void HeapMultiname::setMultiname(const Multiname& that)
{
MMgc::GC* gc = this->gc();
const void *container = gc->FindBeginningFast(this);
WBRC(gc, container, &name.name, that.name);
bool const this_nsset = name.isNsset() != 0;
bool const that_nsset = that.isNsset() != 0;
if (this_nsset != that_nsset)
{
// gc->rc or vice versa... we have to explicitly null out
// any existing value (before setting a new one) because WB/WBRC
// assume any existing value is a GCObject/RCObject respectively.
if (this_nsset)
WB_NULL(&name.ns);
else
WBRC_NULL(&name.ns);
}
if (that_nsset)
{
WB(gc, container, &name.nsset, that.nsset);
}
else
{
WBRC(gc, container, &name.ns, that.ns);
}
name.flags = that.flags;
name.next_index = that.next_index;
}
void ST_mmgc_basics::test8() {
MMGC_GCENTER(gc);
MyGCObject *mygcobject;
mygcobject = (MyGCObject *)new (gc) MyGCObject();
verifyPass((MyGCObject *)gc->FindBeginningGuarded(mygcobject)==mygcobject, "(MyGCObject *)gc->FindBeginningGuarded(mygcobject)==mygcobject", __FILE__, __LINE__);
verifyPass((MyGCObject *)gc->FindBeginningFast(mygcobject)==mygcobject, "(MyGCObject *)gc->FindBeginningFast(mygcobject)==mygcobject", __FILE__, __LINE__);
}
// NOTE NOTE NOTE
// Write barrier note: the container for a HeapMultiname is *not* 'this';
// HeapMultiname figures as a field in eg QNameObject and XMLListObject.
// You *must* call FindBeginningFast(this) to get the right container.
//
// NOTE NOTE NOTE
// This version is only safe if 'this' is on the first block of the object - because
// GC::GetGC() is not reliable otherwise. See bugzilla 525875. Use the more
// reliable version below if in doubt.
void HeapMultiname::setMultiname(const Multiname& that)
{
MMgc::GC* gc = this->gc();
const void *container = gc->FindBeginningFast(this);
setMultiname(gc, container, that);
}