2 * Copyright © 2007 Chris Wilson
3 * Copyright © 2009,2010 Red Hat, Inc.
4 * Copyright © 2011 Google, Inc.
6 * This is part of HarfBuzz, a text shaping library.
8 * Permission is hereby granted, without written agreement and without
9 * license or royalty fees, to use, copy, modify, and distribute this
10 * software and its documentation for any purpose, provided that the
11 * above copyright notice and the following two paragraphs appear in
12 * all copies of this software.
14 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
15 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
16 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
17 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
20 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
21 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
22 * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
23 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
24 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
27 * Chris Wilson <chris@chris-wilson.co.uk>
28 * Red Hat Author(s): Behdad Esfahbod
29 * Google Author(s): Behdad Esfahbod
32 #ifndef HB_OBJECT_PRIVATE_HH
33 #define HB_OBJECT_PRIVATE_HH
35 #include "hb-private.hh"
42 #ifndef HB_DEBUG_OBJECT
43 #define HB_DEBUG_OBJECT (HB_DEBUG+0)
47 /* atomic_int and mutex */
49 /* We need external help for these */
55 typedef volatile int hb_atomic_int_t;
56 #define hb_atomic_int_fetch_and_add(AI, V) g_atomic_int_exchange_and_add (&(AI), V)
57 #define hb_atomic_int_get(AI) g_atomic_int_get (&(AI))
58 #define hb_atomic_int_set(AI, V) g_atomic_int_set (&(AI), V)
60 typedef GStaticMutex hb_mutex_t;
61 #define HB_MUTEX_INIT G_STATIC_MUTEX_INIT
62 #define hb_mutex_init(M) g_static_mutex_init (&(M))
63 #define hb_mutex_lock(M) g_static_mutex_lock (&(M))
64 #define hb_mutex_trylock(M) g_static_mutex_trylock (&(M))
65 #define hb_mutex_unlock(M) g_static_mutex_unlock (&(M))
66 #define hb_mutex_free(M) g_static_mutex_free (&(M))
74 typedef long hb_atomic_int_t;
75 #define hb_atomic_int_fetch_and_add(AI, V) _InterlockedExchangeAdd (&(AI), V)
76 #define hb_atomic_int_get(AI) (_ReadBarrier (), (AI))
77 #define hb_atomic_int_set(AI, V) ((void) _InterlockedExchange (&(AI), (V)))
81 typedef CRITICAL_SECTION hb_mutex_t;
82 #define HB_MUTEX_INIT { NULL, 0, 0, NULL, NULL, 0 }
83 #define hb_mutex_init(M) InitializeCriticalSection (&(M))
84 #define hb_mutex_lock(M) EnterCriticalSection (&(M))
85 #define hb_mutex_trylock(M) TryEnterCriticalSection (&(M))
86 #define hb_mutex_unlock(M) LeaveCriticalSection (&(M))
87 #define hb_mutex_free(M) DeleteCriticalSection (&(M))
91 #warning "Could not find any system to define platform macros, library will NOT be thread-safe"
93 typedef volatile int hb_atomic_int_t;
94 #define hb_atomic_int_fetch_and_add(AI, V) ((AI) += (V), (AI) - (V))
95 #define hb_atomic_int_get(AI) (AI)
96 #define hb_atomic_int_set(AI, V) ((void) ((AI) = (V)))
98 typedef volatile int hb_mutex_t;
99 #define HB_MUTEX_INIT 0
100 #define hb_mutex_init(M) ((void) ((M) = 0))
101 #define hb_mutex_lock(M) ((void) ((M) = 1))
102 #define hb_mutex_trylock(M) ((M) = 1, 1)
103 #define hb_mutex_unlock(M) ((void) ((M) = 0))
104 #define hb_mutex_free(M) ((void) ((M) = 2))
113 /* reference_count */
116 hb_atomic_int_t ref_count;
118 #define HB_REFERENCE_COUNT_INVALID_VALUE ((hb_atomic_int_t) -1)
119 #define HB_REFERENCE_COUNT_INVALID {HB_REFERENCE_COUNT_INVALID_VALUE}
121 inline void init (int v) { ref_count = v; /* non-atomic is fine */ }
122 inline int inc (void) { return hb_atomic_int_fetch_and_add (ref_count, 1); }
123 inline int dec (void) { return hb_atomic_int_fetch_and_add (ref_count, -1); }
124 inline void set (int v) { hb_atomic_int_set (ref_count, v); }
126 inline int get (void) const { return hb_atomic_int_get (ref_count); }
127 inline bool is_invalid (void) const { return get () == HB_REFERENCE_COUNT_INVALID_VALUE; }
129 } hb_reference_count_t;
134 /* XXX make this thread-safe, somehow! */
138 hb_destroy_func_t destroy;
140 void finish (void) { if (destroy) destroy (data); }
143 struct hb_user_data_array_t {
145 hb_map_t<hb_user_data_key_t *, hb_user_data_t> map;
147 inline bool set (hb_user_data_key_t *key,
149 hb_destroy_func_t destroy)
151 if (!data && !destroy) {
155 hb_user_data_t user_data = {data, destroy};
156 return map.set (key, user_data);
159 inline void *get (hb_user_data_key_t *key) {
160 hb_user_data_t *user_data = map.get (key);
161 return user_data ? user_data->data : NULL;
164 void finish (void) { map.finish (); }
170 typedef struct _hb_object_header_t hb_object_header_t;
172 struct _hb_object_header_t {
173 hb_reference_count_t ref_count;
174 hb_user_data_array_t user_data;
176 #define HB_OBJECT_HEADER_STATIC {HB_REFERENCE_COUNT_INVALID}
178 static inline void *create (unsigned int size) {
179 hb_object_header_t *obj = (hb_object_header_t *) calloc (1, size);
187 inline void init (void) {
191 inline bool is_inert (void) const {
192 return unlikely (ref_count.is_invalid ());
195 inline void reference (void) {
196 if (unlikely (!this || this->is_inert ()))
201 inline bool destroy (void) {
202 if (unlikely (!this || this->is_inert ()))
204 if (ref_count.dec () != 1)
212 inline bool set_user_data (hb_user_data_key_t *key,
214 hb_destroy_func_t destroy) {
215 if (unlikely (!this || this->is_inert ()))
218 return user_data.set (key, data, destroy);
221 inline void *get_user_data (hb_user_data_key_t *key) {
222 return user_data.get (key);
225 inline void trace (const char *function) const {
226 (void) (HB_DEBUG_OBJECT &&
227 fprintf (stderr, "OBJECT(%p) refcount=%d %s\n",
229 this ? ref_count.get () : 0,
241 template <typename Type>
242 static inline void hb_object_trace (const Type *obj, const char *function)
244 obj->header.trace (function);
246 template <typename Type>
247 static inline Type *hb_object_create (void)
249 Type *obj = (Type *) hb_object_header_t::create (sizeof (Type));
250 hb_object_trace (obj, HB_FUNC);
253 template <typename Type>
254 static inline bool hb_object_is_inert (const Type *obj)
256 return unlikely (obj->header.is_inert ());
258 template <typename Type>
259 static inline Type *hb_object_reference (Type *obj)
261 hb_object_trace (obj, HB_FUNC);
262 obj->header.reference ();
265 template <typename Type>
266 static inline bool hb_object_destroy (Type *obj)
268 hb_object_trace (obj, HB_FUNC);
269 return obj->header.destroy ();
271 template <typename Type>
272 static inline bool hb_object_set_user_data (Type *obj,
273 hb_user_data_key_t *key,
275 hb_destroy_func_t destroy)
277 return obj->header.set_user_data (key, data, destroy);
280 template <typename Type>
281 static inline void *hb_object_get_user_data (Type *obj,
282 hb_user_data_key_t *key)
284 return obj->header.get_user_data (key);
293 #endif /* HB_OBJECT_PRIVATE_HH */