lib/System/Win32/Win32.h

   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 // Require at least Windows 2000 API.
  20 #define _WIN32_WINNT 0x0500
  21
  22 #include "llvm/Config/config.h"     // Get autoconf configuration settings
  23 #include "windows.h"
  24 #include <cassert>
  25 #include <string>
  26
  27 inline bool MakeErrMsg(std::string* ErrMsg, const std::string& prefix) {
  28   if (!ErrMsg)
  29     return true;
  30   char *buffer = NULL;
  31   FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER|FORMAT_MESSAGE_FROM_SYSTEM,
  32       NULL, GetLastError(), 0, (LPSTR)&buffer, 1, NULL);
  33   *ErrMsg = prefix + buffer;
  34   LocalFree(buffer);
  35   return true;
  36 }
  37
  38 class AutoHandle {
  39   HANDLE handle;
  40
  41 public:
  42   AutoHandle(HANDLE h) : handle(h) {}
  43
  44   ~AutoHandle() {
  45     if (handle)
  46       CloseHandle(handle);
  47   }
  48
  49   operator HANDLE() {
  50     return handle;
  51   }
  52
  53   AutoHandle &operator=(HANDLE h) {
  54     handle = h;
  55     return *this;
  56   }
  57 };