171 lines
3.2 KiB
C
171 lines
3.2 KiB
C
/*
|
|
* 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 "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 = g_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 = 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;
|
|
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);
|
|
}
|
|
|
|
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 (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);
|
|
g_free(entry);
|
|
}
|
|
|
|
g_free(qlist);
|
|
}
|