#include <sys/time.h>
#include <pthread.h>

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "base.h"
#include "singleton.h"

static Singleton* Singleton_construct(void* addr);

static pthread_once_t once_control = PTHREAD_ONCE_INIT;
static Singleton* singleton = NULL;

Singleton* Singleton_construct(void* addr)
{
 if (addr == NULL) {
 return NULL;
 }

 struct timeval tv;

 int errCode = gettimeofday(&tv, NULL);

 if (errCode) {
 fprintf(stderr, "gettimeofday error. [err=%s]",
 strerror(errCode));
 abort();
 }

 Singleton* singleton = addr;
 singleton->currentTime = tv.tv_sec * 1000000 + tv.tv_usec;

 return singleton;
}

Singleton* getSingleton()
{
 void init() {
 singleton = new(Singleton);

 if (singleton == NULL) {
 fprintf(stderr, "Fail to new singleton.\n");
 abort();
 }
 }

 int errCode = pthread_once(&once_control, init);

 if (errCode) {
 fprintf(stderr, "pthread_once error. [err=%s]",
 strerror(errCode));
 abort();
 }

 return singleton;
}