored values. |
| 75 | * |
| 76 | * This function allows the user to provide an iterator, which will be |
| 77 | * called for each stored value in the list. |
| 78 | */ |
| 79 | void qlist_iter(const QList *qlist, |
| 80 | void (*iter)(QObject *obj, void *opaque), void *opaque) |
| 81 | { |
| 82 | QListEntry *entry; |
| 83 | |
| 84 | QTAILQ_FOREACH(entry, &qlist->head, next) |
| 85 | iter(entry->value, opaque); |
| 86 | } |
| 87 | |
Anthony Liguori | 033815f | 2009-11-11 10:48:51 -0600 | [diff] [blame] | 88 | QObject *qlist_pop(QList *qlist) |
| 89 | { |
| 90 | QListEntry *entry; |
| 91 | QObject *ret; |
| 92 | |
| 93 | if (qlist == NULL || QTAILQ_EMPTY(&qlist->head)) { |
| 94 | return NULL; |
| 95 | } |
| 96 | |
| 97 | entry = QTAILQ_FIRST(&qlist->head); |
| 98 | QTAILQ_REMOVE(&qlist->head, entry, next); |
| 99 | |
| 100 | ret = entry->value; |
| 101 | qemu_free(entry); |
| 102 | |
| 103 | return ret; |
| 104 | } |
| 105 | |
| 106 | QObject *qlist_peek(QList *qlist) |
| 107 | { |
| 108 | QListEntry *entry; |
| 109 | QObject *ret; |
| 110 | |
| 111 | if (qlist == NULL || QTAILQ_EMPTY(&qlist->head)) { |
| 112 | return NULL; |
| 113 | } |
| 114 | |
| 115 | entry = QTAILQ_FIRST(&qlist->head); |
| 116 | |
| 117 | ret = entry->value; |
| 118 | |
| 119 | return ret; |
| 120 | } |
| 121 | |
| 122 | int qlist_empty(const QList *qlist) |
| 123 | { |
| 124 | return QTAILQ_EMPTY(&qlist->head); |
| 125 | } |
| 126 | |
Luiz Capitulino | a6fd08e | 2009-10-07 13:41:48 -0300 | [diff] [blame] | 127 | /** |
| 128 | * qobject_to_qlist(): Convert a QObject into a QList |
| 129 | */ |
| 130 | QList *qobject_to_qlist(const QObject *obj) |
| 131 | { |
| 132 | if (qobject_type(obj) != QTYPE_QLIST) { |
| 133 | return NULL; |
| 134 | } |
| 135 | |
| 136 | return container_of(obj, QList, base); |
| 137 | } |
| 138 | |
| 139 | /** |
| 140 | * qlist_destroy_obj(): Free all the memory allocated by a QList |
| 141 | */ |
| 142 | static void qlist_destroy_obj(QObject *obj) |
| 143 | { |
| 144 | QList *qlist; |
| 145 | QListEntry *entry, *next_entry; |
| 146 | |
| 147 | assert(obj != NULL); |
| 148 | qlist = qobject_to_qlist(obj); |
| 149 | |
| 150 | QTAILQ_FOREACH_SAFE(entry, &qlist->head, next, next_entry) { |
| 151 | QTAILQ_REMOVE(&qlist->head, entry, next); |
| 152 | qobject_decref(entry->value); |
| 153 | qemu_free(entry); |
| 154 | } |
| 155 | |
| 156 | qemu_free(qlist); |
| 157 | } |