AMX 68000 User Manual download pdf (Page 74)

B-12

DAK

AMX 68000 Target Guide

Example #include "CJZZZ.H"

void CJ_CCPP dowork(struct cjxjbuf *jbp);

static struct cjxjbuf jumpbuffer;

#define STACKSIZE 512 /* Stack size (longs) */

#define STACKDIR 1 /* 0=grows up; 1=grows down */

static long newstack[STACKSIZE];

#if (STACKDIR == 1)

#define STACKP (&newstack[STACKSIZE - 1])

#else

#define STACKP newstack

#endif

void CJ_CCPP taskbody(void) {

if (cjcfjset(&jumpbuffer) == 0)

/* Switch to new stack and do work */

cjcfstkjmp(&jumpbuffer, STACKP,

(CJ_VPPROC)dowork);

/* Never returns to here */

/* Do work using original stack */

dowork(NULL);

}

void CJ_CCPP dowork(struct cjxjbuf *jbp) {

/* Do work */

/* If jump buffer provided, then use long jump to */

/* restore the original stack and return */

if (jbp != NULL)

cjcfjlong(jbp, 1);

}

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AMX 68000 User Manual Page 74