thread.hpp

// Copyright Take Vos 2019-2020.
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at https://www.boost.org/LICENSE_1_0.txt)
 
#pragma once
 
#include "required.hpp"
#include "os_detect.hpp"
#include "hires_utc_clock.hpp"
#if TT_OPERATING_SYSTEM == TT_OS_WINDOWS
#include <intrin.h>
#endif
#include <thread>
#include <string_view>
#include <functional>
#include <atomic>
#include <chrono>
 
namespace tt {
 
void set_thread_name(std::string_view name);
 
bool is_main_thread();
 
void run_from_main_loop(std::function<void()> f);
 
#if TT_OPERATING_SYSTEM == TT_OS_WINDOWS
using thread_id = uint32_t;
#else
using thread_id = uint64_t;
inline thread_local thread_id current_thread_id_dummy = 0;
#endif
 
 
 
[[nodiscard]] inline thread_id current_thread_id() noexcept
{
#if TT_OPERATING_SYSTEM == TT_OS_WINDOWS
    // Thread IDs on Win32 are guaranteed to be not zero.
    constexpr uint64_t NT_TIB_CurrentThreadID = 0x48;
    return __readgsdword(NT_TIB_CurrentThreadID);
#else
    // Addresses can not be zero.
    return reinterpret_cast<uint64_t>(&current_thread_id_dummy);
#endif
}
 
}