---
name: "zmq_atomic_counter_set"
section: "3"
platform: "linux"
package: "zeromq"
version: "4.3.5-3"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/zmq_atomic_counter_set"
---

# zmq\_atomic\_counter\_set(3)

set atomic counter to new value

## NAME

zmq\_atomic\_counter\_set - set atomic counter to new value

## SYNOPSIS

**void zmq\_atomic\_counter\_set (void \*counter, int value);**

## DESCRIPTION

The *zmq\_atomic\_counter\_set* function sets the counter to a new value, in a threadsafe fashion. The largest value that is guaranteed to work across all platforms is 2^31-1. This function uses platform specific atomic operations.

## RETURN VALUE

The *zmq\_atomic\_counter\_set()* function has no return value.

## EXAMPLE

**Test code for atomic counters**.

```
void *counter = zmq_atomic_counter_new ();
assert (zmq_atomic_counter_value (counter) == 0);
assert (zmq_atomic_counter_inc (counter) == 0);
assert (zmq_atomic_counter_inc (counter) == 1);
assert (zmq_atomic_counter_inc (counter) == 2);
assert (zmq_atomic_counter_value (counter) == 3);
assert (zmq_atomic_counter_dec (counter) == 1);
assert (zmq_atomic_counter_dec (counter) == 1);
assert (zmq_atomic_counter_dec (counter) == 0);
zmq_atomic_counter_set (counter, 2);
assert (zmq_atomic_counter_dec (counter) == 1);
assert (zmq_atomic_counter_dec (counter) == 0);
zmq_atomic_counter_destroy (&counter);
return 0;
```

## SEE ALSO

[**zmq\_atomic\_counter\_new**(3)](/zmq_atomic_counter_new/3.md) [**zmq\_atomic\_counter\_inc**(3)](/zmq_atomic_counter_inc/3.md) [**zmq\_atomic\_counter\_dec**(3)](/zmq_atomic_counter_dec/3.md) [**zmq\_atomic\_counter\_value**(3)](/zmq_atomic_counter_value/3.md) [**zmq\_atomic\_counter\_destroy**(3)](/zmq_atomic_counter_destroy/3.md)

## AUTHORS

This page was written by the 0MQ community. To make a change please read the 0MQ Contribution Policy at **http://www.zeromq.org/docs:contributing**.