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Posted 27 Sep 2004

Smart Pointers to boost your code

, 27 Sep 2004
A beginner's introduction to the smart pointers provided by the boost library.
//  (C) Copyright John Maddock 2001 - 2003. 
//  (C) Copyright Bill Kempf 2001. 
//  (C) Copyright Aleksey Gurtovoy 2003. 
//  Use, modification and distribution are subject to the 
//  Boost Software License, Version 1.0. (See accompanying file 
//  LICENSE_1_0.txt or copy at

//  See for most recent version.

//  Win32 specific config options:

#define BOOST_PLATFORM "Win32"

#if defined(__GNUC__) && !defined(BOOST_NO_SWPRINTF)

#if !defined(__GNUC__) && !defined(BOOST_HAS_DECLSPEC)

#if defined(__MINGW32__) && ((__GNUC__ > 3) || ((__GNUC__ == 3) && (__GNUC_MINOR__ >= 2)))

// Win32 will normally be using native Win32 threads,
// but there is a pthread library avaliable as an option,
// we used to disable this when BOOST_DISABLE_WIN32 was 
// defined but no longer - this should allow some
// files to be compiled in strict mode - while maintaining
// a consistent setting of BOOST_HAS_THREADS across
// all translation units (needed for shared_ptr etc).

// WEK: Added


// disable min/max macros:
#ifdef min
#  undef min
#ifdef max
#  undef max
#ifndef NOMINMAX
#  define NOMINMAX

#include <algorithm> // for existing std::min and std::max
namespace std{
  // Apparently, something in the Microsoft libraries requires the "long"
  // overload, because it calls the min/max functions with arguments of
  // slightly different type.  (If this proves to be incorrect, this
  // whole "BOOST_MSVC" section can be removed.)
  inline long min(long __a, long __b) {
    return __b < __a ? __b : __a;
  inline long max(long __a, long __b) {
    return  __a < __b ? __b : __a;
  // The "long double" overload is required, otherwise user code calling
  // min/max for floating-point numbers will use the "long" overload.
  // (SourceForge bug #495495)
  inline long double min(long double __a, long double __b) {
    return __b < __a ? __b : __a;
  inline long double max(long double __a, long double __b) {
    return  __a < __b ? __b : __a;
using std::min;
using std::max;
#     endif

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About the Author

Germany Germany
Peter is tired of being called "Mr. Chen", even so certain individuals insist on it. No, he's not chinese.

Peter has seen lots of boxes you youngsters wouldn't even accept as calculators. He is proud of having visited the insides of a 16 Bit Machine.

In his spare time he ponders new ways of turning groceries into biohazards, or tries to coax South American officials to add some stamps to his passport.

Beyond these trivialities Peter works for Klippel[^], a small german company that wants to make mankind happier by selling them novel loudspeaker measurement equipment.

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