1 //===------------- Windows implementation of IO utils -----------*- C++ -*-===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #include "io.h" 10 #include "src/__support/macros/config.h" 11 12 // On Windows we cannot make direct syscalls since Microsoft changes system call 13 // IDs periodically. We must rely on functions exported from ntdll.dll or 14 // kernel32.dll to invoke system service procedures. 15 #define WIN32_LEAN_AND_MEAN 16 #include <Windows.h> 17 18 namespace LIBC_NAMESPACE_DECL { 19 write_to_stderr(cpp::string_view msg)20void write_to_stderr(cpp::string_view msg) { 21 ::HANDLE stream = ::GetStdHandle(STD_ERROR_HANDLE); 22 ::WriteFile(stream, msg.data(), msg.size(), nullptr, nullptr); 23 } 24 25 } // namespace LIBC_NAMESPACE_DECL 26