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comparison src/share/vm/memory/metachunk.cpp @ 11015:7ee0d5c53c78

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Merge
author chegar
date Wed, 08 May 2013 15:25:08 +0100
parents c23dbf0e8ab7
children bdfbb1fb19ca
comparison
equal deleted inserted replaced
11014:4b52137b07c9 11015:7ee0d5c53c78
26 #include "memory/allocation.hpp" 26 #include "memory/allocation.hpp"
27 #include "memory/metachunk.hpp" 27 #include "memory/metachunk.hpp"
28 #include "utilities/copy.hpp" 28 #include "utilities/copy.hpp"
29 #include "utilities/debug.hpp" 29 #include "utilities/debug.hpp"
30 30
31 class VirtualSpaceNode;
31 // 32 //
32 // Future modification 33 // Future modification
33 // 34 //
34 // The Metachunk can conceivable be replaced by the Chunk in 35 // The Metachunk can conceivable be replaced by the Chunk in
35 // allocation.hpp. Note that the latter Chunk is the space for 36 // allocation.hpp. Note that the latter Chunk is the space for
43 size_t Metachunk::_overhead = 44 size_t Metachunk::_overhead =
44 Chunk::aligned_overhead_size(sizeof(Metachunk)) / BytesPerWord; 45 Chunk::aligned_overhead_size(sizeof(Metachunk)) / BytesPerWord;
45 46
46 // Metachunk methods 47 // Metachunk methods
47 48
48 Metachunk* Metachunk::initialize(MetaWord* ptr, size_t word_size) { 49 Metachunk::Metachunk(size_t word_size,
49 // Set bottom, top, and end. Allow space for the Metachunk itself 50 VirtualSpaceNode* container) :
50 Metachunk* chunk = (Metachunk*) ptr; 51 _word_size(word_size),
51 52 _bottom(NULL),
52 MetaWord* chunk_bottom = ptr + _overhead; 53 _end(NULL),
53 chunk->set_bottom(ptr); 54 _top(NULL),
54 chunk->set_top(chunk_bottom); 55 _next(NULL),
55 MetaWord* chunk_end = ptr + word_size; 56 _prev(NULL),
56 assert(chunk_end > chunk_bottom, "Chunk must be too small"); 57 _container(container)
57 chunk->set_end(chunk_end); 58 {
58 chunk->set_next(NULL); 59 _bottom = (MetaWord*)this;
59 chunk->set_prev(NULL); 60 _top = (MetaWord*)this + _overhead;
60 chunk->set_word_size(word_size); 61 _end = (MetaWord*)this + word_size;
61 #ifdef ASSERT 62 #ifdef ASSERT
62 size_t data_word_size = pointer_delta(chunk_end, chunk_bottom, sizeof(MetaWord)); 63 set_is_free(false);
63 Copy::fill_to_words((HeapWord*) chunk_bottom, data_word_size, metadata_chunk_initialize); 64 size_t data_word_size = pointer_delta(end(),
65 top(),
66 sizeof(MetaWord));
67 Copy::fill_to_words((HeapWord*) top(),
68 data_word_size,
69 metadata_chunk_initialize);
64 #endif 70 #endif
65 return chunk;
66 } 71 }
67
68 72
69 MetaWord* Metachunk::allocate(size_t word_size) { 73 MetaWord* Metachunk::allocate(size_t word_size) {
70 MetaWord* result = NULL; 74 MetaWord* result = NULL;
71 // If available, bump the pointer to allocate. 75 // If available, bump the pointer to allocate.
72 if (free_word_size() >= word_size) { 76 if (free_word_size() >= word_size) {