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_G1_G1ALLOCATOR_HPP
26 #define SHARE_VM_GC_IMPLEMENTATION_G1_G1ALLOCATOR_HPP
27
28 #include "gc_implementation/g1/g1AllocationContext.hpp"
29 #include "gc_implementation/g1/g1AllocRegion.hpp"
30 #include "gc_implementation/shared/parGCAllocBuffer.hpp"
31
32 typedef int8_t in_cset_state_t;
33
34 // Helper class used to examine in_cset_t values.
35 class InCSetState : AllStatic {
36 public:
37 enum {
38 // Values <0 mean the region is a humongous region.
39 NotInCSet = 0, // The region is not in the collection set.
40 Young = 1, // The region is in the collection set and a young region.
41 Old = 2, // The region is in the collection set and an old region.
42 Num
43 };
44
45 static in_cset_state_t humongous() { return -1; }
46
47 static bool is_not_in_cset(in_cset_state_t state) { return state == NotInCSet; }
48 static bool is_in_cset_or_humongous(in_cset_state_t state) { return state != NotInCSet; }
49 static bool is_in_cset(in_cset_state_t state) { return state > NotInCSet; }
50 static bool is_humongous(in_cset_state_t state) { return state < NotInCSet; }
51 };
52
53 // Base class for G1 allocators.
54 class G1Allocator : public CHeapObj<mtGC> {
55 friend class VMStructs;
56 protected:
57 G1CollectedHeap* _g1h;
58
59 // Outside of GC pauses, the number of bytes used in all regions other
60 // than the current allocation region.
61 size_t _summary_bytes_used;
62
63 public:
64 G1Allocator(G1CollectedHeap* heap) :
65 _g1h(heap), _summary_bytes_used(0) { }
66
67 static G1Allocator* create_allocator(G1CollectedHeap* g1h);
68
69 virtual void init_mutator_alloc_region() = 0;
70 virtual void release_mutator_alloc_region() = 0;
71
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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_G1_G1ALLOCATOR_HPP
26 #define SHARE_VM_GC_IMPLEMENTATION_G1_G1ALLOCATOR_HPP
27
28 #include "gc_implementation/g1/g1AllocationContext.hpp"
29 #include "gc_implementation/g1/g1AllocRegion.hpp"
30 #include "gc_implementation/g1/g1InCSetState.hpp"
31 #include "gc_implementation/shared/parGCAllocBuffer.hpp"
32
33 // Base class for G1 allocators.
34 class G1Allocator : public CHeapObj<mtGC> {
35 friend class VMStructs;
36 protected:
37 G1CollectedHeap* _g1h;
38
39 // Outside of GC pauses, the number of bytes used in all regions other
40 // than the current allocation region.
41 size_t _summary_bytes_used;
42
43 public:
44 G1Allocator(G1CollectedHeap* heap) :
45 _g1h(heap), _summary_bytes_used(0) { }
46
47 static G1Allocator* create_allocator(G1CollectedHeap* g1h);
48
49 virtual void init_mutator_alloc_region() = 0;
50 virtual void release_mutator_alloc_region() = 0;
51
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