jdk-24/hotspot/src/share/vm/oops/objArrayKlass.inline.hpp

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#ifndef SHARE_VM_OOPS_OBJARRAYKLASS_INLINE_HPP
#define SHARE_VM_OOPS_OBJARRAYKLASS_INLINE_HPP

#include "memory/memRegion.hpp"
#include "memory/iterator.inline.hpp"
#include "oops/arrayKlass.hpp"
#include "oops/klass.hpp"
#include "oops/objArrayKlass.hpp"
#include "oops/objArrayOop.inline.hpp"
#include "oops/oop.inline.hpp"
#include "utilities/macros.hpp"

template <bool nv, typename T, class OopClosureType>
void ObjArrayKlass::oop_oop_iterate_elements_specialized(objArrayOop a, OopClosureType* closure) {
  T* p         = (T*)a->base();
  T* const end = p + a->length();

  for (;p < end; p++) {
    Devirtualizer<nv>::do_oop(closure, p);
  }
}

template <bool nv, typename T, class OopClosureType>
void ObjArrayKlass::oop_oop_iterate_elements_specialized_bounded(
    objArrayOop a, OopClosureType* closure, void* low, void* high) {

  T* const l = (T*)low;
  T* const h = (T*)high;

  T* p   = (T*)a->base();
  T* end = p + a->length();

  if (p < l) {
    p = l;
  }
  if (end > h) {
    end = h;
  }

  for (;p < end; ++p) {
    Devirtualizer<nv>::do_oop(closure, p);
  }
}

template <bool nv, class OopClosureType>
void ObjArrayKlass::oop_oop_iterate_elements(objArrayOop a, OopClosureType* closure) {
  if (UseCompressedOops) {
    oop_oop_iterate_elements_specialized<nv, narrowOop>(a, closure);
  } else {
    oop_oop_iterate_elements_specialized<nv, oop>(a, closure);
  }
}

template <bool nv, class OopClosureType>
void ObjArrayKlass::oop_oop_iterate_elements_bounded(objArrayOop a, OopClosureType* closure, MemRegion mr) {
  if (UseCompressedOops) {
    oop_oop_iterate_elements_specialized_bounded<nv, narrowOop>(a, closure, mr.start(), mr.end());
  } else {
    oop_oop_iterate_elements_specialized_bounded<nv, oop>(a, closure, mr.start(), mr.end());
  }
}

template <bool nv, typename OopClosureType>
int ObjArrayKlass::oop_oop_iterate(oop obj, OopClosureType* closure) {
  assert (obj->is_array(), "obj must be array");
  objArrayOop a = objArrayOop(obj);

  // Get size before changing pointers.
  // Don't call size() or oop_size() since that is a virtual call.
  int size = a->object_size();
  if (Devirtualizer<nv>::do_metadata(closure)) {
    Devirtualizer<nv>::do_klass(closure, obj->klass());
  }

  oop_oop_iterate_elements<nv>(a, closure);

  return size;
}

template <bool nv, typename OopClosureType>
int ObjArrayKlass::oop_oop_iterate_bounded(oop obj, OopClosureType* closure, MemRegion mr) {
  assert(obj->is_array(), "obj must be array");
  objArrayOop a  = objArrayOop(obj);

  // Get size before changing pointers.
  // Don't call size() or oop_size() since that is a virtual call
  int size = a->object_size();

  if (Devirtualizer<nv>::do_metadata(closure)) {
    Devirtualizer<nv>::do_klass(closure, a->klass());
  }

  oop_oop_iterate_elements_bounded<nv>(a, closure, mr);

  return size;
}

template <bool nv, typename T, class OopClosureType>
void ObjArrayKlass::oop_oop_iterate_range_specialized(objArrayOop a, OopClosureType* closure, int start, int end) {
  if (Devirtualizer<nv>::do_metadata(closure)) {
    Devirtualizer<nv>::do_klass(closure, a->klass());
  }

  T* low = start == 0 ? cast_from_oop<T*>(a) : a->obj_at_addr<T>(start);
  T* high = (T*)a->base() + end;

  oop_oop_iterate_elements_specialized_bounded<nv, T>(a, closure, low, high);
}

// Like oop_oop_iterate but only iterates over a specified range and only used
// for objArrayOops.
template <bool nv, class OopClosureType>
int ObjArrayKlass::oop_oop_iterate_range(oop obj, OopClosureType* closure, int start, int end) {
  assert(obj->is_array(), "obj must be array");
  objArrayOop a  = objArrayOop(obj);

  // Get size before changing pointers.
  // Don't call size() or oop_size() since that is a virtual call
  int size = a->object_size();

  if (UseCompressedOops) {
    oop_oop_iterate_range_specialized<nv, narrowOop>(a, closure, start, end);
  } else {
    oop_oop_iterate_range_specialized<nv, oop>(a, closure, start, end);
  }

  return size;
}

#define ALL_OBJ_ARRAY_KLASS_OOP_OOP_ITERATE_DEFN(OopClosureType, nv_suffix)    \
  OOP_OOP_ITERATE_DEFN(             ObjArrayKlass, OopClosureType, nv_suffix)  \
  OOP_OOP_ITERATE_DEFN_BOUNDED(     ObjArrayKlass, OopClosureType, nv_suffix)  \
  OOP_OOP_ITERATE_DEFN_RANGE(       ObjArrayKlass, OopClosureType, nv_suffix)  \
  OOP_OOP_ITERATE_DEFN_NO_BACKWARDS(ObjArrayKlass, OopClosureType, nv_suffix)

#endif // SHARE_VM_OOPS_OBJARRAYKLASS_INLINE_HPP