artemist/mes
1
0
Fork 0
Code Issues Pull requests Packages Projects Releases Wiki Activity

Flip sign of cached symbols: only search cache if symbol is cached.

Browse source 
* mes.c (cache_save): Flip sign when caching and invalidating.
  (cache_invalidate): Flip sign when invalidating.
This commit is contained in:
Jan Nieuwenhuizen 2016-10-21 20:44:18 +02:00
parent bca8061232
commit 1684564ea1
1 changed files with 11 additions and 6 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

17
mes.c
View file

@ -295,7 +295,7 @@ assq (scm *x, scm *a)
}
#define ENV_CACHE 1
#define CACHE_SIZE 30
#define CACHE_SIZE 50
#define ENV_HEAD 15
#if !ENV_CACHE
@ -328,13 +328,16 @@ cache_save (scm *p)
break;
}
if (env_cache_cars[i] == p->car) return &scm_unspecified;
if (n > env_cache_cars[i]->value) {
n = env_cache_cars[i]->value;
if (n > -1 * env_cache_cars[i]->value) {
n = env_cache_cars[i]->value * -1;
j = i;
}
}
if (j >= 0) {
cache_threshold = p->car->value;
cache_threshold = p->car->value * -1;
p->car->value *= -1;
if (env_cache_cars[j]) env_cache_cars[j]->value *= -1;
//fprintf (stderr, "caching: %s [%d]\n", p->car->name, p->car->value);
env_cache_cars[j] = p->car;
env_cache_cdrs[j] = p->cdr;
}
@ -356,6 +359,8 @@ cache_invalidate (scm *x)
{
for (int i=0; i < CACHE_SIZE; i++) {
if (env_cache_cars[i] == x) {
x->value *= -1;
//fprintf (stderr, "dropping: %s [%d]\n", env_cache_cars[i]->name, env_cache_cars[i]->value);
env_cache_cars[i] = 0;
break;
}
@ -376,13 +381,13 @@ cache_invalidate_range (scm *p, scm *a)
scm *
assq_ref_cache (scm *x, scm *a)
{
x->value++;
x->value < 0 ? x->value-- : x->value++;
scm *c = cache_lookup (x);
if (c != &scm_undefined) return c;
int i = 0;
while (a != &scm_nil && x != a->car->car) {i++;a = a->cdr;}
if (a == &scm_nil) return &scm_undefined;
if (i>ENV_HEAD) cache_save (a->car);
if (i>ENV_HEAD /* && a->car->value > cache_threshold*/) cache_save (a->car);
return a->car->cdr;
}
#endif // ENV_CACHE