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// Copyright 2020 The Pigweed 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
//
// https://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 "pw_malloc_freelist/freelist_malloc.h"
#include <memory>
#include <span>
#include "gtest/gtest.h"
#include "pw_allocator/freelist_heap.h"
namespace pw::allocator {
TEST(FreeListMalloc, ReplacingMalloc) {
constexpr size_t kAllocSize = 256;
constexpr size_t kReallocSize = 512;
constexpr size_t kCallocNum = 4;
constexpr size_t kCallocSize = 64;
constexpr size_t zero = 0;
auto deleter = [](void* ptr) { free(ptr); };
std::unique_ptr<void, decltype(deleter)> ptr1(malloc(kAllocSize), deleter);
const FreeListHeap::HeapStats& freelist_heap_stats =
pw_freelist_heap->heap_stats();
ASSERT_NE(ptr1.get(), nullptr);
EXPECT_EQ(freelist_heap_stats.bytes_allocated, kAllocSize);
EXPECT_EQ(freelist_heap_stats.cumulative_allocated, kAllocSize);
EXPECT_EQ(freelist_heap_stats.cumulative_freed, zero);
std::unique_ptr<void, decltype(deleter)> ptr2(
realloc(ptr1.release(), kReallocSize), deleter);
ASSERT_NE(ptr2.get(), nullptr);
EXPECT_EQ(freelist_heap_stats.bytes_allocated, kReallocSize);
EXPECT_EQ(freelist_heap_stats.cumulative_allocated,
kAllocSize + kReallocSize);
EXPECT_EQ(freelist_heap_stats.cumulative_freed, kAllocSize);
std::unique_ptr<void, decltype(deleter)> ptr3(calloc(kCallocNum, kCallocSize),
deleter);
ASSERT_NE(ptr3.get(), nullptr);
EXPECT_EQ(freelist_heap_stats.bytes_allocated,
kReallocSize + kCallocNum * kCallocSize);
EXPECT_EQ(freelist_heap_stats.cumulative_allocated,
kAllocSize + kReallocSize + kCallocNum * kCallocSize);
EXPECT_EQ(freelist_heap_stats.cumulative_freed, kAllocSize);
free(ptr2.release());
EXPECT_EQ(freelist_heap_stats.bytes_allocated, kCallocNum * kCallocSize);
EXPECT_EQ(freelist_heap_stats.cumulative_allocated,
kAllocSize + kReallocSize + kCallocNum * kCallocSize);
EXPECT_EQ(freelist_heap_stats.cumulative_freed, kAllocSize + kReallocSize);
free(ptr3.release());
EXPECT_EQ(freelist_heap_stats.bytes_allocated, zero);
EXPECT_EQ(freelist_heap_stats.cumulative_allocated,
kAllocSize + kReallocSize + kCallocNum * kCallocSize);
EXPECT_EQ(freelist_heap_stats.cumulative_freed,
kAllocSize + kReallocSize + kCallocNum * kCallocSize);
}
} // namespace pw::allocator
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