__gnu_para...rallel_tag(3)

📦
version 16.2.1+r23+gd564253eb6c8 · 7 versions
, in arch rolling, centos-stream 10, fedora 43, fedora 44

💖 NAME 💖

__gnu_parallel::parallel_tag — the little tag that says "bestie, run this in parallel" at compile time, and can also hold onto a thread count you picked yourself. Periodt. 💅

So like… this is from the Library Functions Manual for libstdc++, and it's one of those internal-ish C++ tag types that whisper to the compiler "go parallel pls". 🧚

✨ SYNOPSIS ✨

#include <tags.h>

Inherited by all these iconic little tag babies 👑:

  • __gnu_parallel::balanced_quicksort_tag
  • __gnu_parallel::balanced_tag
  • __gnu_parallel::default_parallel_tag
  • __gnu_parallel::exact_tag
  • __gnu_parallel::multiway_mergesort_exact_tag
  • __gnu_parallel::multiway_mergesort_sampling_tag
  • __gnu_parallel::multiway_mergesort_tag
  • __gnu_parallel::omp_loop_static_tag
  • __gnu_parallel::omp_loop_tag
  • __gnu_parallel::quicksort_tag
  • __gnu_parallel::sampling_tag
  • __gnu_parallel::unbalanced_tag

🌸 Public Member Functions 🌸

  • parallel_tag () — default constructor, uses the default number of threads. no thoughts, just vibes.
  • parallel_tag (_ThreadIndex __num_threads) — constructor that recommends a thread count for you to use. main character energy, you decide.
  • _ThreadIndex __get_num_threads () — find out the desired number of threads. the gossip. 👀
  • void set_num_threads (_ThreadIndex __num_threads) — set the desired number of threads. your call, bestie.

🦋 Detailed Description 🦋

Recommends parallel execution at compile time, optionally using a user-specified number of threads.

That's literally it. That's the whole job. It's giving "I'm just a tag but I'm changing lives". 💜

🎀 Constructor & Destructor Documentation 🎀

__gnu_parallel::parallel_tag::parallel_tag () [inline]

Default constructor. Use default number of threads.

__gnu_parallel::parallel_tag::parallel_tag (_ThreadIndex __num_threads) [inline]

Default constructor. Recommend number of threads to use.

Parameters

  • __num_threads — Desired number of threads.

⭐ Member Function Documentation ⭐

_ThreadIndex __gnu_parallel::parallel_tag::__get_num_threads () [inline]

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().

Not a typo, not a glitch, not me being lazy — the original really does list __gnu_parallel::__parallel_sort() seven separate times. Seven. Slay. 🔥

void __gnu_parallel::parallel_tag::set_num_threads (_ThreadIndex __num_threads) [inline]

Set the desired number of threads.

Parameters

  • __num_threads — Desired number of threads.

🫶 Author 🫶

Generated automatically by Doxygen for libstdc++ from the source code. not a human, just a robot doing its thing 🤖✨

heads up bestie: this whole page lives in the libstdc++ manual, and it's filed under section 3 (__gnu_para...rallel_tag(3) — yes the name is truncated like that, that's just how it is, no cap). 💖

okay that's the whole page, mwah, go forth and parallelize responsibly 🎀🌈

📦 where this page comes from
  • arch rolling: gcc 16.2.1+r23+gd564253eb6c8-1 · GPL-3.0-or-later WITH GCC-exception-3.1 AND GFDL-1.3-or-later
  • centos-stream 10: gcc-toolset-15-libstdc++-docs 15.2.1-8.1.el10 · GPL-3.0-or-later AND LGPL-3.0-or-later AND (GPL-3.0-or-later WITH GCC-exception-3.1) AND (GPL-3.0-or-later WITH Texinfo-exception) AND (LGPL-2.1-or-later WITH GCC-exception-2.0) AND (GPL-2.0-or-later WITH GCC-exception-2.0) AND (GPL-2.0-or-later WITH GNU-compiler-exception) AND BSL-1.0 AND GFDL-1.3-or-later AND Linux-man-pages-copyleft-2-para AND SunPro AND BSD-1-Clause AND BSD-2-Clause AND BSD-2-Clause-Views AND BSD-3-Clause AND BSD-4-Clause AND BSD-Source-Code AND Zlib AND MIT AND Apache-2.0 AND (Apache-2.0 WITH LLVM-Exception) AND ZPL-2.1 AND ISC AND LicenseRef-Fedora-Public-Domain AND HP-1986 AND curl AND Martin-Birgmeier AND HPND-Markus-Kuhn AND dtoa AND SMLNJ AND AMD-newlib AND OAR AND HPND-merchantability-variant AND HPND-Intel
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  • centos-stream 10: libstdc++-docs 14.4.1-4.el10 · GPL-3.0-or-later AND LGPL-3.0-or-later AND (GPL-3.0-or-later WITH GCC-exception-3.1) AND (GPL-3.0-or-later WITH Texinfo-exception) AND (LGPL-2.1-or-later WITH GCC-exception-2.0) AND (GPL-2.0-or-later WITH GCC-exception-2.0) AND (GPL-2.0-or-later WITH GNU-compiler-exception) AND BSL-1.0 AND GFDL-1.3-or-later AND Linux-man-pages-copyleft-2-para AND SunPro AND BSD-1-Clause AND BSD-2-Clause AND BSD-2-Clause-Views AND BSD-3-Clause AND BSD-4-Clause AND BSD-Source-Code AND Zlib AND MIT AND Apache-2.0 AND (Apache-2.0 WITH LLVM-Exception) AND ZPL-2.1 AND ISC AND LicenseRef-Fedora-Public-Domain AND HP-1986 AND curl AND Martin-Birgmeier AND HPND-Markus-Kuhn AND dtoa AND SMLNJ AND AMD-newlib AND OAR AND HPND-merchantability-variant AND HPND-Intel
  • fedora 43: libstdc++-docs 15.2.1-2.fc43 · GPL-3.0-or-later AND LGPL-3.0-or-later AND (GPL-3.0-or-later WITH GCC-exception-3.1) AND (GPL-3.0-or-later WITH Texinfo-exception) AND (LGPL-2.1-or-later WITH GCC-exception-2.0) AND (GPL-2.0-or-later WITH GCC-exception-2.0) AND (GPL-2.0-or-later WITH GNU-compiler-exception) AND BSL-1.0 AND GFDL-1.3-or-later AND Linux-man-pages-copyleft-2-para AND SunPro AND BSD-1-Clause AND BSD-2-Clause AND BSD-2-Clause-Views AND BSD-3-Clause AND BSD-4-Clause AND BSD-Source-Code AND Zlib AND MIT AND Apache-2.0 AND (Apache-2.0 WITH LLVM-Exception) AND ZPL-2.1 AND ISC AND LicenseRef-Fedora-Public-Domain AND HP-1986 AND curl AND Martin-Birgmeier AND HPND-Markus-Kuhn AND dtoa AND SMLNJ AND AMD-newlib AND OAR AND HPND-merchantability-variant AND HPND-Intel
  • fedora 43: libstdc++-docs 15.3.1-1.fc43 · GPL-3.0-or-later AND LGPL-3.0-or-later AND (GPL-3.0-or-later WITH GCC-exception-3.1) AND (GPL-3.0-or-later WITH Texinfo-exception) AND (LGPL-2.1-or-later WITH GCC-exception-2.0) AND (GPL-2.0-or-later WITH GCC-exception-2.0) AND (GPL-2.0-or-later WITH GNU-compiler-exception) AND BSL-1.0 AND GFDL-1.3-or-later AND Linux-man-pages-copyleft-2-para AND SunPro AND BSD-1-Clause AND BSD-2-Clause AND BSD-2-Clause-Views AND BSD-3-Clause AND BSD-4-Clause AND BSD-Source-Code AND Zlib AND MIT AND Apache-2.0 AND (Apache-2.0 WITH LLVM-Exception) AND ZPL-2.1 AND ISC AND LicenseRef-Fedora-Public-Domain AND HP-1986 AND curl AND Martin-Birgmeier AND HPND-Markus-Kuhn AND dtoa AND SMLNJ AND AMD-newlib AND OAR AND HPND-merchantability-variant AND HPND-Intel
  • fedora 44: libstdc++-docs 16.0.1-0.10.fc44 · GPL-3.0-or-later AND LGPL-3.0-or-later AND (GPL-3.0-or-later WITH GCC-exception-3.1) AND (GPL-3.0-or-later WITH Texinfo-exception) AND (LGPL-2.1-or-later WITH GCC-exception-2.0) AND (GPL-2.0-or-later WITH GCC-exception-2.0) AND (GPL-2.0-or-later WITH GNU-compiler-exception) AND BSL-1.0 AND GFDL-1.3-or-later AND Linux-man-pages-copyleft-2-para AND SunPro AND BSD-1-Clause AND BSD-2-Clause AND BSD-2-Clause-Views AND BSD-3-Clause AND BSD-4-Clause AND BSD-Source-Code AND Zlib AND MIT AND Apache-2.0 AND (Apache-2.0 WITH LLVM-Exception) AND ZPL-2.1 AND ISC AND LicenseRef-Fedora-Public-Domain AND HP-1986 AND curl AND Martin-Birgmeier AND HPND-Markus-Kuhn AND dtoa AND SMLNJ AND AMD-newlib AND OAR AND HPND-merchantability-variant AND HPND-Intel
  • fedora 44: libstdc++-docs 16.2.1-2.fc44
  • fedora 44: libstdc++-docs 16.2.1-3.fc44 · GPL-3.0-or-later AND LGPL-3.0-or-later AND (GPL-3.0-or-later WITH GCC-exception-3.1) AND (GPL-3.0-or-later WITH Texinfo-exception) AND (LGPL-2.1-or-later WITH GCC-exception-2.0) AND (GPL-2.0-or-later WITH GCC-exception-2.0) AND (GPL-2.0-or-later WITH GNU-compiler-exception) AND BSL-1.0 AND GFDL-1.3-or-later AND Linux-man-pages-copyleft-2-para AND SunPro AND BSD-1-Clause AND BSD-2-Clause AND BSD-2-Clause-Views AND BSD-3-Clause AND BSD-4-Clause AND BSD-Source-Code AND Zlib AND MIT AND Apache-2.0 AND (Apache-2.0 WITH LLVM-Exception) AND ZPL-2.1 AND ISC AND LicenseRef-Fedora-Public-Domain AND HP-1986 AND curl AND Martin-Birgmeier AND HPND-Markus-Kuhn AND dtoa AND SMLNJ AND AMD-newlib AND OAR AND HPND-merchantability-variant AND HPND-Intel
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