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diff --git a/boost/interprocess/sync/xsi/simple_xsi_semaphore.hpp b/boost/interprocess/sync/xsi/simple_xsi_semaphore.hpp
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--- a/boost/interprocess/sync/xsi/simple_xsi_semaphore.hpp
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-//////////////////////////////////////////////////////////////////////////////
-//
-// (C) Copyright Ion Gaztanaga 2011-2012. Distributed under the Boost
-// Software License, Version 1.0. (See accompanying file
-// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
-//
-// See http://www.boost.org/libs/interprocess for documentation.
-//
-//////////////////////////////////////////////////////////////////////////////
-#ifndef BOOST_INTERPROCESS_SYNC_XSI_SIMPLE_XSI_SEMAPHORE_HPP
-#define BOOST_INTERPROCESS_SYNC_XSI_SIMPLE_XSI_SEMAPHORE_HPP
-
-#ifndef BOOST_CONFIG_HPP
-#  include <boost/config.hpp>
-#endif
-#
-#if defined(BOOST_HAS_PRAGMA_ONCE)
-#  pragma once
-#endif
-
-/*
- * Provide an simpler and easier to understand interface to the System V
- * semaphore system calls.  There are 7 routines available to the user:
- *
- *      id = sem_create(key, initval);  # create with initial value or open
- *      id = sem_open(key);             # open (must already exist)
- *      sem_wait(id);                   # wait = P = down by 1
- *      sem_signal(id);                 # signal = V = up by 1
- *      sem_op(id, amount);             # wait   if (amount < 0)
- *                                      # signal if (amount > 0)
- *      sem_close(id);                  # close
- *      sem_rm(id);                     # remove (delete)
- *
- * We create and use a 3-member set for the requested semaphore.
- * The first member, [0], is the actual semaphore value, and the second
- * member, [1], is a counter used to know when all processes have finished
- * with the semaphore.  The counter is initialized to a large number,
- * decremented on every create or open and incremented on every close.
- * This way we can use the "adjust" feature provided by System V so that
- * any process that exit's without calling sem_close() is accounted
- * for.  It doesn't help us if the last process does this (as we have
- * no way of getting control to remove the semaphore) but it will
- * work if any process other than the last does an exit (intentional
- * or unintentional).
- * The third member, [2], of the semaphore set is used as a lock variable
- * to avoid any race conditions in the sem_create() and sem_close()
- * functions.
- */
-
-#include <sys/ipc.h>
-#include <sys/sem.h>
-#include <errno.h>
-
-namespace boost {
-namespace interprocess {
-namespace xsi {
-
-// Create a semaphore with a specified initial value.
-// If the semaphore already exists, we don't initialize it (of course).
-// We return the semaphore ID if all OK, else -1.
-
-inline bool simple_sem_open_or_create(::key_t key, int initval, int &semid, int perm)
-{
-   int id, semval;
-   semid = -1;
-
-   if (key == IPC_PRIVATE)
-      return false; //not intended for private semaphores
-
-   else if (key == (::key_t) -1)
-      return false; //probably an ftok() error by caller
-
-   again:
-   if ((id = ::semget(key, 1, (perm & 0x01FF) | IPC_CREAT)) < 0)
-      return false;   //permission problem or tables full
-
-   semid = id;
-   return true;
-}
-
-/****************************************************************************
- * Remove a semaphore.
- * This call is intended to be called by a server, for example,
- * when it is being shut down, as we do an IPC_RMID on the semaphore,
- * regardless whether other processes may be using it or not.
- * Most other processes should use sem_close() below.
- */
-
-inline bool simple_sem_rm(int id)
-{
-   if (::semctl(id, 0, IPC_RMID, 0) < 0)
-      return false;
-   return true;
-}
-
-
-/****************************************************************************
- * General semaphore operation.  Increment or decrement by a user-specified
- * amount (positive or negative; amount can't be zero).
- */
-
-inline bool simple_sem_op(int id, int value, bool undo = true)
-{
-   ::sembuf op_op[1] = {
-      0, 99, 0 // decrement or increment [0] with undo on exit
-               // the 99 is set to the actual amount to add
-               // or subtract (positive or negative)
-   };
-   if(undo){
-      op_op[0].sem_flg = SEM_UNDO;
-   }
-   if ((op_op[0].sem_op = value) == 0)
-      return false;
-
-   if (::semop(id, &op_op[0], 1) < 0)
-      return false;
-   return true;
-}
-
-}  //namespace xsi {
-}  //namespace interprocess {
-}  //namespace boost {
-
-#endif //BOOST_INTERPROCESS_SYNC_XSI_SIMPLE_XSI_SEMAPHORE_HPP