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
34 #include "llvm/ADT/SmallVector.h"
35 #include "llvm/ADT/StringExtras.h"
36 #include "llvm/ADT/StringRef.h"
37 #include "llvm/ADT/Twine.h"
38 #include "llvm/Config/config.h" // Get build system configuration settings
39 #include "llvm/Support/Compiler.h"
40 #include <system_error>
47 inline bool MakeErrMsg(std::string* ErrMsg, const std::string& prefix) {
51 DWORD LastError = GetLastError();
52 DWORD R = FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER |
53 FORMAT_MESSAGE_FROM_SYSTEM |
54 FORMAT_MESSAGE_MAX_WIDTH_MASK,
55 NULL, LastError, 0, (LPSTR)&buffer, 1, NULL);
57 *ErrMsg = prefix + ": " + buffer;
59 *ErrMsg = prefix + ": Unknown error";
60 *ErrMsg += " (0x" + llvm::utohexstr(LastError) + ")";
66 template <typename HandleTraits>
68 typedef typename HandleTraits::handle_type handle_type;
71 ScopedHandle(const ScopedHandle &other); // = delete;
72 void operator=(const ScopedHandle &other); // = delete;
75 : Handle(HandleTraits::GetInvalid()) {}
77 explicit ScopedHandle(handle_type h)
81 if (HandleTraits::IsValid(Handle))
82 HandleTraits::Close(Handle);
86 handle_type t = Handle;
87 Handle = HandleTraits::GetInvalid();
91 ScopedHandle &operator=(handle_type h) {
92 if (HandleTraits::IsValid(Handle))
93 HandleTraits::Close(Handle);
98 // True if Handle is valid.
99 explicit operator bool() const {
100 return HandleTraits::IsValid(Handle) ? true : false;
103 operator handle_type() const {
108 struct CommonHandleTraits {
109 typedef HANDLE handle_type;
111 static handle_type GetInvalid() {
112 return INVALID_HANDLE_VALUE;
115 static void Close(handle_type h) {
119 static bool IsValid(handle_type h) {
120 return h != GetInvalid();
124 struct JobHandleTraits : CommonHandleTraits {
125 static handle_type GetInvalid() {
130 struct CryptContextTraits : CommonHandleTraits {
131 typedef HCRYPTPROV handle_type;
133 static handle_type GetInvalid() {
137 static void Close(handle_type h) {
138 ::CryptReleaseContext(h, 0);
141 static bool IsValid(handle_type h) {
142 return h != GetInvalid();
146 struct FindHandleTraits : CommonHandleTraits {
147 static void Close(handle_type h) {
152 struct FileHandleTraits : CommonHandleTraits {};
154 typedef ScopedHandle<CommonHandleTraits> ScopedCommonHandle;
155 typedef ScopedHandle<FileHandleTraits> ScopedFileHandle;
156 typedef ScopedHandle<CryptContextTraits> ScopedCryptContext;
157 typedef ScopedHandle<FindHandleTraits> ScopedFindHandle;
158 typedef ScopedHandle<JobHandleTraits> ScopedJobHandle;
162 class SmallVectorImpl;
165 typename SmallVectorImpl<T>::const_pointer
166 c_str(SmallVectorImpl<T> &str) {
174 std::error_code widenPath(const Twine &Path8,
175 SmallVectorImpl<wchar_t> &Path16);
176 } // end namespace path
179 std::error_code UTF8ToUTF16(StringRef utf8, SmallVectorImpl<wchar_t> &utf16);
180 std::error_code UTF16ToUTF8(const wchar_t *utf16, size_t utf16_len,
181 SmallVectorImpl<char> &utf8);
182 /// Convert from UTF16 to the current code page used in the system
183 std::error_code UTF16ToCurCP(const wchar_t *utf16, size_t utf16_len,
184 SmallVectorImpl<char> &utf8);
185 } // end namespace windows
186 } // end namespace sys
187 } // end namespace llvm.