src/share/vm/gc_implementation/g1/g1PageBasedVirtualSpace.hpp

rev 7993 : imported patch per-comments

*** 47,58 ****
   private:
    // Reserved area addresses.
    char* _low_boundary;
    char* _high_boundary;
  
!   // The preferred commit/uncommit granularity in bytes.
!   size_t _commit_size;
  
    // Bitmap used for verification of commit/uncommit operations.
    BitMap _committed;
  
    // Bitmap used to keep track of which pages are dirty or not for _special
--- 47,58 ----
   private:
    // Reserved area addresses.
    char* _low_boundary;
    char* _high_boundary;
  
!   // The preferred page size used for commit/uncommit in bytes.
!   size_t _page_size;
  
    // Bitmap used for verification of commit/uncommit operations.
    BitMap _committed;
  
    // Bitmap used to keep track of which pages are dirty or not for _special
*** 66,109 ****
    bool _special;
  
    // Indicates whether the committed space should be executable.
    bool _executable;
  
!   // Commit the given memory range by using _commit_size pages as much as possible
!   // and the remainder with small sized pages. The start address must be _commit_size
    // aligned.
!   void commit_internal(char* start, char* end);
    // Uncommit the given memory range.
!   void uncommit_internal(char* start, char* end);
  
    // Returns the index of the page which contains the given address.
    uintptr_t  addr_to_page_index(char* addr) const;
    // Returns the address of the given page index.
!   char*  page_start(uintptr_t index);
!   // Returns the address of the end of the page given the page index ranging
!   // from 0..size_in_pages-2. For the last page, return _high_boundary.
!   char*  page_end(uintptr_t index);
  
    // Returns true if the entire area is backed by committed memory.
!   bool is_area_committed(uintptr_t start, size_t size_in_pages) const;
    // Returns true if the entire area is not backed by committed memory.
!   bool is_area_uncommitted(uintptr_t start, size_t size_in_pages) const;
  
   public:
  
    // Commit the given area of pages starting at start being size_in_pages large.
    // Returns true if the given area is zero filled upon completion.
!   bool commit(uintptr_t start, size_t size_in_pages);
  
    // Uncommit the given area of pages starting at start being size_in_pages large.
!   void uncommit(uintptr_t start, size_t size_in_pages);
  
!   // Initialization
!   G1PageBasedVirtualSpace();
!   // Initialize the given reserved space with the given base address and actual size.
!   // Prefer to commit in commit_size chunks.
!   bool initialize_with_granularity(ReservedSpace rs, size_t actual_size, size_t commit_size);
  
    // Destruction
    ~G1PageBasedVirtualSpace();
  
    // Amount of reserved memory.
--- 66,124 ----
    bool _special;
  
    // Indicates whether the committed space should be executable.
    bool _executable;
  
!   // Commit the given memory range by using _page_size pages as much as possible
!   // and the remainder with small sized pages. The start address must be _page_size
    // aligned.
!   void commit_internal(size_t start_page, size_t end_page);
!   // Commit num_pages full pages of _page_size size starting from start. All argument
!   // checking has been performed.
!   void commit_full_pages(size_t start_page, size_t end_page);
!   // Commit the tail area.
!   void commit_tail();
! 
    // Uncommit the given memory range.
!   void uncommit_internal(size_t start_page, size_t end_page);
! 
!   // Pretouch the given memory range.
!   void pretouch_internal(size_t start_page, size_t end_page);
  
    // Returns the index of the page which contains the given address.
    uintptr_t  addr_to_page_index(char* addr) const;
    // Returns the address of the given page index.
!   char*  page_start(size_t index);
! 
!   // Is the given page index the last page?
!   bool is_last_page(size_t index) { return index == (_committed.size() - 1); }
!   // Is the given page index the first after last page?
!   bool is_after_last_page(size_t index);
!   // Is the last page only partially covered by this space?
!   bool is_last_page_partial() { return !is_ptr_aligned(_high_boundary, _page_size); }
!   // Returns the end address of the given page bounded by the reserved space.
!   char* bounded_end_addr(size_t end_page);
   
    // Returns true if the entire area is backed by committed memory.
!   bool is_area_committed(size_t start, size_t size_in_pages) const;
    // Returns true if the entire area is not backed by committed memory.
!   bool is_area_uncommitted(size_t start, size_t size_in_pages) const;
  
+   void initialize_with_page_size(ReservedSpace rs, size_t used_size, size_t page_size);
   public:
  
    // Commit the given area of pages starting at start being size_in_pages large.
    // Returns true if the given area is zero filled upon completion.
!   bool commit(size_t start, size_t size_in_pages);
  
    // Uncommit the given area of pages starting at start being size_in_pages large.
!   void uncommit(size_t start, size_t size_in_pages);
  
!   // Initialize the given reserved space with the given base address and the size
!   // actually used.
!   // Prefer to commit in page_size chunks.
!   G1PageBasedVirtualSpace(ReservedSpace rs, size_t used_size, size_t page_size);
  
    // Destruction
    ~G1PageBasedVirtualSpace();
  
    // Amount of reserved memory.