// // Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2022 // // 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 #if TD_PORT_POSIX #include "td/utils/common.h" #include "td/utils/Time.h" #include #include #endif namespace td { #if TD_PORT_POSIX namespace detail { template auto skip_eintr(F &&f) { decltype(f()) res; static_assert(std::is_integral::value, "integral type expected"); do { errno = 0; // just in case res = f(); } while (res < 0 && errno == EINTR); return res; } template auto skip_eintr_cstr(F &&f) { char *res; do { errno = 0; // just in case res = f(); } while (res == nullptr && errno == EINTR); return res; } template auto skip_eintr_timeout(F &&f, int32 timeout_ms) { decltype(f(timeout_ms)) res; static_assert(std::is_integral::value, "integral type expected"); auto start = Timestamp::now(); auto left_timeout_ms = timeout_ms; while (true) { errno = 0; // just in case res = f(left_timeout_ms); if (res >= 0 || errno != EINTR) { break; } left_timeout_ms = static_cast(td::max((start.at() - Timestamp::now().at()) * 1000 + timeout_ms + 1 - 1e-9, 0.0)); } return res; } } // namespace detail #endif } // namespace td