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#ifndef __base_object_h
#define __base_object_h
#include <assert.h>
// #define OBJECT_DEBUG
#include <lib/base/smartptr.h>
#ifdef OBJECT_DEBUG
#include <lib/base/eerror.h>
#endif
#include <lib/base/elock.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:
virtual ~iObject() { }
public:
virtual void AddRef()=0;
virtual void Release()=0;
};
class oRefCount
{
int ref;
public:
oRefCount(): ref(0) { }
operator int&() { return ref; }
~oRefCount() {
#ifdef OBJECT_DEBUG
if (ref) eDebug("OBJECT_DEBUG FATAL: %p has %d references!", this, ref); else eDebug("OBJECT_DEBUG refcount ok! (%p)", this);
#endif
}
};
#ifndef SWIG
#if defined(__mips__)
#define DECLARE_REF(x) \
private: oRefCount ref; \
public: void AddRef(); \
void Release();
#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" \
" nop # branch-delay slot \n" \
: "=&r" (temp), "=m" ((int)ref) \
: "m" ((int)ref) \
: "memory"); \
} \
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" \
" nop \n" \
: "=&r" (temp), "=m" ((int)ref) \
: "m" ((int)ref) \
: "memory"); \
if (!ref) \
delete this; \
}
#elif defined(__ppc__)
#define DECLARE_REF(x) \
private: oRefCount ref; \
public: void AddRef(); \
void Release();
#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 \n" \
" stwcx. %0, 0, %3 \n" \
" bne- 1b \n" \
: "=&r" (temp), "=m" ((int)ref) \
: "r" (1), "r" (&((int)ref)), "m" ((int)ref) \
: "cc"); \
} \
void c::Release() \
{ \
int temp; \
__asm__ __volatile__( \
"1: lwarx %0, 0, %3 \n" \
" subf %0, %2, %0 \n" \
" dcbt 0, %3 \n" \
" stwcx. %0, 0, %3 \n" \
" bne- 1b \n" \
: "=&r" (temp), "=m" ((int)ref) \
: "r" (1), "r" (&((int)ref)), "m" ((int)ref) \
: "cc"); \
if (!ref) \
delete this; \
}
#else
#define DECLARE_REF(x) \
private:oRefCount ref; \
eSingleLock ref_lock; \
public: void AddRef(); \
void Release();
#ifdef OBJECT_DEBUG
extern int object_total_remaining;
#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, ref); \
} \
if (!ref) \
delete this; \
}
#error fix locking for debug
#else
#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
#endif
#else
#define DECLARE_REF(x) \
private: \
void AddRef(); \
void Release();
#endif
#ifdef SWIG
class Object
{
};
#endif
#endif
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