<![CDATA[James's Programming Page — DeviceList.Local.Changed not triggered on Linux without modifications]]> 2019-07-20T21:20:20Z PunBB https://swforum.seekye.com/topic/10120/ <![CDATA[Re: DeviceList.Local.Changed not triggered on Linux without modifications]]> Try this:
https://www.zer7.com/files/oss/hidsharp … -07-20.zip

]]> https://swforum.seekye.com/user/2/ 2019-07-20T21:20:20Z https://swforum.seekye.com/post/13078/#p13078 <![CDATA[Re: DeviceList.Local.Changed not triggered on Linux without modifications]]> Just on the possibility that this is Platform Invoke related, would you mind trying:

In Platform\Linux\NativeMethods.cs

change

public static extern int poll(pollfd[] fds, IntPtr nfds, int timeout);

to

public static extern int poll([In][Out] pollfd[] fds, IntPtr nfds, int timeout);

]]> https://swforum.seekye.com/user/2/ 2019-07-15T14:34:36Z https://swforum.seekye.com/post/13077/#p13077 <![CDATA[Re: DeviceList.Local.Changed not triggered on Linux without modifications]]> `fds[0].revents` is always 0

So far I have only tested on x64, can try on ARM later.

]]> https://swforum.seekye.com/user/14241/ 2019-07-15T02:48:23Z https://swforum.seekye.com/post/13076/#p13076 <![CDATA[Re: DeviceList.Local.Changed not triggered on Linux without modifications]]> Hmm. I am not encountering this problem on Linux Mint 19. (Are you running 32 or 64-bit? Which architecture?)

"if (0 != (fds[0].revents & NativeMethods.pollev.IN))" runs in an endless loop? What is the value of fds[0].revents? Thanks!

]]> https://swforum.seekye.com/user/2/ 2019-07-13T13:52:57Z https://swforum.seekye.com/post/13075/#p13075 <![CDATA[Re: DeviceList.Local.Changed not triggered on Linux without modifications]]> So in my case revents always equals 0 in this check:

`if (0 != (fds[0].revents & NativeMethods.pollev.IN))`

And if I remove this check, all is fine.

Also note that once a device is connected this code is executed in an endless loop,

]]> https://swforum.seekye.com/user/14241/ 2019-07-12T02:56:47Z https://swforum.seekye.com/post/13074/#p13074 <![CDATA[Re: DeviceList.Local.Changed not triggered on Linux without modifications]]> Sorry to get back to this so late.
Was using my version so forgot about the issue.
Now I switched back to your latest version (since you solved some other issues)
and found that this issue still exists.

]]> https://swforum.seekye.com/user/14241/ 2019-07-12T02:46:31Z https://swforum.seekye.com/post/13073/#p13073 <![CDATA[Re: DeviceList.Local.Changed not triggered on Linux without modifications]]> Very odd. What is revents returning for you, then?
Also, is it blocking in poll in your version, or blocking in udev_monitor_receive_device? Thanks!

]]> https://swforum.seekye.com/user/2/ 2019-03-22T16:33:06Z https://swforum.seekye.com/post/13044/#p13044 <![CDATA[DeviceList.Local.Changed not triggered on Linux without modifications]]> Without modification `DeviceList.Local.Changed` does not get triggered on Ubuntu 18.04

Filename: `LinuxHidManager.cs`
Line: ~69

This is the code in the current version

if (0 != (fds[0].revents & (NativeMethods.pollev.ERR | NativeMethods.pollev.HUP | NativeMethods.pollev.NVAL))) { break; }                       
if (0 != (fds[0].revents & NativeMethods.pollev.IN))
{                                
    IntPtr device = NativeMethodsLibudev.Instance.udev_monitor_receive_device(monitor);
    if (device != null)
    {                                    
        NativeMethodsLibudev.Instance.udev_device_unref(device);
        DeviceList.Local.RaiseChanged();
    }
}

The following line never returns true:

if (0 != (fds[0].revents & NativeMethods.pollev.IN))

However, if I disable this check I get proper change notification and no exceptions.
Basically, the following version works:

if (ret == 1)
{

    if (0 != (fds[0].revents & (NativeMethods.pollev.ERR | NativeMethods.pollev.HUP | NativeMethods.pollev.NVAL))) { break; }                       

                                   
   IntPtr device = NativeMethodsLibudev.Instance.udev_monitor_receive_device(monitor);
    if (device != null)
    {                                    
        NativeMethodsLibudev.Instance.udev_device_unref(device);
        DeviceList.Local.RaiseChanged();
    }
   
}

Do you see any issue with this?

PS: Again, it would be really great if you had an official git repo for this, it is such a useful project.

]]> https://swforum.seekye.com/user/14241/ 2019-03-19T02:15:53Z https://swforum.seekye.com/post/13043/#p13043