Hi list!

I read the page http://www.qnx.co.jp/developers/docs/6.3.2/neutrino/prog/inthandler.html about interrupts. 

Then I adapted the given example to handle keyboard irq. 

But my system freezes.

//**********************************************************
#include <stdio.h>
#include <sys/neutrino.h>
#include <sys/syspage.h>
#include <semaphore.h>
#include <pthread.h>

#define IRQ1 1

struct sigevent event;
volatile unsigned counter;
sem_t end;

const struct sigevent *handler(void *area, int id) {
	printf("ID : %d\n", id);
	return(&event);
	
}
void * int_thread(void * cookie){
	int i;
	int id;
	// Request I/O privity
	
	ThreadCtl(_NTO_TCTL_IO, 0);
	// Initialize event structure
	printf("setting notification mode\n");
	event.sigev_notify = SIGEV_INTR;

	id=InterruptAttach(IRQ1, &handler, NULL, 0, 0 );
	for( i = 0; i < 10; ++i ) {
		InterruptWait( 0, NULL );
		printf( "key hit\n" );
		InterruptUnmask(IRQ1, id);
	}
	// Disconnect the ISR handler
	
	InterruptDetach(id);
	sem_post(&end);
	return NULL;
}

int main() {
	printf("application using irq1\n");
	sem_init(&end, NULL, 0);
	pthread_create(NULL, NULL, int_thread, NULL); 

	/*
	
	....
	
	*/

	sem_wait(&end);
	printf("normal termination...\n");

	return 0;
}
//*******************************************************

I also have a few questions.

1. If I need to manage with multiples interrupts source. Should I create one thread and one ISR per source. Or can I use
 one thread which will wait on many interrupts and then call the right ISR? If yes, how can I implement that?

2. In the handler function, the second parameter is "id", can someone explain me how the kernel informs this parameter?

Thanks,

Cédirc