17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #ifndef SHARE_GC_SHENANDOAH_SHENANDOAHFORWARDING_HPP
  26 #define SHARE_GC_SHENANDOAH_SHENANDOAHFORWARDING_HPP
  27 
  28 #include "oops/oop.hpp"
  29 #include "utilities/globalDefinitions.hpp"
  30 
  31 class ShenandoahForwarding {
  32 public:
  33   /* Gets forwardee from the given object.
  34    */
  35   static inline oop get_forwardee(oop obj);
  36 




  37   /* Returns the raw value from forwardee slot.
  38    */
  39   static inline HeapWord* get_forwardee_raw(oop obj);
  40 
  41   /* Returns the raw value from forwardee slot without any checks.
  42    * Used for quick verification.
  43    */
  44   static inline HeapWord* get_forwardee_raw_unchecked(oop obj);
  45 
  46   /**
  47    * Returns true if the object is forwarded, false otherwise.
  48    */
  49   static inline bool is_forwarded(oop obj);
  50 
  51   /* Tries to atomically update forwardee in $holder object to $update.
  52    * Assumes $holder points at itself.
  53    * Asserts $holder is in from-space.
  54    * Asserts $update is in to-space.
  55    *
  56    * Returns the new object 'update' upon success, or

  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #ifndef SHARE_GC_SHENANDOAH_SHENANDOAHFORWARDING_HPP
  26 #define SHARE_GC_SHENANDOAH_SHENANDOAHFORWARDING_HPP
  27 
  28 #include "oops/oop.hpp"
  29 #include "utilities/globalDefinitions.hpp"
  30 
  31 class ShenandoahForwarding {
  32 public:
  33   /* Gets forwardee from the given object.
  34    */
  35   static inline oop get_forwardee(oop obj);
  36 
  37   /* Gets forwardee from the given object. Only from mutator thread.
  38    */
  39   static inline oop get_forwardee_mutator(oop obj);
  40 
  41   /* Returns the raw value from forwardee slot.
  42    */
  43   static inline HeapWord* get_forwardee_raw(oop obj);
  44 
  45   /* Returns the raw value from forwardee slot without any checks.
  46    * Used for quick verification.
  47    */
  48   static inline HeapWord* get_forwardee_raw_unchecked(oop obj);
  49 
  50   /**
  51    * Returns true if the object is forwarded, false otherwise.
  52    */
  53   static inline bool is_forwarded(oop obj);
  54 
  55   /* Tries to atomically update forwardee in $holder object to $update.
  56    * Assumes $holder points at itself.
  57    * Asserts $holder is in from-space.
  58    * Asserts $update is in to-space.
  59    *
  60    * Returns the new object 'update' upon success, or