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src/hotspot/share/memory/metaspace.hpp

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  49 //                       ||| block 1 |       |
  50 //                       ||----------        |
  51 //                       ||                  |
  52 //                       |-------------------|
  53 //                       |                   |
  54 //                       |                   |
  55 //                       +-------------------+
  56 //
  57 
  58 class ChunkManager;
  59 class ClassLoaderData;
  60 class Metablock;
  61 class Metachunk;
  62 class MetaspaceTracer;
  63 class MetaWord;
  64 class Mutex;
  65 class outputStream;
  66 class PrintCLDMetaspaceInfoClosure;
  67 class SpaceManager;
  68 class VirtualSpaceList;

  69 
  70 // Metaspaces each have a  SpaceManager and allocations
  71 // are done by the SpaceManager.  Allocations are done
  72 // out of the current Metachunk.  When the current Metachunk
  73 // is exhausted, the SpaceManager gets a new one from
  74 // the current VirtualSpace.  When the VirtualSpace is exhausted
  75 // the SpaceManager gets a new one.  The SpaceManager
  76 // also manages freelists of available Chunks.
  77 //
  78 // Currently the space manager maintains the list of
  79 // virtual spaces and the list of chunks in use.  Its
  80 // allocate() method returns a block for use as a
  81 // quantum of metadata.
  82 
  83 class Metaspace : public CHeapObj<mtClass> {
  84   friend class VMStructs;
  85   friend class SpaceManager;
  86   friend class VM_CollectForMetadataAllocation;
  87   friend class MetaspaceGC;
  88   friend class MetaspaceUtils;




  49 //                       ||| block 1 |       |
  50 //                       ||----------        |
  51 //                       ||                  |
  52 //                       |-------------------|
  53 //                       |                   |
  54 //                       |                   |
  55 //                       +-------------------+
  56 //
  57 
  58 class ChunkManager;
  59 class ClassLoaderData;
  60 class Metablock;
  61 class Metachunk;
  62 class MetaspaceTracer;
  63 class MetaWord;
  64 class Mutex;
  65 class outputStream;
  66 class PrintCLDMetaspaceInfoClosure;
  67 class SpaceManager;
  68 class VirtualSpaceList;
  69 class CollectedHeap;
  70 
  71 // Metaspaces each have a  SpaceManager and allocations
  72 // are done by the SpaceManager.  Allocations are done
  73 // out of the current Metachunk.  When the current Metachunk
  74 // is exhausted, the SpaceManager gets a new one from
  75 // the current VirtualSpace.  When the VirtualSpace is exhausted
  76 // the SpaceManager gets a new one.  The SpaceManager
  77 // also manages freelists of available Chunks.
  78 //
  79 // Currently the space manager maintains the list of
  80 // virtual spaces and the list of chunks in use.  Its
  81 // allocate() method returns a block for use as a
  82 // quantum of metadata.
  83 
  84 class Metaspace : public CHeapObj<mtClass> {
  85   friend class VMStructs;
  86   friend class SpaceManager;
  87   friend class VM_CollectForMetadataAllocation;
  88   friend class MetaspaceGC;
  89   friend class MetaspaceUtils;


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