---
name: "ck_pr_stall"
section: "3"
platform: "linux"
package: "libck-dev"
version: "0.7.2-6"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/ck_pr_stall"
---

# ck\_pr\_stall(3)

busy-wait primitive

## NAME

**ck\_pr\_stall** – busy-wait primitive

## LIBRARY

Concurrency Kit (libck, -lck)

## SYNOPSIS

**#include \<ck\_pr.h\>**

*void*\

**ck\_pr\_stall**(*void*);

## DESCRIPTION

The **ck\_pr\_stall**(*3*) function should be used inside retry paths of busy-wait loops. It not only serves as a compiler barrier, but on some architectures it emits cycle-saving instructions.

## EXAMPLE

```
#include <ck_pr.h>
static int ready = 0;
void
function(void)
{
	/* Busy-wait until ready is non-zero. */
	while (ck_pr_load_int(&ready) == 0)
		ck_pr_stall();
	return;
}
```

## SEE ALSO

[ck\_pr\_fence\_load(3)](/ck_pr_fence_load/3.md), [ck\_pr\_fence\_load\_depends(3)](/ck_pr_fence_load_depends/3.md), [ck\_pr\_fence\_store(3)](/ck_pr_fence_store/3.md), [ck\_pr\_fence\_memory(3)](/ck_pr_fence_memory/3.md), [ck\_pr\_barrier(3)](/ck_pr_barrier/3.md), [ck\_pr\_fas(3)](/ck_pr_fas/3.md), [ck\_pr\_load(3)](/ck_pr_load/3.md), [ck\_pr\_store(3)](/ck_pr_store/3.md), [ck\_pr\_faa(3)](/ck_pr_faa/3.md), [ck\_pr\_inc(3)](/ck_pr_inc/3.md), [ck\_pr\_dec(3)](/ck_pr_dec/3.md), [ck\_pr\_neg(3)](/ck_pr_neg/3.md), [ck\_pr\_not(3)](/ck_pr_not/3.md), [ck\_pr\_add(3)](/ck_pr_add/3.md), [ck\_pr\_sub(3)](/ck_pr_sub/3.md), [ck\_pr\_and(3)](/ck_pr_and/3.md), [ck\_pr\_or(3)](/ck_pr_or/3.md), [ck\_pr\_xor(3)](/ck_pr_xor/3.md), [ck\_pr\_cas(3)](/ck_pr_cas/3.md), [ck\_pr\_btc(3)](/ck_pr_btc/3.md), [ck\_pr\_bts(3)](/ck_pr_bts/3.md), [ck\_pr\_btr(3)](/ck_pr_btr/3.md)

Additional information available at http://concurrencykit.org/