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// Copyright 2021 The Tint Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "src/tint/utils/block_allocator.h"
#include "gtest/gtest.h"
namespace tint::utils {
namespace {
struct LifetimeCounter {
explicit LifetimeCounter(size_t* count) : count_(count) { (*count)++; }
~LifetimeCounter() { (*count_)--; }
size_t* const count_;
};
using BlockAllocatorTest = testing::Test;
TEST_F(BlockAllocatorTest, Empty) {
using Allocator = BlockAllocator<int>;
Allocator allocator;
EXPECT_EQ(allocator.Count(), 0u);
for (int* i : allocator.Objects()) {
(void)i;
if ((true)) { // Workaround for "error: loop will run at most once"
FAIL() << "BlockAllocator should be empty";
}
}
for (const int* i : static_cast<const Allocator&>(allocator).Objects()) {
(void)i;
if ((true)) { // Workaround for "error: loop will run at most once"
FAIL() << "BlockAllocator should be empty";
}
}
}
TEST_F(BlockAllocatorTest, Count) {
using Allocator = BlockAllocator<int>;
for (size_t n : {0u, 1u, 10u, 16u, 20u, 32u, 50u, 64u, 100u, 256u, 300u, 512u, 500u, 512u}) {
Allocator allocator;
EXPECT_EQ(allocator.Count(), 0u);
for (size_t i = 0; i < n; i++) {
allocator.Create(123);
}
EXPECT_EQ(allocator.Count(), n);
}
}
TEST_F(BlockAllocatorTest, ObjectLifetime) {
using Allocator = BlockAllocator<LifetimeCounter>;
size_t count = 0;
{
Allocator allocator;
EXPECT_EQ(count, 0u);
allocator.Create(&count);
EXPECT_EQ(count, 1u);
allocator.Create(&count);
EXPECT_EQ(count, 2u);
allocator.Create(&count);
EXPECT_EQ(count, 3u);
}
EXPECT_EQ(count, 0u);
}
TEST_F(BlockAllocatorTest, MoveConstruct) {
using Allocator = BlockAllocator<LifetimeCounter>;
for (size_t n : {0u, 1u, 10u, 16u, 20u, 32u, 50u, 64u, 100u, 256u, 300u, 512u, 500u, 512u}) {
size_t count = 0;
{
Allocator allocator_a;
for (size_t i = 0; i < n; i++) {
allocator_a.Create(&count);
}
EXPECT_EQ(count, n);
EXPECT_EQ(allocator_a.Count(), n);
Allocator allocator_b{std::move(allocator_a)};
EXPECT_EQ(count, n);
EXPECT_EQ(allocator_b.Count(), n);
}
EXPECT_EQ(count, 0u);
}
}
TEST_F(BlockAllocatorTest, MoveAssign) {
using Allocator = BlockAllocator<LifetimeCounter>;
for (size_t n : {0u, 1u, 10u, 16u, 20u, 32u, 50u, 64u, 100u, 256u, 300u, 512u, 500u, 512u}) {
size_t count_a = 0;
size_t count_b = 0;
{
Allocator allocator_a;
for (size_t i = 0; i < n; i++) {
allocator_a.Create(&count_a);
}
EXPECT_EQ(count_a, n);
EXPECT_EQ(allocator_a.Count(), n);
Allocator allocator_b;
for (size_t i = 0; i < n; i++) {
allocator_b.Create(&count_b);
}
EXPECT_EQ(count_b, n);
EXPECT_EQ(allocator_b.Count(), n);
allocator_b = std::move(allocator_a);
EXPECT_EQ(count_a, n);
EXPECT_EQ(count_b, 0u);
EXPECT_EQ(allocator_b.Count(), n);
}
EXPECT_EQ(count_a, 0u);
EXPECT_EQ(count_b, 0u);
}
}
TEST_F(BlockAllocatorTest, ObjectOrder) {
using Allocator = BlockAllocator<int>;
Allocator allocator;
constexpr int N = 10000;
for (int i = 0; i < N; i++) {
allocator.Create(i);
}
{
int i = 0;
for (int* p : allocator.Objects()) {
EXPECT_EQ(*p, i);
i++;
}
EXPECT_EQ(i, N);
}
{
int i = 0;
for (const int* p : static_cast<const Allocator&>(allocator).Objects()) {
EXPECT_EQ(*p, i);
i++;
}
EXPECT_EQ(i, N);
}
}
} // namespace
} // namespace tint::utils