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

This reverts commit cef058be0d6ef5322f74e644bbcd96f1725c6327.
This commit is contained in:
Jan Nieuwenhuizen 2016-10-22 18:13:37 +02:00
parent 1684564ea1
commit 18aa0beaa9
1 changed files with 6 additions and 11 deletions
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17
mes.c
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@ -295,7 +295,7 @@ assq (scm *x, scm *a)
}
#define ENV_CACHE 1
#define CACHE_SIZE 50
#define CACHE_SIZE 30
#define ENV_HEAD 15
#if !ENV_CACHE
@ -328,16 +328,13 @@ cache_save (scm *p)
break;
}
if (env_cache_cars[i] == p->car) return &scm_unspecified;
if (n > -1 * env_cache_cars[i]->value) {
n = env_cache_cars[i]->value * -1;
if (n > env_cache_cars[i]->value) {
n = env_cache_cars[i]->value;
j = i;
}
}
if (j >= 0) {
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);
cache_threshold = p->car->value;
env_cache_cars[j] = p->car;
env_cache_cdrs[j] = p->cdr;
}
@ -359,8 +356,6 @@ 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;
}
@ -381,13 +376,13 @@ cache_invalidate_range (scm *p, scm *a)
scm *
assq_ref_cache (scm *x, scm *a)
{
x->value < 0 ? x->value-- : 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 /* && a->car->value > cache_threshold*/) cache_save (a->car);
if (i>ENV_HEAD) cache_save (a->car);
return a->car->cdr;
}
#endif // ENV_CACHE