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/*
* 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.h"
namespace art {
bool JobjectComparator::operator()(jobject jobj1, jobject jobj2) const {
// Ensure null references and cleared jweaks appear at the end.
if (jobj1 == NULL) {
return true;
} else if (jobj2 == NULL) {
return false;
}
ScopedObjectAccess soa(Thread::Current());
mirror::Object* obj1 = soa.Decode<mirror::Object*>(jobj1);
mirror::Object* obj2 = soa.Decode<mirror::Object*>(jobj2);
if (obj1 == NULL) {
return true;
} else if (obj2 == NULL) {
return false;
}
// Sort by class...
if (obj1->GetClass() != obj2->GetClass()) {
return obj1->GetClass()->IdentityHashCode() < obj2->IdentityHashCode();
} else {
// ...then by size...
size_t count1 = obj1->SizeOf();
size_t count2 = obj2->SizeOf();
if (count1 != count2) {
return count1 < count2;
} else {
// ...and finally by identity hash code.
return obj1->IdentityHashCode() < obj2->IdentityHashCode();
}
}
}
} // namespace art
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