//added by Ying
int sys_shmem_count(void)
{
int page_number;
if (argint(0, &page_number) < 0)
return -1;
return shmem_count(page_number);
}
int
main(int argc, char *argv[])
{
void *ptr;
int n;
int i;
for (i = 0; i < 4; i++) {
ptr = shmem_access(i);
if (ptr == NULL) {
test_failed();
}
}
int pid = fork();
if (pid < 0) {
test_failed();
}
else if (pid == 0) {
for (i = 0; i < 4; i++) {
n = shmem_count(i);
if (n != 2) {
test_failed();
}
}
exit();
}
else {
wait();
}
test_passed();
exit();
}
int sys_shmem_count(void) {
int page_num;
// illegal page number
if(argint(0, &page_num) < 0)
return -1;
// call shmem_count in proc.c
return shmem_count(page_num);
}
int
main(int argc, char *argv[])
{
char *ptr;
int i;
char d, arr[6] = "CS537";
int pid = fork();
if (pid < 0) {
test_failed();
}
else if (pid == 0) {
// printf(1, "child shmem_counter before access: %d\n", shmem_count(3));
ptr = shmem_access(3);
if (ptr == NULL) {
test_failed();
}
for (i = 0; i < 5; i++) {
*(ptr+i) = arr[i];
printf(1, "write: %c\n", *(ptr+i));
}
for (i = 0; i < 5; i++) {
d = *(ptr+i);
printf(1, "read in child: %c\n", d);
}
// printf(1, "child shmem_counter after access: %d\n", shmem_count(3));
exit();
}
else {
wait();
// printf(1, "parent shmem_counter before access: %d\n", shmem_count(3));
ptr = shmem_access(3);
// printf(1, "parent shmem_counter after access: %d\n", shmem_count(3));
if (ptr == NULL) {
test_failed();
}
for (i = 0; i < 5; i++) {
printf(1, "read in parent: %c\n", *(ptr+i));
if (*(ptr+i) != arr[i]) {
printf(1, "%d\t%c\t%c\n", shmem_count(3), *(ptr+i), arr[i]);
test_failed();
}
}
}
test_passed();
exit();
}
