main_executor.hpp

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/*
    Copyright 2015 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_MAIN_EXECUTOR_HPP
#define STLAB_CONCURRENCY_MAIN_EXECUTOR_HPP

 
#include <stlab/execution/config.hpp>
 
#if !STLAB_MAIN_EXECUTOR(NONE)
#include <stlab/concurrency/default_executor.hpp>
#include <stlab/concurrency/task.hpp>
 
#include <type_traits>
#include <utility>
#endif
 
/**************************************************************************************************/
 
#if !STLAB_MAIN_EXECUTOR(NONE)
 
namespace stlab {
inline namespace v2 {


extern "C" void stlab_v2_main_executor_submit(const unsigned char* task_abi_guard,
                                              const stlab_v2_task_concept* vtable,
                                              stlab_v2_task_proc invoke,
                                              void* source) noexcept;

extern "C" [[noreturn]] void stlab_v2_main_executor_run();

 
} // namespace v2
} // namespace stlab
 
#endif
 
namespace stlab {
STLAB_EXECUTION_VERSION_NAMESPACE_BEGIN()
 

 
/**************************************************************************************************/
 
namespace execution_detail {
 
/**************************************************************************************************/
 
#if !STLAB_MAIN_EXECUTOR(NONE)

struct main_executor_type {
    using result_type = void;

    template <class F>
    auto operator()(F&& f) const -> std::enable_if_t<std::is_nothrow_invocable_v<std::decay_t<F>>> {
        task<void() noexcept> t{std::forward<F>(f)};
        stlab_v2_main_executor_submit(&current_task_storage_abi_guard::value,
                                      t.relocation_concept(), t.relocation_invoke(),
                                      t.relocation_source());
    }
};
 
/**************************************************************************************************/
 
#endif
 
} // namespace execution_detail
 
#if !STLAB_MAIN_EXECUTOR(NONE)

inline constexpr auto main_executor = execution_detail::main_executor_type{};

[[noreturn]] inline void main_executor_run() { stlab_v2_main_executor_run(); }
#endif
 
/**************************************************************************************************/

 
STLAB_EXECUTION_VERSION_NAMESPACE_END()
} // namespace stlab
 
/**************************************************************************************************/
 
#endif // STLAB_CONCURRENCY_MAIN_EXECUTOR_HPP