23  */
  24 
  25 #ifndef SHARE_VM_GC_SHARED_GCID_HPP
  26 #define SHARE_VM_GC_SHARED_GCID_HPP
  27 
  28 #include "memory/allocation.hpp"
  29 
  30 class GCId : public AllStatic {
  31   friend class GCIdMark;
  32   friend class GCIdMarkAndRestore;
  33   static uint _next_id;
  34   static const uint UNDEFINED = (uint)-1;
  35   static const uint create();
  36 
  37  public:
  38   // Returns the currently active GC id. Asserts that there is an active GC id.
  39   static const uint current();
  40   // Same as current() but can return undefined() if no GC id is currently active
  41   static const uint current_raw();
  42   static const uint undefined() { return UNDEFINED; }

  43 };
  44 
  45 class GCIdMark : public StackObj {
  46   uint _gc_id;
  47  public:
  48   GCIdMark();
  49   GCIdMark(uint gc_id);
  50   ~GCIdMark();
  51 };
  52 
  53 class GCIdMarkAndRestore : public StackObj {
  54   uint _gc_id;
  55   uint _previous_gc_id;
  56  public:
  57   GCIdMarkAndRestore();
  58   GCIdMarkAndRestore(uint gc_id);
  59   ~GCIdMarkAndRestore();
  60 };
  61 
  62 #endif // SHARE_VM_GC_SHARED_GCID_HPP

  23  */
  24 
  25 #ifndef SHARE_VM_GC_SHARED_GCID_HPP
  26 #define SHARE_VM_GC_SHARED_GCID_HPP
  27 
  28 #include "memory/allocation.hpp"
  29 
  30 class GCId : public AllStatic {
  31   friend class GCIdMark;
  32   friend class GCIdMarkAndRestore;
  33   static uint _next_id;
  34   static const uint UNDEFINED = (uint)-1;
  35   static const uint create();
  36 
  37  public:
  38   // Returns the currently active GC id. Asserts that there is an active GC id.
  39   static const uint current();
  40   // Same as current() but can return undefined() if no GC id is currently active
  41   static const uint current_raw();
  42   static const uint undefined() { return UNDEFINED; }
  43   static size_t print_prefix(char* buf, size_t len);
  44 };
  45 
  46 class GCIdMark : public StackObj {
  47   uint _gc_id;
  48  public:
  49   GCIdMark();
  50   GCIdMark(uint gc_id);
  51   ~GCIdMark();
  52 };
  53 
  54 class GCIdMarkAndRestore : public StackObj {
  55   uint _gc_id;
  56   uint _previous_gc_id;
  57  public:
  58   GCIdMarkAndRestore();
  59   GCIdMarkAndRestore(uint gc_id);
  60   ~GCIdMarkAndRestore();
  61 };
  62 
  63 #endif // SHARE_VM_GC_SHARED_GCID_HPP