void
my_close(int fd)
{
lock_acquire(&filesys_lock);
struct thread *t = thread_current();
struct list_elem *e = list_begin(&t->file_list);
struct process_file *pf;
int count = 0;
while(e != list_end(&t->file_list)){
pf = list_entry (e, struct process_file, elem);
// khg : order is important
e = list_next(e);
if(fd == pf->fd || fd == CLOSE_ALL){
file_allow_write(pf->file);
file_close(pf->file);
list_remove(&pf->elem);
free(pf);
count++;
// khg : fd reset....
//(t->fd)--;
if(fd != CLOSE_ALL)
break;
}
}
lock_release(&filesys_lock);
if(count == 0 && fd != CLOSE_ALL)
my_exit(-1);
return;
}
/*! Closes FILE. */
void file_close(struct file *file) {
if (file != NULL) {
file_allow_write(file);
inode_close(file->inode);
free(file);
}
}
void
sys_exit (int status)
{
struct thread *t = thread_current();
int fd;
t->exit_code = status;
t->end = true;
for (fd=0; fd < t->fd_num; fd++){ // close all open fd
if (t->fd_list[fd] != NULL){
file_close(t->fd_list[fd]);
t->fd_list[fd] = 0;
}
}
printf("%s: exit(%d)\n", t->process_name, status);
sema_up (&t->wait_this);
//unblock parent
sema_down (&t->kill_this);
//kill_this will up when parent get exit_code succefully
file_allow_write (t->open_file);
file_close (t->open_file);
thread_exit();
}
void
thread_cleanup_and_exit (int status)
{
printf ("%s: exit(%d)\n", thread_name (), status);
/* close all open file descriptors */
struct thread *t = thread_current ();
struct list_elem *e;
/* close all the files opened and
free spaces allocated for the file list */
while (!list_empty (&t->file_list))
{
e = list_pop_back (&t->file_list);
struct file_elem *f_elem = list_entry (e, struct file_elem, elem);
file_close (f_elem->file);
free (f_elem);
}
/* free waited_children_list and children_list */
while (!list_empty (&t->children_list))
{
e = list_pop_back (&t->children_list);
struct child_elem *c_elem = list_entry (e, struct child_elem, elem);
// free children from the global exit_list
free_thread_from_exit_list (c_elem->pid);
free (c_elem);
}
while (!list_empty (&t->waited_children_list))
{
e = list_pop_back (&t->waited_children_list);
struct wait_child_elem *w_elem = list_entry (e, struct wait_child_elem, elem);
free (w_elem);
}
add_thread_to_exited_list (t->tid, status);
/* allow file write to executable */
if (t->exec_file)
{
file_allow_write (t->exec_file);
file_close (t->exec_file);
}
/* release all the locks that have not already been released */
while (!list_empty (&t->acquired_locks))
{
struct list_elem *e = list_front (&t->acquired_locks);
struct lock *l = list_entry (e, struct lock, elem);
lock_release (l);
}
/* wake parent up if its waiting on it */
struct thread *parent = get_thread (thread_current ()->parent_id);
if (parent) {
sema_up (&parent->waiting_on_child_exit_sema);
}
thread_exit ();
}
void exit_handler (int status) {
printf("%s: exit(%d)\n", &thread_current ()->name, status);
lock_acquire(&ref_count_lock);
struct p_data* parent = thread_current()->parent_data;
if (parent != NULL) {
parent->exit_status = status;
parent->child_thread = NULL;
sema_up(&parent->sema);
parent->ref_count--;
if (parent->cwd != NULL) {
dir_close(parent->cwd);
}
if (parent->ref_count == 0) {
thread_current()->parent_data = NULL;
free(parent);
}
}
if (thread_current()->cwd != NULL) {
dir_close(thread_current()->cwd);
}
/* iterate through children and remove this as their parent*/
struct list_elem* e;
struct list *childs = &thread_current()->child_processes;
for (e = list_begin(childs); e != list_end(childs); e = list_next(e)) {
struct p_data* child = list_entry(e, struct p_data, elem);
child->ref_count --;
list_remove(e);
if (child->ref_count == 0) {
struct thread *t = child->child_thread;
if (t != NULL) {
t->parent_data = NULL;
}
free(child);
}
}
struct list *files = &thread_current()->files;
for (e = list_begin(files); e != list_end(files); e = list_begin(files)) {
close_handler(list_entry(e, struct file_struct, elem)->fd);
}
struct file_struct *executable = thread_current()->executable;
if (executable != NULL) {
file_allow_write(executable->sys_file);
file_close(executable->sys_file);
thread_current()->executable = NULL;
free(executable);
}
lock_release(&ref_count_lock);
thread_exit();
}
/* Closes FILE. */
void
file_close (struct file *file)
{
if (file != NULL)
{
/* Close the directory if possible. */
if (file->inode->data.is_dir)
{
dir_close (file->opened_dir);
}
file_allow_write (file);
inode_close (file->inode);
free (file);
}
}
