blob: 443f095d05629013ff237ca7c69dc81cb0eaadd2 [file] [log] [blame]
/*
* Copyright (C) 2012 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "jobject_comparator.h"
#include "mirror/array-inl.h"
#include "mirror/class-inl.h"
#include "mirror/object-inl.h"
#include "scoped_thread_state_change-inl.h"
namespace art {
bool JobjectComparator::operator()(jobject jobj1, jobject jobj2) const {
// Ensure null references and cleared jweaks appear at the end.
if (jobj1 == nullptr) {
return true;
} else if (jobj2 == nullptr) {
return false;
}
ScopedObjectAccess soa(Thread::Current());
StackHandleScope<2> hs(soa.Self());
Handle<mirror::Object> obj1(hs.NewHandle(soa.Decode<mirror::Object>(jobj1)));
Handle<mirror::Object> obj2(hs.NewHandle(soa.Decode<mirror::Object>(jobj2)));
if (obj1.Get() == nullptr) {
return true;
} else if (obj2.Get() == nullptr) {
return false;
}
// Sort by class...
if (obj1->GetClass() != obj2->GetClass()) {
return obj1->GetClass()->IdentityHashCode() < obj2->GetClass()->IdentityHashCode();
}
// ...then by size...
const size_t count1 = obj1->SizeOf();
const size_t count2 = obj2->SizeOf();
if (count1 != count2) {
return count1 < count2;
}
// ...and finally by identity hash code.
return obj1->IdentityHashCode() < obj2->IdentityHashCode();
}
} // namespace art