/* * (C) Finite State Machine Labs Inc. 2000 business@fsmlabs.com * * Released under the terms of GPL 2. * Open RTLinux makes use of a patented process described in * US Patent 5,995,745. Use of this process is governed * by the Open RTLinux Patent License which can be obtained from * www.fsmlabs.com/PATENT or by sending email to * licensequestions@fsmlabs.com */#include <stdio.h>#include <errno.h>#include <string.h>#include <rtlinux_signal.h>float marker = 0;volatile float *marker_ptr = &marker;void handler(int unused){	*marker_ptr = .5;	*marker_ptr += .25;}int main(void){	struct rtlinux_sigaction sig, oldsig;	rtlinux_sigset_t myset, oldset;	/* setup for a test of floating point */	sig.sa_handler = handler;	sig.sa_flags = RTLINUX_SA_ONESHOT;	sig.sa_period = NSECS_PER_SEC / 4;	/* install our handler for oneshot */	if (rtlinux_sigaction(RTLINUX_SIGTIMER0, &sig, &oldsig)) {		perror("rtlinux_sigaction");		return errno;	}	/* wait for the _handler_ to go off plus a bit extra in case	 * oneshot is messing up and becoming periodic	 */	sleep(2);	if (marker != (0.75))		fprintf(stderr, "marker is %f\n", marker);	/* free the timer */	sig.sa_handler = RTLINUX_SIG_IGN;	if (rtlinux_sigaction(RTLINUX_SIGTIMER0, &sig, &oldsig)) {		perror("rtlinux_sigaction");		return errno;	}	return 0;}