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[VARC] Fix buffer scratch borrowing

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This commit is contained in:
Behdad Esfahbod 2025-02-25 11:35:21 -07:00
parent e76b689fe1
commit f71faf5fec
1 changed files with 3 additions and 11 deletions
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14
src/OT/Var/VARC/VARC.hh
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@ -162,24 +162,16 @@ struct VARC
{
if (!table->has_data ()) return false;
hb_glyf_scratch_t *scratch = nullptr;
hb_glyf_scratch_t *scratch;
// Borrow the cached strach buffer.
retry:
{
scratch = cached_scratch.get_relaxed ();
if (!scratch)
scratch = cached_scratch.get_acquire ();
if (!scratch || unlikely (!cached_scratch.cmpexch (scratch, nullptr)))
{
scratch = (hb_glyf_scratch_t *) hb_calloc (1, sizeof (hb_glyf_scratch_t));
if (unlikely (!scratch))
return true;
if (!cached_scratch.cmpexch (scratch, nullptr))
{
scratch->~hb_glyf_scratch_t ();
hb_free (scratch);
goto retry;
}
}
}