48 HB_INTERNAL const hb_shaper_pair_t *
49 _hb_shapers_get (void);
50
51
52 /* For embedding in face / font / ... */
53 struct hb_shaper_data_t {
54 #define HB_SHAPER_IMPLEMENT(shaper) void *shaper;
55 #include "hb-shaper-list.hh"
56 #undef HB_SHAPER_IMPLEMENT
57 };
58
59 #define HB_SHAPERS_COUNT (sizeof (hb_shaper_data_t) / sizeof (void *))
60
61 /* Means: succeeded, but don't need to keep any data. */
62 #define HB_SHAPER_DATA_SUCCEEDED ((void *) +1)
63
64 /* Means: tried but failed to create. */
65 #define HB_SHAPER_DATA_INVALID ((void *) -1)
66 #define HB_SHAPER_DATA_IS_INVALID(data) ((void *) (data) == HB_SHAPER_DATA_INVALID)
67
68 #define HB_SHAPER_DATA_TYPE(shaper, object) struct hb_##shaper##_shaper_##object##_data_t
69 #define HB_SHAPER_DATA_INSTANCE(shaper, object, instance) (* (HB_SHAPER_DATA_TYPE(shaper, object) **) &(instance)->shaper_data.shaper)
70 #define HB_SHAPER_DATA(shaper, object) HB_SHAPER_DATA_INSTANCE (shaper, object, object)
71 #define HB_SHAPER_DATA_CREATE_FUNC(shaper, object) _hb_##shaper##_shaper_##object##_data_create
72 #define HB_SHAPER_DATA_DESTROY_FUNC(shaper, object) _hb_##shaper##_shaper_##object##_data_destroy
73
74 #define HB_SHAPER_DATA_PROTOTYPE(shaper, object) \
75 HB_SHAPER_DATA_TYPE (shaper, object); /* Type forward declaration. */ \
76 extern "C" HB_INTERNAL HB_SHAPER_DATA_TYPE (shaper, object) * \
77 HB_SHAPER_DATA_CREATE_FUNC (shaper, object) (hb_##object##_t *object HB_SHAPER_DATA_CREATE_FUNC_EXTRA_ARGS); \
78 extern "C" HB_INTERNAL void \
79 HB_SHAPER_DATA_DESTROY_FUNC (shaper, object) (HB_SHAPER_DATA_TYPE (shaper, object) *data)
80
81 #define HB_SHAPER_DATA_DESTROY(shaper, object) \
82 if (HB_SHAPER_DATA_TYPE (shaper, object) *data = HB_SHAPER_DATA (shaper, object)) \
83 if (data != HB_SHAPER_DATA_INVALID && data != HB_SHAPER_DATA_SUCCEEDED) \
84 HB_SHAPER_DATA_DESTROY_FUNC (shaper, object) (data);
85
86 #define HB_SHAPER_DATA_ENSURE_DECLARE(shaper, object) \
87 static inline bool \
88 hb_##shaper##_shaper_##object##_data_ensure (hb_##object##_t *object) \
89 {\
90 retry: \
91 HB_SHAPER_DATA_TYPE (shaper, object) *data = (HB_SHAPER_DATA_TYPE (shaper, object) *) hb_atomic_ptr_get (&HB_SHAPER_DATA (shaper, object)); \
92 if (unlikely (!data)) { \
93 data = HB_SHAPER_DATA_CREATE_FUNC (shaper, object) (object); \
94 if (unlikely (!data)) \
95 data = (HB_SHAPER_DATA_TYPE (shaper, object) *) HB_SHAPER_DATA_INVALID; \
96 if (!hb_atomic_ptr_cmpexch (&HB_SHAPER_DATA (shaper, object), NULL, data)) { \
97 if (data && \
98 data != HB_SHAPER_DATA_INVALID && \
99 data != HB_SHAPER_DATA_SUCCEEDED) \
100 HB_SHAPER_DATA_DESTROY_FUNC (shaper, object) (data); \
101 goto retry; \
102 } \
103 } \
104 return data != NULL && !HB_SHAPER_DATA_IS_INVALID (data); \
105 }
106
107
108 #endif /* HB_SHAPER_PRIVATE_HH */
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48 HB_INTERNAL const hb_shaper_pair_t *
49 _hb_shapers_get (void);
50
51
52 /* For embedding in face / font / ... */
53 struct hb_shaper_data_t {
54 #define HB_SHAPER_IMPLEMENT(shaper) void *shaper;
55 #include "hb-shaper-list.hh"
56 #undef HB_SHAPER_IMPLEMENT
57 };
58
59 #define HB_SHAPERS_COUNT (sizeof (hb_shaper_data_t) / sizeof (void *))
60
61 /* Means: succeeded, but don't need to keep any data. */
62 #define HB_SHAPER_DATA_SUCCEEDED ((void *) +1)
63
64 /* Means: tried but failed to create. */
65 #define HB_SHAPER_DATA_INVALID ((void *) -1)
66 #define HB_SHAPER_DATA_IS_INVALID(data) ((void *) (data) == HB_SHAPER_DATA_INVALID)
67
68 #define HB_SHAPER_DATA_TYPE_NAME(shaper, object) hb_##shaper##_shaper_##object##_data_t
69 #define HB_SHAPER_DATA_TYPE(shaper, object) struct HB_SHAPER_DATA_TYPE_NAME(shaper, object)
70 #define HB_SHAPER_DATA_INSTANCE(shaper, object, instance) (* (HB_SHAPER_DATA_TYPE(shaper, object) **) &(instance)->shaper_data.shaper)
71 #define HB_SHAPER_DATA(shaper, object) HB_SHAPER_DATA_INSTANCE(shaper, object, object)
72 #define HB_SHAPER_DATA_CREATE_FUNC(shaper, object) _hb_##shaper##_shaper_##object##_data_create
73 #define HB_SHAPER_DATA_DESTROY_FUNC(shaper, object) _hb_##shaper##_shaper_##object##_data_destroy
74 #define HB_SHAPER_DATA_ENSURE_FUNC(shaper, object) hb_##shaper##_shaper_##object##_data_ensure
75
76 #define HB_SHAPER_DATA_PROTOTYPE(shaper, object) \
77 HB_SHAPER_DATA_TYPE (shaper, object); /* Type forward declaration. */ \
78 extern "C" HB_INTERNAL HB_SHAPER_DATA_TYPE (shaper, object) * \
79 HB_SHAPER_DATA_CREATE_FUNC (shaper, object) (hb_##object##_t *object HB_SHAPER_DATA_CREATE_FUNC_EXTRA_ARGS); \
80 extern "C" HB_INTERNAL void \
81 HB_SHAPER_DATA_DESTROY_FUNC (shaper, object) (HB_SHAPER_DATA_TYPE (shaper, object) *data); \
82 extern "C" HB_INTERNAL bool \
83 HB_SHAPER_DATA_ENSURE_FUNC (shaper, object) (hb_##object##_t *object)
84
85 #define HB_SHAPER_DATA_DESTROY(shaper, object) \
86 if (HB_SHAPER_DATA_TYPE (shaper, object) *data = HB_SHAPER_DATA (shaper, object)) \
87 if (data != HB_SHAPER_DATA_INVALID && data != HB_SHAPER_DATA_SUCCEEDED) \
88 HB_SHAPER_DATA_DESTROY_FUNC (shaper, object) (data);
89
90 #define HB_SHAPER_DATA_ENSURE_DEFINE(shaper, object) \
91 HB_SHAPER_DATA_ENSURE_DEFINE_WITH_CONDITION(shaper, object, true)
92
93 #define HB_SHAPER_DATA_ENSURE_DEFINE_WITH_CONDITION(shaper, object, condition) \
94 bool \
95 HB_SHAPER_DATA_ENSURE_FUNC(shaper, object) (hb_##object##_t *object) \
96 {\
97 retry: \
98 HB_SHAPER_DATA_TYPE (shaper, object) *data = (HB_SHAPER_DATA_TYPE (shaper, object) *) hb_atomic_ptr_get (&HB_SHAPER_DATA (shaper, object)); \
99 if (likely (data) && !(condition)) { \
100 /* Drop and recreate. */ \
101 /* If someone dropped it in the mean time, throw it away and don't touch it. \
102 * Otherwise, destruct it. */ \
103 if (hb_atomic_ptr_cmpexch (&HB_SHAPER_DATA (shaper, object), data, nullptr)) { \
104 HB_SHAPER_DATA_DESTROY_FUNC (shaper, object) (data); \
105 } \
106 goto retry; \
107 } \
108 if (unlikely (!data)) { \
109 data = HB_SHAPER_DATA_CREATE_FUNC (shaper, object) (object); \
110 if (unlikely (!data)) \
111 data = (HB_SHAPER_DATA_TYPE (shaper, object) *) HB_SHAPER_DATA_INVALID; \
112 if (!hb_atomic_ptr_cmpexch (&HB_SHAPER_DATA (shaper, object), nullptr, data)) { \
113 if (data && \
114 data != HB_SHAPER_DATA_INVALID && \
115 data != HB_SHAPER_DATA_SUCCEEDED) \
116 HB_SHAPER_DATA_DESTROY_FUNC (shaper, object) (data); \
117 goto retry; \
118 } \
119 } \
120 return data != nullptr && !HB_SHAPER_DATA_IS_INVALID (data); \
121 }
122
123
124 #endif /* HB_SHAPER_PRIVATE_HH */
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