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94d1678c67
This patch implements the template class ConcurrentCache which will be used to implement all the thread-safe object caches in Dawn (e.g. PipelineLayout, ComputePipeline and RenderPipeline). BUG=dawn:529 TEST=dawn_unittests Change-Id: Ia6f75191110a93285bdb23fdc1d275444d1ee866 Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/67760 Reviewed-by: Corentin Wallez <cwallez@chromium.org> Reviewed-by: Austin Eng <enga@chromium.org> Commit-Queue: Jiawei Shao <jiawei.shao@intel.com>
115 lines
3.8 KiB
C++
115 lines
3.8 KiB
C++
// Copyright 2021 The Dawn Authors
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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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#include <gtest/gtest.h>
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#include "common/ConcurrentCache.h"
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#include "dawn_native/AsyncTask.h"
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#include "dawn_platform/DawnPlatform.h"
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#include "utils/SystemUtils.h"
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namespace {
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class SimpleCachedObject {
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public:
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explicit SimpleCachedObject(size_t value) : mValue(value) {
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}
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size_t GetValue() const {
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return mValue;
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}
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struct EqualityFunc {
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bool operator()(const SimpleCachedObject* a, const SimpleCachedObject* b) const {
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return a->mValue == b->mValue;
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}
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};
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struct HashFunc {
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size_t operator()(const SimpleCachedObject* obj) const {
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return obj->mValue;
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}
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};
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private:
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size_t mValue;
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};
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} // anonymous namespace
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class ConcurrentCacheTest : public testing::Test {
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public:
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ConcurrentCacheTest() : mPool(mPlatform.CreateWorkerTaskPool()), mTaskManager(mPool.get()) {
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}
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protected:
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dawn_platform::Platform mPlatform;
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std::unique_ptr<dawn_platform::WorkerTaskPool> mPool;
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dawn_native::AsyncTaskManager mTaskManager;
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ConcurrentCache<SimpleCachedObject> mCache;
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};
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// Test inserting two objects that are equal to each other into the concurrent cache works as
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// expected.
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TEST_F(ConcurrentCacheTest, InsertAtSameTime) {
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SimpleCachedObject cachedObject(1);
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SimpleCachedObject anotherCachedObject(1);
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std::pair<SimpleCachedObject*, bool> insertOutput = {};
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std::pair<SimpleCachedObject*, bool> anotherInsertOutput = {};
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ConcurrentCache<SimpleCachedObject>* cachePtr = &mCache;
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dawn_native::AsyncTask asyncTask1([&insertOutput, cachePtr, &cachedObject] {
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insertOutput = cachePtr->Insert(&cachedObject);
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});
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dawn_native::AsyncTask asyncTask2([&anotherInsertOutput, cachePtr, &anotherCachedObject] {
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anotherInsertOutput = cachePtr->Insert(&anotherCachedObject);
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});
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mTaskManager.PostTask(std::move(asyncTask1));
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mTaskManager.PostTask(std::move(asyncTask2));
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mTaskManager.WaitAllPendingTasks();
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ASSERT_TRUE(insertOutput.first == &cachedObject || insertOutput.first == &anotherCachedObject);
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ASSERT_EQ(insertOutput.first, anotherInsertOutput.first);
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ASSERT_EQ(insertOutput.second, !anotherInsertOutput.second);
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}
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// Testing erasing an object after inserting into the cache works as expected.
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TEST_F(ConcurrentCacheTest, EraseAfterInsertion) {
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SimpleCachedObject cachedObject(1);
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std::pair<SimpleCachedObject*, bool> insertOutput = {};
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ConcurrentCache<SimpleCachedObject>* cachePtr = &mCache;
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dawn_native::AsyncTask insertTask([&insertOutput, cachePtr, &cachedObject] {
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insertOutput = cachePtr->Insert(&cachedObject);
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});
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size_t erasedObjectCount = 0;
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dawn_native::AsyncTask eraseTask([&erasedObjectCount, cachePtr, &cachedObject] {
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while (cachePtr->Find(&cachedObject) == nullptr) {
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utils::USleep(100);
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}
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erasedObjectCount = cachePtr->Erase(&cachedObject);
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});
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mTaskManager.PostTask(std::move(insertTask));
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mTaskManager.PostTask(std::move(eraseTask));
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mTaskManager.WaitAllPendingTasks();
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ASSERT_EQ(&cachedObject, insertOutput.first);
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ASSERT_TRUE(insertOutput.second);
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ASSERT_EQ(1u, erasedObjectCount);
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}
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