33   uintptr_t _end;
  34 
  35 public:
  36   ZVirtualMemory();
  37   ZVirtualMemory(uintptr_t start, size_t size);
  38 
  39   bool is_null() const;
  40   uintptr_t start() const;
  41   uintptr_t end() const;
  42   size_t size() const;
  43   ZVirtualMemory split(size_t size);
  44   void clear();
  45 };
  46 
  47 class ZVirtualMemoryManager VALUE_OBJ_CLASS_SPEC {
  48 private:
  49   ZMemoryManager _manager;
  50   bool           _initialized;
  51 
  52   bool reserve(uintptr_t start, size_t size);

  53 
  54 public:
  55   ZVirtualMemoryManager();
  56 
  57   bool is_initialized() const;
  58 
  59   ZVirtualMemory alloc(size_t size, bool alloc_from_front = false);
  60   void free(ZVirtualMemory vmem);
  61 };
  62 
  63 #endif // SHARE_GC_Z_ZVIRTUALMEMORY_HPP

  33   uintptr_t _end;
  34 
  35 public:
  36   ZVirtualMemory();
  37   ZVirtualMemory(uintptr_t start, size_t size);
  38 
  39   bool is_null() const;
  40   uintptr_t start() const;
  41   uintptr_t end() const;
  42   size_t size() const;
  43   ZVirtualMemory split(size_t size);
  44   void clear();
  45 };
  46 
  47 class ZVirtualMemoryManager VALUE_OBJ_CLASS_SPEC {
  48 private:
  49   ZMemoryManager _manager;
  50   bool           _initialized;
  51 
  52   bool reserve(uintptr_t start, size_t size);
  53   void nmt_reserve(uintptr_t start, size_t size);
  54 
  55 public:
  56   ZVirtualMemoryManager();
  57 
  58   bool is_initialized() const;
  59 
  60   ZVirtualMemory alloc(size_t size, bool alloc_from_front = false);
  61   void free(ZVirtualMemory vmem);
  62 };
  63 
  64 #endif // SHARE_GC_Z_ZVIRTUALMEMORY_HPP