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