Add m-esr52 at 52.6.0

1 files changed, 202 insertions, 0 deletions

diff --git a/gfx/harfbuzz/src/hb-object-private.hh b/gfx/harfbuzz/src/hb-object-private.hh
new file mode 100644
index 000000000..6b73ff92d
--- /dev/null
+++ b/gfx/harfbuzz/src/hb-object-private.hh
@@ -0,0 +1,202 @@
+/*
+ * Copyright © 2007  Chris Wilson
+ * Copyright © 2009,2010  Red Hat, Inc.
+ * Copyright © 2011,2012  Google, Inc.
+ *
+ *  This is part of HarfBuzz, a text shaping library.
+ *
+ * Permission is hereby granted, without written agreement and without
+ * license or royalty fees, to use, copy, modify, and distribute this
+ * software and its documentation for any purpose, provided that the
+ * above copyright notice and the following two paragraphs appear in
+ * all copies of this software.
+ *
+ * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
+ * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
+ * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
+ * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
+ * DAMAGE.
+ *
+ * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
+ * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
+ * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
+ * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
+ *
+ * Contributor(s):
+ *	Chris Wilson <chris@chris-wilson.co.uk>
+ * Red Hat Author(s): Behdad Esfahbod
+ * Google Author(s): Behdad Esfahbod
+ */
+
+#ifndef HB_OBJECT_PRIVATE_HH
+#define HB_OBJECT_PRIVATE_HH
+
+#include "hb-private.hh"
+
+#include "hb-atomic-private.hh"
+#include "hb-mutex-private.hh"
+
+
+/* Debug */
+
+#ifndef HB_DEBUG_OBJECT
+#define HB_DEBUG_OBJECT (HB_DEBUG+0)
+#endif
+
+
+/* reference_count */
+
+#define HB_REFERENCE_COUNT_INERT_VALUE -1
+#define HB_REFERENCE_COUNT_POISON_VALUE -0x0000DEAD
+#define HB_REFERENCE_COUNT_INIT {HB_ATOMIC_INT_INIT(HB_REFERENCE_COUNT_INERT_VALUE)}
+
+struct hb_reference_count_t
+{
+  hb_atomic_int_t ref_count;
+
+  inline void init (int v) { ref_count.set_unsafe (v); }
+  inline int get_unsafe (void) const { return ref_count.get_unsafe (); }
+  inline int inc (void) { return ref_count.inc (); }
+  inline int dec (void) { return ref_count.dec (); }
+  inline void finish (void) { ref_count.set_unsafe (HB_REFERENCE_COUNT_POISON_VALUE); }
+
+  inline bool is_inert (void) const { return ref_count.get_unsafe () == HB_REFERENCE_COUNT_INERT_VALUE; }
+  inline bool is_valid (void) const { return ref_count.get_unsafe () > 0; }
+};
+
+
+/* user_data */
+
+#define HB_USER_DATA_ARRAY_INIT {HB_MUTEX_INIT, HB_LOCKABLE_SET_INIT}
+struct hb_user_data_array_t
+{
+  struct hb_user_data_item_t {
+    hb_user_data_key_t *key;
+    void *data;
+    hb_destroy_func_t destroy;
+
+    inline bool operator == (hb_user_data_key_t *other_key) const { return key == other_key; }
+    inline bool operator == (hb_user_data_item_t &other) const { return key == other.key; }
+
+    void finish (void) { if (destroy) destroy (data); }
+  };
+
+  hb_mutex_t lock;
+  hb_lockable_set_t<hb_user_data_item_t, hb_mutex_t> items;
+
+  inline void init (void) { lock.init (); items.init (); }
+
+  HB_INTERNAL bool set (hb_user_data_key_t *key,
+			void *              data,
+			hb_destroy_func_t   destroy,
+			hb_bool_t           replace);
+
+  HB_INTERNAL void *get (hb_user_data_key_t *key);
+
+  inline void finish (void) { items.finish (lock); lock.finish (); }
+};
+
+
+/* object_header */
+
+struct hb_object_header_t
+{
+  hb_reference_count_t ref_count;
+  hb_user_data_array_t user_data;
+
+#define HB_OBJECT_HEADER_STATIC {HB_REFERENCE_COUNT_INIT, HB_USER_DATA_ARRAY_INIT}
+
+  private:
+  ASSERT_POD ();
+};
+
+
+/* object */
+
+template <typename Type>
+static inline void hb_object_trace (const Type *obj, const char *function)
+{
+  DEBUG_MSG (OBJECT, (void *) obj,
+	     "%s refcount=%d",
+	     function,
+	     obj ? obj->header.ref_count.get_unsafe () : 0);
+}
+
+template <typename Type>
+static inline Type *hb_object_create (void)
+{
+  Type *obj = (Type *) calloc (1, sizeof (Type));
+
+  if (unlikely (!obj))
+    return obj;
+
+  hb_object_init (obj);
+  hb_object_trace (obj, HB_FUNC);
+  return obj;
+}
+template <typename Type>
+static inline void hb_object_init (Type *obj)
+{
+  obj->header.ref_count.init (1);
+  obj->header.user_data.init ();
+}
+template <typename Type>
+static inline bool hb_object_is_inert (const Type *obj)
+{
+  return unlikely (obj->header.ref_count.is_inert ());
+}
+template <typename Type>
+static inline bool hb_object_is_valid (const Type *obj)
+{
+  return likely (obj->header.ref_count.is_valid ());
+}
+template <typename Type>
+static inline Type *hb_object_reference (Type *obj)
+{
+  hb_object_trace (obj, HB_FUNC);
+  if (unlikely (!obj || hb_object_is_inert (obj)))
+    return obj;
+  assert (hb_object_is_valid (obj));
+  obj->header.ref_count.inc ();
+  return obj;
+}
+template <typename Type>
+static inline bool hb_object_destroy (Type *obj)
+{
+  hb_object_trace (obj, HB_FUNC);
+  if (unlikely (!obj || hb_object_is_inert (obj)))
+    return false;
+  assert (hb_object_is_valid (obj));
+  if (obj->header.ref_count.dec () != 1)
+    return false;
+
+  obj->header.ref_count.finish (); /* Do this before user_data */
+  obj->header.user_data.finish ();
+  return true;
+}
+template <typename Type>
+static inline bool hb_object_set_user_data (Type               *obj,
+					    hb_user_data_key_t *key,
+					    void *              data,
+					    hb_destroy_func_t   destroy,
+					    hb_bool_t           replace)
+{
+  if (unlikely (!obj || hb_object_is_inert (obj)))
+    return false;
+  assert (hb_object_is_valid (obj));
+  return obj->header.user_data.set (key, data, destroy, replace);
+}
+
+template <typename Type>
+static inline void *hb_object_get_user_data (Type               *obj,
+					     hb_user_data_key_t *key)
+{
+  if (unlikely (!obj || hb_object_is_inert (obj)))
+    return NULL;
+  assert (hb_object_is_valid (obj));
+  return obj->header.user_data.get (key);
+}
+
+
+#endif /* HB_OBJECT_PRIVATE_HH */