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Light and self-contained implementation of C++17 parallel algorithms.

License: BSD 2-Clause "Simplified" License

CMake 8.75% C++ 89.44% Python 1.54% Shell 0.26%
concurrency cpp11 cpp14 cpp17 emscripten multithreading parallel parallel-computing parallel-sort parallel-sorting sorting sorting-algorithms sorting-algorithms-implemented stl stl-algorithms thread threading wasm

poolstl's Issues

Emscripten - Clang

Hi,
I have tested the replacement in my project and it works just fine on windows visual studio 2022 and android studio 2022.3.1 (ndk 26.1.109)

It works as expected, however with emscripten, the code below fails with the provided log.
version of poolSTL 0.3.4

I am not sure if you have tested it with emscripten, this stack trace is from google chrome. I'll keep looking in to it, I have provided the report in case you can provide more info.

#define POOLSTL_STD_SUPPLEMENT 1
#include <poolSTL/poolstl.hpp>
#include <vector>

int  main()
{
    // Create a vector of 10 numbers
    std::vector<int> numbers = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};

    // Sum the numbers in parallel using std::reduce with std::execution::par
    int sum = std::reduce(std::execution::par, numbers.begin(), numbers.end());

	return sum;
}

$std::__2::__throw_system_error(int, char const*) @ system_error.cpp:293
$std::__2::thread::thread<void (task_thread_pool::task_thread_pool::*)(), task_thread_pool::task_thread_pool*, void>(void (task_thread_pool::task_thread_pool::*&&)(), task_thread_pool::task_thread_pool*&&) @ thread.h:252
$void std::__2::allocator<std::__2::thread>::construct[abi:ue170004]<std::__2::thread, void (task_thread_pool::task_thread_pool::*)(), task_thread_pool::task_thread_pool*>(std::__2::thread*, void (task_thread_pool::task_thread_pool::*&&)(), task_thread_pool::task_thread_pool*&&) @ allocator.h:167
$void std::__2::allocator_traits<std::__2::allocator<std::__2::thread>>::construct[abi:ue170004]<std::__2::thread, void (task_thread_pool::task_thread_pool::*)(), task_thread_pool::task_thread_pool*, void>(std::__2::allocator<std::__2::thread>&, std::__2::thread*, void (task_thread_pool::task_thread_pool::*&&)(), task_thread_pool::task_thread_pool*&&) @ allocator_traits.h:296
$void std::__2::vector<std::__2::thread, std::__2::allocator<std::__2::thread>>::__emplace_back_slow_path<void (task_thread_pool::task_thread_pool::*)(), task_thread_pool::task_thread_pool*>(void (task_thread_pool::task_thread_pool::*&&)(), task_thread_pool::task_thread_pool*&&) @ vector:1660
$std::__2::thread& std::__2::vector<std::__2::thread, std::__2::allocator<std::__2::thread>>::emplace_back<void (task_thread_pool::task_thread_pool::*)(), task_thread_pool::task_thread_pool*>(void (task_thread_pool::task_thread_pool::*&&)(), task_thread_pool::task_thread_pool*&&) @ vector:1681
$task_thread_pool::task_thread_pool::start_threads(unsigned int) @ poolstl.hpp:407
$task_thread_pool::task_thread_pool::task_thread_pool(unsigned int) @ poolstl.hpp:157
$std::__2::__shared_ptr_emplace<task_thread_pool::task_thread_pool, std::__2::allocator<task_thread_pool::task_thread_pool>>::__shared_ptr_emplace[abi:ue170004]<>(std::__2::allocator<task_thread_pool::task_thread_pool>) @ shared_ptr.h:302
$std::__2::shared_ptr<task_thread_pool::task_thread_pool> std::__2::allocate_shared[abi:ue170004]<task_thread_pool::task_thread_pool, std::__2::allocator<task_thread_pool::task_thread_pool>, void>(std::__2::allocator<task_thread_pool::task_thread_pool> const&) @ shared_ptr.h:1022
$std::__2::shared_ptr<task_thread_pool::task_thread_pool> std::__2::make_shared[abi:ue170004]<task_thread_pool::task_thread_pool, void>() @ shared_ptr.h:1031
$poolstl::execution::internal::get_default_pool()::'lambda'()::operator()() const @ poolstl.hpp:686
$decltype(std::declval<poolstl::execution::internal::get_default_pool()::'lambda'()>()()) std::__2::__invoke[abi:ue170004]<poolstl::execution::internal::get_default_pool()::'lambda'()>(poolstl::execution::internal::get_default_pool()::'lambda'()&&) @ invoke.h:340
$void std::__2::__call_once_param<std::__2::tuple<poolstl::execution::internal::get_default_pool()::'lambda'()&&>>::__execute[abi:ue170004]<>(std::__2::__tuple_indices<...>) @ mutex:632
$std::__2::__call_once_param<std::__2::tuple<poolstl::execution::internal::get_default_pool()::'lambda'()&&>>::operator()[abi:ue170004]() @ mutex:624
$void std::__2::__call_once_proxy[abi:ue170004]<std::__2::tuple<poolstl::execution::internal::get_default_pool()::'lambda'()&&>>(void*) @ mutex:660
$std::__2::__call_once(unsigned long volatile&, void*, void (*)(void*)) @ mutex.cpp:238
$void std::__2::call_once[abi:ue170004]<poolstl::execution::internal::get_default_pool()::'lambda'()>(std::__2::once_flag&, poolstl::execution::internal::get_default_pool()::'lambda'()&&) @ mutex:677
$poolstl::execution::internal::get_default_pool() @ poolstl.hpp:686
$poolstl::execution::parallel_policy::pool() const @ poolstl.hpp:730
$std::__2::vector<std::__2::future<int>, std::__2::allocator<std::__2::future<int>>> poolstl::internal::parallel_chunk_for_1<poolstl::execution::parallel_policy const&, std::__2::__wrap_iter<int*>, int (*)(std::__2::__wrap_iter<int*>, std::__2::__wrap_iter<int*>, int, std::__2::plus<int>), int, int&, std::__2::plus<int>&>(poolstl::execution::parallel_policy const&, std::__2::__wrap_iter<int*>, std::__2::__wrap_iter<int*>, int (*)(std::__2::__wrap_iter<int*>, std::__2::__wrap_iter<int*>, int, std::__2::plus<int>), int*, int, int&, std::__2::plus<int>&) @ poolstl.hpp:1698
$std::__2::enable_if<std::is_base_of<poolstl::execution::poolstl_policy, std::__2::remove_cv<std::__2::remove_reference<poolstl::execution::parallel_policy const&>::type>::type>::value, int>::type std::reduce<poolstl::execution::parallel_policy const&, std::__2::__wrap_iter<int*>, int, std::__2::plus<int>>(poolstl::execution::parallel_policy const&, std::__2::__wrap_iter<int*>, std::__2::__wrap_iter<int*>, int, std::__2::plus<int>) @ poolstl.hpp:2578
$std::__2::enable_if<std::is_base_of<poolstl::execution::poolstl_policy, std::__2::remove_cv<std::__2::remove_reference<poolstl::execution::parallel_policy const&>::type>::type>::value, int>::type std::reduce<poolstl::execution::parallel_policy const&, std::__2::__wrap_iter<int*>, int>(poolstl::execution::parallel_policy const&, std::__2::__wrap_iter<int*>, std::__2::__wrap_iter<int*>, int) @ poolstl.hpp:2594
$std::__2::enable_if<std::is_base_of<poolstl::execution::poolstl_policy, std::__2::remove_cv<std::__2::remove_reference<poolstl::execution::parallel_policy const&>::type>::type>::value, std::__2::iterator_traits<std::__2::__wrap_iter<int*>>::value_type>::type std::reduce<poolstl::execution::parallel_policy const&, std::__2::__wrap_iter<int*>>(poolstl::execution::parallel_policy const&, std::__2::__wrap_iter<int*>, std::__2::__wrap_iter<int*>) @ poolstl.hpp:2605
$ToolKit::Game::Frame(float) @ Game.cpp:36

Add a policy that selects between parallel and sequential

Some codes are run on both small and large inputs. The small inputs may be best handled sequentially. Add a policy that allows selecting between sequential and parallel.

This mechanism should work both with poolstl::par/poolstl::seq and std::execution::par/std::execution::seq.

Add a std supplement mode

Add a single-line way to define std::execution::par if the compiler does not support it.

This way user code can be written such that the native compiler-provided methods are used if available else poolSTL fallback.

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