LCOV - app.info - gfx/harfbuzz/src/hb-object-private.hh

LCOV - code coverage report
| Current view: | directory - gfx/harfbuzz/src - hb-object-private.hh (source / functions) |  | Found | Hit | Coverage |
| Test: | app.info | Lines: | 60 | 1 | 1.7 %
| Date: | 2012-07-07 | Functions: | 59 | 1 | 1.7 %

           1                 : /*
           2                 :  * Copyright © 2007  Chris Wilson
           3                 :  * Copyright © 2009,2010  Red Hat, Inc.
           4                 :  * Copyright © 2011  Google, Inc.
           5                 :  *
           6                 :  *  This is part of HarfBuzz, a text shaping library.
           7                 :  *
           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.
          13                 :  *
          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
          18                 :  * DAMAGE.
          19                 :  *
          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.
          25                 :  *
          26                 :  * Contributor(s):
          27                 :  *      Chris Wilson <chris@chris-wilson.co.uk>
          28                 :  * Red Hat Author(s): Behdad Esfahbod
          29                 :  * Google Author(s): Behdad Esfahbod
          30                 :  */
          31                 :
          32                 : #ifndef HB_OBJECT_PRIVATE_HH
          33                 : #define HB_OBJECT_PRIVATE_HH
          34                 :
          35                 : #include "hb-private.hh"
          36                 :
          37                 : #include "hb-mutex-private.hh"
          38                 :
          39                 :
          40                 :
          41                 : /* Debug */
          42                 :
          43                 : #ifndef HB_DEBUG_OBJECT
          44                 : #define HB_DEBUG_OBJECT (HB_DEBUG+0)
          45                 : #endif
          46                 :
          47                 :
          48                 : /* atomic_int */
          49                 :
          50                 : /* We need external help for these */
          51                 :
          52                 : #ifdef HAVE_GLIB
          53                 :
          54                 : #include <glib.h>
          55                 :
          56                 : typedef volatile int hb_atomic_int_t;
          57                 : #if GLIB_CHECK_VERSION(2,29,5)
          58                 : #define hb_atomic_int_add(AI, V)        g_atomic_int_add (&(AI), V)
          59                 : #else
          60                 : #define hb_atomic_int_add(AI, V)        g_atomic_int_exchange_and_add (&(AI), V)
          61                 : #endif
          62                 : #define hb_atomic_int_get(AI)           g_atomic_int_get (&(AI))
          63                 : #define hb_atomic_int_set(AI, V)        g_atomic_int_set (&(AI), V)
          64                 :
          65                 :
          66                 : #elif defined(_MSC_VER) && _MSC_VER >= 1600
          67                 :
          68                 : #include <intrin.h>
          69                 :
          70                 : typedef long hb_atomic_int_t;
          71                 : #define hb_atomic_int_add(AI, V)        _InterlockedExchangeAdd (&(AI), V)
          72                 : #define hb_atomic_int_get(AI)           (_ReadBarrier (), (AI))
          73                 : #define hb_atomic_int_set(AI, V)        ((void) _InterlockedExchange (&(AI), (V)))
          74                 :
          75                 :
          76                 : #else
          77                 :
          78                 : #ifdef _MSC_VER
          79                 : #pragma message("Could not find any system to define atomic_int macros, library will NOT be thread-safe")
          80                 : #else
          81                 : #warning "Could not find any system to define atomic_int macros, library will NOT be thread-safe"
          82                 : #endif
          83                 :
          84                 : typedef volatile int hb_atomic_int_t;
          85                 : #define hb_atomic_int_add(AI, V)        ((AI) += (V), (AI) - (V))
          86                 : #define hb_atomic_int_get(AI)           (AI)
          87                 : #define hb_atomic_int_set(AI, V)        ((void) ((AI) = (V)))
          88                 :
          89                 :
          90                 : #endif
          91                 :
          92                 :
          93                 :
          94                 :
          95                 : /* reference_count */
          96                 :
          97                 : typedef struct {
          98                 :   hb_atomic_int_t ref_count;
          99                 :
         100                 : #define HB_REFERENCE_COUNT_INVALID_VALUE ((hb_atomic_int_t) -1)
         101                 : #define HB_REFERENCE_COUNT_INVALID {HB_REFERENCE_COUNT_INVALID_VALUE}
         102                 :
         103               0 :   inline void init (int v) { ref_count = v; /* non-atomic is fine */ }
         104               0 :   inline int inc (void) { return hb_atomic_int_add (ref_count,  1); }
         105               0 :   inline int dec (void) { return hb_atomic_int_add (ref_count, -1); }
         106                 :   inline void set (int v) { hb_atomic_int_set (ref_count, v); }
         107                 :
         108               0 :   inline int get (void) const { return hb_atomic_int_get (ref_count); }
         109               0 :   inline bool is_invalid (void) const { return get () == HB_REFERENCE_COUNT_INVALID_VALUE; }
         110                 :
         111                 : } hb_reference_count_t;
         112                 :
         113                 :
         114                 : /* user_data */
         115                 :
         116            8784 : struct hb_user_data_array_t {
         117                 :
         118                 :   struct hb_user_data_item_t {
         119                 :     hb_user_data_key_t *key;
         120                 :     void *data;
         121                 :     hb_destroy_func_t destroy;
         122                 :
         123               0 :     inline bool operator == (hb_user_data_key_t *other_key) const { return key == other_key; }
         124               0 :     inline bool operator == (hb_user_data_item_t &other) const { return key == other.key; }
         125                 :
         126               0 :     void finish (void) { if (destroy) destroy (data); }
         127                 :   };
         128                 :
         129                 :   hb_lockable_set_t<hb_user_data_item_t, hb_static_mutex_t> items;
         130                 :
         131                 :   HB_INTERNAL bool set (hb_user_data_key_t *key,
         132                 :                         void *              data,
         133                 :                         hb_destroy_func_t   destroy,
         134                 :                         hb_bool_t           replace);
         135                 :
         136                 :   HB_INTERNAL void *get (hb_user_data_key_t *key);
         137                 :
         138                 :   HB_INTERNAL void finish (void);
         139                 : };
         140                 :
         141                 :
         142                 : /* object_header */
         143                 :
         144                 : typedef struct _hb_object_header_t hb_object_header_t;
         145                 :
         146                 : struct _hb_object_header_t {
         147                 :   hb_reference_count_t ref_count;
         148                 :   hb_user_data_array_t user_data;
         149                 :
         150                 : #define HB_OBJECT_HEADER_STATIC {HB_REFERENCE_COUNT_INVALID}
         151                 :
         152               0 :   static inline void *create (unsigned int size) {
         153               0 :     hb_object_header_t *obj = (hb_object_header_t *) calloc (1, size);
         154                 :
         155               0 :     if (likely (obj))
         156               0 :       obj->init ();
         157                 :
         158               0 :     return obj;
         159                 :   }
         160                 :
         161               0 :   inline void init (void) {
         162               0 :     ref_count.init (1);
         163               0 :   }
         164                 :
         165               0 :   inline bool is_inert (void) const {
         166               0 :     return unlikely (ref_count.is_invalid ());
         167                 :   }
         168                 :
         169               0 :   inline void reference (void) {
         170               0 :     if (unlikely (!this || this->is_inert ()))
         171               0 :       return;
         172               0 :     ref_count.inc ();
         173                 :   }
         174                 :
         175               0 :   inline bool destroy (void) {
         176               0 :     if (unlikely (!this || this->is_inert ()))
         177               0 :       return false;
         178               0 :     if (ref_count.dec () != 1)
         179               0 :       return false;
         180                 :
         181               0 :     ref_count.init (HB_REFERENCE_COUNT_INVALID_VALUE);
         182                 :
         183               0 :     user_data.finish ();
         184                 :
         185               0 :     return true;
         186                 :   }
         187                 :
         188               0 :   inline bool set_user_data (hb_user_data_key_t *key,
         189                 :                              void *              data,
         190                 :                              hb_destroy_func_t   destroy_func,
         191                 :                              hb_bool_t           replace) {
         192               0 :     if (unlikely (!this || this->is_inert ()))
         193               0 :       return false;
         194                 :
         195               0 :     return user_data.set (key, data, destroy_func, replace);
         196                 :   }
         197                 :
         198               0 :   inline void *get_user_data (hb_user_data_key_t *key) {
         199               0 :     return user_data.get (key);
         200                 :   }
         201                 :
         202               0 :   inline void trace (const char *function) const {
         203                 :     DEBUG_MSG (OBJECT, (void *) this,
         204                 :                "refcount=%d %s",
         205                 :                this ? ref_count.get () : 0,
         206               0 :                function);
         207               0 :   }
         208                 :
         209                 : };
         210                 :
         211                 :
         212                 :
         213                 :
         214                 : /* object */
         215                 :
         216                 : template <typename Type>
         217               0 : static inline void hb_object_trace (const Type *obj, const char *function)
         218                 : {
         219               0 :   obj->header.trace (function);
         220               0 : }
         221                 : template <typename Type>
         222               0 : static inline Type *hb_object_create (void)
         223                 : {
         224               0 :   Type *obj = (Type *) hb_object_header_t::create (sizeof (Type));
         225               0 :   hb_object_trace (obj, HB_FUNC);
         226               0 :   return obj;
         227                 : }
         228                 : template <typename Type>
         229               0 : static inline bool hb_object_is_inert (const Type *obj)
         230                 : {
         231               0 :   return unlikely (obj->header.is_inert ());
         232                 : }
         233                 : template <typename Type>
         234               0 : static inline Type *hb_object_reference (Type *obj)
         235                 : {
         236               0 :   hb_object_trace (obj, HB_FUNC);
         237               0 :   obj->header.reference ();
         238               0 :   return obj;
         239                 : }
         240                 : template <typename Type>
         241               0 : static inline bool hb_object_destroy (Type *obj)
         242                 : {
         243               0 :   hb_object_trace (obj, HB_FUNC);
         244               0 :   return obj->header.destroy ();
         245                 : }
         246                 : template <typename Type>
         247               0 : static inline bool hb_object_set_user_data (Type               *obj,
         248                 :                                             hb_user_data_key_t *key,
         249                 :                                             void *              data,
         250                 :                                             hb_destroy_func_t   destroy,
         251                 :                                             hb_bool_t           replace)
         252                 : {
         253               0 :   return obj->header.set_user_data (key, data, destroy, replace);
         254                 : }
         255                 :
         256                 : template <typename Type>
         257               0 : static inline void *hb_object_get_user_data (Type               *obj,
         258                 :                                              hb_user_data_key_t *key)
         259                 : {
         260               0 :   return obj->header.get_user_data (key);
         261                 : }
         262                 :
         263                 :
         264                 :
         265                 :
         266                 :
         267                 : #endif /* HB_OBJECT_PRIVATE_HH */

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