1 /*
2 * Copyright (C) 2017 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 "minikin/Layout.h"
18
19 #include <condition_variable>
20 #include <mutex>
21 #include <random>
22 #include <thread>
23
24 #include <cutils/log.h>
25 #include <gtest/gtest.h>
26
27 #include "minikin/FontCollection.h"
28 #include "minikin/Macros.h"
29
30 #include "FontTestUtils.h"
31 #include "MinikinInternal.h"
32 #include "PathUtils.h"
33
34 namespace minikin {
35
36 constexpr int LAYOUT_COUNT_PER_COLLECTION = 500;
37 constexpr int COLLECTION_COUNT_PER_THREAD = 15;
38 constexpr int NUM_THREADS = 10;
39
40 std::mutex gMutex;
41 std::condition_variable gCv;
42 bool gReady GUARDED_BY(gMutex) = false;
43
generateTestText(std::mt19937 * mt,int lettersInWord,int wordsInText)44 static std::vector<uint16_t> generateTestText(std::mt19937* mt, int lettersInWord,
45 int wordsInText) {
46 std::uniform_int_distribution<uint16_t> dist('A', 'Z');
47
48 std::vector<uint16_t> text;
49 text.reserve((lettersInWord + 1) * wordsInText - 1);
50 for (int i = 0; i < wordsInText; ++i) {
51 if (i != 0) {
52 text.emplace_back(' ');
53 }
54 for (int j = 0; j < lettersInWord; ++j) {
55 text.emplace_back(dist(*mt));
56 }
57 }
58 return text;
59 }
60
thread_main(int tid)61 static void thread_main(int tid) {
62 {
63 // Wait until all threads are created.
64 std::unique_lock<std::mutex> lock(gMutex);
65 gCv.wait(lock, [] { return gReady; });
66 }
67
68 std::mt19937 mt(tid);
69
70 for (int i = 0; i < COLLECTION_COUNT_PER_THREAD; ++i) {
71 MinikinPaint paint(buildFontCollection("Ascii.ttf"));
72 paint.size = 10.0f; // Make 1em = 10px
73
74 for (int j = 0; j < LAYOUT_COUNT_PER_COLLECTION; ++j) {
75 // Generates 10 of 3-letter words so that the word sometimes hit the cache.
76 Layout layout;
77 std::vector<uint16_t> text = generateTestText(&mt, 3, 10);
78 layout.doLayout(text, Range(0, text.size()), Bidi::LTR, paint, StartHyphenEdit::NO_EDIT,
79 EndHyphenEdit::NO_EDIT);
80 std::vector<float> advances(text.size());
81 layout.getAdvances(advances.data());
82 for (size_t k = 0; k < advances.size(); ++k) {
83 // All characters in Ascii.ttf has 1.0em horizontal advance.
84 LOG_ALWAYS_FATAL_IF(advances[k] != 10.0f, "Memory corruption detected.");
85 }
86 }
87 }
88 }
89
TEST(MultithreadTest,ThreadSafeStressTest)90 TEST(MultithreadTest, ThreadSafeStressTest) {
91 std::vector<std::thread> threads;
92
93 {
94 std::unique_lock<std::mutex> lock(gMutex);
95 threads.reserve(NUM_THREADS);
96 for (int i = 0; i < NUM_THREADS; ++i) {
97 threads.emplace_back(&thread_main, i);
98 }
99 gReady = true;
100 }
101 gCv.notify_all();
102
103 for (auto& thread : threads) {
104 thread.join();
105 }
106 }
107
108 } // namespace minikin
109