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//===--- unittest/Support/RecyclerTest.cpp --------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "llvm/Support/Recycler.h"
#include "llvm/Support/AllocatorBase.h"
#include "gtest/gtest.h"
using namespace llvm;
namespace {
struct Object1 {
char Data[1];
};
struct Object8 {
char Data[8];
};
class DecoratedMallocAllocator : public MallocAllocator {
public:
int DeallocCount = 0;
void Deallocate(const void *Ptr, size_t Size, size_t Alignment) {
DeallocCount++;
MallocAllocator::Deallocate(Ptr, Size, Alignment);
}
template <typename T> void Deallocate(T *Ptr) {
DeallocCount++;
MallocAllocator::Deallocate(Ptr);
}
};
TEST(RecyclerTest, RecycleAllocation) {
DecoratedMallocAllocator Allocator;
// Recycler needs size to be atleast 8 bytes.
Recycler<Object1, 8, 8> R;
Object1 *A1 = R.Allocate(Allocator);
Object1 *A2 = R.Allocate(Allocator);
R.Deallocate(Allocator, A2);
Object1 *A3 = R.Allocate(Allocator);
EXPECT_EQ(A2, A3); // reuse the deallocated object.
R.Deallocate(Allocator, A1);
R.Deallocate(Allocator, A3);
R.clear(Allocator); // Should deallocate A1 and A3.
EXPECT_EQ(Allocator.DeallocCount, 2);
}
TEST(RecyclerTest, MoveConstructor) {
DecoratedMallocAllocator Allocator;
Recycler<Object8> R;
Object8 *A1 = R.Allocate(Allocator);
Object8 *A2 = R.Allocate(Allocator);
R.Deallocate(Allocator, A1);
R.Deallocate(Allocator, A2);
Recycler<Object8> R2(std::move(R));
Object8 *A3 = R2.Allocate(Allocator);
R2.Deallocate(Allocator, A3);
R.clear(Allocator); // Should not deallocate anything as it was moved from.
EXPECT_EQ(Allocator.DeallocCount, 0);
R2.clear(Allocator);
EXPECT_EQ(Allocator.DeallocCount, 2);
}
} // end anonymous namespace
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