diff options
| -rw-r--r-- | lib/System/Win32/Process.cpp | 46 | ||||
| -rw-r--r-- | lib/System/Win32/Process.inc | 46 |
2 files changed, 92 insertions, 0 deletions
diff --git a/lib/System/Win32/Process.cpp b/lib/System/Win32/Process.cpp new file mode 100644 index 0000000..6157258 --- /dev/null +++ b/lib/System/Win32/Process.cpp @@ -0,0 +1,46 @@ +//===- 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 diff --git a/lib/System/Win32/Process.inc b/lib/System/Win32/Process.inc new file mode 100644 index 0000000..6157258 --- /dev/null +++ b/lib/System/Win32/Process.inc @@ -0,0 +1,46 @@ +//===- 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 |