/**
* Takes the passed address and (atomically) performs any read barrier actions before returning it
* as an object.
*
* @param tmp The non-zero referent address
* @return The referent object.
*/
@Uninterruptible
@Inline
Object getInternal() {
if (RVMType.JavaLangRefReferenceReferenceField.madeTraced()) {
if (NEEDS_OBJECT_GETFIELD_BARRIER) {
return Barriers.objectFieldRead(
this,
RVMType.JavaLangRefReferenceReferenceField.getOffset(),
RVMType.JavaLangRefReferenceReferenceField.getId());
} else {
return Magic.getObjectAtOffset(
this,
RVMType.JavaLangRefReferenceReferenceField.getOffset(),
RVMType.JavaLangRefReferenceReferenceField.getId());
}
} else {
Address tmp = _referent;
if (tmp.isZero()) {
return null;
} else {
Object ref = Magic.addressAsObject(tmp);
if (Barriers.NEEDS_JAVA_LANG_REFERENCE_READ_BARRIER) {
ref = Barriers.javaLangReferenceReadBarrier(ref);
}
return ref;
}
}
}
public void clear() {
if (RVMType.JavaLangRefReferenceReferenceField.madeTraced()) {
if (NEEDS_OBJECT_GETFIELD_BARRIER) {
Barriers.objectFieldWrite(
this,
null,
RVMType.JavaLangRefReferenceReferenceField.getOffset(),
RVMType.JavaLangRefReferenceReferenceField.getId());
} else {
Magic.setObjectAtOffset(
this,
RVMType.JavaLangRefReferenceReferenceField.getOffset(),
null,
RVMType.JavaLangRefReferenceReferenceField.getId());
}
}
}
