pow-testgiver support

tdutils/td/utils/port/detail/skip_eintr.h

@@ -0,0 +1,52 @@
+/*
+    This file is part of TON Blockchain Library.
+
+    TON Blockchain Library is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Lesser General Public License as published by
+    the Free Software Foundation, either version 2 of the License, or
+    (at your option) any later version.
+
+    TON Blockchain Library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public License
+    along with TON Blockchain Library.  If not, see <http://www.gnu.org/licenses/>.
+
+    Copyright 2017-2020 Telegram Systems LLP
+*/
+
+#pragma once
+
+#include <cerrno>
+#include <type_traits>
+
+namespace td {
+
+#if TD_PORT_POSIX
+namespace detail {
+template <class F>
+auto skip_eintr(F &&f) {
+  decltype(f()) res;
+  static_assert(std::is_integral<decltype(res)>::value, "integral type expected");
+  do {
+    errno = 0;  // just in case
+    res = f();
+  } while (res < 0 && errno == EINTR);
+  return res;
+}
+
+template <class F>
+auto skip_eintr_cstr(F &&f) {
+  char *res;
+  do {
+    errno = 0;  // just in case
+    res = f();
+  } while (res == nullptr && errno == EINTR);
+  return res;
+}
+}  // namespace detail
+#endif
+
+}  // namespace td