3d3eacaecc
By moving the base fields to a QObjectBase_, QObject can be a type which also has a 'base' field. This allows writing a generic QOBJECT() macro that will work with any QObject type, including QObject itself. The container_of() macro ensures that the object to cast has a QObjectBase_ base field, giving some type safety guarantees. QObject must have no members but QObjectBase_ base, or else QOBJECT() breaks. QObjectBase_ is not a typedef and uses a trailing underscore to make it obvious it is not for normal use and to avoid potential abuse. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Message-Id: <20180419150145.24795-3-marcandre.lureau@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
70 lines
1.8 KiB
C
70 lines
1.8 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.
|
|
*/
|
|
|
|
#ifndef QLIST_H
|
|
#define QLIST_H
|
|
|
|
#include "qapi/qmp/qobject.h"
|
|
#include "qemu/queue.h"
|
|
|
|
typedef struct QListEntry {
|
|
QObject *value;
|
|
QTAILQ_ENTRY(QListEntry) next;
|
|
} QListEntry;
|
|
|
|
struct QList {
|
|
struct QObjectBase_ base;
|
|
QTAILQ_HEAD(,QListEntry) head;
|
|
};
|
|
|
|
#define qlist_append(qlist, obj) \
|
|
qlist_append_obj(qlist, QOBJECT(obj))
|
|
|
|
void qlist_append_bool(QList *qlist, bool value);
|
|
void qlist_append_int(QList *qlist, int64_t value);
|
|
void qlist_append_null(QList *qlist);
|
|
void qlist_append_str(QList *qlist, const char *value);
|
|
|
|
#define QLIST_FOREACH_ENTRY(qlist, var) \
|
|
for ((var) = ((qlist)->head.tqh_first); \
|
|
(var); \
|
|
(var) = ((var)->next.tqe_next))
|
|
|
|
static inline QObject *qlist_entry_obj(const QListEntry *entry)
|
|
{
|
|
return entry->value;
|
|
}
|
|
|
|
QList *qlist_new(void);
|
|
QList *qlist_copy(QList *src);
|
|
void qlist_append_obj(QList *qlist, QObject *obj);
|
|
void qlist_iter(const QList *qlist,
|
|
void (*iter)(QObject *obj, void *opaque), void *opaque);
|
|
QObject *qlist_pop(QList *qlist);
|
|
QObject *qlist_peek(QList *qlist);
|
|
int qlist_empty(const QList *qlist);
|
|
size_t qlist_size(const QList *qlist);
|
|
bool qlist_is_equal(const QObject *x, const QObject *y);
|
|
void qlist_destroy_obj(QObject *obj);
|
|
|
|
static inline const QListEntry *qlist_first(const QList *qlist)
|
|
{
|
|
return QTAILQ_FIRST(&qlist->head);
|
|
}
|
|
|
|
static inline const QListEntry *qlist_next(const QListEntry *entry)
|
|
{
|
|
return QTAILQ_NEXT(entry, next);
|
|
}
|
|
|
|
#endif /* QLIST_H */
|