25 #ifndef SHARE_VM_RUNTIME_VIRTUALSPACE_HPP
26 #define SHARE_VM_RUNTIME_VIRTUALSPACE_HPP
27
28 #include "utilities/globalDefinitions.hpp"
29
30 // ReservedSpace is a data structure for reserving a contiguous address range.
31
32 class ReservedSpace {
33 friend class VMStructs;
34 protected:
35 char* _base;
36 char* _nvdimm_base;
37 char* _nvdimm_base_nv;
38 size_t _size;
39 size_t _dram_size;
40 size_t _nvdimm_size;
41 size_t _noaccess_prefix;
42 size_t _alignment;
43 bool _special;
44 int _fd_for_heap;
45 int _fd_for_nvdimm;
46 private:
47 bool _executable;
48
49 // ReservedSpace
50 ReservedSpace(char* base, size_t size, size_t alignment, bool special,
51 bool executable);
52 protected:
53 void initialize(size_t size, size_t alignment, bool large,
54 char* requested_address,
55 bool executable);
56
57 public:
58 // Constructor
59 ReservedSpace();
60 // Initialize the reserved space with the given size. If preferred_page_size
61 // is set, use this as minimum page size/alignment. This may waste some space
62 // if the given size is not aligned to that value, as the reservation will be
63 // aligned up to the final alignment in this case.
64 ReservedSpace(size_t size, size_t preferred_page_size = 0);
65 ReservedSpace(size_t size, size_t alignment, bool large,
66 char* requested_address = NULL);
67 ReservedSpace(size_t size, size_t alignment, bool large, bool executable);
68
69 // Accessors
70 char* base() const { return _base; }
71 char* nvdimm_base() const { return _nvdimm_base; }
72 int nvdimm_fd() const { return _fd_for_nvdimm; }
73 void setup_fd(int fd) {_fd_for_nvdimm = fd; }
74 size_t size() const { return _size; }
75 size_t nvdimm_size() const { return _nvdimm_size; }
76 char* end() const { return _base + _size; }
77 size_t alignment() const { return _alignment; }
78 bool special() const { return _special; }
79 bool executable() const { return _executable; }
80 size_t noaccess_prefix() const { return _noaccess_prefix; }
81 bool is_reserved() const { return _base != NULL; }
82 void release();
83
84 // Splitting
85 ReservedSpace first_part(size_t partition_size, size_t alignment,
86 bool split = false, bool realloc = true);
87 ReservedSpace last_part (size_t partition_size, size_t alignment);
88
89 // These simply call the above using the default alignment.
90 inline ReservedSpace first_part(size_t partition_size,
91 bool split = false, bool realloc = true);
92 inline ReservedSpace last_part (size_t partition_size);
93
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25 #ifndef SHARE_VM_RUNTIME_VIRTUALSPACE_HPP
26 #define SHARE_VM_RUNTIME_VIRTUALSPACE_HPP
27
28 #include "utilities/globalDefinitions.hpp"
29
30 // ReservedSpace is a data structure for reserving a contiguous address range.
31
32 class ReservedSpace {
33 friend class VMStructs;
34 protected:
35 char* _base;
36 char* _nvdimm_base;
37 char* _nvdimm_base_nv;
38 size_t _size;
39 size_t _dram_size;
40 size_t _nvdimm_size;
41 size_t _noaccess_prefix;
42 size_t _alignment;
43 bool _special;
44 int _fd_for_heap;
45 private:
46 bool _executable;
47
48 // ReservedSpace
49 ReservedSpace(char* base, size_t size, size_t alignment, bool special,
50 bool executable);
51 protected:
52 void initialize(size_t size, size_t alignment, bool large,
53 char* requested_address,
54 bool executable);
55
56 public:
57 // Constructor
58 ReservedSpace();
59 // Initialize the reserved space with the given size. If preferred_page_size
60 // is set, use this as minimum page size/alignment. This may waste some space
61 // if the given size is not aligned to that value, as the reservation will be
62 // aligned up to the final alignment in this case.
63 ReservedSpace(size_t size, size_t preferred_page_size = 0);
64 ReservedSpace(size_t size, size_t alignment, bool large,
65 char* requested_address = NULL);
66 ReservedSpace(size_t size, size_t alignment, bool large, bool executable);
67
68 // Accessors
69 char* base() const { return _base; }
70 char* nvdimm_base() const { return _nvdimm_base; }
71 int nvdimm_fd() const { return _fd_for_heap; }
72 void setup_fd(int fd) {_fd_for_heap = fd; }
73 size_t size() const { return _size; }
74 size_t nvdimm_size() const { return _nvdimm_size; }
75 char* end() const { return _base + _size; }
76 size_t alignment() const { return _alignment; }
77 bool special() const { return _special; }
78 bool executable() const { return _executable; }
79 size_t noaccess_prefix() const { return _noaccess_prefix; }
80 bool is_reserved() const { return _base != NULL; }
81 void release();
82
83 // Splitting
84 ReservedSpace first_part(size_t partition_size, size_t alignment,
85 bool split = false, bool realloc = true);
86 ReservedSpace last_part (size_t partition_size, size_t alignment);
87
88 // These simply call the above using the default alignment.
89 inline ReservedSpace first_part(size_t partition_size,
90 bool split = false, bool realloc = true);
91 inline ReservedSpace last_part (size_t partition_size);
92
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