ffi/pointer-buffer

    cfunction
    src/core/ffi.c on line 1819, column 1

    (ffi/pointer-buffer pointer capacity &opt count offset)

    Create a buffer from a pointer. The underlying memory of the buffer 
    will not be reallocated or freed by the garbage collector, allowing 
    unmanaged, mutable memory to be manipulated with buffer functions. 
    Attempts to resize or extend the buffer beyond its initial capacity 
    will raise an error. As with many FFI functions, this is memory 
    unsafe and can potentially allow out of bounds memory access. 
    Returns a new buffer.