From 235889604e3a1276098b1968bb8d954ca1b4cc75 Mon Sep 17 00:00:00 2001
From: Timerix22 <timerix11@gmail.com>
Date: Tue, 9 Apr 2024 04:16:59 +0500
Subject: [PATCH] src/time/

---
 src/time/time.c | 48 ++++++++++++++++++++++++++++++++++++++++++++++++
 src/time/time.h | 30 ++++++++++++++++++++++++++++++
 2 files changed, 78 insertions(+)
 create mode 100644 src/time/time.c
 create mode 100644 src/time/time.h

diff --git a/src/time/time.c b/src/time/time.c
new file mode 100644
index 0000000..b932856
--- /dev/null
+++ b/src/time/time.c
@@ -0,0 +1,48 @@
+// posix version definition to use clock_gettime
+#ifndef _XOPEN_SOURCE 
+    #if __STDC_VERSION__ >= 199901L
+        #define _XOPEN_SOURCE 600
+    #else
+        #define _XOPEN_SOURCE 500
+    #endif
+#endif
+
+#include "time.h"
+#include <time.h>
+
+#define K 1000
+#define M 1000000
+#define G 1000000000
+
+nsec_t getTimeNsec(){
+    struct timespec t;
+    if(clock_gettime(CLOCK_REALTIME, &t) != 0)
+        throw(ERR_UNEXPECTEDVAL);
+    u64 n = t.tv_sec * G + t.tv_nsec;
+    return n;
+}
+
+usec_t getTimeUsec(){
+    struct timespec t;
+    if(clock_gettime(CLOCK_REALTIME, &t) != 0)
+        throw(ERR_UNEXPECTEDVAL);
+    u64 n = t.tv_sec * M + t.tv_nsec / K;
+    return n;
+}
+
+void sleepNsec(nsec_t time){
+    struct timespec t = {
+        .tv_sec = time / G,
+        .tv_nsec = time % G
+    };
+    if(nanosleep(&t, NULL) != 0)
+        throw(ERR_UNEXPECTEDVAL);
+}
+
+void sleepUsec(usec_t time){
+    sleepNsec(time * K);
+}
+
+void sleepMsec(msec_t time){
+    sleepNsec(time * M);
+}
diff --git a/src/time/time.h b/src/time/time.h
new file mode 100644
index 0000000..d478b34
--- /dev/null
+++ b/src/time/time.h
@@ -0,0 +1,30 @@
+#pragma once
+
+#if __cplusplus
+extern "C" {
+#endif
+
+#include "../base/base.h"
+
+/// nanoseconds
+typedef u64 nsec_t;
+/// microseconds
+typedef u64 usec_t;
+/// miliseconds
+typedef u64 msec_t;
+
+/// system time now in nanoseconds
+///@return u64 will overflow in 13 years
+nsec_t getTimeNsec();
+
+/// system time now in microseconds
+///@return u64 will overflow in 58494 years
+usec_t getTimeUsec();
+
+void sleepNsec(nsec_t time);
+void sleepUsec(usec_t time);
+void sleepMsec(msec_t time);
+
+#if __cplusplus
+}
+#endif