internal RetainedMemory(Memory <T> memory) { if (MemoryMarshal.TryGetMemoryManager <T, RetainableMemory <T> >(memory, out var manager)) { manager.Increment(); _manager = manager; _start = 0; _length = memory.Length; } else if (MemoryMarshal.TryGetArray <T>(memory, out var segment)) { _manager = ArrayMemory <T> .Create(segment.Array, segment.Offset, segment.Count, externallyOwned : true); _manager.Increment(); _start = 0; _length = _manager.Length; } else { ThrowNotSupportedMemoryType(); _manager = default; _start = 0; _length = 0; } #if DETECT_LEAKS _finalizeChecker = new PanicOnFinalize(); #endif }
public RetainedMemory(Memory <T> memory, bool pin = true) // TODO pin param added later and before it behaved like with true, but better to change to false and review usage { if (MemoryMarshal.TryGetMemoryManager <T, RetainableMemory <T> >(memory, out var manager)) { if (!manager.IsPinned && pin) { // TODO review. This uses implementation detail of RetainableMemory: // if pointer is null then it is an non-pinned array for which we did not create // a GCHandle (very expensive). Call to Pin() checks if pointer is null and // creates a GCHandle + pointer. Try to avoid pinning non-pooled ArrayMemory // because it is very expensive. manager.Pin(); } else { manager.Increment(); } _manager = manager; _offset = 0; _length = memory.Length; } else if (MemoryMarshal.TryGetArray <T>(memory, out var segment)) { _manager = ArrayMemory <T> .Create(segment.Array, segment.Offset, segment.Count, externallyOwned : true, pin); _manager.Increment(); _offset = 0; _length = _manager.Length; } else { ThrowNotSupportedMemoryType(); _manager = default; _offset = 0; _length = 0; } #if DETECT_LEAKS _finalizeChecker = new PanicOnFinalize(); #endif }
internal RetainedMemory(RetainableMemory <T> memory, int start, int length, bool borrow) { if (memory.IsDisposed) { BuffersThrowHelper.ThrowDisposed <RetainableMemory <T> >(); } Debug.Assert(unchecked ((uint)start + (uint)length <= memory.Length)); if (borrow) { memory.Increment(); } _manager = memory; _start = start; _length = length; #if DETECT_LEAKS _finalizeChecker = new PanicOnFinalize(); #endif }
internal RetainedMemory(RetainableMemory <T> memory, int offset, int length, bool borrow, PanicOnFinalize checker = null)