GPBase&
GPBase::assign (const GPBase &sptr)
{
gcsCounter.lock();
if (sptr.ptr)
{
sptr.ptr->count++;
}
if (ptr)
{
GPEnabled *old = ptr;
ptr = sptr.ptr;
if (! --old->count)
old->count = -1;
gcsCounter.unlock();
if (old->count < 0)
old->destroy();
}
else
{
ptr = sptr.ptr;
gcsCounter.unlock();
}
return *this;
}
GPBase&
GPBase::assign (GPEnabled *nptr)
{
gcsCounter.lock();
if (nptr)
{
if (nptr->count >= 0)
nptr->count++;
else
nptr = 0;
}
if (ptr)
{
GPEnabled *old = ptr;
ptr = nptr;
if (! --old->count)
old->count = -1;
gcsCounter.unlock();
if (old->count < 0)
old->destroy();
}
else
{
ptr = nptr;
gcsCounter.unlock();
}
return *this;
}
GPBase&
GPBase::assign (GPEnabled *nptr)
{
if (nptr && atomicIncrement(&nptr->count) <= 0)
nptr = 0;
GPEnabled *optr = (GPEnabled*)atomicExchangePointer((void**)&ptr, (void*)nptr);
if (optr)
optr->unref();
return *this;
}
GPBase&
GPBase::assign (GPEnabled *nptr)
{
if (nptr)
nptr->ref();
int volatile *locka = locks+LOCKIDX(this);
atomicAcquireOrSpin(locka);
GPEnabled *old = ptr;
ptr = nptr;
atomicRelease(locka);
if (old)
old->unref();
return *this;
}
