#ifndef SP_UID_H
#define SP_UID_H

#pragma once

#ifdef __cplusplus
extern "C" {
#endif

#include "y2k_time.h"

typedef u__int64_t sp_uid_t;
typedef struct sp_uid_generator_t sp_uid_generator_t; 

// uid_t is conflict with defined type in sys/types.h [3/19/2020 12:10 Gifur]
struct _sp_uid_t {
	union {
		u__int64_t id;
		struct {
			unsigned short app_id;
			unsigned short dsn;
			unsigned int tick;
		};
	};
};

sp_uid_generator_t *sp_uid_generator_create(unsigned short app_id, int mt);
void sp_uid_generator_destroy(sp_uid_generator_t *uid);
sp_uid_t sp_uid_generator_new_id(sp_uid_generator_t *uid);

sp_uid_t sp_uid_make(unsigned short app_id);
sp_uid_t sp_uid_update(sp_uid_t t);

static __inline unsigned int sp_uid_get_tick_part(sp_uid_t t)
{
	struct _sp_uid_t r;
	r.id = t;
	return r.tick;
}

static __inline sp_uid_t sp_uid_change_app_id(sp_uid_t t, unsigned short app_id)
{
	struct _sp_uid_t r;
	r.id = t;
	r.app_id = app_id;
	return r.id;
}

#ifdef __cplusplus
} // extern "C" {
#endif

#endif // SP_UID_H