1//===- Win32/Win32.h - Common Win32 Include File ----------------*- C++ -*-===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This file defines things specific to Win32 implementations.
11//
12//===----------------------------------------------------------------------===//
13
14//===----------------------------------------------------------------------===//
15//=== WARNING: Implementation here must contain only generic Win32 code that
16//===          is guaranteed to work on *all* Win32 variants.
17//===----------------------------------------------------------------------===//
18
19// mingw-w64 tends to define it as 0x0502 in its headers.
20#undef _WIN32_WINNT
21
22// Require at least Windows XP(5.1) API.
23#define _WIN32_WINNT 0x0501
24#define _WIN32_IE    0x0600 // MinGW at it again.
25#define WIN32_LEAN_AND_MEAN
26
27#include "llvm/Config/config.h" // Get build system configuration settings
28#include <windows.h>
29#include <shlobj.h>
30#include <cassert>
31#include <string>
32
33inline bool MakeErrMsg(std::string* ErrMsg, const std::string& prefix) {
34  if (!ErrMsg)
35    return true;
36  char *buffer = NULL;
37  FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER|FORMAT_MESSAGE_FROM_SYSTEM,
38      NULL, GetLastError(), 0, (LPSTR)&buffer, 1, NULL);
39  *ErrMsg = prefix + buffer;
40  LocalFree(buffer);
41  return true;
42}
43
44class AutoHandle {
45  HANDLE handle;
46
47public:
48  AutoHandle(HANDLE h) : handle(h) {}
49
50  ~AutoHandle() {
51    if (handle)
52      CloseHandle(handle);
53  }
54
55  operator HANDLE() {
56    return handle;
57  }
58
59  AutoHandle &operator=(HANDLE h) {
60    handle = h;
61    return *this;
62  }
63};
64
65template <class HandleType, uintptr_t InvalidHandle,
66          class DeleterType, DeleterType D>
67class ScopedHandle {
68  HandleType Handle;
69
70public:
71  ScopedHandle() : Handle(InvalidHandle) {}
72  ScopedHandle(HandleType handle) : Handle(handle) {}
73
74  ~ScopedHandle() {
75    if (Handle != HandleType(InvalidHandle))
76      D(Handle);
77  }
78
79  HandleType take() {
80    HandleType temp = Handle;
81    Handle = HandleType(InvalidHandle);
82    return temp;
83  }
84
85  operator HandleType() const { return Handle; }
86
87  ScopedHandle &operator=(HandleType handle) {
88    Handle = handle;
89    return *this;
90  }
91
92  typedef void (*unspecified_bool_type)();
93  static void unspecified_bool_true() {}
94
95  // True if Handle is valid.
96  operator unspecified_bool_type() const {
97    return Handle == HandleType(InvalidHandle) ? 0 : unspecified_bool_true;
98  }
99
100  bool operator!() const {
101    return Handle == HandleType(InvalidHandle);
102  }
103};
104
105typedef ScopedHandle<HANDLE, uintptr_t(-1),
106                      BOOL (WINAPI*)(HANDLE), ::FindClose>
107  ScopedFindHandle;
108
109namespace llvm {
110template <class T>
111class SmallVectorImpl;
112
113template <class T>
114typename SmallVectorImpl<T>::const_pointer
115c_str(SmallVectorImpl<T> &str) {
116  str.push_back(0);
117  str.pop_back();
118  return str.data();
119}
120} // end namespace llvm.
121