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ageTable.h

This is the verbatim text of the ageTable.h include file.

/* Sun-$Revision: 23.2 $ */

/* Copyright 1992-9 Sun Microsystems, Inc. and Stanford University.
   See the LICENSE file for license information. */

# pragma interface

// Age table for feedback-mediated tenuring (generation scavenging).

const int32 age_table_size = age_mask + 1;

struct ageTable: CHeapObj {
  // instance variables
  int32 sizes[age_table_size];
  
  // constructor
  ageTable();
  
  // operations
  void clear() { set_oops((oop*) &sizes[0], age_table_size, NULL); }
  void add(memOop p) {
    int32 age = p->mark()->age();
    assert(age >= 0 && age < age_table_size, "invalid age of object");
    sizes[age] += p->size(); }
  
  int32 tenure_size(fint age);
  fint tenuring_threshold(int32 size);
};

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