src/hotspot/share/gc/g1/g1HeapRegionAttr.hpp

rev 55028 : imported patch 8223693-per-region-type-memory-wastage

*** 52,69 ****
    // The most common check for a given reference is whether the region is in the
    // collection set or not, and which generation this region is in.
    // The selected encoding allows us to use a single check (> NotInCSet) for the
    // former.
    //
!   // The other values are used for objects requiring various special cases,
!   // for example eager reclamation of humongous objects or optional regions.
!   static const region_type_t Optional     =  -2;    // The region is optional and NOT in the current collection set.
!   static const region_type_t Humongous    =  -1;    // The region is a humongous candidate not in the current collection set.
!   static const region_type_t NotInCSet    =   0;    // The region is not in the collection set.
!   static const region_type_t Young        =   1;    // The region is in the collection set and a young region.
!   static const region_type_t Old          =   2;    // The region is in the collection set and an old region.
!   static const region_type_t Num          =   3;
  
    G1HeapRegionAttr(region_type_t type = NotInCSet, bool needs_remset_update = false) :
      _needs_remset_update(needs_remset_update), _type(type) {
  
      assert(is_valid(), "Invalid type %d", _type);
--- 52,69 ----
    // The most common check for a given reference is whether the region is in the
    // collection set or not, and which generation this region is in.
    // The selected encoding allows us to use a single check (> NotInCSet) for the
    // former.
    //
!   // The other values are used for objects in regions requiring various special handling,
!   // eager reclamation of humongous objects or optional regions.
!   static const region_type_t Optional     =  -3;    // The region is optional not in the current collection set.
!   static const region_type_t Humongous    =  -2;    // The region is a humongous candidate not in the current collection set.
!   static const region_type_t NotInCSet    =  -1;    // The region is not in the collection set.
!   static const region_type_t Young        =   0;    // The region is in the collection set and a young region.
!   static const region_type_t Old          =   1;    // The region is in the collection set and an old region.
!   static const region_type_t Num          =   2;
  
    G1HeapRegionAttr(region_type_t type = NotInCSet, bool needs_remset_update = false) :
      _needs_remset_update(needs_remset_update), _type(type) {
  
      assert(is_valid(), "Invalid type %d", _type);
*** 90,100 ****
      _type = NotInCSet;
    }
    void set_has_remset(bool value)      { _needs_remset_update = value ? 1 : 0; }
  
    bool is_in_cset_or_humongous() const { return is_in_cset() || is_humongous(); }
!   bool is_in_cset() const              { return type() > NotInCSet; }
  
    bool is_humongous() const            { return type() == Humongous; }
    bool is_young() const                { return type() == Young; }
    bool is_old() const                  { return type() == Old; }
    bool is_optional() const             { return type() == Optional; }
--- 90,100 ----
      _type = NotInCSet;
    }
    void set_has_remset(bool value)      { _needs_remset_update = value ? 1 : 0; }
  
    bool is_in_cset_or_humongous() const { return is_in_cset() || is_humongous(); }
!   bool is_in_cset() const              { return type() >= Young; }
  
    bool is_humongous() const            { return type() == Humongous; }
    bool is_young() const                { return type() == Young; }
    bool is_old() const                  { return type() == Old; }
    bool is_optional() const             { return type() == Optional; }