Mercurial > jdk8-mips64-public > hotspot / file diff

     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/src/share/vm/gc_implementation/shared/liveRange.hpp	Sat Dec 01 00:00:00 2007 +0000
     1.3 @@ -0,0 +1,48 @@
     1.4 +/*
     1.5 + * Copyright 2001-2003 Sun Microsystems, Inc.  All Rights Reserved.
     1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
     1.7 + *
     1.8 + * This code is free software; you can redistribute it and/or modify it
     1.9 + * under the terms of the GNU General Public License version 2 only, as
    1.10 + * published by the Free Software Foundation.
    1.11 + *
    1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
    1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    1.14 + * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    1.15 + * version 2 for more details (a copy is included in the LICENSE file that
    1.16 + * accompanied this code).
    1.17 + *
    1.18 + * You should have received a copy of the GNU General Public License version
    1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
    1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
    1.21 + *
    1.22 + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
    1.23 + * CA 95054 USA or visit www.sun.com if you need additional information or
    1.24 + * have any questions.
    1.25 + *
    1.26 + */
    1.27 +
    1.28 +// This is a shared helper class used during phase 3 and 4 to move all the objects
    1.29 +// Dead regions in a Space are linked together to keep track of the live regions
    1.30 +// so that the live data can be traversed quickly without having to look at each
    1.31 +// object.
    1.32 +
    1.33 +class LiveRange: public MemRegion {
    1.34 +public:
    1.35 +  LiveRange(HeapWord* bottom, HeapWord* top): MemRegion(bottom, top) {}
    1.36 +
    1.37 +  void set_end(HeapWord* e) {
    1.38 +    assert(e >= start(), "should be a non-zero range");
    1.39 +    MemRegion::set_end(e);
    1.40 +  }
    1.41 +  void set_word_size(size_t ws) {
    1.42 +    assert(ws >= 0, "should be a non-zero range");
    1.43 +    MemRegion::set_word_size(ws);
    1.44 +  }
    1.45 +
    1.46 +  LiveRange * next() { return (LiveRange *) end(); }
    1.47 +
    1.48 +  void move_to(HeapWord* destination) {
    1.49 +    Copy::aligned_conjoint_words(start(), destination, word_size());
    1.50 +  }
    1.51 +};