qt-everywhere-src-5.14.1/qtlocation/src/3rdparty/mapbox-gl-native/include/mbgl/util/util.hpp

#pragma once

#ifndef NDEBUG

#include <thread>
#define MBGL_STORE_THREAD(tid) const std::thread::id tid = std::this_thread::get_id();
#define MBGL_VERIFY_THREAD(tid) assert(tid == std::this_thread::get_id());

#else

#define MBGL_STORE_THREAD(tid)
#define MBGL_VERIFY_THREAD(tid)

#endif

// GCC 4.9 compatibility
#if !defined(__GNUC__) || __GNUC__ >= 5
#define MBGL_CONSTEXPR constexpr
#else
#define MBGL_CONSTEXPR inline
#endif