/// <summary>
/// Gets an <see cref="MemoryManager{T}"/> from the underlying read-only memory.
/// If unable to get the <typeparamref name="TManager"/> type, returns false.
/// </summary>
/// <typeparam name="T">The element type of the <paramref name="memory" />.</typeparam>
/// <typeparam name="TManager">The type of <see cref="MemoryManager{T}"/> to try and retrive.</typeparam>
/// <param name="memory">The memory to get the manager for.</param>
/// <param name="manager">The returned manager of the <see cref="ReadOnlyMemory{T}"/>.</param>
/// <returns>A <see cref="bool"/> indicating if it was successful.</returns>
public static bool TryGetMemoryManager <T, TManager>(ReadOnlyMemory <T> memory, out TManager manager)
where TManager : MemoryManager <T>
{
TManager localManager; // Use register for null comparison rather than byref
manager = localManager = memory.GetObjectStartLength(out _, out _) as TManager;
return(manager != null);
}
public static bool TryGetMemoryManager <T, TManager>(ReadOnlyMemory <T> memory, out TManager?manager) // TODO-NULLABLE: https://github.com/dotnet/roslyn/issues/26761
where TManager : MemoryManager <T>
{
TManager?localManager; // Use register for null comparison rather than byref
manager = localManager = memory.GetObjectStartLength(out _, out _) as TManager;
return(localManager != null);
}
/// <summary>
/// Gets a <see cref="OwnedMemory{T}"/> and <paramref name="index" />, <paramref name="length" /> from the underlying memory.
/// If unable to get the <typeparamref name="TOwner"/> type, returns false.
/// </summary>
/// <typeparam name="T">The element type of the <paramref name="readOnlyMemory" />.</typeparam>
/// <typeparam name="TOwner">The type of <see cref="OwnedMemory{T}"/> to try and retrive.</typeparam>
/// <param name="readOnlyMemory">The memory to get the owner for.</param>
/// <param name="ownedMemory">The returned owner of the <see cref="ReadOnlyMemory{T}"/>.</param>
/// <param name="index">The offset from the start of the <paramref name="ownedMemory" /> that the <paramref name="readOnlyMemory" /> represents.</param>
/// <param name="length">The length of the <paramref name="ownedMemory" /> that the <paramref name="readOnlyMemory" /> represents.</param>
/// <returns>A <see cref="bool"/> indicating if it was successful.</returns>
public static bool TryGetOwnedMemory <T, TOwner>(ReadOnlyMemory <T> readOnlyMemory, out TOwner ownedMemory, out int index, out int length)
where TOwner : OwnedMemory <T>
{
TOwner owner; // Use register for null comparison rather than byref
ownedMemory = owner = readOnlyMemory.GetObjectStartLength(out index, out length) as TOwner;
return(!ReferenceEquals(owner, null));
}
/// <summary>
/// Gets an <see cref="OwnedMemory{T}"/> and <paramref name="start" />, <paramref name="length" /> from the underlying read-only memory.
/// If unable to get the <typeparamref name="TOwner"/> type, returns false.
/// </summary>
/// <typeparam name="T">The element type of the <paramref name="memory" />.</typeparam>
/// <typeparam name="TOwner">The type of <see cref="OwnedMemory{T}"/> to try and retrive.</typeparam>
/// <param name="memory">The memory to get the owner for.</param>
/// <param name="owner">The returned owner of the <see cref="ReadOnlyMemory{T}"/>.</param>
/// <param name="start">The offset from the start of the <paramref name="owner" /> that the <paramref name="memory" /> represents.</param>
/// <param name="length">The length of the <paramref name="owner" /> that the <paramref name="memory" /> represents.</param>
/// <returns>A <see cref="bool"/> indicating if it was successful.</returns>
public static bool TryGetOwnedMemory <T, TOwner>(ReadOnlyMemory <T> memory, out TOwner owner, out int start, out int length)
where TOwner : OwnedMemory <T>
{
TOwner localOwner; // Use register for null comparison rather than byref
owner = localOwner = memory.GetObjectStartLength(out start, out length) as TOwner;
start &= ReadOnlyMemory <T> .RemoveOwnedFlagBitMask;
return(!ReferenceEquals(owner, null));
}
/// <summary>
/// Gets an <see cref="MemoryManager{T}"/> and <paramref name="start" />, <paramref name="length" /> from the underlying read-only memory.
/// If unable to get the <typeparamref name="TManager"/> type, returns false.
/// </summary>
/// <typeparam name="T">The element type of the <paramref name="memory" />.</typeparam>
/// <typeparam name="TManager">The type of <see cref="MemoryManager{T}"/> to try and retrive.</typeparam>
/// <param name="memory">The memory to get the manager for.</param>
/// <param name="manager">The returned manager of the <see cref="ReadOnlyMemory{T}"/>.</param>
/// <param name="start">The offset from the start of the <paramref name="manager" /> that the <paramref name="memory" /> represents.</param>
/// <param name="length">The length of the <paramref name="manager" /> that the <paramref name="memory" /> represents.</param>
/// <returns>A <see cref="bool"/> indicating if it was successful.</returns>
public static bool TryGetMemoryManager <T, TManager>(ReadOnlyMemory <T> memory, out TManager manager, out int start, out int length)
where TManager : MemoryManager <T>
{
TManager localManager; // Use register for null comparison rather than byref
manager = localManager = memory.GetObjectStartLength(out start, out length) as TManager;
Debug.Assert(length >= 0);
if (manager == null)
{
start = default;
length = default;
return(false);
}
return(true);
}
public static bool TryGetMemoryManager <T, TManager>(ReadOnlyMemory <T> memory, out TManager?manager, out int start, out int length) // TODO-NULLABLE: https://github.com/dotnet/roslyn/issues/26761
where TManager : MemoryManager <T>
{
TManager?localManager; // Use register for null comparison rather than byref
manager = localManager = memory.GetObjectStartLength(out start, out length) as TManager;
Debug.Assert(length >= 0);
if (localManager == null)
{
start = default;
length = default;
return(false);
}
return(true);
}
