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 <android-base/thread_annotations.h>
25 #include <cutils/log.h>
26 #include <gtest/gtest.h>
27
28 #include "minikin/FontCollection.h"
29 #include "minikin/Macros.h"
30 #include "minikin/MinikinPaint.h"
31 #include "FontTestUtils.h"
32 #include "MinikinInternal.h"
33 #include "PathUtils.h"
34
35 using android::base::ScopedLockAssertion;
36
37 namespace minikin {
38
39 constexpr int LAYOUT_COUNT_PER_COLLECTION = 500;
40 constexpr int COLLECTION_COUNT_PER_THREAD = 15;
41 constexpr int NUM_THREADS = 10;
42
43 std::mutex gMutex;
44 std::condition_variable gCv;
45 bool gReady GUARDED_BY(gMutex) = false;
46
generateTestText(std::mt19937 * mt,int lettersInWord,int wordsInText)47 static std::vector<uint16_t> generateTestText(std::mt19937* mt, int lettersInWord,
48 int wordsInText) {
49 std::uniform_int_distribution<uint16_t> dist('A', 'Z');
50
51 std::vector<uint16_t> text;
52 text.reserve((lettersInWord + 1) * wordsInText - 1);
53 for (int i = 0; i < wordsInText; ++i) {
54 if (i != 0) {
55 text.emplace_back(' ');
56 }
57 for (int j = 0; j < lettersInWord; ++j) {
58 text.emplace_back(dist(*mt));
59 }
60 }
61 return text;
62 }
63
thread_main(int tid)64 static void thread_main(int tid) {
65 {
66 // Wait until all threads are created.
67 std::unique_lock<std::mutex> lock(gMutex);
68 gCv.wait(lock, []() EXCLUSIVE_LOCKS_REQUIRED(gMutex) { return gReady; });
69 }
70
71 std::mt19937 mt(tid);
72
73 for (int i = 0; i < COLLECTION_COUNT_PER_THREAD; ++i) {
74 MinikinPaint paint(buildFontCollection("Ascii.ttf"));
75 paint.size = 10.0f; // Make 1em = 10px
76
77 for (int j = 0; j < LAYOUT_COUNT_PER_COLLECTION; ++j) {
78 // Generates 10 of 3-letter words so that the word sometimes hit the cache.
79 std::vector<uint16_t> text = generateTestText(&mt, 3, 10);
80 Layout layout(text, Range(0, text.size()), Bidi::LTR, paint, StartHyphenEdit::NO_EDIT,
81 EndHyphenEdit::NO_EDIT);
82 for (size_t k = 0; k < text.size(); ++k) {
83 // All characters in Ascii.ttf has 1.0em horizontal advance.
84 LOG_ALWAYS_FATAL_IF(layout.getCharAdvance(k) != 10.0f,
85 "Memory corruption detected.");
86 }
87 }
88 }
89 }
90
TEST(MultithreadTest,ThreadSafeStressTest)91 TEST(MultithreadTest, ThreadSafeStressTest) {
92 std::vector<std::thread> threads;
93
94 {
95 ScopedLockAssertion lock(gMutex);
96 threads.reserve(NUM_THREADS);
97 for (int i = 0; i < NUM_THREADS; ++i) {
98 threads.emplace_back(&thread_main, i);
99 }
100 gReady = true;
101 }
102 gCv.notify_all();
103
104 for (auto& thread : threads) {
105 thread.join();
106 }
107 }
108
109 } // namespace minikin
110