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dbus: Add generic internal function to send messages with reply 

SDL_DBus_CallWithBasicReply() allows us to send a DBus message and get
its result, if it is a basic type, e.g. integer or string.

With this function we avoid duplicating code.

Signed-off-by: Ludovico de Nittis <ludovico.denittis@collabora.com>
This commit is contained in:
Ludovico de Nittis 2022-08-25 16:18:45 +02:00 committed by Sam Lantinga
parent 1153aaae0d
commit a3ce700ded
1 changed files with 27 additions and 13 deletions
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40
src/core/linux/SDL_dbus.c
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@ -287,6 +287,32 @@ SDL_DBus_CallVoidMethodInternal(DBusConnection *conn, const char *node, const ch
return retval;
}
static SDL_bool
SDL_DBus_CallWithBasicReply(DBusConnection *conn, DBusMessage *msg, const int expectedtype, void *result)
{
SDL_bool retval = SDL_FALSE;
DBusMessage *reply = dbus.connection_send_with_reply_and_block(conn, msg, 300, NULL);
if (reply) {
DBusMessageIter iter, actual_iter;
dbus.message_iter_init(reply, &iter);
if (dbus.message_iter_get_arg_type(&iter) == DBUS_TYPE_VARIANT) {
dbus.message_iter_recurse(&iter, &actual_iter);
} else {
actual_iter = iter;
}
if (dbus.message_iter_get_arg_type(&actual_iter) == expectedtype) {
dbus.message_iter_get_basic(&actual_iter, result);
retval = SDL_TRUE;
}
dbus.message_unref(reply);
}
return retval;
}
SDL_bool
SDL_DBus_CallVoidMethodOnConnection(DBusConnection *conn, const char *node, const char *path, const char *interface, const char *method, ...)
{
@ -318,19 +344,7 @@ SDL_DBus_QueryPropertyOnConnection(DBusConnection *conn, const char *node, const
DBusMessage *msg = dbus.message_new_method_call(node, path, "org.freedesktop.DBus.Properties", "Get");
if (msg) {
if (dbus.message_append_args(msg, DBUS_TYPE_STRING, &interface, DBUS_TYPE_STRING, &property, DBUS_TYPE_INVALID)) {
DBusMessage *reply = dbus.connection_send_with_reply_and_block(conn, msg, 300, NULL);
if (reply) {
DBusMessageIter iter, sub;
dbus.message_iter_init(reply, &iter);
if (dbus.message_iter_get_arg_type(&iter) == DBUS_TYPE_VARIANT) {
dbus.message_iter_recurse(&iter, &sub);
if (dbus.message_iter_get_arg_type(&sub) == expectedtype) {
dbus.message_iter_get_basic(&sub, result);
retval = SDL_TRUE;
}
}
dbus.message_unref(reply);
}
retval = SDL_DBus_CallWithBasicReply(conn, msg, expectedtype, result);
}
dbus.message_unref(msg);
}