1*ded08015SSirui Mu //===------------- Windows implementation of IO utils -----------*- C++ -*-===// 2*ded08015SSirui Mu // 3*ded08015SSirui Mu // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4*ded08015SSirui Mu // See https://llvm.org/LICENSE.txt for license information. 5*ded08015SSirui Mu // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6*ded08015SSirui Mu // 7*ded08015SSirui Mu //===----------------------------------------------------------------------===// 8*ded08015SSirui Mu 9*ded08015SSirui Mu #include "io.h" 10*ded08015SSirui Mu #include "src/__support/macros/config.h" 11*ded08015SSirui Mu 12*ded08015SSirui Mu // On Windows we cannot make direct syscalls since Microsoft changes system call 13*ded08015SSirui Mu // IDs periodically. We must rely on functions exported from ntdll.dll or 14*ded08015SSirui Mu // kernel32.dll to invoke system service procedures. 15*ded08015SSirui Mu #define WIN32_LEAN_AND_MEAN 16*ded08015SSirui Mu #include <Windows.h> 17*ded08015SSirui Mu 18*ded08015SSirui Mu namespace LIBC_NAMESPACE_DECL { 19*ded08015SSirui Mu 20*ded08015SSirui Mu void write_to_stderr(cpp::string_view msg) { 21*ded08015SSirui Mu ::HANDLE stream = ::GetStdHandle(STD_ERROR_HANDLE); 22*ded08015SSirui Mu ::WriteFile(stream, msg.data(), msg.size(), nullptr, nullptr); 23*ded08015SSirui Mu } 24*ded08015SSirui Mu 25*ded08015SSirui Mu } // namespace LIBC_NAMESPACE_DECL 26