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Merge branch 'th/gobject-new-parameter-list' into 'master'

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gobject: allocate parameter list for g_object_new_valist() entirely on stack

See merge request GNOME/glib!1385
This commit is contained in:
Philip Withnall 2020-11-21 22:55:55 +00:00
commit 9f041c9e05
1 changed files with 38 additions and 17 deletions
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55
gobject/gobject.c
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@ -2005,9 +2005,10 @@ g_object_new_is_valid_property (GType object_type,
GParamSpec *pspec,
const char *name,
GObjectConstructParam *params,
int n_params)
guint n_params)
{
gint i;
guint i;
if (G_UNLIKELY (pspec == NULL))
{
g_critical ("%s: object class '%s' has no property named '%s'",
@ -2217,13 +2218,15 @@ g_object_new_valist (GType object_type,
if (first_property_name)
{
GObjectConstructParam stack_params[16];
GObjectConstructParam *params;
GObjectConstructParam params_stack[16];
GValue values_stack[G_N_ELEMENTS (params_stack)];
const gchar *name;
gint n_params = 0;
GObjectConstructParam *params = params_stack;
GValue *values = values_stack;
guint n_params = 0;
guint n_params_alloc = G_N_ELEMENTS (params_stack);
name = first_property_name;
params = stack_params;
do
{
@ -2235,24 +2238,39 @@ g_object_new_valist (GType object_type,
if (!g_object_new_is_valid_property (object_type, pspec, name, params, n_params))
break;
if (n_params == 16)
if (G_UNLIKELY (n_params == n_params_alloc))
{
params = g_new (GObjectConstructParam, n_params + 1);
memcpy (params, stack_params, sizeof stack_params);
guint i;
if (n_params_alloc == G_N_ELEMENTS (params_stack))
{
n_params_alloc = G_N_ELEMENTS (params_stack) * 2u;
params = g_new (GObjectConstructParam, n_params_alloc);
values = g_new (GValue, n_params_alloc);
memcpy (params, params_stack, sizeof (GObjectConstructParam) * n_params);
memcpy (values, values_stack, sizeof (GValue) * n_params);
}
else
{
n_params_alloc *= 2u;
params = g_realloc (params, sizeof (GObjectConstructParam) * n_params_alloc);
values = g_realloc (values, sizeof (GValue) * n_params_alloc);
}
for (i = 0; i < n_params; i++)
params[i].value = &values[i];
}
else if (n_params > 16)
params = g_renew (GObjectConstructParam, params, n_params + 1);
params[n_params].pspec = pspec;
params[n_params].value = g_newa (GValue, 1);
memset (params[n_params].value, 0, sizeof (GValue));
params[n_params].value = &values[n_params];
memset (&values[n_params], 0, sizeof (GValue));
G_VALUE_COLLECT_INIT (params[n_params].value, pspec->value_type, var_args, 0, &error);
G_VALUE_COLLECT_INIT (&values[n_params], pspec->value_type, var_args, 0, &error);
if (error)
{
g_critical ("%s: %s", G_STRFUNC, error);
g_value_unset (params[n_params].value);
g_value_unset (&values[n_params]);
g_free (error);
break;
}
@ -2266,8 +2284,11 @@ g_object_new_valist (GType object_type,
while (n_params--)
g_value_unset (params[n_params].value);
if (params != stack_params)
g_free (params);
if (G_UNLIKELY (n_params_alloc != G_N_ELEMENTS (params_stack)))
{
g_free (params);
g_free (values);
}
}
else
/* Fast case: no properties passed in. */