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#include "ref.h"
#include "util.h"
struct ref *
ref_init(void *data)
{
struct ref *ref;
ref = malloc(sizeof(struct ref));
ASSERT(ref != NULL);
ref->link = LINK_EMPTY;
ref->data = data;
return ref;
}
void
ref_free(void *ref)
{
free(ref);
}
void
refs_free(struct link *head)
{
list_free(head, ref_free, LINK_OFFSET(struct ref));
}
static struct link *
refs_ffind(struct link *head, void *data)
{
struct link *iter;
for (iter = head->next; iter; iter = iter->next) {
if (UPCAST(iter, struct ref)->data == data)
return iter;
}
return NULL;
}
int
refs_incl(struct link *head, void *data)
{
struct link *ref;
ref = refs_ffind(head, data);
return ref != NULL;
}
void
refs_rm(struct link *head, void *data)
{
struct link *ref;
struct ref *dataref;
ref = refs_ffind(head, data);
if (!ref) return;
dataref = UPCAST(ref, struct ref);
link_pop(ref);
free(dataref);
}
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