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author | David 'Digit' Turner <digit@android.com> | 2010-05-10 18:48:35 -0700 |
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committer | David 'Digit' Turner <digit@android.com> | 2010-05-11 17:10:19 -0700 |
commit | 2910f183ddd5286911bc1e3499ea93cb57de8b75 (patch) | |
tree | 43cfd4b9a6697496732722ff7f2fb66d5782597c /qlist.c | |
parent | 0119362f0d74ca74f3ea743f6e0e527a9edcc474 (diff) | |
download | external_qemu-2910f183ddd5286911bc1e3499ea93cb57de8b75.zip external_qemu-2910f183ddd5286911bc1e3499ea93cb57de8b75.tar.gz external_qemu-2910f183ddd5286911bc1e3499ea93cb57de8b75.tar.bz2 |
Upstream: Misc integration - includes qobject.h and related sources
Change-Id: Idfa93ab5c67c95a3bc1869eeaf3a84a75fe24cd6
Diffstat (limited to 'qlist.c')
-rw-r--r-- | qlist.c | 156 |
1 files changed, 156 insertions, 0 deletions
@@ -0,0 +1,156 @@ +/* + * QList data type. + * + * Copyright (C) 2009 Red Hat Inc. + * + * Authors: + * Luiz Capitulino <lcapitulino@redhat.com> + * + * This work is licensed under the terms of the GNU GPL, version 2. See + * the COPYING file in the top-level directory. + */ +#include "qlist.h" +#include "qobject.h" +#include "qemu-queue.h" +#include "qemu-common.h" + +static void qlist_destroy_obj(QObject *obj); + +static const QType qlist_type = { + .code = QTYPE_QLIST, + .destroy = qlist_destroy_obj, +}; + +/** + * qlist_new(): Create a new QList + * + * Return strong reference. + */ +QList *qlist_new(void) +{ + QList *qlist; + + qlist = qemu_malloc(sizeof(*qlist)); + QTAILQ_INIT(&qlist->head); + QOBJECT_INIT(qlist, &qlist_type); + + return qlist; +} + +static void qlist_copy_elem(QObject *obj, void *opaque) +{ + QList *dst = opaque; + + qobject_incref(obj); + qlist_append_obj(dst, obj); +} + +QList *qlist_copy(QList *src) +{ + QList *dst = qlist_new(); + + qlist_iter(src, qlist_copy_elem, dst); + + return dst; +} + +/** + * qlist_append_obj(): Append an QObject into QList + * + * NOTE: ownership of 'value' is transferred to the QList + */ +void qlist_append_obj(QList *qlist, QObject *value) +{ + QListEntry *entry; + + entry = qemu_malloc(sizeof(*entry)); + entry->value = value; + + QTAILQ_INSERT_TAIL(&qlist->head, entry, next); +} + +/** + * qlist_iter(): Iterate over all the list's stored values. + * + * This function allows the user to provide an iterator, which will be + * called for each stored value in the list. + */ +void qlist_iter(const QList *qlist, + void (*iter)(QObject *obj, void *opaque), void *opaque) +{ + QListEntry *entry; + + QTAILQ_FOREACH(entry, &qlist->head, next) + iter(entry->value, opaque); +} + +QObject *qlist_pop(QList *qlist) +{ + QListEntry *entry; + QObject *ret; + + if (qlist == NULL || QTAILQ_EMPTY(&qlist->head)) { + return NULL; + } + + entry = QTAILQ_FIRST(&qlist->head); + QTAILQ_REMOVE(&qlist->head, entry, next); + + ret = entry->value; + qemu_free(entry); + + return ret; +} + +QObject *qlist_peek(QList *qlist) +{ + QListEntry *entry; + QObject *ret; + + if (qlist == NULL || QTAILQ_EMPTY(&qlist->head)) { + return NULL; + } + + entry = QTAILQ_FIRST(&qlist->head); + + ret = entry->value; + + return ret; +} + +int qlist_empty(const QList *qlist) +{ + return QTAILQ_EMPTY(&qlist->head); +} + +/** + * qobject_to_qlist(): Convert a QObject into a QList + */ +QList *qobject_to_qlist(const QObject *obj) +{ + if (qobject_type(obj) != QTYPE_QLIST) { + return NULL; + } + + return container_of(obj, QList, base); +} + +/** + * qlist_destroy_obj(): Free all the memory allocated by a QList + */ +static void qlist_destroy_obj(QObject *obj) +{ + QList *qlist; + QListEntry *entry, *next_entry; + + assert(obj != NULL); + qlist = qobject_to_qlist(obj); + + QTAILQ_FOREACH_SAFE(entry, &qlist->head, next, next_entry) { + QTAILQ_REMOVE(&qlist->head, entry, next); + qobject_decref(entry->value); + qemu_free(entry); + } + + qemu_free(qlist); +} |