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 7 API.
30 #define _WIN32_WINNT 0x0601
31 #define _WIN32_IE 0x0800 // MinGW at it again. FIXME: verify if still needed.
32 #define WIN32_LEAN_AND_MEAN
36 #include "llvm/ADT/SmallVector.h"
37 #include "llvm/ADT/StringExtras.h"
38 #include "llvm/ADT/StringRef.h"
39 #include "llvm/ADT/Twine.h"
40 #include "llvm/Config/config.h" // Get build system configuration settings
41 #include "llvm/Support/Compiler.h"
42 #include <system_error>
50 #include <VersionHelpers.h>
52 // Cygwin does not have the IsWindows8OrGreater() API.
53 inline bool IsWindows8OrGreater() {
54 OSVERSIONINFO osvi = {};
55 osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
56 if (!::GetVersionEx(&osvi))
58 return (osvi.dwMajorVersion > 6 ||
59 (osvi.dwMajorVersion == 6 && osvi.dwMinorVersion >= 2));
63 inline bool MakeErrMsg(std::string* ErrMsg, const std::string& prefix) {
67 DWORD LastError = GetLastError();
68 DWORD R = FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER |
69 FORMAT_MESSAGE_FROM_SYSTEM |
70 FORMAT_MESSAGE_MAX_WIDTH_MASK,
71 NULL, LastError, 0, (LPSTR)&buffer, 1, NULL);
73 *ErrMsg = prefix + ": " + buffer;
75 *ErrMsg = prefix + ": Unknown error";
76 *ErrMsg += " (0x" + llvm::utohexstr(LastError) + ")";
82 template <typename HandleTraits>
84 typedef typename HandleTraits::handle_type handle_type;
87 ScopedHandle(const ScopedHandle &other); // = delete;
88 void operator=(const ScopedHandle &other); // = delete;
91 : Handle(HandleTraits::GetInvalid()) {}
93 explicit ScopedHandle(handle_type h)
97 if (HandleTraits::IsValid(Handle))
98 HandleTraits::Close(Handle);
102 handle_type t = Handle;
103 Handle = HandleTraits::GetInvalid();
107 ScopedHandle &operator=(handle_type h) {
108 if (HandleTraits::IsValid(Handle))
109 HandleTraits::Close(Handle);
114 // True if Handle is valid.
115 explicit operator bool() const {
116 return HandleTraits::IsValid(Handle) ? true : false;
119 operator handle_type() const {
124 struct CommonHandleTraits {
125 typedef HANDLE handle_type;
127 static handle_type GetInvalid() {
128 return INVALID_HANDLE_VALUE;
131 static void Close(handle_type h) {
135 static bool IsValid(handle_type h) {
136 return h != GetInvalid();
140 struct JobHandleTraits : CommonHandleTraits {
141 static handle_type GetInvalid() {
146 struct CryptContextTraits : CommonHandleTraits {
147 typedef HCRYPTPROV handle_type;
149 static handle_type GetInvalid() {
153 static void Close(handle_type h) {
154 ::CryptReleaseContext(h, 0);
157 static bool IsValid(handle_type h) {
158 return h != GetInvalid();
162 struct FindHandleTraits : CommonHandleTraits {
163 static void Close(handle_type h) {
168 struct FileHandleTraits : CommonHandleTraits {};
170 typedef ScopedHandle<CommonHandleTraits> ScopedCommonHandle;
171 typedef ScopedHandle<FileHandleTraits> ScopedFileHandle;
172 typedef ScopedHandle<CryptContextTraits> ScopedCryptContext;
173 typedef ScopedHandle<FindHandleTraits> ScopedFindHandle;
174 typedef ScopedHandle<JobHandleTraits> ScopedJobHandle;
178 class SmallVectorImpl;
181 typename SmallVectorImpl<T>::const_pointer
182 c_str(SmallVectorImpl<T> &str) {
190 std::error_code widenPath(const Twine &Path8,
191 SmallVectorImpl<wchar_t> &Path16);
192 } // end namespace path
195 std::error_code UTF8ToUTF16(StringRef utf8, SmallVectorImpl<wchar_t> &utf16);
196 std::error_code UTF16ToUTF8(const wchar_t *utf16, size_t utf16_len,
197 SmallVectorImpl<char> &utf8);
198 /// Convert from UTF16 to the current code page used in the system
199 std::error_code UTF16ToCurCP(const wchar_t *utf16, size_t utf16_len,
200 SmallVectorImpl<char> &utf8);
201 } // end namespace windows
202 } // end namespace sys
203 } // end namespace llvm.