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structure: Make structure abbreviations array one-time initialization threadsafe

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Sebastian Dröge 2010-03-28 19:13:22 +02:00
parent ad230b07f6
commit e305e49ef4
1 changed files with 7 additions and 5 deletions
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12
gst/gststructure.c
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@ -1505,10 +1505,11 @@ static GstStructureAbbreviation *
gst_structure_get_abbrs (gint * n_abbrs) gst_structure_get_abbrs (gint * n_abbrs)
{ {
static GstStructureAbbreviation *abbrs = NULL; static GstStructureAbbreviation *abbrs = NULL;
static gint num = 0; static volatile gsize num = 0;
if (abbrs == NULL) { if (g_once_init_enter (&num)) {
/* dynamically generate the array */ /* dynamically generate the array */
gsize _num;
GstStructureAbbreviation dyn_abbrs[] = { GstStructureAbbreviation dyn_abbrs[] = {
{"int", G_TYPE_INT} {"int", G_TYPE_INT}
, ,
@ -1548,10 +1549,11 @@ gst_structure_get_abbrs (gint * n_abbrs)
, ,
{"structure", GST_TYPE_STRUCTURE} {"structure", GST_TYPE_STRUCTURE}
}; };
num = G_N_ELEMENTS (dyn_abbrs); _num = G_N_ELEMENTS (dyn_abbrs);
/* permanently allocate and copy the array now */ /* permanently allocate and copy the array now */
abbrs = g_new0 (GstStructureAbbreviation, num); abbrs = g_new0 (GstStructureAbbreviation, _num);
memcpy (abbrs, dyn_abbrs, sizeof (GstStructureAbbreviation) * num); memcpy (abbrs, dyn_abbrs, sizeof (GstStructureAbbreviation) * _num);
g_once_init_leave (&num, _num);
} }
*n_abbrs = num; *n_abbrs = num;