45 static int displaced_header_offset_in_bytes() { return offset_of(BasicLock, _displaced_header); } 46 }; 47 48 // A BasicObjectLock associates a specific Java object with a BasicLock. 49 // It is currently embedded in an interpreter frame. 50 51 // Because some machines have alignment restrictions on the control stack, 52 // the actual space allocated by the interpreter may include padding words 53 // after the end of the BasicObjectLock. Also, in order to guarantee 54 // alignment of the embedded BasicLock objects on such machines, we 55 // put the embedded BasicLock at the beginning of the struct. 56 57 class BasicObjectLock VALUE_OBJ_CLASS_SPEC { 58 friend class VMStructs; 59 private: 60 BasicLock _lock; // the lock, must be double word aligned 61 oop _obj; // object holds the lock; 62 63 public: 64 // Manipulation 65 oop obj() const { return _obj; } 66 void set_obj(oop obj) { _obj = obj; } 67 BasicLock* lock() { return &_lock; } 68 69 // Note: Use frame::interpreter_frame_monitor_size() for the size of BasicObjectLocks 70 // in interpreter activation frames since it includes machine-specific padding. 71 static int size() { return sizeof(BasicObjectLock)/wordSize; } 72 73 // GC support 74 void oops_do(OopClosure* f) { f->do_oop(&_obj); } 75 76 static int obj_offset_in_bytes() { return offset_of(BasicObjectLock, _obj); } 77 static int lock_offset_in_bytes() { return offset_of(BasicObjectLock, _lock); } 78 }; 79 80 81 #endif // SHARE_VM_RUNTIME_BASICLOCK_HPP | 45 static int displaced_header_offset_in_bytes() { return offset_of(BasicLock, _displaced_header); } 46 }; 47 48 // A BasicObjectLock associates a specific Java object with a BasicLock. 49 // It is currently embedded in an interpreter frame. 50 51 // Because some machines have alignment restrictions on the control stack, 52 // the actual space allocated by the interpreter may include padding words 53 // after the end of the BasicObjectLock. Also, in order to guarantee 54 // alignment of the embedded BasicLock objects on such machines, we 55 // put the embedded BasicLock at the beginning of the struct. 56 57 class BasicObjectLock VALUE_OBJ_CLASS_SPEC { 58 friend class VMStructs; 59 private: 60 BasicLock _lock; // the lock, must be double word aligned 61 oop _obj; // object holds the lock; 62 63 public: 64 // Manipulation 65 oop obj() const { 66 return _obj; 67 } 68 void set_obj(oop obj) { 69 _obj = obj; 70 } 71 BasicLock* lock() { return &_lock; } 72 73 // Note: Use frame::interpreter_frame_monitor_size() for the size of BasicObjectLocks 74 // in interpreter activation frames since it includes machine-specific padding. 75 static int size() { return sizeof(BasicObjectLock)/wordSize; } 76 77 // GC support 78 void oops_do(OopClosure* f) { f->do_oop(&_obj); } 79 80 static int obj_offset_in_bytes() { return offset_of(BasicObjectLock, _obj); } 81 static int lock_offset_in_bytes() { return offset_of(BasicObjectLock, _lock); } 82 }; 83 84 85 #endif // SHARE_VM_RUNTIME_BASICLOCK_HPP |