1 /*
   2  * Copyright (c) 2014, 2015, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #ifndef SHARE_VM_GC_PARALLEL_PSPROMOTIONLAB_INLINE_HPP
  26 #define SHARE_VM_GC_PARALLEL_PSPROMOTIONLAB_INLINE_HPP
  27 
  28 #include "gc/parallel/psPromotionLAB.hpp"
  29 #include "gc/shared/collectedHeap.inline.hpp"
  30 
  31 HeapWord* PSYoungPromotionLAB::allocate(size_t size) {
  32   // Can't assert this, when young fills, we keep the LAB around, but flushed.
  33   // assert(_state != flushed, "Sanity");
  34   HeapWord* obj = CollectedHeap::align_allocation_or_fail(top(), end(), SurvivorAlignmentInBytes);
  35   if (obj == NULL) {
  36     return NULL;
  37   }
  38 
  39   HeapWord* new_top = obj + size;
  40   // The 'new_top>obj' check is needed to detect overflow of obj+size.
  41   if (new_top > obj && new_top <= end()) {
  42     set_top(new_top);
  43     assert(is_aligned(obj, SurvivorAlignmentInBytes) && is_object_aligned(new_top),
  44            "checking alignment");
  45     return obj;
  46   } else {
  47     set_top(obj);
  48     return NULL;
  49   }
  50 }
  51 
  52 #endif // SHARE_VM_GC_PARALLEL_PSPROMOTIONLAB_INLINE_HPP
--- EOF ---