Question

class Machine
{
  [UnmanagedFunctionPointer(CallingConvention.StdCall)]
  delegate int delConnectionCallback(IntPtr caller, int MachineIndex);

  [UnmanagedFunctionPointer(CallingConvention.StdCall)]
  delegate int delDisconnectionCallback(IntPtr caller, int MachineIndex));

  private static void Run()
  {
     // random machine for test purposes
     int machineIndex = 12;

     // Return the memory address of the functions where the callback will happen
     // These will be passed to the MachineDriverDLL class so that the C++ Driver DLL 
     //    knows where to return the call
     IntPtr ptrConnect = Marshal.GetFunctionPointerForDelegate(OnConnCallback);
     IntPtr ptrDisconn = Marshal.GetFunctionPointerForDelegate(OnDiscCallback);

     // map the machine dll object 
     var m = new MachineDriverDll();

     // connect to the machine
     m.Connect(machineIndex, ptrConnect, ptrDisconnect);
  }

  // Connect call from the DLL driver
  private static delConnectionCallback OnConnCallback = (caller, MachineIndex) =>
  {         
     Log(MachineIndex);

     // more long code here

     return 0;
  };

  // Disconnect Call from the DLL driver
  private static delDisconnectionCallback OnDiscCallback = (caller, MachineIndex) =>
  {
     Log(MachineIndex);

     // more long code here

     return 0;
  };
}

从p + DLL调用

OnConnCallback和OnDiscCallback。如何构造代码，以便以异步方式在不同的线程中调用这两个函数，而不会中断for循环？

目前，for循环会在任何一个回调触发时停止计数。

Answer 1

您需要做的就是更新这行代码 -

m.Connect(machineIndex, ptrConnect, ptrDisconnect);

到

System.Threading.Tasks.Task.Factory.StartNew(() => m.Connect(machineIndex, ptrConnect, ptrDisconnect));

这样，它就可以在单独的线程上启动C ++代码，而不是在当前运行的线程上启动。只需确保在退出C＃代码之前彻底退出/处理C ++代码。

在单独的线程中调用回调函数

1 个答案: