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[cache] Use short instead of int if fits

This commit is contained in:
Behdad Esfahbod 2022-08-03 13:19:33 -06:00
parent d831e935df
commit 99070a734a
1 changed files with 6 additions and 3 deletions
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9
src/hb-cache.hh
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@ -38,11 +38,15 @@ template <unsigned int key_bits=16,
bool thread_safe=true>
struct hb_cache_t
{
using item_t = typename std::conditional<thread_safe, hb_atomic_int_t, int>::type;
using item_t = typename std::conditional<thread_safe,
hb_atomic_int_t,
typename std::conditional<key_bits + value_bits - cache_bits <= 16,
short,
int>::type
>::type;
static_assert ((key_bits >= cache_bits), "");
static_assert ((key_bits + value_bits - cache_bits <= 8 * sizeof (item_t)), "");
static_assert (sizeof (item_t) == sizeof (unsigned int), "");
void init () { clear (); }
void fini () {}
@ -78,7 +82,6 @@ struct hb_cache_t
item_t values[1u<<cache_bits];
};
template <bool thread_safe = true>
using hb_cmap_cache_t = hb_cache_t<21, 16, 8, thread_safe>;