How to model endless-loop with states in UML-state-diagram

Frygreen

Dear readers, I have a endless loop, which has internal state. How can this be modelled with UML-State-Diagram?

static int state = 0;
void mySstateTest(void)
{
for(;;) {
DoSomeImportantAction();

    if ( 0 == state ) {
        if ( 1 == ReadSomeData() ) {
            state = 1;
        }
    }

    if ( 1 == state) {
        if ( 0 == ReadSomeData() ) {
            state = 0;
        }
    }

}

}

Is there a better place for asking this question Thank you

Lost User

Frygreen wrote:

Is there a better place for asking this question

We don't appear to have a forum dedicated to UML, so perhaps you could try the Quick Answers section.

Veni, vidi, abiit domum

jschell

Frygreen wrote:

How can this be modelled with UML-State-Diagram?

State 1 points to state 0. State 0 points to state 1.

Stefan_Lang

A bit hard without the ability to embed an image, but I'll try:

/*********\
* *
* state 0 *
* *
\*********/
| ^ ^
| | |
v no| |yes
/ \ | |
/ \ | |
R==1?>-+ |
\ / ^
\ / / \
V / \
| <R==0?>-+
| \ / |
|yes \ / no|
| V |
| ^ |
| | |
v | |
/*********\ |
* * |
* state 1 *<--+
* *
\*********/

Ok, the readability suffers a bit - sorry for the bleeding eyes ;)

GOTOs are a bit like wire coat hangers: they tend to breed in the darkness, such that where there once were few, eventually there are many, and the program's architecture collapses beneath them. (Fran Poretto)