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#pragma once
#include <kernel/handle.h>
#define HANDLE_MAX 16
typedef struct {
uint64_t refcount;
Handle *h[HANDLE_MAX];
} HandleSet;
/** initialize HandleSets with a refcount of 1 */
HandleSet *hs_init(void);
HandleSet *hs_copy(HandleSet *from);
void hs_unref(HandleSet *hs);
/** finds the first free handle >= start. returns -1 on failure */
hid_t hs_findfree(HandleSet *hs, hid_t start);
Handle *hs_get(HandleSet *hs, hid_t id);
/** creates a new handle. returns -1 on failure */
hid_t hs_hinit(HandleSet *hs, enum handle_type type, Handle **hp);
hid_t hs_dup(HandleSet *hs, hid_t from, hid_t to, int flags);
static inline void
hs_close(HandleSet *hs, hid_t hid) {
hs_dup(hs, -1, hid, 0);
}
/** Gets a handle and removes the set's reference to it, without decreasing
* the refcount. Meant to be used together with hs_put. */
Handle *hs_take(HandleSet *hs, hid_t hid);
/* Put a handle into a set, taking the ownership away from the caller.
* Doesn't increase the refcount on success, decreases it on failure. */
hid_t hs_put(HandleSet *hs, Handle *h);
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