1 //===- WindowsSupport.h - Common Windows Include File -----------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file defines things specific to Windows implementations. In addition to
11 // providing some helpers for working with win32 APIs, this header wraps
12 // <windows.h> with some portability macros. Always include WindowsSupport.h
13 // instead of including <windows.h> directly.
15 //===----------------------------------------------------------------------===//
17 //===----------------------------------------------------------------------===//
18 //=== WARNING: Implementation here must contain only generic Win32 code that
19 //=== is guaranteed to work on *all* Win32 variants.
20 //===----------------------------------------------------------------------===//
22 #ifndef LLVM_SUPPORT_WINDOWSSUPPORT_H
23 #define LLVM_SUPPORT_WINDOWSSUPPORT_H
25 // mingw-w64 tends to define it as 0x0502 in its headers.
29 // Require at least Windows XP(5.1) API.
30 #define _WIN32_WINNT 0x0501
31 #define _WIN32_IE 0x0600 // MinGW at it again.
32 #define WIN32_LEAN_AND_MEAN
34 #include "llvm/ADT/SmallVector.h"
35 #include "llvm/ADT/StringRef.h"
36 #include "llvm/ADT/Twine.h"
37 #include "llvm/Config/config.h" // Get build system configuration settings
38 #include "llvm/Support/Compiler.h"
39 #include <system_error>
46 inline bool MakeErrMsg(std::string* ErrMsg, const std::string& prefix) {
50 DWORD R = FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER |
51 FORMAT_MESSAGE_FROM_SYSTEM,
52 NULL, GetLastError(), 0, (LPSTR)&buffer, 1, NULL);
54 *ErrMsg = prefix + buffer;
56 *ErrMsg = prefix + "Unknown error";
62 template <typename HandleTraits>
64 typedef typename HandleTraits::handle_type handle_type;
67 ScopedHandle(const ScopedHandle &other); // = delete;
68 void operator=(const ScopedHandle &other); // = delete;
71 : Handle(HandleTraits::GetInvalid()) {}
73 explicit ScopedHandle(handle_type h)
77 if (HandleTraits::IsValid(Handle))
78 HandleTraits::Close(Handle);
82 handle_type t = Handle;
83 Handle = HandleTraits::GetInvalid();
87 ScopedHandle &operator=(handle_type h) {
88 if (HandleTraits::IsValid(Handle))
89 HandleTraits::Close(Handle);
94 // True if Handle is valid.
95 explicit operator bool() const {
96 return HandleTraits::IsValid(Handle) ? true : false;
99 operator handle_type() const {
104 struct CommonHandleTraits {
105 typedef HANDLE handle_type;
107 static handle_type GetInvalid() {
108 return INVALID_HANDLE_VALUE;
111 static void Close(handle_type h) {
115 static bool IsValid(handle_type h) {
116 return h != GetInvalid();
120 struct JobHandleTraits : CommonHandleTraits {
121 static handle_type GetInvalid() {
126 struct CryptContextTraits : CommonHandleTraits {
127 typedef HCRYPTPROV handle_type;
129 static handle_type GetInvalid() {
133 static void Close(handle_type h) {
134 ::CryptReleaseContext(h, 0);
137 static bool IsValid(handle_type h) {
138 return h != GetInvalid();
142 struct FindHandleTraits : CommonHandleTraits {
143 static void Close(handle_type h) {
148 struct FileHandleTraits : CommonHandleTraits {};
150 typedef ScopedHandle<CommonHandleTraits> ScopedCommonHandle;
151 typedef ScopedHandle<FileHandleTraits> ScopedFileHandle;
152 typedef ScopedHandle<CryptContextTraits> ScopedCryptContext;
153 typedef ScopedHandle<FindHandleTraits> ScopedFindHandle;
154 typedef ScopedHandle<JobHandleTraits> ScopedJobHandle;
158 class SmallVectorImpl;
161 typename SmallVectorImpl<T>::const_pointer
162 c_str(SmallVectorImpl<T> &str) {
170 std::error_code widenPath(const Twine &Path8,
171 SmallVectorImpl<wchar_t> &Path16);
172 } // end namespace path
175 std::error_code UTF8ToUTF16(StringRef utf8, SmallVectorImpl<wchar_t> &utf16);
176 std::error_code UTF16ToUTF8(const wchar_t *utf16, size_t utf16_len,
177 SmallVectorImpl<char> &utf8);
178 /// Convert from UTF16 to the current code page used in the system
179 std::error_code UTF16ToCurCP(const wchar_t *utf16, size_t utf16_len,
180 SmallVectorImpl<char> &utf8);
181 } // end namespace windows
182 } // end namespace sys
183 } // end namespace llvm.