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 #include <VersionHelpers.h>
55 // Cygwin does not have the IsWindows8OrGreater() API.
56 // Mingw32 does not have the API either (but mingw-w64 does).
57 inline bool IsWindows8OrGreater() {
58 OSVERSIONINFO osvi = {};
59 osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
60 if (!::GetVersionEx(&osvi))
62 return (osvi.dwMajorVersion > 6 ||
63 (osvi.dwMajorVersion == 6 && osvi.dwMinorVersion >= 2));
67 inline bool MakeErrMsg(std::string* ErrMsg, const std::string& prefix) {
71 DWORD LastError = GetLastError();
72 DWORD R = FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER |
73 FORMAT_MESSAGE_FROM_SYSTEM |
74 FORMAT_MESSAGE_MAX_WIDTH_MASK,
75 NULL, LastError, 0, (LPSTR)&buffer, 1, NULL);
77 *ErrMsg = prefix + ": " + buffer;
79 *ErrMsg = prefix + ": Unknown error";
80 *ErrMsg += " (0x" + llvm::utohexstr(LastError) + ")";
86 template <typename HandleTraits>
88 typedef typename HandleTraits::handle_type handle_type;
91 ScopedHandle(const ScopedHandle &other); // = delete;
92 void operator=(const ScopedHandle &other); // = delete;
95 : Handle(HandleTraits::GetInvalid()) {}
97 explicit ScopedHandle(handle_type h)
101 if (HandleTraits::IsValid(Handle))
102 HandleTraits::Close(Handle);
106 handle_type t = Handle;
107 Handle = HandleTraits::GetInvalid();
111 ScopedHandle &operator=(handle_type h) {
112 if (HandleTraits::IsValid(Handle))
113 HandleTraits::Close(Handle);
118 // True if Handle is valid.
119 explicit operator bool() const {
120 return HandleTraits::IsValid(Handle) ? true : false;
123 operator handle_type() const {
128 struct CommonHandleTraits {
129 typedef HANDLE handle_type;
131 static handle_type GetInvalid() {
132 return INVALID_HANDLE_VALUE;
135 static void Close(handle_type h) {
139 static bool IsValid(handle_type h) {
140 return h != GetInvalid();
144 struct JobHandleTraits : CommonHandleTraits {
145 static handle_type GetInvalid() {
150 struct CryptContextTraits : CommonHandleTraits {
151 typedef HCRYPTPROV handle_type;
153 static handle_type GetInvalid() {
157 static void Close(handle_type h) {
158 ::CryptReleaseContext(h, 0);
161 static bool IsValid(handle_type h) {
162 return h != GetInvalid();
166 struct FindHandleTraits : CommonHandleTraits {
167 static void Close(handle_type h) {
172 struct FileHandleTraits : CommonHandleTraits {};
174 typedef ScopedHandle<CommonHandleTraits> ScopedCommonHandle;
175 typedef ScopedHandle<FileHandleTraits> ScopedFileHandle;
176 typedef ScopedHandle<CryptContextTraits> ScopedCryptContext;
177 typedef ScopedHandle<FindHandleTraits> ScopedFindHandle;
178 typedef ScopedHandle<JobHandleTraits> ScopedJobHandle;
182 class SmallVectorImpl;
185 typename SmallVectorImpl<T>::const_pointer
186 c_str(SmallVectorImpl<T> &str) {
194 std::error_code widenPath(const Twine &Path8,
195 SmallVectorImpl<wchar_t> &Path16);
196 } // end namespace path
199 std::error_code UTF8ToUTF16(StringRef utf8, SmallVectorImpl<wchar_t> &utf16);
200 std::error_code UTF16ToUTF8(const wchar_t *utf16, size_t utf16_len,
201 SmallVectorImpl<char> &utf8);
202 /// Convert from UTF16 to the current code page used in the system
203 std::error_code UTF16ToCurCP(const wchar_t *utf16, size_t utf16_len,
204 SmallVectorImpl<char> &utf8);
205 } // end namespace windows
206 } // end namespace sys
207 } // end namespace llvm.