Update harfbuzz-ng to 1a5a91dc0d8bf4b72a2f22dc6300b06ad7000b79.

third_party/harfbuzz-ng/src/hb-object-private.h

-/*
- * Copyright (C) 2007  Chris Wilson
- * Copyright (C) 2009,2010  Red Hat, 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
- */
-
-#ifndef HB_OBJECT_PRIVATE_H
-#define HB_OBJECT_PRIVATE_H
-
-#include "hb-private.h"
-
-HB_BEGIN_DECLS
-
-
-/* Encapsulate operations on the object's reference count */
-typedef struct {
-  hb_atomic_int_t ref_count;
-} hb_reference_count_t;
-
-#define hb_reference_count_inc(RC) hb_atomic_int_fetch_and_add ((RC).ref_count, 1)
-#define hb_reference_count_dec(RC) hb_atomic_int_fetch_and_add ((RC).ref_count, -1)
-
-#define HB_REFERENCE_COUNT_INIT(RC, VALUE) ((RC).ref_count = (VALUE))
-
-#define HB_REFERENCE_COUNT_GET_VALUE(RC) hb_atomic_int_get ((RC).ref_count)
-#define HB_REFERENCE_COUNT_SET_VALUE(RC, VALUE) hb_atomic_int_set ((RC).ref_count, (VALUE))
-
-#define HB_REFERENCE_COUNT_INVALID_VALUE ((hb_atomic_int_t) -1)
-#define HB_REFERENCE_COUNT_INVALID {HB_REFERENCE_COUNT_INVALID_VALUE}
-
-#define HB_REFERENCE_COUNT_IS_INVALID(RC) (HB_REFERENCE_COUNT_GET_VALUE (RC) == HB_REFERENCE_COUNT_INVALID_VALUE)
-
-#define HB_REFERENCE_COUNT_HAS_REFERENCE(RC) (HB_REFERENCE_COUNT_GET_VALUE (RC) > 0)
-
-
-
-/* Debug */
-
-#ifndef HB_DEBUG_OBJECT
-#define HB_DEBUG_OBJECT (HB_DEBUG+0)
-#endif
-
-static inline void
-_hb_trace_object (const void *obj,
-                  hb_reference_count_t *ref_count,
-                  const char *function)
-{
-  (void) (HB_DEBUG_OBJECT &&
-          fprintf (stderr, "OBJECT(%p) refcount=%d %s\n",
-                   obj,
-                   HB_REFERENCE_COUNT_GET_VALUE (*ref_count),
-                   function));
-}
-
-#define TRACE_OBJECT(obj) _hb_trace_object (obj, &obj->ref_count, __FUNCTION__)
-
-
-
-/* Object allocation and lifecycle manamgement macros */
-
-#define HB_OBJECT_IS_INERT(obj) \
-    (unlikely (HB_REFERENCE_COUNT_IS_INVALID ((obj)->ref_count)))
-
-#define HB_OBJECT_DO_INIT_EXPR(obj) \
-    HB_REFERENCE_COUNT_INIT (obj->ref_count, 1)
-
-#define HB_OBJECT_DO_INIT(obj) \
-  HB_STMT_START { \
-    HB_OBJECT_DO_INIT_EXPR (obj); \
-  } HB_STMT_END
-
-#define HB_OBJECT_DO_CREATE(Type, obj) \
-  likely (( \
-               (void) ( \
-                 ((obj) = (Type *) calloc (1, sizeof (Type))) && \
-                 ( \
-                  HB_OBJECT_DO_INIT_EXPR (obj), \
-                  TRACE_OBJECT (obj), \
-                  TRUE \
-                 ) \
-               ), \
-               (obj) \
-             ))
-
-#define HB_OBJECT_DO_REFERENCE(obj) \
-  HB_STMT_START { \
-    int old_count; \
-    if (unlikely (!(obj) || HB_OBJECT_IS_INERT (obj))) \
-      return obj; \
-    TRACE_OBJECT (obj); \
-    old_count = hb_reference_count_inc (obj->ref_count); \
-    assert (old_count > 0); \
-    return obj; \
-  } HB_STMT_END
-
-#define HB_OBJECT_DO_GET_REFERENCE_COUNT(obj) \
-  HB_STMT_START { \
-    if (unlikely (!(obj) || HB_OBJECT_IS_INERT (obj))) \
-      return 0; \
-    return HB_REFERENCE_COUNT_GET_VALUE (obj->ref_count); \
-  } HB_STMT_END
-
-#define HB_OBJECT_DO_DESTROY(obj) \
-  HB_STMT_START { \
-    int old_count; \
-    if (unlikely (!(obj) || HB_OBJECT_IS_INERT (obj))) \
-      return; \
-    TRACE_OBJECT (obj); \
-    old_count = hb_reference_count_dec (obj->ref_count); \
-    assert (old_count > 0); \
-    if (old_count != 1) \
-      return; \
-  } HB_STMT_END
-
-
-HB_END_DECLS
-
-#endif /* HB_OBJECT_PRIVATE_H */