/*
* The RWlock is used as expected except that we allow
* inc() to be called while holding it. This is because we're
* locking changes to the tree structure, not to the references.
* Inc() is expected to have its own locking.
*/
void*
lookupkey(Intmap *map, ulong id)
{
Intlist *f;
void *v;
rlock(map);
if(f = *llookup(map, id)){
v = f->aux;
map->inc(v);
}else
v = nil;
runlock(map);
return v;
}
/*
* The RWlock is used as expected except that we allow
* inc() to be called while holding it. This is because we're
* locking changes to the tree structure, not to the references.
* Inc() is expected to have its own locking.
*/
void*
lookupkey(Intmap *map, uint32_t id)
{
Intlist *f;
void *v;
rlock(&map->RWLock);
if((f = *llookup(map, id)) != nil){
v = f->aux;
map->inc(v);
}else
v = nil;
runlock(&map->RWLock);
return v;
}
void*
deletekey(Intmap *map, ulong id)
{
Intlist **lf, *f;
void *ov;
wlock(map);
if(f = *(lf = llookup(map, id))){
ov = f->aux;
*lf = f->link;
free(f);
}else
ov = nil;
wunlock(map);
return ov;
}
void*
deletekey(Intmap *map, uint32_t id)
{
Intlist **lf, *f;
void *ov;
wlock(&map->RWLock);
if((f = *(lf = llookup(map, id))) != nil){
ov = f->aux;
*lf = f->link;
free(f);
}else
ov = nil;
wunlock(&map->RWLock);
return ov;
}
void
insertnode(uint32_t key, uint32_t offset)
{
int i;
Node *n, **l;
l = llookup(key);
if(*l == nil){
if(l==&hash[key&(nhash-1)])
nnew++;
*l = allocnode();
(*l)->key = key;
}
n = *l;
/* add or replace last */
for(i=0; i<NOFF-1 && n->offset[i]!=-1; i++)
;
n->offset[i] = offset;
}
int
caninsertkey(Intmap *map, ulong id, void *v)
{
Intlist *f;
int rv;
ulong h;
wlock(map);
if(*llookup(map, id))
rv = 0;
else{
f = emalloc9p(sizeof *f);
f->id = id;
f->aux = v;
h = hashid(id);
f->link = map->hash[h];
map->hash[h] = f;
rv = 1;
}
wunlock(map);
return rv;
}
void*
insertkey(Intmap *map, ulong id, void *v)
{
Intlist *f;
void *ov;
ulong h;
wlock(map);
if(f = *llookup(map, id)){
/* no decrement for ov because we're returning it */
ov = f->aux;
f->aux = v;
}else{
f = emalloc9p(sizeof(*f));
f->id = id;
f->aux = v;
h = hashid(id);
f->link = map->hash[h];
map->hash[h] = f;
ov = nil;
}
wunlock(map);
return ov;
}
Node*
lookup(uint32_t key)
{
return *llookup(key);
}
