int waitDevice(int type, int unit, int *status) {
mailbox *mbox;
switch (type) {
case USLOSS_CLOCK_DEV :
mbox = &clockBox;
break;
case USLOSS_DISK_INT :
mbox = &diskBoxes[unit];
break;
case USLOSS_TERM_INT :
mbox = &termBoxes[unit];
break;
}
if (debugflag2 && DEBUG2) {
USLOSS_Console("waitDevice(): receiving from %d\n", mbox->mboxID);
}
//notify p1.c that there is another process waiting on a device, then receive/block
addProcess();
MboxReceive(mbox->mboxID, status, sizeof(long));
releaseProcess();
if (debugflag2 && DEBUG2) {
USLOSS_Console("waitDevice(): received %s from mailbox %d\n", status, mbox->mboxID);
}
if (isZapped()) {
return -1;
}
return 0;
}
int XXp1(char *arg)
{
int i, result;
char buffer[20];
int msgNum = 0;
USLOSS_Console("\nXXp1(): started\n");
for (i = 0; i < 8; i++) {
USLOSS_Console("\nXXp1(): conditionally sending message #%d ", msgNum);
USLOSS_Console("to mailbox %d\n", mbox_id);
sprintf(buffer, "hello there, #%d", msgNum);
result = MboxCondSend(mbox_id, buffer, strlen(buffer)+1);
USLOSS_Console("XXp1(): after conditional send of message ");
USLOSS_Console("#%d, result = %d\n", msgNum, result);
msgNum++;
}
MboxReceive(pause_mbox, NULL, 0); // should block on mail box
for (i = 0; i < 8; i++) {
USLOSS_Console("\nXXp1(): conditionally sending message #%d ", msgNum);
USLOSS_Console("to mailbox %d\n", mbox_id);
sprintf(buffer, "good-bye, #%d", i);
result = MboxCondSend(mbox_id, buffer, strlen(buffer)+1);
USLOSS_Console("XXp1(): after conditional send of message ");
USLOSS_Console("#%d, result = %d\n", msgNum, result);
msgNum++;
}
quit(-3);
return 0; /* so gcc will not complain about its absence... */
} /* XXp1 */
int Child1(char *arg)
{
int result;
USLOSS_Console("\n%s(): starting, blocking on a mailbox receive\n", arg);
result = MboxReceive(mailbox, NULL, 0);
USLOSS_Console("%s(): result = %d\n", arg, result);
return 1;
} /* Child1 */
int XXp2(char *arg)
{
int result;
char buffer[20];
result = MboxReceive(mbox_id, buffer, 20);
USLOSS_Console("%s(): after recv of message '%s', result = %d\n",
arg, buffer, result);
if (result == -3)
USLOSS_Console("%s(): zap'd by MboxReceive() call\n", arg);
quit(-3);
return 0;
} /* XXp2 */
int XXp2(char *arg)
{
char buffer[100];
int i, result;
USLOSS_Console("XXp2(): started\n");
for (i = 0; i <= 1; i++) {
USLOSS_Console("XXp2(): receiving message #%d from mailbox %d\n", i, mbox_id);
result = MboxReceive(mbox_id, buffer, 100);
USLOSS_Console("XXp2(): after receipt of message #%d, result = %d\n", i, result);
USLOSS_Console(" message = `%s'\n", buffer);
}
quit(-4);
return 0;
} /* XXp2 */
int XXp2(char *arg)
{
int result;
char buffer[20];
USLOSS_Console("%s(): receiving message from mailbox %d, msg_size = %d\n",
arg, mbox_id, strlen(buffer)+1);
result = MboxReceive(mbox_id, buffer, strlen(buffer)+1);
USLOSS_Console("%s(): after receive of message, result = %d\n",
arg, result);
if (result == -3)
USLOSS_Console("%s(): zap'd by MboxReceive() call\n", arg);
quit(-3);
return 0;
} /* XXp2 */