src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/gc/z/ZForwardingTableEntry.java
8204210: Implementation: JEP 333: ZGC: A Scalable Low-Latency Garbage Collector (Experimental)
Reviewed-by: pliden, stefank, eosterlund, ehelin, sjohanss, rbackman, coleenp, ihse, jgeorge, lmesnik, rkennke
Contributed-by: per.liden@oracle.com, stefan.karlsson@oracle.com, erik.osterlund@oracle.com, mikael.gerdin@oracle.com, kim.barrett@oracle.com, nils.eliasson@oracle.com, rickard.backman@oracle.com, rwestrel@redhat.com, coleen.phillimore@oracle.com, robbin.ehn@oracle.com, gerard.ziemski@oracle.com, hugh.wilkinson@intel.com, sandhya.viswanathan@intel.com, bill.npo.wheeler@intel.com, vinay.k.awasthi@intel.com, yasuenag@gmail.com
/*
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
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* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
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* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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package sun.jvm.hotspot.gc.z;
import sun.jvm.hotspot.debugger.Address;
class ZForwardingTableEntry {
private Address entry;
ZForwardingTableEntry(Address addr) {
entry = addr;
}
private static long empty() {
return ~0L;
}
boolean is_empty() {
return entry.asLongValue() == empty();
}
Address to_offset() {
return entry.andWithMask((1L << 42) - 1);
}
long from_index() {
return entry.asLongValue() >>> 42;
}
public String toString() {
return entry + " - from_index: " + from_index() + " to_offset: " + to_offset();
}
}