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/*
* QList Module
*
* Copyright (C) 2009 Red Hat Inc.
*
* Authors:
* Luiz Capitulino <lcapitulino@redhat.com>
*
* This work is licensed under the terms of the GNU LGPL, version 2.1 or later.
* See the COPYING.LIB file in the top-level directory.
*/
#include "qemu/osdep.h"
#include "qapi/qmp/qlist.h"
#include "qapi/qmp/qobject.h"
#include "qemu/queue.h"
#include "qemu-common.h"
/**
* qlist_new(): Create a new QList
*
* Return strong reference.
*/
QList *qlist_new(void)
{
QList *qlist;
qlist = g_malloc(sizeof(*qlist));
qobject_init(QOBJECT(qlist), QTYPE_QLIST);
QTAILQ_INIT(&qlist->head);
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 = g_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;
g_free(entry);
return ret;
}
QObject *qlist_peek(QList *qlist)
{
QListEntry *entry;
if (qlist == NULL || QTAILQ_EMPTY(&qlist->head)) {
return NULL;
}
entry = QTAILQ_FIRST(&qlist->head);
return entry->value;
}
int qlist_empty(const QList *qlist)
{
return QTAILQ_EMPTY(&qlist->head);
}
static void qlist_size_iter(QObject *obj, void *opaque)
{
size_t *count = opaque;
(*count)++;
}
size_t qlist_size(const QList *qlist)
{
size_t count = 0;
qlist_iter(qlist, qlist_size_iter, &count);
return count;
}
/**
* qobject_to_qlist(): Convert a QObject into a QList
*/
QList *qobject_to_qlist(const QObject *obj)
{
if (!obj || qobject_type(obj) != QTYPE_QLIST) {
return NULL;
}
return container_of(obj, QList, base);
}
/**
* qlist_is_equal(): Test whether the two QLists are equal
*
* In order to be considered equal, the respective two objects at each
* index of the two lists have to compare equal (regarding
* qobject_is_equal()), and both lists have to have the same number of
* elements.
* That means both lists have to contain equal objects in equal order.
*/
bool qlist_is_equal(const QObject *x, const QObject *y)
{
const QList *list_x = qobject_to_qlist(x);
const QList *list_y = qobject_to_qlist(y);
const QListEntry *entry_x, *entry_y;
entry_x = qlist_first(list_x);
entry_y = qlist_first(list_y);
while (entry_x && entry_y) {
if (!qobject_is_equal(qlist_entry_obj(entry_x),
qlist_entry_obj(entry_y)))
{
return false;
}
entry_x = qlist_next(entry_x);
entry_y = qlist_next(entry_y);
}
return !entry_x && !entry_y;
}
/**
* qlist_destroy_obj(): Free all the memory allocated by a QList
*/
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);
g_free(entry);
}
g_free(qlist);
}
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