C#•2mo ago

WaitOne for EventWaitHandle makes program crash without error?

im using mutex and some events to sending some data to other program, but my program crashes completely after bool a = attachEvent0.WaitOne(waitTime); without any errors. it doesn't run the codes after :/ btw when the attachEvent0 is already signaled(turned on?), it works well without crashing,,,

14 Replies

Omnissiah•2mo ago

can you catch that exception with a try/catch?

try{
  bool b=nutex.WaitOne(waitTime);
  bool a=attachEvent0.WaitOne(waitTime);
  ...
}catch(Exception e)
{}

try{
  bool b=nutex.WaitOne(waitTime);
  bool a=attachEvent0.WaitOne(waitTime);
  ...
}catch(Exception e)
{}

시큐우•2mo ago

i tried already but nothing was catched

Omnissiah•2mo ago

then i guess you sould look in event viewer to have details on the error

시큐우•2mo ago

you mean this? https://learn.microsoft.com/en-us/visualstudio/profiling/events-viewer?view=vs-2022

Use the generic Events Viewer to diagnose your app - Visual Studio ...

Learn about the generic events viewer, which helps you better diagnose how your app is doing within the Visual Studio profiler.

Omnissiah•2mo ago

i mean eventvwr.msc, or "Event Viewer" if you search it in the system applications (which yes is related to that)

시큐우•2mo ago

ok i see :bap:

Omnissiah•2mo ago

if it's really an uncatchable exception the source then is outside the framework, and so it could potentially be a pretty difficult error to decipher

Unknown User•2mo ago

Message Not Public

Omnissiah•2mo ago

btw i don't if it's strecthed but it's a weird font there's some pretty weird kerning too

시큐우•2mo ago

i think there's nothing releated to this error,,?

Unknown User•2mo ago

Message Not Public

시큐우•2mo ago

var mutex = new Mutex(false, "TestShareMutex", out bool createdNew);
var commEvent0 = new EventWaitHandle(false, EventResetMode.ManualReset, "TestEvent0");
var attachEvent = new EventWaitHandle(false, EventResetMode.ManualReset, "TestAttachEvent");
if (!createdNew)
{
    mutex.WaitOne();
}
int waitTime = 9000000;

if (mutex.WaitOne(waitTime))
{
    attachEvent.Set();
    mutex.ReleaseMutex();
    bool b = mutex.WaitOne(waitTime);
    bool a = attachEvent0.WaitOne(waitTime);
    System.Diagnostics.Debug.WriteLine(a.ToString());
    Thread.Sleep(800);
    if (a && b)
    {
        mutex.ReleaseMutex();
    }
}

var mutex = new Mutex(false, "TestShareMutex", out bool createdNew);
var commEvent0 = new EventWaitHandle(false, EventResetMode.ManualReset, "TestEvent0");
var attachEvent = new EventWaitHandle(false, EventResetMode.ManualReset, "TestAttachEvent");
if (!createdNew)
{
    mutex.WaitOne();
}
int waitTime = 9000000;

if (mutex.WaitOne(waitTime))
{
    attachEvent.Set();
    mutex.ReleaseMutex();
    bool b = mutex.WaitOne(waitTime);
    bool a = attachEvent0.WaitOne(waitTime);
    System.Diagnostics.Debug.WriteLine(a.ToString());
    Thread.Sleep(800);
    if (a && b)
    {
        mutex.ReleaseMutex();
    }
}

i've seen all the logs in the same timestamp when i runned the program, but doesnt seem to be there

Omnissiah•2mo ago

is there any log with this process name? anyway there is no attachEvent0 declaration there

시큐우•2mo ago

i could find the process name only for some previous runtime errors that i already solved and the attachEvent0 is same as attachEvent but just different name

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WaitOne for EventWaitHandle makes program crash without error?