cctypes.py 文件源码

def memalign(cty, align):
    """Allocate a ctype object on the specific byte alignment
    """
    # Allocate bytes with offset
    mem = (c_uint8 * (sizeof(cty) + align))()
    addr = addressof(mem)

    # Move to alignment
    offset = addr % align
    if offset:
        offset = align - offset

    buf = cty.from_address(offset + addr)
    assert 0 == addressof(buf) % align

    return buf, mem