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src/java.desktop/share/native/libfontmanager/harfbuzz/hb-shaper.hh

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@@ -22,14 +22,15 @@
  * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
  *
  * Google Author(s): Behdad Esfahbod
  */
 
-#ifndef HB_SHAPER_PRIVATE_HH
-#define HB_SHAPER_PRIVATE_HH
+#ifndef HB_SHAPER_HH
+#define HB_SHAPER_HH
 
-#include "hb-private.hh"
+#include "hb.hh"
+#include "hb-machinery.hh"
 
 typedef hb_bool_t hb_shape_func_t (hb_shape_plan_t    *shape_plan,
                                    hb_font_t          *font,
                                    hb_buffer_t        *buffer,
                                    const hb_feature_t *features,

@@ -38,87 +39,96 @@
 #define HB_SHAPER_IMPLEMENT(name) \
         extern "C" HB_INTERNAL hb_shape_func_t _hb_##name##_shape;
 #include "hb-shaper-list.hh"
 #undef HB_SHAPER_IMPLEMENT
 
-struct hb_shaper_pair_t {
+struct hb_shaper_entry_t {
   char name[16];
   hb_shape_func_t *func;
 };
 
-HB_INTERNAL const hb_shaper_pair_t *
-_hb_shapers_get (void);
+HB_INTERNAL const hb_shaper_entry_t *
+_hb_shapers_get ();
 
 
-/* For embedding in face / font / ... */
-struct hb_shaper_data_t {
-#define HB_SHAPER_IMPLEMENT(shaper) void *shaper;
+template <typename Data, unsigned int WheresData, typename T>
+struct hb_shaper_lazy_loader_t;
+
+#define HB_SHAPER_ORDER(Shaper) \
+  HB_PASTE (HB_SHAPER_ORDER_, Shaper)
+enum hb_shaper_order_t
+{
+  _HB_SHAPER_ORDER_ORDER_ZERO,
+#define HB_SHAPER_IMPLEMENT(Shaper) \
+      HB_SHAPER_ORDER (Shaper),
 #include "hb-shaper-list.hh"
 #undef HB_SHAPER_IMPLEMENT
+  _HB_SHAPERS_COUNT_PLUS_ONE,
+  HB_SHAPERS_COUNT = _HB_SHAPERS_COUNT_PLUS_ONE - 1,
 };
 
-#define HB_SHAPERS_COUNT (sizeof (hb_shaper_data_t) / sizeof (void *))
+template <enum hb_shaper_order_t order, typename Object> struct hb_shaper_object_data_type_t;
 
-/* Means: succeeded, but don't need to keep any data. */
 #define HB_SHAPER_DATA_SUCCEEDED ((void *) +1)
-
-/* Means: tried but failed to create. */
-#define HB_SHAPER_DATA_INVALID ((void *) -1)
-#define HB_SHAPER_DATA_IS_INVALID(data) ((void *) (data) == HB_SHAPER_DATA_INVALID)
-
-#define HB_SHAPER_DATA_TYPE_NAME(shaper, object)        hb_##shaper##_shaper_##object##_data_t
-#define HB_SHAPER_DATA_TYPE(shaper, object)             struct HB_SHAPER_DATA_TYPE_NAME(shaper, object)
-#define HB_SHAPER_DATA_INSTANCE(shaper, object, instance)       (* (HB_SHAPER_DATA_TYPE(shaper, object) **) &(instance)->shaper_data.shaper)
-#define HB_SHAPER_DATA(shaper, object)                  HB_SHAPER_DATA_INSTANCE(shaper, object, object)
+#define HB_SHAPER_DATA_TYPE(shaper, object)             hb_##shaper##_##object##_data_t
 #define HB_SHAPER_DATA_CREATE_FUNC(shaper, object)      _hb_##shaper##_shaper_##object##_data_create
 #define HB_SHAPER_DATA_DESTROY_FUNC(shaper, object)     _hb_##shaper##_shaper_##object##_data_destroy
-#define HB_SHAPER_DATA_ENSURE_FUNC(shaper, object)      hb_##shaper##_shaper_##object##_data_ensure
 
-#define HB_SHAPER_DATA_PROTOTYPE(shaper, object) \
-        HB_SHAPER_DATA_TYPE (shaper, object); /* Type forward declaration. */ \
+#define HB_SHAPER_DATA_INSTANTIATE_SHAPERS(shaper, object) \
+        \
+        struct HB_SHAPER_DATA_TYPE (shaper, object); /* Type forward declaration. */ \
         extern "C" HB_INTERNAL HB_SHAPER_DATA_TYPE (shaper, object) * \
-        HB_SHAPER_DATA_CREATE_FUNC (shaper, object) (hb_##object##_t *object HB_SHAPER_DATA_CREATE_FUNC_EXTRA_ARGS); \
+        HB_SHAPER_DATA_CREATE_FUNC (shaper, object) (hb_##object##_t *object); \
         extern "C" HB_INTERNAL void \
-        HB_SHAPER_DATA_DESTROY_FUNC (shaper, object) (HB_SHAPER_DATA_TYPE (shaper, object) *data); \
-        extern "C" HB_INTERNAL bool \
-        HB_SHAPER_DATA_ENSURE_FUNC (shaper, object) (hb_##object##_t *object)
-
-#define HB_SHAPER_DATA_DESTROY(shaper, object) \
-    if (HB_SHAPER_DATA_TYPE (shaper, object) *data = HB_SHAPER_DATA (shaper, object)) \
-      if (data != HB_SHAPER_DATA_INVALID && data != HB_SHAPER_DATA_SUCCEEDED) \
-        HB_SHAPER_DATA_DESTROY_FUNC (shaper, object) (data);
-
-#define HB_SHAPER_DATA_ENSURE_DEFINE(shaper, object) \
-        HB_SHAPER_DATA_ENSURE_DEFINE_WITH_CONDITION(shaper, object, true)
-
-#define HB_SHAPER_DATA_ENSURE_DEFINE_WITH_CONDITION(shaper, object, condition) \
-bool \
-HB_SHAPER_DATA_ENSURE_FUNC(shaper, object) (hb_##object##_t *object) \
-{\
-  retry: \
-  HB_SHAPER_DATA_TYPE (shaper, object) *data = (HB_SHAPER_DATA_TYPE (shaper, object) *) hb_atomic_ptr_get (&HB_SHAPER_DATA (shaper, object)); \
-  if (likely (data) && !(condition)) { \
-    /* Drop and recreate. */ \
-    /* If someone dropped it in the mean time, throw it away and don't touch it. \
-     * Otherwise, destruct it. */ \
-    if (hb_atomic_ptr_cmpexch (&HB_SHAPER_DATA (shaper, object), data, nullptr)) { \
-      HB_SHAPER_DATA_DESTROY_FUNC (shaper, object) (data); \
-    } \
-    goto retry; \
-  } \
-  if (unlikely (!data)) { \
-    data = HB_SHAPER_DATA_CREATE_FUNC (shaper, object) (object); \
-    if (unlikely (!data)) \
-      data = (HB_SHAPER_DATA_TYPE (shaper, object) *) HB_SHAPER_DATA_INVALID; \
-    if (!hb_atomic_ptr_cmpexch (&HB_SHAPER_DATA (shaper, object), nullptr, data)) { \
-      if (data && \
-          data != HB_SHAPER_DATA_INVALID && \
-          data != HB_SHAPER_DATA_SUCCEEDED) \
-        HB_SHAPER_DATA_DESTROY_FUNC (shaper, object) (data); \
-      goto retry; \
-    } \
-  } \
-  return data != nullptr && !HB_SHAPER_DATA_IS_INVALID (data); \
-}
+        HB_SHAPER_DATA_DESTROY_FUNC (shaper, object) (HB_SHAPER_DATA_TYPE (shaper, object) *shaper##_##object); \
+        \
+        template <> \
+        struct hb_shaper_object_data_type_t<HB_SHAPER_ORDER (shaper), hb_##object##_t> \
+        { \
+          typedef HB_SHAPER_DATA_TYPE(shaper, object) value; \
+        }; \
+        \
+        template <unsigned int WheresData> \
+        struct hb_shaper_lazy_loader_t<hb_##object##_t, WheresData, HB_SHAPER_DATA_TYPE(shaper, object)> \
+                : hb_lazy_loader_t<HB_SHAPER_DATA_TYPE(shaper, object), \
+                                   hb_shaper_lazy_loader_t<hb_##object##_t, \
+                                                           WheresData, \
+                                                           HB_SHAPER_DATA_TYPE(shaper, object)>, \
+                                   hb_##object##_t, WheresData> \
+        { \
+          typedef HB_SHAPER_DATA_TYPE(shaper, object) Type; \
+          static Type* create (hb_##object##_t *data) \
+          { return HB_SHAPER_DATA_CREATE_FUNC (shaper, object) (data); } \
+          static Type *get_null () { return nullptr; } \
+          static void destroy (Type *p) { HB_SHAPER_DATA_DESTROY_FUNC (shaper, object) (p); } \
+        }; \
+        \
+        static_assert (true, "") /* Require semicolon. */
+
+
+template <typename Object>
+struct hb_shaper_object_dataset_t
+{
+  void init0 (Object *parent_data)
+  {
+    this->parent_data = parent_data;
+#define HB_SHAPER_IMPLEMENT(shaper) shaper.init0 ();
+#include "hb-shaper-list.hh"
+#undef HB_SHAPER_IMPLEMENT
+  }
+  void fini ()
+  {
+#define HB_SHAPER_IMPLEMENT(shaper) shaper.fini ();
+#include "hb-shaper-list.hh"
+#undef HB_SHAPER_IMPLEMENT
+  }
 
+  Object *parent_data; /* MUST be JUST before the lazy loaders. */
+#define HB_SHAPER_IMPLEMENT(shaper) \
+        hb_shaper_lazy_loader_t<Object, HB_SHAPER_ORDER(shaper), \
+                                typename hb_shaper_object_data_type_t<HB_SHAPER_ORDER(shaper), Object>::value \
+                               > shaper;
+#include "hb-shaper-list.hh"
+#undef HB_SHAPER_IMPLEMENT
+};
 
-#endif /* HB_SHAPER_PRIVATE_HH */
+#endif /* HB_SHAPER_HH */
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