comparison DEPENDENCIES/generic/include/boost/interprocess/detail/utilities.hpp @ 16:2665513ce2d3

Add boost headers

+//////////////////////////////////////////////////////////////////////////////
+//
+// (C) Copyright Ion Gaztanaga 2005-2012.
+// (C) Copyright Gennaro Prota 2003 - 2004.
+//
+// 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_DETAIL_UTILITIES_HPP
+#define BOOST_INTERPROCESS_DETAIL_UTILITIES_HPP
+
+#if (defined _MSC_VER) && (_MSC_VER >= 1200)
+#  pragma once
+#endif
+
+#include <boost/interprocess/detail/config_begin.hpp>
+#include <boost/interprocess/detail/workaround.hpp>
+
+#include <boost/interprocess/interprocess_fwd.hpp>
+#include <boost/move/move.hpp>
+#include <boost/type_traits/has_trivial_destructor.hpp>
+#include <boost/interprocess/detail/min_max.hpp>
+#include <boost/interprocess/detail/type_traits.hpp>
+#include <boost/interprocess/detail/transform_iterator.hpp>
+#include <boost/interprocess/detail/mpl.hpp>
+#include <boost/interprocess/containers/version_type.hpp>
+#include <boost/intrusive/pointer_traits.hpp>
+#include <boost/move/move.hpp>
+#include <boost/static_assert.hpp>
+#include <utility>
+#include <algorithm>
+#include <climits>
+
+namespace boost {
+namespace interprocess {
+namespace ipcdetail {
+
+template <class T>
+inline T* to_raw_pointer(T* p)
+{  return p; }
+
+template <class Pointer>
+inline typename boost::intrusive::pointer_traits<Pointer>::element_type*
+to_raw_pointer(const Pointer &p)
+{  return boost::interprocess::ipcdetail::to_raw_pointer(p.operator->());  }
+
+//!To avoid ADL problems with swap
+template <class T>
+inline void do_swap(T& x, T& y)
+{
+   using std::swap;
+   swap(x, y);
+}
+
+//Rounds "orig_size" by excess to round_to bytes
+template<class SizeType>
+inline SizeType get_rounded_size(SizeType orig_size, SizeType round_to)
+{
+   return ((orig_size-1)/round_to+1)*round_to;
+}
+
+//Truncates "orig_size" to a multiple of "multiple" bytes.
+template<class SizeType>
+inline SizeType get_truncated_size(SizeType orig_size, SizeType multiple)
+{
+   return orig_size/multiple*multiple;
+}
+
+//Rounds "orig_size" by excess to round_to bytes. round_to must be power of two
+template<class SizeType>
+inline SizeType get_rounded_size_po2(SizeType orig_size, SizeType round_to)
+{
+   return ((orig_size-1)&(~(round_to-1))) + round_to;
+}
+
+//Truncates "orig_size" to a multiple of "multiple" bytes. multiple must be power of two
+template<class SizeType>
+inline SizeType get_truncated_size_po2(SizeType orig_size, SizeType multiple)
+{
+   return (orig_size & (~(multiple-1)));
+}
+
+template <std::size_t OrigSize, std::size_t RoundTo>
+struct ct_rounded_size
+{
+   BOOST_STATIC_ASSERT((RoundTo != 0));
+   static const std::size_t intermediate_value = (OrigSize-1)/RoundTo+1;
+   BOOST_STATIC_ASSERT(intermediate_value <= std::size_t(-1)/RoundTo);
+   static const std::size_t value = intermediate_value*RoundTo;
+};
+
+// Gennaro Prota wrote this. Thanks!
+template <int p, int n = 4>
+struct ct_max_pow2_less
+{
+   static const std::size_t c = 2*n < p;
+
+   static const std::size_t value =
+         c ? (ct_max_pow2_less< c*p, 2*c*n>::value) : n;
+};
+
+template <>
+struct ct_max_pow2_less<0, 0>
+{
+   static const std::size_t value = 0;
+};
+
+}  //namespace ipcdetail {
+
+//!Trait class to detect if an index is a node
+//!index. This allows more efficient operations
+//!when deallocating named objects.
+template <class Index>
+struct is_node_index
+{
+   static const bool value = false;
+};
+
+//!Trait class to detect if an index is an intrusive
+//!index. This will embed the derivation hook in each
+//!allocation header, to provide memory for the intrusive
+//!container.
+template <class Index>
+struct is_intrusive_index
+{
+   static const bool value = false;
+};
+
+template <typename T> T*
+addressof(T& v)
+{
+  return reinterpret_cast<T*>(
+       &const_cast<char&>(reinterpret_cast<const volatile char &>(v)));
+}
+
+template<class SizeType>
+struct sqrt_size_type_max
+{
+   static const SizeType value = (SizeType(1) << (sizeof(SizeType)*(CHAR_BIT/2)))-1;
+};
+
+template<class SizeType>
+inline bool multiplication_overflows(SizeType a, SizeType b)
+{
+   const SizeType sqrt_size_max = sqrt_size_type_max<SizeType>::value;
+   return   //Fast runtime check 
+         (  (a | b) > sqrt_size_max &&
+            //Slow division check 
+            b && a > SizeType(-1)/b
+         );
+}
+
+template<std::size_t SztSizeOfType, class SizeType>
+inline bool size_overflows(SizeType count)
+{
+   //Compile time-check
+   BOOST_STATIC_ASSERT(SztSizeOfType <= SizeType(-1));
+   //Runtime check
+   return multiplication_overflows(SizeType(SztSizeOfType), count);
+}
+
+template<class RawPointer>
+class pointer_size_t_caster
+{
+   public:
+   explicit pointer_size_t_caster(std::size_t sz)
+      : m_ptr(reinterpret_cast<RawPointer>(sz))
+   {}
+
+   explicit pointer_size_t_caster(RawPointer p)
+      : m_ptr(p)
+   {}
+
+   std::size_t size() const
+   {   return reinterpret_cast<std::size_t>(m_ptr);   }
+
+   RawPointer pointer() const
+   {   return m_ptr;   }
+
+   private:
+   RawPointer m_ptr;
+};
+
+
+template<class SizeType>
+inline bool sum_overflows(SizeType a, SizeType b)
+{  return SizeType(-1) - a < b;  }
+
+//Anti-exception node eraser
+template<class Cont>
+class value_eraser
+{
+   public:
+   value_eraser(Cont & cont, typename Cont::iterator it)
+      : m_cont(cont), m_index_it(it), m_erase(true){}
+   ~value_eraser()
+   {  if(m_erase) m_cont.erase(m_index_it);  }
+
+   void release() {  m_erase = false;  }
+
+   private:
+   Cont                   &m_cont;
+   typename Cont::iterator m_index_it;
+   bool                    m_erase;
+};
+
+}  //namespace interprocess {
+}  //namespace boost {
+
+#include <boost/interprocess/detail/config_end.hpp>
+
+#endif   //#ifndef BOOST_INTERPROCESS_DETAIL_UTILITIES_HPP
+