src/hotspot/share/gc/shared/threadLocalAllocBuffer.hpp

rev 49665 : 8201326: Renaming ThreadLocalAllocationBuffer end to current_end
Summary: Rename the TLAB end field to a better name
Contributed-by: jcbeyler@google.com
rev 49666 : [mq]: renaming2
rev 49667 : [mq]: rename3

*** 42,52 ****
    friend class JVMCIVMStructs;
  private:
    HeapWord* _start;                              // address of TLAB
    HeapWord* _top;                                // address after last allocation
    HeapWord* _pf_top;                             // allocation prefetch watermark
!   HeapWord* _end;                                // allocation end (excluding alignment_reserve)
    size_t    _desired_size;                       // desired size   (including alignment_reserve)
    size_t    _refill_waste_limit;                 // hold onto tlab if free() is larger than this
    size_t    _allocated_before_last_gc;           // total bytes allocated up until the last gc
  
    static size_t   _max_size;                          // maximum size of any TLAB
--- 42,52 ----
    friend class JVMCIVMStructs;
  private:
    HeapWord* _start;                              // address of TLAB
    HeapWord* _top;                                // address after last allocation
    HeapWord* _pf_top;                             // allocation prefetch watermark
!   HeapWord* _fast_path_end;                      // allocation end (excluding alignment_reserve)
    size_t    _desired_size;                       // desired size   (including alignment_reserve)
    size_t    _refill_waste_limit;                 // hold onto tlab if free() is larger than this
    size_t    _allocated_before_last_gc;           // total bytes allocated up until the last gc
  
    static size_t   _max_size;                          // maximum size of any TLAB
*** 63,92 ****
  
    void accumulate_statistics();
    void initialize_statistics();
  
    void set_start(HeapWord* start)                { _start = start; }
!   void set_end(HeapWord* end)                    { _end = end; }
    void set_top(HeapWord* top)                    { _top = top; }
    void set_pf_top(HeapWord* pf_top)              { _pf_top = pf_top; }
    void set_desired_size(size_t desired_size)     { _desired_size = desired_size; }
    void set_refill_waste_limit(size_t waste)      { _refill_waste_limit = waste;  }
  
    size_t initial_refill_waste_limit()            { return desired_size() / TLABRefillWasteFraction; }
  
    static int    target_refills()                 { return _target_refills; }
    size_t initial_desired_size();
  
!   size_t remaining() const                       { return end() == NULL ? 0 : pointer_delta(hard_end(), top()); }
  
    // Make parsable and release it.
    void reset();
  
    // Resize based on amount of allocation, etc.
    void resize();
  
!   void invariants() const { assert(top() >= start() && top() <= end(), "invalid tlab"); }
  
    void initialize(HeapWord* start, HeapWord* top, HeapWord* end);
  
    void print_stats(const char* tag);
  
--- 63,92 ----
  
    void accumulate_statistics();
    void initialize_statistics();
  
    void set_start(HeapWord* start)                { _start = start; }
!   void set_fast_path_end(HeapWord* fast_path_end){ _fast_path_end = fast_path_end; }
    void set_top(HeapWord* top)                    { _top = top; }
    void set_pf_top(HeapWord* pf_top)              { _pf_top = pf_top; }
    void set_desired_size(size_t desired_size)     { _desired_size = desired_size; }
    void set_refill_waste_limit(size_t waste)      { _refill_waste_limit = waste;  }
  
    size_t initial_refill_waste_limit()            { return desired_size() / TLABRefillWasteFraction; }
  
    static int    target_refills()                 { return _target_refills; }
    size_t initial_desired_size();
  
!   size_t remaining() const                       { return fast_path_end() == NULL ? 0 : pointer_delta(hard_end(), top()); }
  
    // Make parsable and release it.
    void reset();
  
    // Resize based on amount of allocation, etc.
    void resize();
  
!   void invariants() const { assert(top() >= start() && top() <= fast_path_end(), "invalid tlab"); }
  
    void initialize(HeapWord* start, HeapWord* top, HeapWord* end);
  
    void print_stats(const char* tag);
  
*** 112,129 ****
    static size_t max_size()                       { assert(_max_size != 0, "max_size not set up"); return _max_size; }
    static size_t max_size_in_bytes()              { return max_size() * BytesPerWord; }
    static void set_max_size(size_t max_size)      { _max_size = max_size; }
  
    HeapWord* start() const                        { return _start; }
!   HeapWord* end() const                          { return _end; }
!   HeapWord* hard_end() const                     { return _end + alignment_reserve(); }
    HeapWord* top() const                          { return _top; }
    HeapWord* pf_top() const                       { return _pf_top; }
    size_t desired_size() const                    { return _desired_size; }
    size_t used() const                            { return pointer_delta(top(), start()); }
    size_t used_bytes() const                      { return pointer_delta(top(), start(), 1); }
!   size_t free() const                            { return pointer_delta(end(), top()); }
    // Don't discard tlab if remaining space is larger than this.
    size_t refill_waste_limit() const              { return _refill_waste_limit; }
  
    // Allocate size HeapWords. The memory is NOT initialized to zero.
    inline HeapWord* allocate(size_t size);
--- 112,129 ----
    static size_t max_size()                       { assert(_max_size != 0, "max_size not set up"); return _max_size; }
    static size_t max_size_in_bytes()              { return max_size() * BytesPerWord; }
    static void set_max_size(size_t max_size)      { _max_size = max_size; }
  
    HeapWord* start() const                        { return _start; }
!   HeapWord* fast_path_end() const                { return _fast_path_end; }
!   HeapWord* hard_end() const                     { return _fast_path_end + alignment_reserve(); }
    HeapWord* top() const                          { return _top; }
    HeapWord* pf_top() const                       { return _pf_top; }
    size_t desired_size() const                    { return _desired_size; }
    size_t used() const                            { return pointer_delta(top(), start()); }
    size_t used_bytes() const                      { return pointer_delta(top(), start(), 1); }
!   size_t free() const                            { return pointer_delta(fast_path_end(), top()); }
    // Don't discard tlab if remaining space is larger than this.
    size_t refill_waste_limit() const              { return _refill_waste_limit; }
  
    // Allocate size HeapWords. The memory is NOT initialized to zero.
    inline HeapWord* allocate(size_t size);
*** 164,174 ****
  
    static size_t refill_waste_limit_increment()   { return TLABWasteIncrement; }
  
    // Code generation support
    static ByteSize start_offset()                 { return byte_offset_of(ThreadLocalAllocBuffer, _start); }
!   static ByteSize end_offset()                   { return byte_offset_of(ThreadLocalAllocBuffer, _end  ); }
    static ByteSize top_offset()                   { return byte_offset_of(ThreadLocalAllocBuffer, _top  ); }
    static ByteSize pf_top_offset()                { return byte_offset_of(ThreadLocalAllocBuffer, _pf_top  ); }
    static ByteSize size_offset()                  { return byte_offset_of(ThreadLocalAllocBuffer, _desired_size ); }
    static ByteSize refill_waste_limit_offset()    { return byte_offset_of(ThreadLocalAllocBuffer, _refill_waste_limit ); }
  
--- 164,174 ----
  
    static size_t refill_waste_limit_increment()   { return TLABWasteIncrement; }
  
    // Code generation support
    static ByteSize start_offset()                 { return byte_offset_of(ThreadLocalAllocBuffer, _start); }
!   static ByteSize fast_path_end_offset()         { return byte_offset_of(ThreadLocalAllocBuffer, _fast_path_end); }
    static ByteSize top_offset()                   { return byte_offset_of(ThreadLocalAllocBuffer, _top  ); }
    static ByteSize pf_top_offset()                { return byte_offset_of(ThreadLocalAllocBuffer, _pf_top  ); }
    static ByteSize size_offset()                  { return byte_offset_of(ThreadLocalAllocBuffer, _desired_size ); }
    static ByteSize refill_waste_limit_offset()    { return byte_offset_of(ThreadLocalAllocBuffer, _refill_waste_limit ); }