---
name: "pthread_testcancel"
section: "3"
platform: "linux"
package: "man-pages"
version: "6.19-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux", "freebsd"]
url: "https://new.carta.tech/pthread_testcancel"
---

# pthread\_testcancel(3)

request delivery of any pending cancelation request

## NAME

pthread\_testcancel - request delivery of any pending cancelation request

## LIBRARY

POSIX threads library (*libpthread*, *-lpthread*)

## SYNOPSIS

```
#include <pthread.h>
```

**void pthread\_testcancel(void);**

## DESCRIPTION

Calling **pthread\_testcancel**() creates a cancelation point within the calling thread, so that a thread that is otherwise executing code that contains no cancelation points will respond to a cancelation request.

If cancelability is disabled (using [**pthread\_setcancelstate**(3)](/pthread_setcancelstate/3.md)), or no cancelation request is pending, then a call to **pthread\_testcancel**() has no effect.

## RETURN VALUE

This function does not return a value. If the calling thread is canceled as a consequence of a call to this function, then the function does not return.

## ERRORS

This function always succeeds.

## ATTRIBUTES

For an explanation of the terms used in this section, see [**attributes**(7)](/attributes/7.md).

| | | |
| --- | --- | --- |
| **Interface** | **Attribute** | **Value** |
| **pthread\_testcancel**() | Thread safety | MT-Safe |

## STANDARDS

POSIX.1-2008.

## HISTORY

glibc 2.0. POSIX.1-2001.

## EXAMPLES

See [**pthread\_cleanup\_push**(3)](/pthread_cleanup_push/3.md).

## SEE ALSO

[**pthread\_cancel**(3)](/pthread_cancel/3.md), [**pthread\_cleanup\_push**(3)](/pthread_cleanup_push/3.md), [**pthread\_setcancelstate**(3)](/pthread_setcancelstate/3.md), [**pthreads**(7)](/pthreads/7.md)