#if !defined(__KVMGR_H__)

#define __KVMGR_H__ 1

#include "htab.h"
#include "mylock.h"
#include "xce/types.h"
#include "xlist.h"
#include "zarray.h"
#include "persist.h"

typedef enum {
    KVMGR_KEY_INT = 0,
    KVMGR_KEY_STRING
} kvmgr_key_type_t;

typedef struct {
    kvmgr_key_type_t key_type;
    uint32_t         nslots;
    uint32_t         delta;
    destroy_fn_t     datakiller;
} kvmgr_params_t;

extern typeinfo_t xkvmgr_type;

/*
 * kvmgr_capture_keys — capture key→index mappings for checkpoint
 * serialization (Part 3.8).
 *
 * Caller MUST hold the kvmgr write lock for the full duration of
 * this call.  The function allocates *keys_out and populates it with
 * *n_keys_out entries.  Each entry's key[] field is an owned deep
 * copy that remains valid after the write lock is released.
 *
 * Caller must free(*keys_out) when done.
 *
 * Returns  0 on success.
 * Returns -ENOMEM if allocation fails.
 */
int kvmgr_capture_keys(var          kvmgr,
                       slot_key_t** keys_out,
                       size_t*      n_keys_out);

#endif