From 4faaec6acf7f18b39c362edb9f6aa5658aab8b85 Mon Sep 17 00:00:00 2001 From: Paolo Bonzini Date: Thu, 22 Mar 2012 12:51:09 +0100 Subject: qapi: place outermost object on qiv stack This is a slight change in the implementation of QMPInputVisitor that helps when adding strict mode. Const QObjects cannot be inc/decref-ed, and that's why QMPInputVisitor relies heavily on weak references to inner objects. I'm not removing the weak references now, but since refcount+const is a lost battle in C (C++ has "mutable") I think removing const is fine in this case. Signed-off-by: Paolo Bonzini Reviewed-by: Anthony Liguori Signed-off-by: Luiz Capitulino --- qapi/qmp-input-visitor.c | 41 +++++++++++++++++------------------------ 1 file changed, 17 insertions(+), 24 deletions(-) (limited to 'qapi') diff --git a/qapi/qmp-input-visitor.c b/qapi/qmp-input-visitor.c index 413e3338eb..5765e76e43 100644 --- a/qapi/qmp-input-visitor.c +++ b/qapi/qmp-input-visitor.c @@ -22,14 +22,13 @@ typedef struct StackObject { - const QObject *obj; - const QListEntry *entry; + QObject *obj; + const QListEntry *entry; } StackObject; struct QmpInputVisitor { Visitor visitor; - QObject *obj; StackObject stack[QIV_STACK_SIZE]; int nb_stack; }; @@ -39,21 +38,15 @@ static QmpInputVisitor *to_qiv(Visitor *v) return container_of(v, QmpInputVisitor, visitor); } -static const QObject *qmp_input_get_object(QmpInputVisitor *qiv, - const char *name) +static QObject *qmp_input_get_object(QmpInputVisitor *qiv, + const char *name) { - const QObject *qobj; - - if (qiv->nb_stack == 0) { - qobj = qiv->obj; - } else { - qobj = qiv->stack[qiv->nb_stack - 1].obj; - } + QObject *qobj = qiv->stack[qiv->nb_stack - 1].obj; if (qobj) { if (name && qobject_type(qobj) == QTYPE_QDICT) { return qdict_get(qobject_to_qdict(qobj), name); - } else if (qiv->nb_stack > 0 && qobject_type(qobj) == QTYPE_QLIST) { + } else if (qiv->stack[qiv->nb_stack - 1].entry) { return qlist_entry_obj(qiv->stack[qiv->nb_stack - 1].entry); } } @@ -61,7 +54,7 @@ static const QObject *qmp_input_get_object(QmpInputVisitor *qiv, return qobj; } -static void qmp_input_push(QmpInputVisitor *qiv, const QObject *obj, Error **errp) +static void qmp_input_push(QmpInputVisitor *qiv, QObject *obj, Error **errp) { qiv->stack[qiv->nb_stack].obj = obj; qiv->stack[qiv->nb_stack].entry = NULL; @@ -83,7 +76,7 @@ static void qmp_input_start_struct(Visitor *v, void **obj, const char *kind, const char *name, size_t size, Error **errp) { QmpInputVisitor *qiv = to_qiv(v); - const QObject *qobj = qmp_input_get_object(qiv, name); + QObject *qobj = qmp_input_get_object(qiv, name); Error *err = NULL; if (!qobj || qobject_type(qobj) != QTYPE_QDICT) { @@ -113,7 +106,7 @@ static void qmp_input_end_struct(Visitor *v, Error **errp) static void qmp_input_start_list(Visitor *v, const char *name, Error **errp) { QmpInputVisitor *qiv = to_qiv(v); - const QObject *qobj = qmp_input_get_object(qiv, name); + QObject *qobj = qmp_input_get_object(qiv, name); if (!qobj || qobject_type(qobj) != QTYPE_QLIST) { error_set(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null", @@ -165,7 +158,7 @@ static void qmp_input_type_int(Visitor *v, int64_t *obj, const char *name, Error **errp) { QmpInputVisitor *qiv = to_qiv(v); - const QObject *qobj = qmp_input_get_object(qiv, name); + QObject *qobj = qmp_input_get_object(qiv, name); if (!qobj || qobject_type(qobj) != QTYPE_QINT) { error_set(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null", @@ -180,7 +173,7 @@ static void qmp_input_type_bool(Visitor *v, bool *obj, const char *name, Error **errp) { QmpInputVisitor *qiv = to_qiv(v); - const QObject *qobj = qmp_input_get_object(qiv, name); + QObject *qobj = qmp_input_get_object(qiv, name); if (!qobj || qobject_type(qobj) != QTYPE_QBOOL) { error_set(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null", @@ -195,7 +188,7 @@ static void qmp_input_type_str(Visitor *v, char **obj, const char *name, Error **errp) { QmpInputVisitor *qiv = to_qiv(v); - const QObject *qobj = qmp_input_get_object(qiv, name); + QObject *qobj = qmp_input_get_object(qiv, name); if (!qobj || qobject_type(qobj) != QTYPE_QSTRING) { error_set(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null", @@ -210,7 +203,7 @@ static void qmp_input_type_number(Visitor *v, double *obj, const char *name, Error **errp) { QmpInputVisitor *qiv = to_qiv(v); - const QObject *qobj = qmp_input_get_object(qiv, name); + QObject *qobj = qmp_input_get_object(qiv, name); if (!qobj || qobject_type(qobj) != QTYPE_QFLOAT) { error_set(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null", @@ -225,7 +218,7 @@ static void qmp_input_start_optional(Visitor *v, bool *present, const char *name, Error **errp) { QmpInputVisitor *qiv = to_qiv(v); - const QObject *qobj = qmp_input_get_object(qiv, name); + QObject *qobj = qmp_input_get_object(qiv, name); if (!qobj) { *present = false; @@ -242,7 +235,7 @@ Visitor *qmp_input_get_visitor(QmpInputVisitor *v) void qmp_input_visitor_cleanup(QmpInputVisitor *v) { - qobject_decref(v->obj); + qobject_decref(v->stack[0].obj); g_free(v); } @@ -264,8 +257,8 @@ QmpInputVisitor *qmp_input_visitor_new(QObject *obj) v->visitor.type_number = qmp_input_type_number; v->visitor.start_optional = qmp_input_start_optional; - v->obj = obj; - qobject_incref(v->obj); + qmp_input_push(v, obj, NULL); + qobject_incref(obj); return v; } -- cgit v1.2.3