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24 
25 #ifndef SHARE_VM_RUNTIME_MONITORCHUNK_HPP
26 #define SHARE_VM_RUNTIME_MONITORCHUNK_HPP
27 
28 #include "runtime/synchronizer.hpp"
29 
30 // Data structure for holding monitors for one activation during
31 // deoptimization.
32 
33 class MonitorChunk: public CHeapObj<mtSynchronizer> {
34  private:
35   int              _number_of_monitors;
36   BasicObjectLock* _monitors;
monitors() const37   BasicObjectLock* monitors() const { return _monitors; }
38   MonitorChunk*    _next;
39  public:
40   // Constructor
41   MonitorChunk(int number_on_monitors);
42   ~MonitorChunk();
43 
44   // link operations
next() const45   MonitorChunk* next() const                { return _next; }
set_next(MonitorChunk * next)46   void set_next(MonitorChunk* next)         { _next = next; }
47 
48   // Tells whether the monitor chunk is linked into the JavaThread
is_linked() const49   bool is_linked() const                    { return next() != NULL; }
50 
51   // Returns the number of monitors
number_of_monitors() const52   int number_of_monitors() const { return _number_of_monitors; }
53 
54   // Returns the index'th monitor
at(int index)55   BasicObjectLock* at(int index)            { assert(index >= 0 && index < number_of_monitors(), "out of bounds check"); return &monitors()[index]; }
56 
57 
58   // Memory management
59   void oops_do(OopClosure* f);
60 
61   // Tells whether the addr point into the monitors.
contains(void * addr) const62   bool contains(void* addr) const           { return (addr >= (void*) monitors()) && (addr <  (void*) (monitors() + number_of_monitors())); }
63 };
64 
65 #endif // SHARE_VM_RUNTIME_MONITORCHUNK_HPP
66