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.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 == NULL) { 29 return true; 30 } else if (jobj2 == NULL) { 31 return false; 32 } 33 ScopedObjectAccess soa(Thread::Current()); 34 mirror::Object* obj1 = soa.Decode<mirror::Object*>(jobj1); 35 mirror::Object* obj2 = soa.Decode<mirror::Object*>(jobj2); 36 if (obj1 == NULL) { 37 return true; 38 } else if (obj2 == NULL) { 39 return false; 40 } 41 // Sort by class... 42 if (obj1->GetClass() != obj2->GetClass()) { 43 return obj1->GetClass()->IdentityHashCode() < obj2->IdentityHashCode(); 44 } else { 45 // ...then by size... 46 size_t count1 = obj1->SizeOf(); 47 size_t count2 = obj2->SizeOf(); 48 if (count1 != count2) { 49 return count1 < count2; 50 } else { 51 // ...and finally by identity hash code. 52 return obj1->IdentityHashCode() < obj2->IdentityHashCode(); 53 } 54 } 55 } 56 57 } // namespace art 58
