[pango] Make pango-attributes thread-safe

[Behdad Esfahbod <behdad src gnome org>]

commit e7f1f1aab760b87327bd9c35df7c5e3d1d735ac7
Author: Behdad Esfahbod <behdad behdad org>
Date:   Mon Aug 27 22:53:49 2012 -0400

    Make pango-attributes thread-safe

 pango/pango-attributes.c |   14 ++++++++++++--
 1 files changed, 12 insertions(+), 2 deletions(-)
---
diff --git a/pango/pango-attributes.c b/pango/pango-attributes.c
index e76cb71..778a282 100644
--- a/pango/pango-attributes.c
+++ b/pango/pango-attributes.c
@@ -54,7 +54,8 @@ static PangoAttribute *pango_attr_size_new_internal (int                   size,
 						     gboolean              absolute);
 
 
-static GHashTable *name_map = NULL;
+G_LOCK_DEFINE_STATIC (attr_type);
+static GHashTable *name_map = NULL; /* MT-safe */
 
 /**
  * pango_attr_type_register:
@@ -68,7 +69,10 @@ static GHashTable *name_map = NULL;
 PangoAttrType
 pango_attr_type_register (const gchar *name)
 {
-  static guint current_type = 0x1000000;
+  static guint current_type = 0x1000000; /* MT-safe */
+
+  G_LOCK (attr_type);
+
   guint type = current_type++;
 
   if (name)
@@ -79,6 +83,8 @@ pango_attr_type_register (const gchar *name)
       g_hash_table_insert (name_map, GUINT_TO_POINTER (type), (gpointer) g_intern_string (name));
     }
 
+  G_UNLOCK (attr_type);
+
   return type;
 }
 
@@ -102,9 +108,13 @@ pango_attr_type_get_name (PangoAttrType type)
 {
   const char *result = NULL;
 
+  G_LOCK (attr_type);
+
   if (name_map)
     result = g_hash_table_lookup (name_map, GUINT_TO_POINTER ((guint) type));
 
+  G_UNLOCK (attr_type);
+
   return result;
 }