From f5c4671bfbad96bf346bd7e9a21fc4317b4959df Mon Sep 17 00:00:00 2001
From: Indrajith K L
Date: Sat, 3 Dec 2022 17:00:20 +0530
Subject: Adds most of the tools

---
 v_windows/v/old/vlib/time/time_darwin.c.v | 84 +++++++++++++++++++++++++++++++
 1 file changed, 84 insertions(+)
 create mode 100644 v_windows/v/old/vlib/time/time_darwin.c.v

(limited to 'v_windows/v/old/vlib/time/time_darwin.c.v')

diff --git a/v_windows/v/old/vlib/time/time_darwin.c.v b/v_windows/v/old/vlib/time/time_darwin.c.v
new file mode 100644
index 0000000..d16c66b
--- /dev/null
+++ b/v_windows/v/old/vlib/time/time_darwin.c.v
@@ -0,0 +1,84 @@
+module time
+
+#include <mach/mach_time.h>
+
+const (
+	// start_time is needed on Darwin and Windows because of potential overflows
+	start_time = C.mach_absolute_time()
+	time_base  = init_time_base()
+)
+
+[typedef]
+struct C.mach_timebase_info_data_t {
+	numer u32
+	denom u32
+}
+
+fn C.mach_absolute_time() u64
+
+fn C.mach_timebase_info(&C.mach_timebase_info_data_t)
+
+fn C.clock_gettime_nsec_np(int) u64
+
+struct InternalTimeBase {
+	numer u32 = 1
+	denom u32 = 1
+}
+
+pub struct C.timeval {
+	tv_sec  u64
+	tv_usec u64
+}
+
+fn init_time_base() C.mach_timebase_info_data_t {
+	tb := C.mach_timebase_info_data_t{}
+	C.mach_timebase_info(&tb)
+	return C.mach_timebase_info_data_t{
+		numer: tb.numer
+		denom: tb.denom
+	}
+}
+
+fn sys_mono_now_darwin() u64 {
+	tm := C.mach_absolute_time()
+	if time.time_base.denom == 0 {
+		C.mach_timebase_info(&time.time_base)
+	}
+	return (tm - time.start_time) * time.time_base.numer / time.time_base.denom
+}
+
+// NB: vpc_now_darwin is used by `v -profile` .
+// It should NOT call *any other v function*, just C functions and casts.
+[inline]
+fn vpc_now_darwin() u64 {
+	tm := C.mach_absolute_time()
+	if time.time_base.denom == 0 {
+		C.mach_timebase_info(&time.time_base)
+	}
+	return (tm - time.start_time) * time.time_base.numer / time.time_base.denom
+}
+
+// darwin_now returns a better precision current time for Darwin based operating system
+// this should be implemented with native system calls eventually
+// but for now a bit tweaky. It uses the deprecated  gettimeofday clock to get
+// the microseconds seconds part and converts to local time
+fn darwin_now() Time {
+	// get the high precision time as UTC clock
+	tv := C.timeval{}
+	C.gettimeofday(&tv, 0)
+	loc_tm := C.tm{}
+	asec := voidptr(&tv.tv_sec)
+	C.localtime_r(asec, &loc_tm)
+	return convert_ctime(loc_tm, int(tv.tv_usec))
+}
+
+// darwin_utc returns a better precision current time for Darwin based operating system
+// this should be implemented with native system calls eventually
+// but for now a bit tweaky. It uses the deprecated  gettimeofday clock to get
+// the microseconds seconds part and normal local time to get correct local time
+fn darwin_utc() Time {
+	// get the high precision time as UTC clock
+	tv := C.timeval{}
+	C.gettimeofday(&tv, 0)
+	return unix2(i64(tv.tv_sec), int(tv.tv_usec))
+}
-- 
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