code.vuplus.com Git - vuplus_dvbapp/blob - 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 struct oRefCount
  29 {
  30         volatile int count;
  31         oRefCount(): count(0) { }
  32         operator volatile int&() { return count; }
  33         ~oRefCount() {
  34 #ifdef OBJECT_DEBUG
  35                 if (count) eDebug("OBJECT_DEBUG FATAL: %p has %d references!", this, ref); else eDebug("OBJECT_DEBUG refcount ok! (%p)", this);
  36 #endif
  37         }
  38 };
  39
  40 #ifndef SWIG
  41         #if defined(__mips__)
  42                 #define DECLARE_REF(x)                  \
  43                         private: oRefCount ref;         \
  44                         public: void AddRef();          \
  45                                         void Release();
  46                 #define DEFINE_REF(c) \
  47                         void c::AddRef() \
  48                         { \
  49                                 unsigned long temp; \
  50                                 __asm__ __volatile__( \
  51                                 "               .set    mips3                                                                                   \n" \
  52                                 "1:             ll              %0, %1  # load counter                                                  \n" \
  53                                 "               .set    mips0                                                                                   \n" \
  54                                 "               addu    %0, 1   # increment                                                             \n" \
  55                                 "               .set    mips3                                                                                   \n" \
  56                                 "               sc              %0, %1  # try to store, checking for atomicity  \n" \
  57                                 "               .set    mips0                                                                                   \n" \
  58                                 "               beqz    %0, 1b  # if not atomic (0), try again                  \n" \
  59                                 : "=&r" (temp), "=m" (ref.count) \
  60                                 : "m" (ref.count) \
  61                                 : ); \
  62                         } \
  63                         void c::Release() \
  64                         { \
  65                                 unsigned long temp; \
  66                                 __asm__ __volatile__( \
  67                                 "               .set    mips3                           \n" \
  68                                 "1:             ll              %0, %1                          \n" \
  69                                 "               .set    mips0                           \n" \
  70                                 "               subu    %0, 1   # decrement     \n" \
  71                                 "               .set    mips3                           \n" \
  72                                 "               sc              %0, %1                          \n" \
  73                                 "               .set    mips0                           \n" \
  74                                 "               beqz    %0, 1b                          \n" \
  75                                 : "=&r" (temp), "=m" (ref.count) \
  76                                 : "m" (ref.count) \
  77                                 : ); \
  78                                 if (!ref) \
  79                                         delete this; \
  80                         }
  81         #elif defined(__ppc__)
  82                 #define DECLARE_REF(x)                  \
  83                         private: oRefCount ref;         \
  84                         public: void AddRef();          \
  85                                         void Release();
  86                 #define DEFINE_REF(c) \
  87                         void c::AddRef() \
  88                         { \
  89                                 int temp; \
  90                                 __asm__ __volatile__( \
  91                                 "1:             lwarx   %0, 0, %3       \n" \
  92                                 "               add             %0, %2, %0      \n" \
  93                                 "               dcbt    0, %3           # workaround for PPC405CR Errata\n" \
  94                                 "               stwcx.  %0, 0, %3       \n" \
  95                                 "               bne-    1b                      \n" \
  96                                 : "=&r" (temp), "=m" (ref.count) \
  97                                 : "r" (1), "r" (&ref.count), "m" (ref.count) \
  98                                 : "cc"); \
  99                         } \
 100                         void c::Release() \
 101                         { \
 102                                 int temp; \
 103                                 __asm__ __volatile__( \
 104                                 "1:             lwarx   %0, 0, %3       \n" \
 105                                 "               subf    %0, %2, %0      \n" \
 106                                 "               dcbt    0, %3           # workaround for PPC405CR Errata\n" \
 107                                 "               stwcx.  %0, 0, %3       \n" \
 108                                 "               bne-    1b                      \n" \
 109                                 : "=&r" (temp), "=m" (ref.count) \
 110                                 : "r" (1), "r" (&ref.count), "m" (ref.count) \
 111                                 : "cc"); \
 112                                 if (!ref) \
 113                                         delete this; \
 114                         }
 115         #else
 116                 #define DECLARE_REF(x)                  \
 117                         private:oRefCount ref;  \
 118                                         eSingleLock ref_lock; \
 119                         public: void AddRef();          \
 120                                         void Release();
 121                 #ifdef OBJECT_DEBUG
 122                         extern int object_total_remaining;
 123                         #define DEFINE_REF(c) \
 124                                 void c::AddRef() \
 125                                 { \
 126                                         eSingleLocker l(ref_lock); \
 127                                         ++object_total_remaining; \
 128                                         ++ref; \
 129                                         eDebug("OBJECT_DEBUG " #c "+%p now %d", this, ref.count); \
 130                                 } \
 131                                 void c::Release() \
 132                                 { \
 133                                         { \
 134                                                 eSingleLocker l(ref_lock); \
 135                                                 --object_total_remaining; \
 136                                                 --ref; \
 137                                                 eDebug("OBJECT_DEBUG " #c "-%p now %d", this, ref); \
 138                                         } \
 139                                         if (!ref) \
 140                                                 delete this; \
 141                                 }
 142                                 #error fix locking for debug
 143                 #else
 144                         #define DEFINE_REF(c) \
 145                                 void c::AddRef() \
 146                                 { \
 147                                         eSingleLocker l(ref_lock); \
 148                                         ++ref; \
 149                                 } \
 150                                 void c::Release() \
 151                                 { \
 152                                         { \
 153                                                 eSingleLocker l(ref_lock); \
 154                                                 --ref; \
 155                                         } \
 156                                         if (!ref) \
 157                                                 delete this; \
 158                                 }
 159                 #endif
 160         #endif
 161 #else
 162         #define DECLARE_REF(x) \
 163                 private: \
 164                         void AddRef(); \
 165                         void Release();
 166 #endif
 167
 168 #ifdef SWIG
 169 class Object
 170 {
 171 };
 172 #endif
 173
 174 #endif