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//===- 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"
#include "llvm/System/Process.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
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