1 /*

     2  * Copyright (c) 2014, 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_IMPLEMENTATION_PARALLELSCAVENGE_PSPROMOTIONLAB_INLINE_HPP

    26 #define SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PSPROMOTIONLAB_INLINE_HPP

    27 

    28 #include "gc_implementation/parallelScavenge/psPromotionLAB.hpp"

    29 #include "gc_interface/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_ptr_aligned(obj, SurvivorAlignmentInBytes) && is_object_aligned((intptr_t)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_IMPLEMENTATION_PARALLELSCAVENGE_PSPROMOTIONLAB_INLINE_HPP