1 /* 2 * Copyright (C) 2012 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #include "jobject_comparator.h" 18 19 #include "mirror/array-inl.h" 20 #include "mirror/class-inl.h" 21 #include "mirror/object-inl.h" 22 #include "scoped_thread_state_change-inl.h" 23 24 namespace art { 25 26 bool JobjectComparator::operator()(jobject jobj1, jobject jobj2) const { 27 // Ensure null references and cleared jweaks appear at the end. 28 if (jobj1 == nullptr) { 29 return true; 30 } else if (jobj2 == nullptr) { 31 return false; 32 } 33 ScopedObjectAccess soa(Thread::Current()); 34 StackHandleScope<2> hs(soa.Self()); 35 Handle<mirror::Object> obj1(hs.NewHandle(soa.Decode<mirror::Object>(jobj1))); 36 Handle<mirror::Object> obj2(hs.NewHandle(soa.Decode<mirror::Object>(jobj2))); 37 if (obj1 == nullptr) { 38 return true; 39 } else if (obj2 == nullptr) { 40 return false; 41 } 42 // Sort by class... 43 if (obj1->GetClass() != obj2->GetClass()) { 44 return obj1->GetClass()->IdentityHashCode() < obj2->GetClass()->IdentityHashCode(); 45 } 46 // ...then by size... 47 const size_t count1 = obj1->SizeOf(); 48 const size_t count2 = obj2->SizeOf(); 49 if (count1 != count2) { 50 return count1 < count2; 51 } 52 // ...and finally by identity hash code. 53 return obj1->IdentityHashCode() < obj2->IdentityHashCode(); 54 } 55 56 } // namespace art 57
