---
name: "atomic64_sub_and_test"
section: "9"
platform: "linux"
package: "linux-manual-2.6.32"
version: "2.6.32-48squeeze6"
release: "Debian 6.0 (Squeeze)"
platforms: ["linux"]
url: "https://new.carta.tech/atomic64_sub_and_test"
---

# atomic64\_sub\_and\_test(9)

subtract value from variable and test result

## NAME

atomic64\_sub\_and\_test - subtract value from variable and test result

## SYNOPSIS

**int atomic64\_sub\_and\_test(u64** *delta***, atomic64\_t \*** *ptr***);**

## ARGUMENTS

*delta*

integer value to subtract

*ptr*

pointer to type atomic64\_t

## DESCRIPTION

Atomically subtracts *delta* from *ptr* and returns true if the result is zero, or false for all other cases.

## COPYRIGHT