| 48 |
{ |
{ |
| 49 |
int i; |
int i; |
| 50 |
|
|
| 51 |
env->gc_limit= 20; |
env->gc_limit= 200; |
| 52 |
env->gc_count= 0; |
env->gc_count= 0; |
| 53 |
env->gc_ref= NULL; |
env->gc_ref= NULL; |
| 54 |
env->gc_protect= NULL; |
env->gc_protect= NULL; |
| 83 |
free(temp); /* Free the old top stack item */ |
free(temp); /* Free the old top stack item */ |
| 84 |
|
|
| 85 |
env->gc_limit--; |
env->gc_limit--; |
|
gc_init(env); |
|
| 86 |
} |
} |
| 87 |
|
|
| 88 |
/* Returns a pointer to a pointer to an element in the hash table. */ |
/* Returns a pointer to a pointer to an element in the hash table. */ |
| 127 |
env->gc_ref= nitem; |
env->gc_ref= nitem; |
| 128 |
|
|
| 129 |
env->gc_count++; |
env->gc_count++; |
| 130 |
|
nval->gc_garb= 1; |
|
protect(env, nval); |
|
|
gc_init(env); |
|
|
unprotect(env); |
|
| 131 |
|
|
| 132 |
return nval; |
return nval; |
| 133 |
} |
} |
| 134 |
|
|
| 135 |
/* Mark values recursively. |
/* Mark values recursively. |
| 136 |
Marked values are not collected by the GC. */ |
Marked values are not collected by the GC. */ |
| 137 |
void gc_mark(value *val) |
inline void gc_mark(value *val) |
| 138 |
{ |
{ |
| 139 |
stackitem *iterator; |
stackitem *iterator; |
| 140 |
|
|
| 141 |
if(val==NULL || val->gc_garb==0) |
if(val->gc_garb==0) |
| 142 |
return; |
return; |
| 143 |
|
|
| 144 |
val->gc_garb= 0; |
val->gc_garb= 0; |
| 153 |
} |
} |
| 154 |
} |
} |
| 155 |
|
|
| 156 |
|
inline void gc_maybe(environment *env) |
| 157 |
|
{ |
| 158 |
|
if(env->gc_count < env->gc_limit) |
| 159 |
|
return; |
| 160 |
|
else |
| 161 |
|
return gc_init(env); |
| 162 |
|
} |
| 163 |
|
|
| 164 |
/* Start GC */ |
/* Start GC */ |
| 165 |
extern void gc_init(environment *env) |
extern void gc_init(environment *env) |
| 166 |
{ |
{ |
| 168 |
symbol *tsymb; |
symbol *tsymb; |
| 169 |
int i; |
int i; |
| 170 |
|
|
|
if(env->gc_count < env->gc_limit) |
|
|
return; |
|
|
|
|
|
/* Garb by default */ |
|
|
iterator= env->gc_ref; |
|
|
while(iterator!=NULL) { |
|
|
iterator->item->gc_garb= 1; |
|
|
iterator= iterator->next; |
|
|
} |
|
|
|
|
| 171 |
/* Mark protected values */ |
/* Mark protected values */ |
| 172 |
iterator= env->gc_protect; |
iterator= env->gc_protect; |
| 173 |
while(iterator!=NULL) { |
while(iterator!=NULL) { |
| 186 |
for(i= 0; i<HASHTBLSIZE; i++) { |
for(i= 0; i<HASHTBLSIZE; i++) { |
| 187 |
tsymb= env->symbols[i]; |
tsymb= env->symbols[i]; |
| 188 |
while(tsymb!=NULL) { |
while(tsymb!=NULL) { |
| 189 |
gc_mark(tsymb->val); |
if (tsymb->val != NULL) |
| 190 |
|
gc_mark(tsymb->val); |
| 191 |
tsymb= tsymb->next; |
tsymb= tsymb->next; |
| 192 |
} |
} |
| 193 |
} |
} |
| 208 |
env->gc_ref->item->content.ptr= titem->next; |
env->gc_ref->item->content.ptr= titem->next; |
| 209 |
free(titem); |
free(titem); |
| 210 |
} |
} |
|
break; |
|
| 211 |
default: |
default: |
|
break; |
|
| 212 |
} |
} |
| 213 |
free(env->gc_ref->item); /* Remove from gc_ref */ |
free(env->gc_ref->item); /* Remove from gc_ref */ |
| 214 |
titem= env->gc_ref->next; |
titem= env->gc_ref->next; |
| 215 |
free(env->gc_ref); /* Remove value */ |
free(env->gc_ref); /* Remove value */ |
| 216 |
env->gc_ref= titem; |
env->gc_ref= titem; |
| 217 |
} else { /* Keep values */ |
continue; |
|
titem= env->gc_ref->next; |
|
|
env->gc_ref->next= new_head; |
|
|
new_head= env->gc_ref; |
|
|
env->gc_ref= titem; |
|
|
env->gc_count++; |
|
| 218 |
} |
} |
| 219 |
|
|
| 220 |
|
/* Keep values */ |
| 221 |
|
titem= env->gc_ref->next; |
| 222 |
|
env->gc_ref->next= new_head; |
| 223 |
|
new_head= env->gc_ref; |
| 224 |
|
new_head->item->gc_garb= 1; |
| 225 |
|
env->gc_ref= titem; |
| 226 |
|
env->gc_count++; |
| 227 |
} |
} |
| 228 |
|
|
| 229 |
env->gc_limit= env->gc_count*2; |
env->gc_limit= env->gc_count*2; |
| 609 |
|
|
| 610 |
eval_start: |
eval_start: |
| 611 |
|
|
| 612 |
|
gc_maybe(env); |
| 613 |
|
|
| 614 |
if(env->head==NULL) { |
if(env->head==NULL) { |
| 615 |
printerr("Too Few Arguments"); |
printerr("Too Few Arguments"); |
| 616 |
env->err=1; |
env->err=1; |
| 867 |
} |
} |
| 868 |
|
|
| 869 |
env->gc_limit= 0; |
env->gc_limit= 0; |
| 870 |
gc_init(env); |
gc_maybe(env); |
| 871 |
|
|
| 872 |
if(env->free_string!=NULL) |
if(env->free_string!=NULL) |
| 873 |
free(env->free_string); |
free(env->free_string); |
| 1006 |
toss(&myenv); /* No error check in main */ |
toss(&myenv); /* No error check in main */ |
| 1007 |
eval(&myenv); |
eval(&myenv); |
| 1008 |
} |
} |
| 1009 |
gc_init(&myenv); |
gc_maybe(&myenv); |
| 1010 |
} |
} |
| 1011 |
quit(&myenv); |
quit(&myenv); |
| 1012 |
return EXIT_FAILURE; |
return EXIT_FAILURE; |