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
38 #include "llvm/ADT/SmallVector.h"
39 #include "llvm/ADT/StringExtras.h"
40 #include "llvm/ADT/StringRef.h"
41 #include "llvm/ADT/Twine.h"
42 #include "llvm/Config/config.h" // Get build system configuration settings
43 #include "llvm/Support/Compiler.h"
44 #include <system_error>
51 #if !defined(__CYGWIN__) && \
52 !(defined(__MINGW32__) && defined(__MINGW64_VERSION_MAJOR) && \
53 __MINGW64_VERSION_MAJOR < 3)
54 #include <VersionHelpers.h>
56 // Cygwin does not have the IsWindows8OrGreater() API.
57 // Older version of mingw-w64 does not have the API either.
58 inline bool IsWindows8OrGreater() {
59 OSVERSIONINFO osvi = {};
60 osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
61 if (!::GetVersionEx(&osvi))
63 return (osvi.dwMajorVersion > 6 ||
64 (osvi.dwMajorVersion == 6 && osvi.dwMinorVersion >= 2));
68 inline bool MakeErrMsg(std::string* ErrMsg, const std::string& prefix) {
72 DWORD LastError = GetLastError();
73 DWORD R = FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER |
74 FORMAT_MESSAGE_FROM_SYSTEM |
75 FORMAT_MESSAGE_MAX_WIDTH_MASK,
76 NULL, LastError, 0, (LPSTR)&buffer, 1, NULL);
78 *ErrMsg = prefix + ": " + buffer;
80 *ErrMsg = prefix + ": Unknown error";
81 *ErrMsg += " (0x" + llvm::utohexstr(LastError) + ")";
87 template <typename HandleTraits>
89 typedef typename HandleTraits::handle_type handle_type;
92 ScopedHandle(const ScopedHandle &other); // = delete;
93 void operator=(const ScopedHandle &other); // = delete;
96 : Handle(HandleTraits::GetInvalid()) {}
98 explicit ScopedHandle(handle_type h)
102 if (HandleTraits::IsValid(Handle))
103 HandleTraits::Close(Handle);
107 handle_type t = Handle;
108 Handle = HandleTraits::GetInvalid();
112 ScopedHandle &operator=(handle_type h) {
113 if (HandleTraits::IsValid(Handle))
114 HandleTraits::Close(Handle);
119 // True if Handle is valid.
120 explicit operator bool() const {
121 return HandleTraits::IsValid(Handle) ? true : false;
124 operator handle_type() const {
129 struct CommonHandleTraits {
130 typedef HANDLE handle_type;
132 static handle_type GetInvalid() {
133 return INVALID_HANDLE_VALUE;
136 static void Close(handle_type h) {
140 static bool IsValid(handle_type h) {
141 return h != GetInvalid();
145 struct JobHandleTraits : CommonHandleTraits {
146 static handle_type GetInvalid() {
151 struct CryptContextTraits : CommonHandleTraits {
152 typedef HCRYPTPROV handle_type;
154 static handle_type GetInvalid() {
158 static void Close(handle_type h) {
159 ::CryptReleaseContext(h, 0);
162 static bool IsValid(handle_type h) {
163 return h != GetInvalid();
167 struct FindHandleTraits : CommonHandleTraits {
168 static void Close(handle_type h) {
173 struct FileHandleTraits : CommonHandleTraits {};
175 typedef ScopedHandle<CommonHandleTraits> ScopedCommonHandle;
176 typedef ScopedHandle<FileHandleTraits> ScopedFileHandle;
177 typedef ScopedHandle<CryptContextTraits> ScopedCryptContext;
178 typedef ScopedHandle<FindHandleTraits> ScopedFindHandle;
179 typedef ScopedHandle<JobHandleTraits> ScopedJobHandle;
183 class SmallVectorImpl;
186 typename SmallVectorImpl<T>::const_pointer
187 c_str(SmallVectorImpl<T> &str) {
195 std::error_code widenPath(const Twine &Path8,
196 SmallVectorImpl<wchar_t> &Path16);
197 } // end namespace path
200 std::error_code UTF8ToUTF16(StringRef utf8, SmallVectorImpl<wchar_t> &utf16);
201 std::error_code UTF16ToUTF8(const wchar_t *utf16, size_t utf16_len,
202 SmallVectorImpl<char> &utf8);
203 /// Convert from UTF16 to the current code page used in the system
204 std::error_code UTF16ToCurCP(const wchar_t *utf16, size_t utf16_len,
205 SmallVectorImpl<char> &utf8);
206 } // end namespace windows
207 } // end namespace sys
208 } // end namespace llvm.