Parent topic: Interrupts

Writing interrupt handlers

Updated: October 28, 2024

Let's see how to set up interrupt handlers—the calls, the characteristics, and some strategies.

Attaching an interrupt handler
To attach to an interrupt source, you'd use either InterruptAttach() or InterruptAttachEvent().
Now that you've attached an interrupt
At this point, you've called either InterruptAttachEvent() or InterruptAttach().
Detaching an interrupt handler
When done with the ISR, we may wish to break the association between the ISR and the interrupt vector:
The flags parameter
The last parameter, flags, controls all kinds of things:
The interrupt service routine
Let's look at the ISR itself. In the first example, we'll look at using the InterruptAttach() function. Then, we'll see the exact same thing, except with InterruptAttachEvent().
ISR functions
The next issue we should tackle is the list of functions an ISR is allowed to call.

Related concepts

Interrupt handling (System Architecture)

Writing an Interrupt Handler (QNX Neutrino Programmer's Guide)

Related reference

InterruptAttachEvent()

InterruptAttach()

InterruptDetach()

InterruptDisable()

InterruptEnable()

InterruptHookIdle2()

InterruptHookTrace()

InterruptLock()

InterruptMask()

InterruptUnlock()

InterruptUnmask()

InterruptWait()

Parent topic: Interrupts