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param: Avoid strchrs

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Using prefixed property names like GtkWidget::visible
is very deprectated and basically never done. So avoid
paying the strchr cost before doing the first lookup.
This commit is contained in:
Matthias Clasen 2022-05-19 19:17:55 -04:00
parent 91dafa85fc
commit 51215bf7b8
1 changed files with 35 additions and 31 deletions
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66
gobject/gparam.c
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@ -1094,53 +1094,57 @@ g_param_spec_pool_lookup (GParamSpecPool *pool,
gboolean walk_ancestors)
{
GParamSpec *pspec;
gchar *delim;
g_return_val_if_fail (pool != NULL, NULL);
g_return_val_if_fail (param_name != NULL, NULL);
g_mutex_lock (&pool->mutex);
delim = pool->type_prefixing ? strchr (param_name, ':') : NULL;
/* try quick and away, i.e. without prefix */
if (!delim)
pspec = param_spec_ht_lookup (pool->hash_table, param_name, owner_type, walk_ancestors);
if (pspec)
{
pspec = param_spec_ht_lookup (pool->hash_table, param_name, owner_type, walk_ancestors);
g_mutex_unlock (&pool->mutex);
return pspec;
}
/* strip type prefix */
if (pool->type_prefixing && delim[1] == ':')
if (pool->type_prefixing)
{
guint l = delim - param_name;
gchar stack_buffer[32], *buffer = l < 32 ? stack_buffer : g_new (gchar, l + 1);
GType type;
strncpy (buffer, param_name, delim - param_name);
buffer[l] = 0;
type = g_type_from_name (buffer);
if (l >= 32)
g_free (buffer);
if (type) /* type==0 isn't a valid type pefix */
{
/* sanity check, these cases don't make a whole lot of sense */
if ((!walk_ancestors && type != owner_type) || !g_type_is_a (owner_type, type))
{
g_mutex_unlock (&pool->mutex);
char *delim;
return NULL;
}
owner_type = type;
param_name += l + 2;
pspec = param_spec_ht_lookup (pool->hash_table, param_name, owner_type, walk_ancestors);
g_mutex_unlock (&pool->mutex);
delim = strchr (param_name, ':');
return pspec;
}
/* strip type prefix */
if (delim && delim[1] == ':')
{
guint l = delim - param_name;
gchar stack_buffer[32], *buffer = l < 32 ? stack_buffer : g_new (gchar, l + 1);
GType type;
strncpy (buffer, param_name, delim - param_name);
buffer[l] = 0;
type = g_type_from_name (buffer);
if (l >= 32)
g_free (buffer);
if (type) /* type==0 isn't a valid type pefix */
{
/* sanity check, these cases don't make a whole lot of sense */
if ((!walk_ancestors && type != owner_type) || !g_type_is_a (owner_type, type))
{
g_mutex_unlock (&pool->mutex);
return NULL;
}
owner_type = type;
param_name += l + 2;
pspec = param_spec_ht_lookup (pool->hash_table, param_name, owner_type, walk_ancestors);
g_mutex_unlock (&pool->mutex);
return pspec;
}
}
}
/* malformed param_name */
g_mutex_unlock (&pool->mutex);