internal void ReturnNative(SharedMemory sm)
{
sm.FromOwnedDisposedToReleasingDisposed();
Debug.Assert(sm.IsDisposed);
ThrowHelper.AssertFailFast(sm.Header.FlagsCounter == (HeaderFlags.Releasing | HeaderFlags.IsDisposed), "ReturnNative: sm.Header.FlagsCounter == (HeaderFlags.Releasing | HeaderFlags.IsDisposed)");
// Now the buffer is logically free. To be able to reuse it
// we must return it to the free list. If the next operation fails
// the buffer leaks. Since it is in shared memory it will be paged
// and its backing RAM will be reused. Fails should happen very
// rarely so leaving a small region of a file is not a big deal.
// However we still have a logic to detect such cases.
// Use RetryReturnNative(BufferRef) to try to return
_bra.Free(sm.BufferRef);
// Keep Releasing flag, it is ignored by Rent.
// Do not clear instanceId, BRA.Allocate always overwrites it.
// It is only needed when a buffer is in allocated list, the
// value is irrelevant for free buffers.
SharedMemory.Free(sm);
}