include/salhelper/refobj.hxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #ifndef INCLUDED_SALHELPER_REFOBJ_HXX
  21 #define INCLUDED_SALHELPER_REFOBJ_HXX
  22
  23 #include <sal/types.h>
  24 #include <rtl/alloc.h>
  25 #include <osl/diagnose.h>
  26 #include <osl/interlck.h>
  27
  28 namespace salhelper
  29 {
  30
  31 /** A base implementation for reference-counted objects.
  32
  33     @deprecated use salhelper::SimpleReferenceObject instead
  34 */
  35 class ReferenceObject
  36 {
  37     /** Representation.
  38      */
  39     oslInterlockedCount m_nReferenceCount;
  40
  41     ReferenceObject (const ReferenceObject&) SAL_DELETED_FUNCTION;
  42     ReferenceObject& operator= (const ReferenceObject&) SAL_DELETED_FUNCTION;
  43
  44 public:
  45     /** Allocation.
  46      */
  47     static void* operator new (size_t n)
  48     {
  49         return ::rtl_allocateMemory (n);
  50     }
  51     static void operator delete (void* p)
  52     {
  53         ::rtl_freeMemory (p);
  54     }
  55     static void* operator new (size_t, void* p)
  56     {
  57         return p;
  58     }
  59     static void operator delete (void*, void*)
  60     {}
  61
  62 public:
  63     /** Construction.
  64      */
  65     inline ReferenceObject() : m_nReferenceCount(0)
  66     {}
  67
  68
  69     void SAL_CALL acquire()
  70     {
  71         osl_atomic_increment(&m_nReferenceCount);
  72     }
  73
  74     void SAL_CALL release()
  75     {
  76         if (osl_atomic_decrement(&m_nReferenceCount) == 0)
  77         {
  78             // Last reference released.
  79             delete this;
  80         }
  81     }
  82
  83 protected:
  84     /** Destruction.
  85      */
  86     virtual ~ReferenceObject()
  87     {
  88         OSL_ASSERT(m_nReferenceCount == 0);
  89     }
  90 };
  91
  92
  93
  94 } // namespace salhelper
  95
  96 #endif /* ! INCLUDED_SALHELPER_REFOBJ_HXX */
  97
  98 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */