Tue, 07 Oct 2008 11:01:35 -0700
Merge
duke@435 | 1 | /* |
duke@435 | 2 | * Copyright 2003-2005 Sun Microsystems, Inc. All Rights Reserved. |
duke@435 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
duke@435 | 4 | * |
duke@435 | 5 | * This code is free software; you can redistribute it and/or modify it |
duke@435 | 6 | * under the terms of the GNU General Public License version 2 only, as |
duke@435 | 7 | * published by the Free Software Foundation. |
duke@435 | 8 | * |
duke@435 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
duke@435 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
duke@435 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
duke@435 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
duke@435 | 13 | * accompanied this code). |
duke@435 | 14 | * |
duke@435 | 15 | * You should have received a copy of the GNU General Public License version |
duke@435 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
duke@435 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
duke@435 | 18 | * |
duke@435 | 19 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
duke@435 | 20 | * CA 95054 USA or visit www.sun.com if you need additional information or |
duke@435 | 21 | * have any questions. |
duke@435 | 22 | * |
duke@435 | 23 | */ |
duke@435 | 24 | |
duke@435 | 25 | # include "incls/_precompiled.incl" |
duke@435 | 26 | # include "incls/_adjoiningVirtualSpaces.cpp.incl" |
duke@435 | 27 | |
duke@435 | 28 | AdjoiningVirtualSpaces::AdjoiningVirtualSpaces(ReservedSpace rs, |
duke@435 | 29 | size_t min_low_byte_size, |
duke@435 | 30 | size_t min_high_byte_size, |
duke@435 | 31 | size_t alignment) : |
duke@435 | 32 | _reserved_space(rs), _min_low_byte_size(min_low_byte_size), |
duke@435 | 33 | _min_high_byte_size(min_high_byte_size), _low(0), _high(0), |
duke@435 | 34 | _alignment(alignment) {} |
duke@435 | 35 | |
duke@435 | 36 | // The maximum byte sizes are for the initial layout of the |
duke@435 | 37 | // virtual spaces and are not the limit on the maximum bytes sizes. |
duke@435 | 38 | void AdjoiningVirtualSpaces::initialize(size_t max_low_byte_size, |
duke@435 | 39 | size_t init_low_byte_size, |
duke@435 | 40 | size_t init_high_byte_size) { |
duke@435 | 41 | |
duke@435 | 42 | // The reserved spaces for the two parts of the virtual space. |
duke@435 | 43 | ReservedSpace old_rs = _reserved_space.first_part(max_low_byte_size); |
duke@435 | 44 | ReservedSpace young_rs = _reserved_space.last_part(max_low_byte_size); |
duke@435 | 45 | |
duke@435 | 46 | _low = new PSVirtualSpace(old_rs, alignment()); |
duke@435 | 47 | if (!_low->expand_by(init_low_byte_size)) { |
duke@435 | 48 | vm_exit_during_initialization("Could not reserve enough space for " |
duke@435 | 49 | "object heap"); |
duke@435 | 50 | } |
duke@435 | 51 | |
duke@435 | 52 | _high = new PSVirtualSpaceHighToLow(young_rs, alignment()); |
duke@435 | 53 | if (!_high->expand_by(init_high_byte_size)) { |
duke@435 | 54 | vm_exit_during_initialization("Could not reserve enough space for " |
duke@435 | 55 | "object heap"); |
duke@435 | 56 | } |
duke@435 | 57 | } |
duke@435 | 58 | |
duke@435 | 59 | bool AdjoiningVirtualSpaces::adjust_boundary_up(size_t change_in_bytes) { |
duke@435 | 60 | assert(UseAdaptiveSizePolicy && UseAdaptiveGCBoundary, "runtime check"); |
duke@435 | 61 | size_t actual_change = low()->expand_into(high(), change_in_bytes); |
duke@435 | 62 | return actual_change != 0; |
duke@435 | 63 | } |
duke@435 | 64 | |
duke@435 | 65 | bool AdjoiningVirtualSpaces::adjust_boundary_down(size_t change_in_bytes) { |
duke@435 | 66 | assert(UseAdaptiveSizePolicy && UseAdaptiveGCBoundary, "runtime check"); |
duke@435 | 67 | size_t actual_change = high()->expand_into(low(), change_in_bytes); |
duke@435 | 68 | return actual_change != 0; |
duke@435 | 69 | } |