datareader.py 文件源码

def makeDataObject(num):
    """
    Creates the ctypes data object used by both processes - defines the layout
    of the shared memory.
    """
    class DataBlock(ctypes.Structure):
            _fields_ = [("y", ctypes.c_float*(num*3)),
                        ("y10", ctypes.c_float*(num//10*3)),
                        ("y100", ctypes.c_float*(num//100*3)),
                        ("endpoint", ctypes.c_ssize_t),
                        ("startpoint", ctypes.c_ssize_t),
                        ("pltcurrent", ctypes.c_ssize_t)]
    return num