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      1 /*
      2  * Copyright (C) 2015 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 <gtest/gtest.h>
     18 #include <utils/LinearAllocator.h>
     19 
     20 using namespace android;
     21 using namespace android::uirenderer;
     22 
     23 struct SimplePair {
     24     int one = 1;
     25     int two = 2;
     26 };
     27 
     28 class SignalingDtor {
     29 public:
     30     SignalingDtor() {
     31         mDestroyed = nullptr;
     32     }
     33     SignalingDtor(bool* destroyedSignal) {
     34         mDestroyed = destroyedSignal;
     35         *mDestroyed = false;
     36     }
     37     virtual ~SignalingDtor() {
     38         if (mDestroyed) {
     39             *mDestroyed = true;
     40         }
     41     }
     42     void setSignal(bool* destroyedSignal) {
     43         mDestroyed = destroyedSignal;
     44     }
     45 private:
     46     bool* mDestroyed;
     47 };
     48 
     49 TEST(LinearAllocator, alloc) {
     50     LinearAllocator la;
     51     EXPECT_EQ(0u, la.usedSize());
     52     la.alloc(64);
     53     // There's some internal tracking as well as padding
     54     // so the usedSize isn't strictly defined
     55     EXPECT_LE(64u, la.usedSize());
     56     EXPECT_GT(80u, la.usedSize());
     57     auto pair = la.alloc<SimplePair>();
     58     EXPECT_LE(64u + sizeof(SimplePair), la.usedSize());
     59     EXPECT_GT(80u + sizeof(SimplePair), la.usedSize());
     60     EXPECT_EQ(1, pair->one);
     61     EXPECT_EQ(2, pair->two);
     62 }
     63 
     64 TEST(LinearAllocator, dtor) {
     65     bool destroyed[10];
     66     {
     67         LinearAllocator la;
     68         for (int i = 0; i < 5; i++) {
     69             la.alloc<SignalingDtor>()->setSignal(destroyed + i);
     70             la.alloc<SimplePair>();
     71         }
     72         la.alloc(100);
     73         for (int i = 0; i < 5; i++) {
     74             auto sd = new (la) SignalingDtor(destroyed + 5 + i);
     75             la.autoDestroy(sd);
     76             new (la) SimplePair();
     77         }
     78         la.alloc(100);
     79         for (int i = 0; i < 10; i++) {
     80             EXPECT_FALSE(destroyed[i]);
     81         }
     82     }
     83     for (int i = 0; i < 10; i++) {
     84         EXPECT_TRUE(destroyed[i]);
     85     }
     86 }
     87 
     88 TEST(LinearAllocator, rewind) {
     89     bool destroyed;
     90     {
     91         LinearAllocator la;
     92         auto addr = la.alloc(100);
     93         EXPECT_LE(100u, la.usedSize());
     94         la.rewindIfLastAlloc(addr, 100);
     95         EXPECT_GT(16u, la.usedSize());
     96         size_t emptySize = la.usedSize();
     97         auto sigdtor = la.alloc<SignalingDtor>();
     98         sigdtor->setSignal(&destroyed);
     99         EXPECT_FALSE(destroyed);
    100         EXPECT_LE(emptySize, la.usedSize());
    101         la.rewindIfLastAlloc(sigdtor);
    102         EXPECT_TRUE(destroyed);
    103         EXPECT_EQ(emptySize, la.usedSize());
    104         destroyed = false;
    105     }
    106     // Checking for a double-destroy case
    107     EXPECT_EQ(destroyed, false);
    108 }
    109