yohhoy’s gists

yohhoy / p2300-words.md

Last active September 24, 2025 01:05

C++26 std::execution paper size

Paper	Title	Words
P2300R10	std::execution	47495
P3325R5	A Utility for Creating Execution Environments	2168
P3396R1	std::execution wording fixes	3061
P2079R10	Parallel scheduler	9383
P3149R11	async_scope - Creating scopes for non-sequential concurrency	16255
P3284R4	write_env and unstoppable Sender Adaptors	1346
P3433R1	Allocator Support for Operation States	827

yohhoy / cancellable-sender.cpp

Last active September 24, 2025 07:59

Cancellable sender in C++26 S/R library

	#include <cassert>
	#include <stop_token>
	#include <utility>
	#include <print>
	// https://github.com/NVIDIA/stdexec/
	#include <stdexec/execution.hpp>
	namespace exec = stdexec;
	namespace std {
	using exec::get_stop_token, exec::sync_wait;
	using exec::inplace_stop_source, exec::stoppable_token;

yohhoy / awaitable-coroutine.cpp

Last active June 13, 2025 09:02

C++26 Sender/Receiver and awaitable Coroutine

	#include <coroutine>
	#include <print>
	// https://github.com/NVIDIA/stdexec/
	#include <stdexec/execution.hpp>
	namespace ex = stdexec;


	template<typename T>
	class Lazy {
	public:

yohhoy / submdspan-test.cpp

Created January 31, 2024 14:19

submdspan

	#include <cassert>
	#include <concepts>
	#include <span>
	#include <tuple>
	#include <utility>
	#include <ranges>
	#if 1
	#include <https://raw.githubusercontent.com/kokkos/mdspan/single-header/mdspan.hpp>
	#else
	#include <mdspan>

yohhoy / mdspan_hilbert.cpp

Last active November 25, 2023 17:07

Hilbert curve layout for std::mdspan

	#include <cassert>
	#include <bit>
	#include <iostream>
	#include <utility>
	#if 1
	#include <https://raw.githubusercontent.com/kokkos/mdspan/single-header/mdspan.hpp>
	using std::experimental::mdspan;
	using std::experimental::dextents;
	#else
	#include <mdspan>

yohhoy / mdspan-test.cpp

Last active May 2, 2024 07:22

mdspan constructors & deduction guides

	#include <cassert>
	#include <array>
	#include <span>
	#include <type_traits>
	#if 0
	#include <mdspan>
	#else
	#include <https://raw.githubusercontent.com/kokkos/mdspan/single-header/mdspan.hpp>
	#endif
	using namespace std;

yohhoy / mm.c

Last active September 22, 2022 04:44

	// https://groups.google.com/g/golang-nuts/c/Gze1TRtdLdc/m/RoD2AxssDgAJ
	// http://svr-pes20-cppmem.cl.cam.ac.uk/cppmem/
	int main() {
	int x = 0;
	atomic_int int y = 0;
	{{{ { x = 1;
	y.store(1);
	x = 1;
	y.store(1); }
	\|\|\| { y.load().readsvalue(0);

yohhoy / barrier.md

Created August 29, 2022 07:13

Full barrier

P: =p0=\ /----\ /=p1=\ /----\ /=
        *      *      *      *
C: ----/ \=c0=/ \----/ \=c1=/ \-

Half barrier

P: p0=\--------/=p1=\--------/=

yohhoy / chrono_io.hpp

Last active December 15, 2021 04:38

Ad-hoc std::ostream support for <chrono>

	#include <ctime>
	#include <chrono>
	#include <iostream>
	#include <iomanip>

	namespace std {

	// https://timsong-cpp.github.io/cppwp/n4868/time.cal.ymd.nonmembers#14
	// "yyyy-mm-dd"
	inline ostream& operator<<(ostream& os, const chrono::year_month_day& ymd) {

yohhoy / endian.hpp

Last active October 28, 2021 10:16

endian conversion

	// requires C++23 or later
	#include <bit>
	#include <concepts>

	template <std::integral T>
	constexpr T hton(T value) noexcept
	{
	if constexpr (std::endian::native == std::endian::little) {
	return std::byteswap(value);
	} else {

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