---
name: "__gnu_parallel::default_parallel_tag"
section: "3"
platform: "linux"
package: "gcc"
version: "16.2.1+r23+gd564253eb6c8-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/__gnu_parallel::default_parallel_tag"
---

# \_\_gnu\_parallel::default\_parallel\_tag(3)

Recommends parallel execution using the default parallel algorithm.

## NAME

\_\_gnu\_parallel::default\_parallel\_tag - Recommends parallel execution using the default parallel algorithm.

## SYNOPSIS

\#include \<tags.h\>

Inherits **\_\_gnu\_parallel::parallel\_tag**.

### Public Member Functions

**default\_parallel\_tag** (**\_ThreadIndex** \_\_num\_threads)\
 **\_ThreadIndex** **\_\_get\_num\_threads** ()\
 Find out desired number of threads.  void **set\_num\_threads** (**\_ThreadIndex** \_\_num\_threads)\
 Set the desired number of threads.

## Detailed Description

Recommends parallel execution using the default parallel algorithm.

## Member Function Documentation

### \_ThreadIndex \_\_gnu\_parallel::parallel\_tag::\_\_get\_num\_threads () \[inline\], \[inherited\]

Find out desired number of threads.

**Returns**

Desired number of threads.

Referenced by **\_\_gnu\_parallel::\_\_parallel\_sort()**, **\_\_gnu\_parallel::\_\_parallel\_sort()**, **\_\_gnu\_parallel::\_\_parallel\_sort()**, **\_\_gnu\_parallel::\_\_parallel\_sort()**, **\_\_gnu\_parallel::\_\_parallel\_sort()**, **\_\_gnu\_parallel::\_\_parallel\_sort()**, and **\_\_gnu\_parallel::\_\_parallel\_sort()**.

### void \_\_gnu\_parallel::parallel\_tag::set\_num\_threads (\_ThreadIndex \_\_num\_threads) \[inline\], \[inherited\]

Set the desired number of threads.

**Parameters**

*\_\_num\_threads* Desired number of threads.

## Author

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