--- Libc/Libc-763.13/include/time.h
+++ Libc/Libc-1583.60.2/include/time.h
@@ -64,28 +64,14 @@
 #define	_TIME_H_
 
 #include <_types.h>
-
-#define __need_struct_timespec
-#include <_structs.h>
-
-#ifndef NULL
-#define NULL __DARWIN_NULL
-#endif /* ! NULL */
-
-#ifndef	_CLOCK_T
-#define _CLOCK_T
-typedef	__darwin_clock_t	clock_t;
-#endif
-
-#ifndef	_SIZE_T
-#define	_SIZE_T
-typedef	__darwin_size_t		size_t;
-#endif
-
-#ifndef	_TIME_T
-#define	_TIME_T
-typedef	__darwin_time_t		time_t;
-#endif
+#include <sys/cdefs.h>
+#include <Availability.h>
+#ifndef UNIFDEF_DRIVERKIT
+#include <sys/_types/_clock_t.h>
+#include <sys/_types/_null.h>
+#include <sys/_types/_size_t.h>
+#include <sys/_types/_time_t.h>
+#include <sys/_types/_timespec.h>
 
 struct tm {
 	int	tm_sec;		/* seconds after the minute [0-60] */
@@ -97,16 +83,16 @@
 	int	tm_wday;	/* days since Sunday [0-6] */
 	int	tm_yday;	/* days since January 1 [0-365] */
 	int	tm_isdst;	/* Daylight Savings Time flag */
-	long	tm_gmtoff;	/* offset from CUT in seconds */
+	long	tm_gmtoff;	/* offset from UTC in seconds */
 	char	*tm_zone;	/* timezone abbreviation */
 };
 
 #if __DARWIN_UNIX03
-#define CLOCKS_PER_SEC  1000000	/* [XSI] */
+#define CLOCKS_PER_SEC  ((clock_t)1000000)	/* [XSI] */
 #else /* !__DARWIN_UNIX03 */
 #include <machine/_limits.h>	/* Include file containing CLK_TCK. */
 
-#define CLOCKS_PER_SEC  (__DARWIN_CLK_TCK)
+#define CLOCKS_PER_SEC  ((clock_t)(__DARWIN_CLK_TCK))
 #endif /* __DARWIN_UNIX03 */
 
 #ifndef _ANSI_SOURCE
@@ -126,8 +112,12 @@
 //End-Libc
 #endif /* __DARWIN_UNIX03 */
 extern int daylight;
+#else /* UNIFDEF_DRIVERKIT */
+#include <sys/_types/_time_t.h>
+#endif /* UNIFDEF_DRIVERKIT */
 
 __BEGIN_DECLS
+#ifndef UNIFDEF_DRIVERKIT
 char *asctime(const struct tm *);
 //Begin-Libc
 #ifndef LIBC_ALIAS_CLOCK
@@ -197,13 +187,78 @@
 //Begin-Libc
 #ifndef LIBC_ALIAS_NANOSLEEP
 //End-Libc
-int nanosleep(const struct timespec *, struct timespec *) __DARWIN_ALIAS_C(nanosleep);
+int nanosleep(const struct timespec *__rqtp, struct timespec *__rmtp) __DARWIN_ALIAS_C(nanosleep);
 //Begin-Libc
 #else /* LIBC_ALIAS_NANOSLEEP */
-int nanosleep(const struct timespec *, struct timespec *) LIBC_ALIAS_C(nanosleep);
+int nanosleep(const struct timespec *__rqtp, struct timespec *__rmtp) LIBC_ALIAS_C(nanosleep);
 #endif /* !LIBC_ALIAS_NANOSLEEP */
 //End-Libc
 #endif
+#endif /* UNIFDEF_DRIVERKIT */
+
+#if !defined(_DARWIN_FEATURE_CLOCK_GETTIME) || _DARWIN_FEATURE_CLOCK_GETTIME != 0
+#if __DARWIN_C_LEVEL >= 199309L
+#if __has_feature(enumerator_attributes)
+#define __CLOCK_AVAILABILITY __OSX_AVAILABLE(10.12) __IOS_AVAILABLE(10.0) __TVOS_AVAILABLE(10.0) __WATCHOS_AVAILABLE(3.0)
+#else
+#define __CLOCK_AVAILABILITY
+#endif
+
+typedef enum {
+_CLOCK_REALTIME __CLOCK_AVAILABILITY = 0,
+#define CLOCK_REALTIME _CLOCK_REALTIME
+_CLOCK_MONOTONIC __CLOCK_AVAILABILITY = 6,
+#define CLOCK_MONOTONIC _CLOCK_MONOTONIC
+#if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)
+_CLOCK_MONOTONIC_RAW __CLOCK_AVAILABILITY = 4,
+#define CLOCK_MONOTONIC_RAW _CLOCK_MONOTONIC_RAW
+_CLOCK_MONOTONIC_RAW_APPROX __CLOCK_AVAILABILITY = 5,
+#define CLOCK_MONOTONIC_RAW_APPROX _CLOCK_MONOTONIC_RAW_APPROX
+_CLOCK_UPTIME_RAW __CLOCK_AVAILABILITY = 8,
+#define CLOCK_UPTIME_RAW _CLOCK_UPTIME_RAW
+_CLOCK_UPTIME_RAW_APPROX __CLOCK_AVAILABILITY = 9,
+#define CLOCK_UPTIME_RAW_APPROX _CLOCK_UPTIME_RAW_APPROX
+#endif
+_CLOCK_PROCESS_CPUTIME_ID __CLOCK_AVAILABILITY = 12,
+#define CLOCK_PROCESS_CPUTIME_ID _CLOCK_PROCESS_CPUTIME_ID
+_CLOCK_THREAD_CPUTIME_ID __CLOCK_AVAILABILITY = 16
+#define CLOCK_THREAD_CPUTIME_ID _CLOCK_THREAD_CPUTIME_ID
+} clockid_t;
+
+#ifndef UNIFDEF_DRIVERKIT
+__CLOCK_AVAILABILITY
+int clock_getres(clockid_t __clock_id, struct timespec *__res);
+
+__CLOCK_AVAILABILITY
+int clock_gettime(clockid_t __clock_id, struct timespec *__tp);
+
+#endif /* UNIFDEF_DRIVERKIT */
+#if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)
+__CLOCK_AVAILABILITY
+__uint64_t clock_gettime_nsec_np(clockid_t __clock_id);
+#endif
+
+#ifndef UNIFDEF_DRIVERKIT
+__OSX_AVAILABLE(10.12) __IOS_PROHIBITED
+__TVOS_PROHIBITED __WATCHOS_PROHIBITED
+int clock_settime(clockid_t __clock_id, const struct timespec *__tp);
+
+#endif /* UNIFDEF_DRIVERKIT */
+#undef __CLOCK_AVAILABILITY
+#endif /* __DARWIN_C_LEVEL */
+#endif /* _DARWIN_FEATURE_CLOCK_GETTIME */
+
+#ifndef UNIFDEF_DRIVERKIT
+#if (__DARWIN_C_LEVEL >= __DARWIN_C_FULL) || \
+        (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L) || \
+        (defined(__cplusplus) && __cplusplus >= 201703L)
+/* ISO/IEC 9899:201x 7.27.2.5 The timespec_get function */
+#define TIME_UTC	1	/* time elapsed since epoch */
+__API_AVAILABLE(macosx(10.15), ios(13.0), tvos(13.0), watchos(6.0))
+int timespec_get(struct timespec *ts, int base);
+#endif
+
+#endif /* UNIFDEF_DRIVERKIT */
 __END_DECLS
 
 #ifdef _USE_EXTENDED_LOCALES_