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src/hotspot/share/gc/shenandoah/shenandoahForwarding.inline.hpp

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  22  *
  23  */
  24 
  25 #ifndef SHARE_GC_SHENANDOAH_SHENANDOAHFORWARDING_INLINE_HPP
  26 #define SHARE_GC_SHENANDOAH_SHENANDOAHFORWARDING_INLINE_HPP
  27 
  28 #include "gc/shenandoah/shenandoahAsserts.hpp"
  29 #include "gc/shenandoah/shenandoahForwarding.hpp"
  30 #include "oops/markWord.inline.hpp"
  31 
  32 inline HeapWord* ShenandoahForwarding::get_forwardee_raw(oop obj) {
  33   shenandoah_assert_in_heap(NULL, obj);
  34   return get_forwardee_raw_unchecked(obj);
  35 }
  36 
  37 inline HeapWord* ShenandoahForwarding::get_forwardee_raw_unchecked(oop obj) {
  38   markWord mark = obj->mark_raw();
  39   if (mark.is_marked()) {
  40     return (HeapWord*) mark.clear_lock_bits().to_pointer();
  41   } else {
  42     return cast_from_oop<HeapWord*>(obj);
  43   }
  44 }
  45 
  46 inline oop ShenandoahForwarding::get_forwardee(oop obj) {
  47   shenandoah_assert_correct(NULL, obj);
  48   return oop(get_forwardee_raw_unchecked(obj));
  49 }
  50 
  51 inline bool ShenandoahForwarding::is_forwarded(oop obj) {
  52   return obj->mark_raw().is_marked();
  53 }
  54 
  55 inline oop ShenandoahForwarding::try_update_forwardee(oop obj, oop update) {
  56   markWord old_mark = obj->mark_raw();
  57   if (old_mark.is_marked()) {
  58     return oop(old_mark.clear_lock_bits().to_pointer());
  59   }
  60 
  61   markWord new_mark = markWord::encode_pointer_as_mark(update);
  62   markWord prev_mark = obj->cas_set_mark_raw(new_mark, old_mark);


  22  *
  23  */
  24 
  25 #ifndef SHARE_GC_SHENANDOAH_SHENANDOAHFORWARDING_INLINE_HPP
  26 #define SHARE_GC_SHENANDOAH_SHENANDOAHFORWARDING_INLINE_HPP
  27 
  28 #include "gc/shenandoah/shenandoahAsserts.hpp"
  29 #include "gc/shenandoah/shenandoahForwarding.hpp"
  30 #include "oops/markWord.inline.hpp"
  31 
  32 inline HeapWord* ShenandoahForwarding::get_forwardee_raw(oop obj) {
  33   shenandoah_assert_in_heap(NULL, obj);
  34   return get_forwardee_raw_unchecked(obj);
  35 }
  36 
  37 inline HeapWord* ShenandoahForwarding::get_forwardee_raw_unchecked(oop obj) {
  38   markWord mark = obj->mark_raw();
  39   if (mark.is_marked()) {
  40     return (HeapWord*) mark.clear_lock_bits().to_pointer();
  41   } else {
  42     return (HeapWord*) obj;
  43   }
  44 }
  45 
  46 inline oop ShenandoahForwarding::get_forwardee(oop obj) {
  47   shenandoah_assert_correct(NULL, obj);
  48   return oop(get_forwardee_raw_unchecked(obj));
  49 }
  50 
  51 inline bool ShenandoahForwarding::is_forwarded(oop obj) {
  52   return obj->mark_raw().is_marked();
  53 }
  54 
  55 inline oop ShenandoahForwarding::try_update_forwardee(oop obj, oop update) {
  56   markWord old_mark = obj->mark_raw();
  57   if (old_mark.is_marked()) {
  58     return oop(old_mark.clear_lock_bits().to_pointer());
  59   }
  60 
  61   markWord new_mark = markWord::encode_pointer_as_mark(update);
  62   markWord prev_mark = obj->cas_set_mark_raw(new_mark, old_mark);
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