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//
// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2026
//
// 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)
//
#pragma once
#include "td/utils/port/config.h"
#include "td/utils/common.h"
#include "td/utils/Destructor.h"
#include <memory>
#include <utility>
namespace td {
// clang-format off
#if TD_GCC || TD_CLANG
#define TD_THREAD_LOCAL __thread
#elif TD_INTEL || TD_MSVC
#define TD_THREAD_LOCAL thread_local
#else
#warning "TD_THREAD_LOCAL is not defined, trying 'thread_local'"
#define TD_THREAD_LOCAL thread_local
#endif
// clang-format on
// If raw_ptr is not nullptr, allocate T as in std::make_unique<T>(args...) and store pointer into raw_ptr
template <class T, class P, class... ArgsT>
bool init_thread_local(P &raw_ptr, ArgsT &&...args);
// Destroy all thread locals, and store nullptr into corresponding pointers
void clear_thread_locals();
void set_thread_id(int32 id);
int32 get_thread_id();
namespace detail {
void add_thread_local_destructor(unique_ptr<Destructor> destructor);
template <class T, class P, class... ArgsT>
void do_init_thread_local(P &raw_ptr, ArgsT &&...args) {
auto ptr = std::make_unique<T>(std::forward<ArgsT>(args)...);
raw_ptr = ptr.get();
detail::add_thread_local_destructor(create_destructor([ptr = std::move(ptr), &raw_ptr]() mutable {
ptr.reset();
raw_ptr = nullptr;
}));
}
} // namespace detail
template <class T, class P, class... ArgsT>
bool init_thread_local(P &raw_ptr, ArgsT &&...args) {
if (likely(raw_ptr != nullptr)) {
return false;
}
detail::do_init_thread_local<T>(raw_ptr, std::forward<ArgsT>(args)...);
return true;
}
} // namespace td
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