/*
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* Copyright (C) 2017 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "minikin/Layout.h"
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#include <condition_variable>
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#include <mutex>
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#include <random>
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#include <thread>
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#include <cutils/log.h>
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#include <gtest/gtest.h>
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#include "minikin/FontCollection.h"
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#include "minikin/Macros.h"
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#include "minikin/MinikinPaint.h"
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#include "FontTestUtils.h"
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#include "MinikinInternal.h"
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#include "PathUtils.h"
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namespace minikin {
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constexpr int LAYOUT_COUNT_PER_COLLECTION = 500;
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constexpr int COLLECTION_COUNT_PER_THREAD = 15;
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constexpr int NUM_THREADS = 10;
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std::mutex gMutex;
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std::condition_variable gCv;
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bool gReady GUARDED_BY(gMutex) = false;
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static std::vector<uint16_t> generateTestText(std::mt19937* mt, int lettersInWord,
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int wordsInText) {
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std::uniform_int_distribution<uint16_t> dist('A', 'Z');
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std::vector<uint16_t> text;
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text.reserve((lettersInWord + 1) * wordsInText - 1);
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for (int i = 0; i < wordsInText; ++i) {
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if (i != 0) {
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text.emplace_back(' ');
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}
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for (int j = 0; j < lettersInWord; ++j) {
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text.emplace_back(dist(*mt));
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}
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}
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return text;
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}
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static void thread_main(int tid) {
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{
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// Wait until all threads are created.
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std::unique_lock<std::mutex> lock(gMutex);
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gCv.wait(lock, [] { return gReady; });
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}
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std::mt19937 mt(tid);
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for (int i = 0; i < COLLECTION_COUNT_PER_THREAD; ++i) {
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MinikinPaint paint(buildFontCollection("Ascii.ttf"));
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paint.size = 10.0f; // Make 1em = 10px
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for (int j = 0; j < LAYOUT_COUNT_PER_COLLECTION; ++j) {
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// Generates 10 of 3-letter words so that the word sometimes hit the cache.
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std::vector<uint16_t> text = generateTestText(&mt, 3, 10);
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Layout layout(text, Range(0, text.size()), Bidi::LTR, paint, StartHyphenEdit::NO_EDIT,
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EndHyphenEdit::NO_EDIT);
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for (size_t k = 0; k < text.size(); ++k) {
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// All characters in Ascii.ttf has 1.0em horizontal advance.
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LOG_ALWAYS_FATAL_IF(layout.getCharAdvance(k) != 10.0f,
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"Memory corruption detected.");
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}
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}
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}
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}
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TEST(MultithreadTest, ThreadSafeStressTest) {
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std::vector<std::thread> threads;
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{
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std::unique_lock<std::mutex> lock(gMutex);
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threads.reserve(NUM_THREADS);
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for (int i = 0; i < NUM_THREADS; ++i) {
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threads.emplace_back(&thread_main, i);
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}
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gReady = true;
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}
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gCv.notify_all();
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for (auto& thread : threads) {
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thread.join();
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}
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}
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} // namespace minikin
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