user: Restore debug usage message for '-d ?' in user mode emulation

[qemu.git] / qlist.c

diff --git a/qlist.c b/qlist.c
index ba2c66c01c1348d43e6b024c31c124f4401715a5..5730fb87f7bd848e2493d55bde055bf9e3965faf 100644 (file)
--- a/qlist.c
+++ b/qlist.c
@@ -1,14 +1,15 @@
 /*
- * QList data type.
+ * QList Module
  *
  * 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.
+ * 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"
@@ -37,6 +38,23 @@ QList *qlist_new(void)
     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
  *
@@ -67,6 +85,45 @@ void qlist_iter(const QList *qlist,
         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
  */