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437b079a29
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16359 91177308-0d34-0410-b5e6-96231b3b80d8
47 lines
1.7 KiB
C++
47 lines
1.7 KiB
C++
//===- Win32/Process.cpp - Win32 Process Implementation ------- -*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file was developed by Jeff Cohen and is distributed under the
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// University of Illinois Open Source License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file provides the Win32 specific implementation of the Process class.
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//
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//===----------------------------------------------------------------------===//
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#include "Win32.h"
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#include "llvm/System/Process.h"
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//===----------------------------------------------------------------------===//
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//=== WARNING: Implementation here must contain only Win32 specific code
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//=== and must not be UNIX code
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//===----------------------------------------------------------------------===//
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namespace llvm {
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using namespace sys;
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// This function retrieves the page size using GetSystemInfo and is present
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// solely so it can be called once in Process::GetPageSize to initialize the
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// static variable PageSize.
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inline unsigned GetPageSizeOnce() {
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// NOTE: A 32-bit application running under WOW64 is supposed to use
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// GetNativeSystemInfo. However, this interface is not present prior
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// to Windows XP so to use it requires dynamic linking. It is not clear
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// how this affects the reported page size, if at all. One could argue
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// that LLVM ought to run as 64-bits on a 64-bit system, anyway.
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SYSTEM_INFO info;
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GetSystemInfo(&info);
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return static_cast<unsigned>(info.dwPageSize);
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}
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unsigned
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Process::GetPageSize() {
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static const unsigned PageSize = GetPageSizeOnce();
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return PageSize;
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}
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}
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// vim: sw=2 smartindent smarttab tw=80 autoindent expandtab
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