lib/base/object.h

   1 #ifndef __base_object_h
   2 #define __base_object_h
   3
   4 #include <assert.h>
   5
   6 // #define OBJECT_DEBUG
   7
   8 #include <lib/base/smartptr.h>
   9 #ifdef OBJECT_DEBUG
  10 #include <lib/base/eerror.h>
  11 #endif
  12 #include <lib/base/elock.h>
  13
  14 typedef int RESULT;
  15
  16 class iObject
  17 {
  18 private:
  19                 /* we don't allow the default operator here, as it would break the refcount. */
  20         void operator=(const iObject &);
  21 protected:
  22         virtual ~iObject() { }
  23 public:
  24         virtual void AddRef()=0;
  25         virtual void Release()=0;
  26 };
  27
  28 class oRefCount
  29 {
  30         int ref;
  31 public:
  32         oRefCount(): ref(0) { }
  33         operator int&() { return ref; }
  34         ~oRefCount() {
  35 #ifdef OBJECT_DEBUG
  36                 if (ref) eDebug("OBJECT_DEBUG FATAL: %p has %d references!", this, ref); else eDebug("OBJECT_DEBUG refcount ok! (%p)", this);
  37 #endif
  38         }
  39 };
  40
  41 #ifndef SWIG
  42         #if defined(__mips__)
  43                 #define DECLARE_REF(x)                  \
  44                         private: oRefCount ref;         \
  45                         public: void AddRef();          \
  46                                         void Release();
  47                 #define DEFINE_REF(c) \
  48                         void c::AddRef() \
  49                         { \
  50                                 unsigned long temp; \
  51                                 __asm__ __volatile__( \
  52                                 "               .set    mips3           \n" \
  53                                 "1:             ll              %0, %1          \n" \
  54                                 "               .set    mips0           \n" \
  55                                 "               addu    %0, 1           \n" \
  56                                 "               .set    mips3           \n" \
  57                                 "               sc              %0, %1          \n" \
  58                                 "               .set    mips0           \n" \
  59                                 "               beqz    %0, 1b          \n" \
  60                                 : "=&r" (temp), "=m" ((int)ref) \
  61                                 : "m" ((int)ref) \
  62                                 : "memory"); \
  63                         } \
  64                         void c::Release() \
  65                         { \
  66                                 unsigned long temp; \
  67                                 __asm__ __volatile__( \
  68                                 "               .set    mips3           \n" \
  69                                 "1:             ll              %0, %1          \n" \
  70                                 "               .set    mips0           \n" \
  71                                 "               subu    %0, 1           \n" \
  72                                 "               .set    mips3           \n" \
  73                                 "               sc              %0, %1          \n" \
  74                                 "               .set    mips0           \n" \
  75                                 "               beqz    %0, 1b          \n" \
  76                                 : "=&r" (temp), "=m" ((int)ref) \
  77                                 : "m" ((int)ref) \
  78                                 : "memory"); \
  79                                 if (!ref) \
  80                                         delete this; \
  81                         }
  82         #else
  83                 #define DECLARE_REF(x)                  \
  84                         private:oRefCount ref;  \
  85                                         eSingleLock ref_lock; \
  86                         public: void AddRef();          \
  87                                         void Release();
  88                 #ifdef OBJECT_DEBUG
  89                         extern int object_total_remaining;
  90                         #define DEFINE_REF(c) \
  91                                 void c::AddRef() \
  92                                 { \
  93                                         eSingleLocker l(ref_lock); \
  94                                         ++object_total_remaining; \
  95                                         ++ref; \
  96                                         eDebug("OBJECT_DEBUG " #c "+%p now %d", this, (int)ref); \
  97                                 } \
  98                                 void c::Release() \
  99                                 { \
 100                                         { \
 101                                                 eSingleLocker l(ref_lock); \
 102                                                 --object_total_remaining; \
 103                                                 --ref; \
 104                                                 eDebug("OBJECT_DEBUG " #c "-%p now %d", this, ref); \
 105                                         } \
 106                                         if (!ref) \
 107                                                 delete this; \
 108                                 }
 109                                 #error fix locking for debug
 110                 #else
 111                         #define DEFINE_REF(c) \
 112                                 void c::AddRef() \
 113                                 { \
 114                                         eSingleLocker l(ref_lock); \
 115                                         ++ref; \
 116                                 } \
 117                                 void c::Release() \
 118                                 { \
 119                                         { \
 120                                                 eSingleLocker l(ref_lock); \
 121                                                 --ref; \
 122                                         } \
 123                                         if (!ref) \
 124                                                 delete this; \
 125                                 }
 126                 #endif
 127         #endif
 128 #else
 129         #define DECLARE_REF(x) \
 130                 private: \
 131                         void AddRef(); \
 132                         void Release();
 133 #endif
 134
 135 #ifdef SWIG
 136 class Object
 137 {
 138 };
 139 #endif
 140
 141 #endif