Use atomic reference counting.

2008-08-22  Behdad Esfahbod  <behdad@gnome.org>

        * pango/fonts.c (pango_font_metrics_ref),
        (pango_font_metrics_unref):
        * pango/pango-attributes.c (pango_attr_list_ref),
        (pango_attr_list_unref):
        * pango/pango-coverage.c (pango_coverage_ref),
        (pango_coverage_unref):
        * pango/pango-layout.c (pango_layout_line_ref),
        (pango_layout_line_unref):
        * pango/pangowin32-fontcache.c (cache_entry_unref),
        (pango_win32_font_cache_loadw):
        * pango/pangox-fontcache.c (cache_entry_unref),
        (pango_x_font_cache_load):
        Use atomic reference counting.

        Pango may not be thread safe yet, but fixing it little by little
        is easier than doing all in one round.

svn path=/trunk/; revision=2705

1 files changed, 2 insertions, 4 deletions

diff --git a/pango/fonts.c b/pango/fonts.c
index 2f997035..066c54ce 100644
--- a/pango/fonts.c
+++ b/pango/fonts.c
@@ -1489,7 +1489,7 @@ pango_font_metrics_ref (PangoFontMetrics *metrics)
   if (metrics == NULL)
     return NULL;
 
-  metrics->ref_count++;
+  g_atomic_int_inc (&metrics->ref_count);
 
   return metrics;
 }
@@ -1510,9 +1510,7 @@ pango_font_metrics_unref (PangoFontMetrics *metrics)
 
   g_return_if_fail (metrics->ref_count > 0 );
 
-  metrics->ref_count--;
-
-  if (metrics->ref_count == 0)
+  if (g_atomic_int_dec_and_test (&metrics->ref_count))
     g_slice_free (PangoFontMetrics, metrics);
 }