Java example source code file (g1RemSet.inline.hpp)

This example Java source code file (g1RemSet.inline.hpp) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

assert, check_unhandled_oops, g1remset\:\:n_workers, g1remset\:\:par_write_ref, g1remset\:\:write_ref, heapregion, minobjalignmentinbytes, need, null, share_vm_gc_implementation_g1_g1remset_inline_hpp, updatersetimmediate\:\:do_oop_work, updatersoopclosure\:\:do_oop_work

The g1RemSet.inline.hpp Java example source code

/*
 * Copyright (c) 2001, 2012, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * 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).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 *
 */

#ifndef SHARE_VM_GC_IMPLEMENTATION_G1_G1REMSET_INLINE_HPP
#define SHARE_VM_GC_IMPLEMENTATION_G1_G1REMSET_INLINE_HPP

#include "gc_implementation/g1/g1RemSet.hpp"
#include "gc_implementation/g1/heapRegionRemSet.hpp"
#include "oops/oop.inline.hpp"

inline uint G1RemSet::n_workers() {
  if (_g1->workers() != NULL) {
    return _g1->workers()->total_workers();
  } else {
    return 1;
  }
}

template <class T>
inline void G1RemSet::write_ref(HeapRegion* from, T* p) {
  par_write_ref(from, p, 0);
}

template <class T>
inline void G1RemSet::par_write_ref(HeapRegion* from, T* p, int tid) {
  oop obj = oopDesc::load_decode_heap_oop(p);
#ifdef ASSERT
  // can't do because of races
  // assert(obj == NULL || obj->is_oop(), "expected an oop");

  // Do the safe subset of is_oop
  if (obj != NULL) {
#ifdef CHECK_UNHANDLED_OOPS
    oopDesc* o = obj.obj();
#else
    oopDesc* o = obj;
#endif // CHECK_UNHANDLED_OOPS
    assert((intptr_t)o % MinObjAlignmentInBytes == 0, "not oop aligned");
    assert(Universe::heap()->is_in_reserved(obj), "must be in heap");
  }
#endif // ASSERT

  assert(from == NULL || from->is_in_reserved(p), "p is not in from");

  HeapRegion* to = _g1->heap_region_containing(obj);
  if (to != NULL && from != to) {
    assert(to->rem_set() != NULL, "Need per-region 'into' remsets.");
    to->rem_set()->add_reference(p, tid);
  }
}

template <class T>
inline void UpdateRSOopClosure::do_oop_work(T* p) {
  assert(_from != NULL, "from region must be non-NULL");
  _rs->par_write_ref(_from, p, _worker_i);
}

template <class T>
inline void UpdateRSetImmediate::do_oop_work(T* p) {
  assert(_from->is_in_reserved(p), "paranoia");
  T heap_oop = oopDesc::load_heap_oop(p);
  if (!oopDesc::is_null(heap_oop) && !_from->is_survivor()) {
    _g1_rem_set->par_write_ref(_from, p, 0);
  }
}

#endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1REMSET_INLINE_HPP