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#ifndef __base_object_h
#define __base_object_h
#include <assert.h>
#include <lib/base/smartptr.h>
#include <lib/base/elock.h>
//#define OBJECT_DEBUG
#include <lib/base/eerror.h>
typedef int RESULT;
class iObject
{
private:
/* we don't allow the default operator here, as it would break the refcount. */
void operator=(const iObject &);
protected:
void operator delete(void *p) { ::operator delete(p); }
virtual ~iObject() { }
#ifdef SWIG
virtual void AddRef()=0;
virtual void Release()=0;
#endif
public:
#ifndef SWIG
virtual void AddRef()=0;
virtual void Release()=0;
#endif
};
#ifndef SWIG
struct oRefCount
{
volatile int count;
oRefCount(): count(0) { }
operator volatile int&() { return count; }
~oRefCount()
{
#ifdef OBJECT_DEBUG
if (count)
eDebug("OBJECT_DEBUG FATAL: %p has %d references!", this, count);
else
eDebug("OBJECT_DEBUG refcount ok! (%p)", this);
#endif
}
};
#if defined(OBJECT_DEBUG)
extern int object_total_remaining;
#define DECLARE_REF(x) \
public: void AddRef(); \
void Release(); \
private:oRefCount ref; \
eSingleLock ref_lock;
#define DEFINE_REF(c) \
void c::AddRef() \
{ \
eSingleLocker l(ref_lock); \
++object_total_remaining; \
++ref; \
eDebug("OBJECT_DEBUG " #c "+%p now %d", this, (int)ref); \
} \
void c::Release() \
{ \
{ \
eSingleLocker l(ref_lock); \
--object_total_remaining; \
--ref; \
eDebug("OBJECT_DEBUG " #c "-%p now %d", this, (int)ref); \
} \
if (!ref) \
delete this; \
}
#elif defined(__mips__)
#define DECLARE_REF(x) \
public: void AddRef(); \
void Release(); \
private: oRefCount ref;
#define DEFINE_REF(c) \
void c::AddRef() \
{ \
unsigned long temp; \
__asm__ __volatile__( \
" .set mips3 \n" \
"1: ll %0, %1 # load counter \n" \
" .set mips0 \n" \
" addu %0, 1 # increment \n" \
" .set mips3 \n" \
" sc %0, %1 # try to store, checking for atomicity \n" \
" .set mips0 \n" \
" beqz %0, 1b # if not atomic (0), try again \n" \
: "=&r" (temp), "=m" (ref.count) \
: "m" (ref.count) \
: ); \
} \
void c::Release() \
{ \
unsigned long temp; \
__asm__ __volatile__( \
" .set mips3 \n" \
"1: ll %0, %1 \n" \
" .set mips0 \n" \
" subu %0, 1 # decrement \n" \
" .set mips3 \n" \
" sc %0, %1 \n" \
" .set mips0 \n" \
" beqz %0, 1b \n" \
: "=&r" (temp), "=m" (ref.count) \
: "m" (ref.count) \
: ); \
if (!ref) \
delete this; \
}
#elif defined(__ppc__) || defined(__powerpc__)
#define DECLARE_REF(x) \
public: void AddRef(); \
void Release(); \
private: oRefCount ref;
#define DEFINE_REF(c) \
void c::AddRef() \
{ \
int temp; \
__asm__ __volatile__( \
"1: lwarx %0, 0, %3 \n" \
" add %0, %2, %0 \n" \
" dcbt 0, %3 # workaround for PPC405CR Errata\n" \
" stwcx. %0, 0, %3 \n" \
" bne- 1b \n" \
: "=&r" (temp), "=m" (ref.count) \
: "r" (1), "r" (&ref.count), "m" (ref.count) \
: "cc"); \
} \
void c::Release() \
{ \
int temp; \
__asm__ __volatile__( \
"1: lwarx %0, 0, %3 \n" \
" subf %0, %2, %0 \n" \
" dcbt 0, %3 # workaround for PPC405CR Errata\n" \
" stwcx. %0, 0, %3 \n" \
" bne- 1b \n" \
: "=&r" (temp), "=m" (ref.count) \
: "r" (1), "r" (&ref.count), "m" (ref.count) \
: "cc"); \
if (!ref) \
delete this; \
}
#elif defined(__i386__) || defined(__x86_64__)
#define DECLARE_REF(x) \
public: void AddRef(); \
void Release(); \
private: oRefCount ref;
#define DEFINE_REF(c) \
void c::AddRef() \
{ \
__asm__ __volatile__( \
" lock ; incl %0 \n" \
: "=m" (ref.count) \
: "m" (ref.count)); \
} \
void c::Release() \
{ \
__asm__ __volatile__( \
" lock ; decl %0 \n" \
: "=m" (ref.count) \
: "m" (ref.count)); \
if (!ref) \
delete this; \
}
#else
#warning use non optimized implementation of refcounting.
#define DECLARE_REF(x) \
public: void AddRef(); \
void Release(); \
private:oRefCount ref; \
eSingleLock ref_lock;
#define DEFINE_REF(c) \
void c::AddRef() \
{ \
eSingleLocker l(ref_lock); \
++ref; \
} \
void c::Release() \
{ \
{ \
eSingleLocker l(ref_lock); \
--ref; \
} \
if (!ref) \
delete this; \
}
#endif
#else // SWIG
#define DECLARE_REF(x) \
private: \
void AddRef(); \
void Release();
#endif // SWIG
#endif // __base_object_h
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