jdk8-mips64-public/hotspot: src/share/vm/gc_implementation/g1/heapRegion.inline.hpp@8a5ea0a9ccc4

7127708: G1: change task num types from int to uint in concurrent mark
Summary: Change the type of various task num fields, parameters etc to unsigned and rename them to be more consistent with the other collectors. Code changes were also reviewed by Vitaly Davidovich.
Reviewed-by: johnc
Contributed-by: Kaushik Srenevasan <kaushik@twitter.com>

     1 /*

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     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  */

    25 #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_HEAPREGION_INLINE_HPP

    26 #define SHARE_VM_GC_IMPLEMENTATION_G1_HEAPREGION_INLINE_HPP

    28 inline HeapWord* G1OffsetTableContigSpace::allocate(size_t size) {

    29   HeapWord* res = ContiguousSpace::allocate(size);

    30   if (res != NULL) {

    31     _offsets.alloc_block(res, size);

    32   }

    33   return res;

    34 }

    36 // Because of the requirement of keeping "_offsets" up to date with the

    37 // allocations, we sequentialize these with a lock.  Therefore, best if

    38 // this is used for larger LAB allocations only.

    39 inline HeapWord* G1OffsetTableContigSpace::par_allocate(size_t size) {

    40   MutexLocker x(&_par_alloc_lock);

    41   // Given that we take the lock no need to use par_allocate() here.

    42   HeapWord* res = ContiguousSpace::allocate(size);

    43   if (res != NULL) {

    44     _offsets.alloc_block(res, size);

    45   }

    46   return res;

    47 }

    49 inline HeapWord* G1OffsetTableContigSpace::block_start(const void* p) {

    50   return _offsets.block_start(p);

    51 }

    53 inline HeapWord*

    54 G1OffsetTableContigSpace::block_start_const(const void* p) const {

    55   return _offsets.block_start_const(p);

    56 }

    58 inline void HeapRegion::note_start_of_marking() {

    59   _next_marked_bytes = 0;

    60   _next_top_at_mark_start = top();

    61 }

    63 inline void HeapRegion::note_end_of_marking() {

    64   _prev_top_at_mark_start = _next_top_at_mark_start;

    65   _prev_marked_bytes = _next_marked_bytes;

    66   _next_marked_bytes = 0;

    68   assert(_prev_marked_bytes <=

    69          (size_t) pointer_delta(prev_top_at_mark_start(), bottom()) *

    70          HeapWordSize, "invariant");

    71 }

    73 inline void HeapRegion::note_start_of_copying(bool during_initial_mark) {

    74   if (is_survivor()) {

    75     // This is how we always allocate survivors.

    76     assert(_next_top_at_mark_start == bottom(), "invariant");

    77   } else {

    78     if (during_initial_mark) {

    79       // During initial-mark we'll explicitly mark any objects on old

    80       // regions that are pointed to by roots. Given that explicit

    81       // marks only make sense under NTAMS it'd be nice if we could

    82       // check that condition if we wanted to. Given that we don't

    83       // know where the top of this region will end up, we simply set

    84       // NTAMS to the end of the region so all marks will be below

    85       // NTAMS. We'll set it to the actual top when we retire this region.

    86       _next_top_at_mark_start = end();

    87     } else {

    88       // We could have re-used this old region as to-space over a

    89       // couple of GCs since the start of the concurrent marking

    90       // cycle. This means that [bottom,NTAMS) will contain objects

    91       // copied up to and including initial-mark and [NTAMS, top)

    92       // will contain objects copied during the concurrent marking cycle.

    93       assert(top() >= _next_top_at_mark_start, "invariant");

    94     }

    95   }

    96 }

    98 inline void HeapRegion::note_end_of_copying(bool during_initial_mark) {

    99   if (is_survivor()) {

   100     // This is how we always allocate survivors.

   101     assert(_next_top_at_mark_start == bottom(), "invariant");

   102   } else {

   103     if (during_initial_mark) {

   104       // See the comment for note_start_of_copying() for the details

   105       // on this.

   106       assert(_next_top_at_mark_start == end(), "pre-condition");

   107       _next_top_at_mark_start = top();

   108     } else {

   109       // See the comment for note_start_of_copying() for the details

   110       // on this.

   111       assert(top() >= _next_top_at_mark_start, "invariant");

   112     }

   113   }

   114 }

   116 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_HEAPREGION_INLINE_HPP

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

src/share/vm/gc_implementation/g1/heapRegion.inline.hpp@8a5ea0a9ccc4

src/share/vm/gc_implementation/g1/heapRegion.inline.hpp