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C/C++ API Documentation | 2025.2

# Signaler::DeleteOnIntr( void * )

Removes a function previously registered using `OnIntr()` from the list.

Virtual? | No |
Class | `Signaler` |
Arguments | `void *ptr` | Pointer to the data item with which the original function was registered
Returns | `void` |

## See also

`Signaler::OnIntr()` `Signaler::Intr()`

## Example

    #include <unistd.h>    // for sleep()
    #include <stdhdrs.h>
    #include <strbuf.h>
    #include <signaler.h>

    class MyClass
    {
        public:
        void         Set( StrPtr *d ) { data = *d; }
        const StrPtr *Get()           { return &data; }
        void         Identify()       { printf( "I'm %s\n", data.Text() ); }

        private:
        StrBuf       data;
    };

    static void InterruptHandler( void *p )
    {
        MyClass      *m = ( MyClass * )p;
        m->Identify();
    }

    int main( int argc, char **argv )
    {
        StrBuf   data;
        MyClass  *list[ 5 ];

        for ( int i = 1; i <= 5; i++ )
        {
            data.Set( "Object" );
            data << i;

            MyClass   *p = new MyClass;
            list[ i - 1 ] = p;

            p->Set( &data );

            signaler.OnIntr( InterruptHandler, (void *)p );
        }

        // Unregister Object 3
        signaler.DeleteOnIntr( list[ 2 ] );

        printf( "Hit ^C to fire the interrupt handler\n" );
        for ( ; ; )
            sleep( 60 );

        exit( 0 );
    }

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