Wed, 26 Jun 2013 16:58:37 +0200
8013590: NPG: Add a memory pool MXBean for Metaspace
Reviewed-by: jmasa, mgerdin
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25 #ifndef SHARE_VM_MEMORY_SPACE_INLINE_HPP
26 #define SHARE_VM_MEMORY_SPACE_INLINE_HPP
28 #include "gc_interface/collectedHeap.hpp"
29 #include "memory/space.hpp"
30 #include "memory/universe.hpp"
31 #include "runtime/safepoint.hpp"
33 inline HeapWord* Space::block_start(const void* p) {
34 return block_start_const(p);
35 }
37 inline HeapWord* OffsetTableContigSpace::allocate(size_t size) {
38 HeapWord* res = ContiguousSpace::allocate(size);
39 if (res != NULL) {
40 _offsets.alloc_block(res, size);
41 }
42 return res;
43 }
45 // Because of the requirement of keeping "_offsets" up to date with the
46 // allocations, we sequentialize these with a lock. Therefore, best if
47 // this is used for larger LAB allocations only.
48 inline HeapWord* OffsetTableContigSpace::par_allocate(size_t size) {
49 MutexLocker x(&_par_alloc_lock);
50 // This ought to be just "allocate", because of the lock above, but that
51 // ContiguousSpace::allocate asserts that either the allocating thread
52 // holds the heap lock or it is the VM thread and we're at a safepoint.
53 // The best I (dld) could figure was to put a field in ContiguousSpace
54 // meaning "locking at safepoint taken care of", and set/reset that
55 // here. But this will do for now, especially in light of the comment
56 // above. Perhaps in the future some lock-free manner of keeping the
57 // coordination.
58 HeapWord* res = ContiguousSpace::par_allocate(size);
59 if (res != NULL) {
60 _offsets.alloc_block(res, size);
61 }
62 return res;
63 }
65 inline HeapWord*
66 OffsetTableContigSpace::block_start_const(const void* p) const {
67 return _offsets.block_start(p);
68 }
70 #endif // SHARE_VM_MEMORY_SPACE_INLINE_HPP