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[lazy] Port more to it

This commit is contained in:
Behdad Esfahbod 2018-08-12 17:14:32 -07:00
parent 6901090945
commit a3b97db910
1 changed files with 38 additions and 37 deletions
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75
src/hb-shape.cc
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@ -32,6 +32,7 @@
#include "hb-shape-plan-private.hh" #include "hb-shape-plan-private.hh"
#include "hb-buffer-private.hh" #include "hb-buffer-private.hh"
#include "hb-font-private.hh" #include "hb-font-private.hh"
#include "hb-machinery-private.hh"
/** /**
* SECTION:hb-shape * SECTION:hb-shape
@ -45,21 +46,50 @@
* contains the output glyphs and their positions. * contains the output glyphs and their positions.
**/ **/
static hb_atomic_ptr_t <const char **> static_shaper_list;
static void free_static_shaper_list (void);
static struct hb_shaper_list_lazy_loader_t : hb_lazy_loader_t<const char *,
hb_shaper_list_lazy_loader_t>
{
static inline const char ** create (void)
{
const char **shaper_list = (const char **) calloc (1 + HB_SHAPERS_COUNT, sizeof (const char *));
if (unlikely (!shaper_list))
return nullptr;
const hb_shaper_pair_t *shapers = _hb_shapers_get ();
unsigned int i;
for (i = 0; i < HB_SHAPERS_COUNT; i++)
shaper_list[i] = shapers[i].name;
shaper_list[i] = nullptr;
#ifdef HB_USE_ATEXIT
atexit (free_static_shaper_list);
#endif
return shaper_list;
}
static inline void destroy (const char **l)
{
::free (l);
}
static inline const char ** get_null (void)
{
static const char *nil_shaper_list[] = {nullptr};
return nil_shaper_list;
}
} static_shaper_list;
#ifdef HB_USE_ATEXIT #ifdef HB_USE_ATEXIT
static static
void free_static_shaper_list (void) void free_static_shaper_list (void)
{ {
retry: static_shaper_list.free ();
const char **shaper_list = static_shaper_list.get ();
if (unlikely (!static_shaper_list.cmpexch (shaper_list, nullptr)))
goto retry;
free (shaper_list);
} }
#endif #endif
/** /**
* hb_shape_list_shapers: * hb_shape_list_shapers:
* *
@ -73,36 +103,7 @@ retry:
const char ** const char **
hb_shape_list_shapers (void) hb_shape_list_shapers (void)
{ {
retry: return static_shaper_list.get_unconst ();
const char **shaper_list = static_shaper_list.get ();
if (unlikely (!shaper_list))
{
/* Not found; allocate one. */
shaper_list = (const char **) calloc (1 + HB_SHAPERS_COUNT, sizeof (const char *));
if (unlikely (!shaper_list)) {
static const char *nil_shaper_list[] = {nullptr};
return nil_shaper_list;
}
const hb_shaper_pair_t *shapers = _hb_shapers_get ();
unsigned int i;
for (i = 0; i < HB_SHAPERS_COUNT; i++)
shaper_list[i] = shapers[i].name;
shaper_list[i] = nullptr;
if (unlikely (!static_shaper_list.cmpexch (nullptr, shaper_list)))
{
free (shaper_list);
goto retry;
}
#ifdef HB_USE_ATEXIT
atexit (free_static_shaper_list); /* First person registers atexit() callback. */
#endif
}
return shaper_list;
} }