int P4_Startup(void *notused) {
int pid;
USLOSS_Console("P4_Startup\n");
int result = Sys_Spawn("P5_Startup", P5_Startup, NULL, 4 * USLOSS_MIN_STACK, 4, &pid);
Sys_Wait(&pid,&result);
printf("P4 pid changed: %d\n", pid);
USLOSS_Console("P4_Finished\n");
return 0;
}
int P3_Startup(void *notused)
{
int pid;
USLOSS_Console("P3_Startup\n");
int result = Sys_Spawn("P4_Startup", P4_Startup, NULL, 4 * USLOSS_MIN_STACK, 3, &pid);
printf("P3 pid changedi(P4 pid): %d\n", pid);
Sys_Wait(&pid, &result);
Sys_DumpProcesses();
USLOSS_Console("P3_Finished\n");
return 0;
}
int P6_Startup(void *notused)
{
int pid;
USLOSS_Console("P6_Startup\n");
int result = Sys_Spawn("P7_Startup", P7_Startup, NULL, 4 * USLOSS_MIN_STACK, 5, &pid);
assert(result == 0);
Sys_Wait(&pid,&result);
int status = 4;
Sys_Terminate(status);
USLOSS_Console("P6_Finished\n");
return 0;
}
int
P4_Startup(void *arg)
{
int i;
int rc;
int pid;
int child;
int numChildren = sizeof(names) / sizeof(char *);
USLOSS_Console("P4_Startup starting.\n");
rc = Sys_VmInit(PAGES, PAGES, numChildren * PAGES, 1, (void **) &vmRegion);
if (rc != 0) {
USLOSS_Console("Sys_VmInit failed: %d\n", rc);
USLOSS_Halt(1);
}
pageSize = USLOSS_MmuPageSize();
for (i = 0; i < numChildren; i++) {
rc = Sys_Spawn(names[i], Child, (void *) names[i], USLOSS_MIN_STACK * 2, 2, &pid);
assert(rc == 0);
}
for (i = 0; i < numChildren; i++) {
rc = Sys_Wait(&pid, &child);
assert(rc == 0);
}
for (i = 0; i < numChildren; i++) {
rc = Sys_Spawn(names[i], Child, (void *) names[i], USLOSS_MIN_STACK * 2, 2, &pid);
assert(rc == 0);
}
for (i = 0; i < numChildren; i++) {
rc = Sys_Wait(&pid, &child);
assert(rc == 0);
}
Sys_VmDestroy();
USLOSS_Console("P4_Startup done.\n");
return 0;
}
int P3_Startup(void *arg) {
// Test 1
USLOSS_Console("Testing usage of semaphore\n");
USLOSS_Console("------------------------\n");
USLOSS_Console("Testing P3_Startup by itself\n");
int semaphore; // Necessary only because of args specified by function prototype
int handle = Sys_SemCreate(1, &semaphore);
assert(semaphore >= 0);
assert(handle == 0);
USLOSS_Console("Semaphore created with initial value 1\n");
int result = Sys_SemP(semaphore);
assert(result == 0);
USLOSS_Console("P3_Startup clears P on semaphore\n");
result = Sys_SemV(semaphore);
assert(result == 0);
USLOSS_Console("P3_Startup V's semaphore\n");
USLOSS_Console("Test cleared!\n");
USLOSS_Console("------------------------\n");
// Test 2
// Note that spawned proc has higher priority than P3_Startup
// to ensure that it P's and V's on the same semaphore
USLOSS_Console("Testing P3_Startup on mutex with another proc\n");
int pid;
result = Sys_Spawn("PatientProc1", PatientProc1, (void *) &semaphore, USLOSS_MIN_STACK, 2, &pid);
assert(pid != -1);
assert(result == 0);
result = Sys_SemP(semaphore);
assert(result == 0);
USLOSS_Console("P3_Startup clears P on semaphore again\n");
result = Sys_SemV(semaphore);
assert(result == 0);
USLOSS_Console("P3_Startup V's semaphore\n");
USLOSS_Console("Test cleared!\n");
USLOSS_Console("------------------------\n");
// Test 3
USLOSS_Console("Testing P3_Startup on semaphore with initial value 2 with another proc\n");
handle = Sys_SemCreate(2, &semaphore);
assert(semaphore >= 0);
assert(handle == 0);
USLOSS_Console("Semaphore created with initial value 2\n");
result = Sys_Spawn("PatientProc2", PatientProc2, (void *) &semaphore, USLOSS_MIN_STACK, 2, &pid);
assert(pid != -1);
assert(result == 0);
result = Sys_SemP(semaphore);
assert(result == 0);
USLOSS_Console("P3_Startup clears P on semaphore with initial value 2\n");
result = Sys_SemV(semaphore);
result = Sys_SemV(semaphore);
assert(result == 0);
USLOSS_Console("P3_Startup V's semaphore with initial value 2 twice\n");
USLOSS_Console("Test cleared!\n");
USLOSS_Console("------------------------\n");
USLOSS_Console("You passed the test! Treat yourself to a cookie!\n");
return 7;
}
