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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
using System.Buffers;
using Xunit;
namespace System.MemoryTests
{
public static partial class ReadOnlyMemoryTests
{
[Fact]
public static void MemoryRetainWithoutPinning()
{
int[] array = { 1, 2, 3, 4, 5 };
ReadOnlyMemory<int> memory = array;
MemoryHandle handle = memory.Retain();
Assert.False(handle.HasPointer);
unsafe
{
Assert.True(handle.Pointer == null);
}
handle.Dispose();
}
[Fact]
public static void MemoryRetainWithPinning()
{
int[] array = { 1, 2, 3, 4, 5 };
ReadOnlyMemory<int> memory = array;
MemoryHandle handle = memory.Retain(pin: true);
Assert.True(handle.HasPointer);
unsafe
{
int* pointer = (int*)handle.Pointer;
GC.Collect();
for (int i = 0; i < memory.Length; i++)
{
Assert.Equal(array[i], pointer[i]);
}
}
handle.Dispose();
}
[Fact]
public static void MemoryFromEmptyArrayRetainWithPinning()
{
ReadOnlyMemory<int> memory = new int[0];
MemoryHandle handle = memory.Retain(pin: true);
Assert.True(handle.HasPointer);
handle.Dispose();
}
[Fact]
public static void MemoryRetainWithPinningAndSlice()
{
int[] array = { 1, 2, 3, 4, 5 };
ReadOnlyMemory<int> memory = array;
memory = memory.Slice(1);
MemoryHandle handle = memory.Retain(pin: true);
ReadOnlySpan<int> span = memory.Span;
Assert.True(handle.HasPointer);
unsafe
{
int* pointer = (int*)handle.Pointer;
GC.Collect();
for (int i = 0; i < memory.Length; i++)
{
Assert.Equal(array[i + 1], pointer[i]);
}
for (int i = 0; i < memory.Length; i++)
{
Assert.Equal(array[i + 1], span[i]);
}
}
handle.Dispose();
}
[Fact]
public static void OwnedMemoryRetainWithoutPinning()
{
int[] array = { 1, 2, 3, 4, 5 };
OwnedMemory<int> owner = new CustomMemoryForTest<int>(array);
ReadOnlyMemory<int> memory = owner.Memory;
MemoryHandle handle = memory.Retain();
Assert.False(handle.HasPointer);
unsafe
{
Assert.True(handle.Pointer == null);
}
handle.Dispose();
}
[Fact]
public static void OwnedMemoryRetainWithPinning()
{
int[] array = { 1, 2, 3, 4, 5 };
OwnedMemory<int> owner = new CustomMemoryForTest<int>(array);
ReadOnlyMemory<int> memory = owner.Memory;
MemoryHandle handle = memory.Retain(pin: true);
Assert.True(handle.HasPointer);
unsafe
{
int* pointer = (int*)handle.Pointer;
GC.Collect();
for (int i = 0; i < memory.Length; i++)
{
Assert.Equal(array[i], pointer[i]);
}
}
handle.Dispose();
}
[Fact]
public static void OwnedMemoryRetainWithPinningAndSlice()
{
int[] array = { 1, 2, 3, 4, 5 };
OwnedMemory<int> owner = new CustomMemoryForTest<int>(array);
ReadOnlyMemory<int> memory = owner.Memory.Slice(1);
MemoryHandle handle = memory.Retain(pin: true);
ReadOnlySpan<int> span = memory.Span;
Assert.True(handle.HasPointer);
unsafe
{
int* pointer = (int*)handle.Pointer;
GC.Collect();
for (int i = 0; i < memory.Length; i++)
{
Assert.Equal(array[i + 1], pointer[i]);
}
for (int i = 0; i < memory.Length; i++)
{
Assert.Equal(array[i + 1], span[i]);
}
}
handle.Dispose();
}
[Theory]
[InlineData(true)]
[InlineData(false)]
public static void DefaultMemoryRetain(bool pin)
{
ReadOnlyMemory<int> memory = default;
MemoryHandle handle = memory.Retain(pin: pin);
Assert.False(handle.HasPointer);
unsafe
{
Assert.True(handle.Pointer == null);
}
handle.Dispose();
}
}
}
|
