#include <os.h>
#include <rmon.h>
#include "corefunc.h"

/*
 * mesg1
 *
 * Tests for:
 *	osSendMesg
 *	osRecvMesg
 *
 * Assumed working:
 *	osGetIntMask
 *	osSetIntMask
 *	osCreateMesgQueue
 *	osCreateThread
 *	osStartThread
 *	osYieldThread
 *
 * Description:
 *	Check that osRecvMesg blocks when requested and there are no messages.
 *	Check that osSendMesg does not yield processor when blocked receiving
 *		thread has same priority as sender.
 */

#define	NUM_LOG		25
#define	MAX_MESSAGE	4

static void		slave(void *);
static int		logExecution(int);

static OSMesgQueue	mesgQueue;
static OSMesg		mesgBuf[MAX_MESSAGE];

static OSMesgQueue	slaveMesgQueue;
static OSMesg		slaveMesgBuf[1];

static OSThread		slaveThread;
static char		slaveStack[STACKSIZE];

static int		logTab[NUM_LOG];
static int		*logPtr = logTab;
static int		expLogTab[NUM_LOG] = {
	0, 1, 1, 0, 1, 1, 0, 1, 1, 0, 1, 1, 0, 1, 1,
	0, 1, 1, 1, 1, 1, 0, 0, 0, 0 		     };

int
mesg1(void)
{
    OSIntMask savedMask, currentMask;
    OSMesg expectedMesg, actualMesg;
    int i;
    int addFailures, numFailures = 0;
    
    savedMask = osSetIntMask(OS_IM_ALL);

    osCreateMesgQueue(&slaveMesgQueue, slaveMesgBuf, 1);

    osCreateThread(&slaveThread, 100, slave, (void *)0,
		   slaveStack+STACKSIZE, 10);
    osStartThread(&slaveThread);

    if (logExecution(0))
	numFailures++;

    osCreateMesgQueue(&mesgQueue, mesgBuf, MAX_MESSAGE);

    /*
     * Loop a number of times, blocking on the reception of a message that will
     * be sent by the slave.  Since the message queue is circular buffer,
     * looping at least one more than the size of the queue is an
     * interesting test.
     */

    for (i = 0; i < MAX_MESSAGE+1; i++) {
	expectedMesg = (OSMesg)((i<<24)|(i<<16)|(i<<8)|i);
	(void)osRecvMesg(&mesgQueue, &actualMesg, OS_MESG_BLOCK);

	if (logExecution(0))
	    numFailures++;

	if (expectedMesg != actualMesg) {
	    osSyncPrintf("mesg1: expected message 0x%x, actual 0x%x\n",
  		expectedMesg, actualMesg);
	    numFailures++;
	}
	currentMask = osGetIntMask();
	if (currentMask != OS_IM_ALL) {
	    osSyncPrintf("mesg1: expected interrupt mask 0x%x, actual 0x%x\n",
		OS_IM_ALL, currentMask);
	    numFailures++;
	}
    }

    /*
     * Loop again, receiving messages.  This time the slave will not
     * yield the processor, so only the first osRecvMesg will block.
     */

    for (i = 0; i < MAX_MESSAGE; i++) {
	expectedMesg = (OSMesg)((i<<24)|(i<<16)|(i<<8)|i);
	(void)osRecvMesg(&mesgQueue, &actualMesg, OS_MESG_BLOCK);

	if (logExecution(0))
	    numFailures++;

	if (expectedMesg != actualMesg) {
	    osSyncPrintf("mesg1: expected message 0x%x, actual 0x%x\n",
		expectedMesg, actualMesg);
	    numFailures++;
	}
	currentMask = osGetIntMask();
	if (currentMask != OS_IM_ALL) {
	    osSyncPrintf("mesg1: expected interrupt mask 0x%x, actual 0x%x\n",
		OS_IM_ALL, currentMask);
	    numFailures++;
	}
    }

    (void)osRecvMesg(&slaveMesgQueue, (OSMesg *)&addFailures, OS_MESG_BLOCK);
    numFailures += addFailures;

    /*
     * Verify everybody ran when they were supposed to.
     */
    if (logPtr != &logTab[NUM_LOG]) {
	osSyncPrintf("mesg1: log table underflow\n");
	numFailures++;
    }
    for (i = 0; i < logPtr - logTab; i++) {
	if (expLogTab[i] != logTab[i]) {
	    osSyncPrintf("mesg1: expected log id %d, actual %d at entry %d\n",
		expLogTab[i], logTab[i], i);
	    numFailures++;
	}
    }

    /*
     * Restore original interrupt mask and check it once more.
     */
    currentMask = osSetIntMask(savedMask);
    if (currentMask != OS_IM_ALL) {
	osSyncPrintf("mesg1: expected interrupt mask 0x%x, actual 0x%x\n",
		OS_IM_ALL, currentMask);
	numFailures++;
    }
    return(numFailures);
}

static void
slave(void *arg)
{
    OSIntMask currentMask;
    OSMesg expectedMesg;
    int i;
    int retValue;
    int numFailures = 0;

    if (logExecution(1))
	numFailures++;

    /*
     * Loop and send messages to the master, who is blocked waiting for it.
     * Then yield to allow the master to wait again.
     */
    for (i = 0; i < MAX_MESSAGE+1; i++) {
	expectedMesg = (OSMesg)((i<<24)|(i<<16)|(i<<8)|i);
	retValue = osSendMesg(&mesgQueue, expectedMesg, OS_MESG_NOBLOCK);

	if (logExecution(1))
	    numFailures++;

	if (retValue != 0) {
	    osSyncPrintf(
		"mesg1: expected osSendMesg return value %d, actual %d\n",
		0, retValue);
	    numFailures++;
	}
	currentMask = osGetIntMask();
	if (currentMask != OS_IM_ALL) {
	    osSyncPrintf("mesg1: expected interrupt mask 0x%x, actual 0x%x\n",
		OS_IM_ALL, currentMask);
	    numFailures++;
	}
	osYieldThread();

	if (logExecution(1))
	    numFailures++;
    }

    /*
     * Loop again, but this time do not yield the processor.
     */
    for (i = 0; i < MAX_MESSAGE; i++) {
	expectedMesg = (OSMesg)((i<<24)|(i<<16)|(i<<8)|i);
	retValue = osSendMesg(&mesgQueue, expectedMesg, OS_MESG_NOBLOCK);

	if (logExecution(1))
	    numFailures++;

	if (retValue != 0) {
	    osSyncPrintf(
		"mesg1: expected osSendMesg return value %d, actual %d\n",
		0, retValue);
	    numFailures++;
	}
	currentMask = osGetIntMask();
	if (currentMask != OS_IM_ALL) {
	    osSyncPrintf("mesg1: expected interrupt mask 0x%x, actual 0x%x\n",
		OS_IM_ALL, currentMask);
	    numFailures++;
	}
    }
    osSendMesg(&slaveMesgQueue, (OSMesg)numFailures, OS_MESG_BLOCK);
}

static int
logExecution(int id)
{

    if (logPtr >= &logTab[NUM_LOG]) {
	osSyncPrintf("mesg1: log table overflow\n");
	return(1);
    }
    /*
    osSyncPrintf("%d. log %d\n", logPtr-logTab, id);
     */
    *logPtr++ = id;
    return(0);
}