TAO/tao/Unbounded_Reference_Allocation_Traits_T.h

   1 #ifndef guard_unbounded_reference_allocation_traits_hpp
   2 #define guard_unbounded_reference_allocation_traits_hpp
   3 /**
   4  * @file
   5  *
   6  * @brief Details can be found in the documentation for
   7  * TAO::details::generic_sequence
   8  *
   9  * @author Carlos O'Ryan
  10  */
  11
  12 #include "tao/Basic_Types.h"
  13
  14 TAO_BEGIN_VERSIONED_NAMESPACE_DECL
  15
  16 namespace TAO
  17 {
  18 namespace details
  19 {
  20 template<typename T, class ref_traits, bool dummy>
  21 struct unbounded_reference_allocation_traits
  22 {
  23   typedef T value_type;
  24   typedef ref_traits reference_traits;
  25
  26   inline static CORBA::ULong default_maximum()
  27   {
  28     return 0;
  29   }
  30
  31   inline static value_type * default_buffer_allocation()
  32   {
  33     return 0;
  34   }
  35
  36   inline static value_type * allocbuf(CORBA::ULong maximum)
  37   {
  38     if (maximum == ACE_UINT32_MAX)
  39       {
  40         return 0;
  41       }
  42     value_type * buffer = new value_type[maximum + 1];
  43     reinterpret_cast<value_type**>(buffer)[0] = buffer + maximum + 1;
  44
  45     // no throw
  46     reference_traits::initialize_range(buffer + 1, buffer + maximum + 1);
  47
  48     return buffer + 1;
  49   }
  50
  51   inline static value_type * allocbuf_noinit(CORBA::ULong maximum)
  52   {
  53     if (maximum == ACE_UINT32_MAX)
  54       {
  55         return 0;
  56       }
  57     value_type * buffer = new value_type[maximum + 1];
  58     reinterpret_cast<value_type**>(buffer)[0] = buffer + maximum + 1;
  59
  60     // no throw
  61     reference_traits::zero_range(buffer + 1, buffer + maximum + 1);
  62
  63     return buffer + 1;
  64   }
  65
  66   inline static void freebuf(value_type * buffer)
  67   {
  68     if(buffer != 0)
  69     {
  70       value_type * begin = buffer - 1;
  71       value_type * end = reinterpret_cast<value_type*>(*begin);
  72       reference_traits::release_range(buffer, end);
  73
  74       buffer = begin;
  75     }
  76     delete[] buffer;
  77   }
  78 };
  79 } // namespace details
  80 } // namespace TAO
  81
  82 TAO_END_VERSIONED_NAMESPACE_DECL
  83
  84 #endif // guard_unbounded_reference_allocation_traits_hpp