---
name: "iv_time"
section: "3"
platform: "linux"
package: "libivykis-dev"
version: "0.43.2-1+b1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/iv_time"
---

# iv\_time(3)

ivykis time handling

## NAME

iv\_now, iv\_validate\_now, iv\_invalidate\_now - ivykis time handling

## SYNOPSIS

**#include \<iv.h\>**

**extern struct timespec** *iv\_now***;**\
 **void iv\_validate\_now(void);**\
 **void iv\_invalidate\_now(void);**\

## DESCRIPTION

**iv\_now** is a global variable that represents a monotonic timer.

The contents of **iv\_now** might be stale.  Calling the function **iv\_validate\_now** ensures that the current contents of **iv\_now** are up-to-date.

The function **iv\_invalidate\_now** is called to invalidate the currently cached time.  This function should be called after any operation that takes a significant amount of wall clock time.

## SEE ALSO

[**ivykis**(3)](/ivykis/3.md), [**iv\_examples**(3)](/iv_examples/3.md)