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[lyx.git] / boost / boost / detail / atomic_count.hpp

diff --git a/boost/boost/detail/atomic_count.hpp b/boost/boost/detail/atomic_count.hpp
index 9985b2cede5bb0b4ffdbaa4fc8fdc3db035ffc17..5411c7ae99041fbf6c61dd90789ca0f6ca09330a 100644 (file)
--- a/boost/boost/detail/atomic_count.hpp
+++ b/boost/boost/detail/atomic_count.hpp
@@ -12,97 +12,10 @@
 //
 //  Copyright (c) 2001, 2002 Peter Dimov and Multi Media Ltd.
 //
-// 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)
-//
-//  typedef <implementation-defined> boost::detail::atomic_count;
-//
-//  atomic_count a(n);
-//
-//    (n is convertible to long)
-//
-//    Effects: Constructs an atomic_count with an initial value of n
-//
-//  a;
-//
-//    Returns: (long) the current value of a
-//
-//  ++a;
-//
-//    Effects: Atomically increments the value of a
-//    Returns: nothing
-//
-//  --a;
-//
-//    Effects: Atomically decrements the value of a
-//    Returns: (long) zero if the new value of a is zero,
-//      unspecified non-zero value otherwise (usually the new value)
-//
-//    Important note: when --a returns zero, it must act as a
-//      read memory barrier (RMB); i.e. the calling thread must
-//      have a synchronized view of the memory
-//
-//    On Intel IA-32 (x86) memory is always synchronized, so this
-//      is not a problem.
-//
-//    On many architectures the atomic instructions already act as
-//      a memory barrier.
-//
-//    This property is necessary for proper reference counting, since
-//      a thread can update the contents of a shared object, then
-//      release its reference, and another thread may immediately
-//      release the last reference causing object destruction.
-//
-//    The destructor needs to have a synchronized view of the
-//      object to perform proper cleanup.
-//
-//    Original example by Alexander Terekhov:
-//
-//    Given:
-//
-//    - a mutable shared object OBJ;
-//    - two threads THREAD1 and THREAD2 each holding 
-//      a private smart_ptr object pointing to that OBJ.
-//
-//    t1: THREAD1 updates OBJ (thread-safe via some synchronization)
-//      and a few cycles later (after "unlock") destroys smart_ptr;
-//
-//    t2: THREAD2 destroys smart_ptr WITHOUT doing any synchronization 
-//      with respect to shared mutable object OBJ; OBJ destructors
-//      are called driven by smart_ptr interface...
-//
-
-#include <boost/config.hpp>
-
-#ifndef BOOST_HAS_THREADS
-
-namespace boost
-{
+//  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
 
-namespace detail
-{
-
-typedef long atomic_count;
-
-}
-
-}
-
-#elif defined(BOOST_AC_USE_PTHREADS)
-#  include <boost/detail/atomic_count_pthreads.hpp>
-#elif defined(WIN32) || defined(_WIN32) || defined(__WIN32__)
-#  include <boost/detail/atomic_count_win32.hpp>
-#elif defined(__GLIBCPP__) || defined(__GLIBCXX__)
-#  include <boost/detail/atomic_count_gcc.hpp>
-#elif defined(BOOST_HAS_PTHREADS)
-#  define BOOST_AC_USE_PTHREADS
-#  include <boost/detail/atomic_count_pthreads.hpp>
-#else
-
-// Use #define BOOST_DISABLE_THREADS to avoid the error
-#error Unrecognized threading platform
-
-#endif
+#include <boost/smart_ptr/detail/atomic_count.hpp>
 
 #endif // #ifndef BOOST_DETAIL_ATOMIC_COUNT_HPP_INCLUDED