libdispatch_executor_group.hpp

/*
    Copyright 2026 Adobe
    Distributed under the Boost Software License, Version 1.0.
    (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
*/
 
/**************************************************************************************************/
 
#ifndef STLAB_CONCURRENCY_DETAIL_LIBDISPATCH_EXECUTOR_GROUP_HPP
#define STLAB_CONCURRENCY_DETAIL_LIBDISPATCH_EXECUTOR_GROUP_HPP
 
#include <stlab/execution/config.hpp>
 
#include <dispatch/dispatch.h>
 
#include <utility>
 
namespace stlab {
STLAB_EXECUTION_VERSION_NAMESPACE_BEGIN()
namespace execution_detail {

struct group_t {
    dispatch_group_t _group = dispatch_group_create();

    group_t() = default;

    group_t(const group_t&) = delete;

    group_t(group_t&& a) noexcept : _group(std::exchange(a._group, nullptr)) {}

    auto operator=(const group_t&) -> group_t& = delete;

    auto operator=(group_t&& a) noexcept -> group_t& {
        group_t previous(std::move(a));
        std::swap(_group, previous._group);
        return *this;
    }

    ~group_t();
};

auto group() -> const group_t&;
 
} // namespace execution_detail
STLAB_EXECUTION_VERSION_NAMESPACE_END()
} // namespace stlab
 
/**************************************************************************************************/
 
#endif
 
/**************************************************************************************************/