int P2_Startup(void *notused)
{
int pid;
int state;
int status = 0;
USLOSS_Console("P2_Startup\n");
pid = P1_Fork("Child", Child, NULL, USLOSS_MIN_STACK, 3);
if (pid < 0) {
USLOSS_Console("Unable to fork child: %d\n", pid);
status = 1;
} else {
/*
* Child runs at priority 3, which is lower than ours. Part A is
* run-to-completion, so we should continue to run while the
* child waits.
*/
state = P1_GetState(pid);
if (state != 1) { // child should be ready
USLOSS_Console("Child is in invalid state: %d\n", state);
status = 1;
}
}
return status;
}
int Child(void *arg) {
int pid;
int state;
int status = 0;
USLOSS_Console("Child\n");
P1_DumpProcesses();
pid = P1_Fork("Grandchild", Grandchild, NULL, USLOSS_MIN_STACK, 2);
if (pid < 0) {
USLOSS_Console("Unable to fork child: %d\n", pid);
status = 1;
} else {
/*
* Grandchild runs at priority 2, which is higher than ours. Part A is
* run-to-completion, the grandchild should already have quit before
* we get here.
*/
// USLOSS_Console("Grandchild pid : %d,State=%d\n", pid,P1_GetState(pid));
state = P1_GetState(pid);
if (state != 3) { // grandchild should have quit
USLOSS_Console("Grandchild is in invalid state: %d\n", state);
status = 1;
}
}
return status;
}
int P2_Startup(void *notused)
{
USLOSS_Console("P2_Startup\n");
if (P1_GetPID() != 1) {
USLOSS_Console("Fail: id does not equal 1");
}
if (P1_GetState(1) != 0) {
USLOSS_Console("Fail: state is not running");
}
if (P1_GetState(0) != 1) {
USLOSS_Console("Fail: state of sentinel should be ready");
}
int result = P1_Kill(P1_GetPID());
if (result == -2) {
USLOSS_Console("PASS\n");
}
USLOSS_Console("P2_Finished\n");
return 0;
}