| //===- Win32/Process.cpp - Win32 Process Implementation ------- -*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file was developed by Jeff Cohen and is distributed under the |
| // University of Illinois Open Source License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file provides the Win32 specific implementation of the Process class. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "Win32.h" |
| |
| //===----------------------------------------------------------------------===// |
| //=== WARNING: Implementation here must contain only Win32 specific code |
| //=== and must not be UNIX code |
| //===----------------------------------------------------------------------===// |
| |
| namespace llvm { |
| using namespace sys; |
| |
| // This function retrieves the page size using GetSystemInfo and is present |
| // solely so it can be called once in Process::GetPageSize to initialize the |
| // static variable PageSize. |
| inline unsigned GetPageSizeOnce() { |
| // NOTE: A 32-bit application running under WOW64 is supposed to use |
| // GetNativeSystemInfo. However, this interface is not present prior |
| // to Windows XP so to use it requires dynamic linking. It is not clear |
| // how this affects the reported page size, if at all. One could argue |
| // that LLVM ought to run as 64-bits on a 64-bit system, anyway. |
| SYSTEM_INFO info; |
| GetSystemInfo(&info); |
| return static_cast<unsigned>(info.dwPageSize); |
| } |
| |
| unsigned |
| Process::GetPageSize() { |
| static const unsigned PageSize = GetPageSizeOnce(); |
| return PageSize; |
| } |
| |
| } |
| // vim: sw=2 smartindent smarttab tw=80 autoindent expandtab |