[llvm-commits] CVS: llvm/lib/System/Win32/Process.cpp

[Reid Spencer]

Changes in directory llvm/lib/System/Win32:

Process.cpp added (r1.1)
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Log message:

Initial implementation of the Process abstraction for Win32.


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Diffs of the changes:  (+46 -0)

Index: llvm/lib/System/Win32/Process.cpp
diff -c /dev/null llvm/lib/System/Win32/Process.cpp:1.1
*** /dev/null	Wed Sep 15 00:47:50 2004
--- llvm/lib/System/Win32/Process.cpp	Wed Sep 15 00:47:40 2004
***************
*** 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