Implementing context switch or thread using hi-tech PIC C

[johncsl82]

hi....

is there any simple software context switch out there?
I try freertos, but the code kind of hard to understand.....

I need a simpler version like....

void t1() {...}
void t2() {...}

boolean contextSwitch(void (*t1)(), void (*t2)())
{
    //code goes here
    //like push all the context (i.e. register, variable, counter... etc etc) to stack
    
}

void main()
{
     while(1)
     {
            contextSwitch(&t1, &t2);
            contextSwitch(&t2, &t1);
     }

}

on the other hand, based on my research, if we implement context switch best to have multi-threading or threading...........

so if there any example, please reply...thank you

Thanks