static int
handle_file_notifications (struct input_event *hold_quit)
{
BYTE *p = file_notifications;
FILE_NOTIFY_INFORMATION *fni = (PFILE_NOTIFY_INFORMATION)p;
const DWORD min_size
= offsetof (FILE_NOTIFY_INFORMATION, FileName) + sizeof(wchar_t);
struct input_event inev;
int nevents = 0;
/* We cannot process notification before Emacs is fully initialized,
since we need the UTF-16LE coding-system to be set up. */
if (!initialized)
{
notification_buffer_in_use = 0;
return nevents;
}
enter_crit ();
if (notification_buffer_in_use)
{
DWORD info_size = notifications_size;
Lisp_Object cs = intern ("utf-16le");
Lisp_Object obj = w32_get_watch_object (notifications_desc);
/* notifications_size could be zero when the buffer of
notifications overflowed on the OS level, or when the
directory being watched was itself deleted. Do nothing in
that case. */
if (info_size
&& !NILP (obj) && CONSP (obj))
{
Lisp_Object callback = XCDR (obj);
EVENT_INIT (inev);
while (info_size >= min_size)
{
Lisp_Object utf_16_fn
= make_unibyte_string ((char *)fni->FileName,
fni->FileNameLength);
/* Note: mule-conf is preloaded, so utf-16le must
already be defined at this point. */
Lisp_Object fname
= code_convert_string_norecord (utf_16_fn, cs, 0);
Lisp_Object action = lispy_file_action (fni->Action);
inev.kind = FILE_NOTIFY_EVENT;
inev.code = (ptrdiff_t)XINT (XIL ((EMACS_INT)notifications_desc));
inev.timestamp = GetTickCount ();
inev.modifiers = 0;
inev.frame_or_window = callback;
inev.arg = Fcons (action, fname);
kbd_buffer_store_event_hold (&inev, hold_quit);
if (!fni->NextEntryOffset)
break;
p += fni->NextEntryOffset;
fni = (PFILE_NOTIFY_INFORMATION)p;
info_size -= fni->NextEntryOffset;
}
}
notification_buffer_in_use = 0;
}
leave_crit ();
return nevents;
}
/* This is the callback function for arriving signals from
g_file_monitor. It shall create a Lisp event, and put it into
Emacs input queue. */
static gboolean
dir_monitor_callback (GFileMonitor *monitor,
GFile *file,
GFile *other_file,
GFileMonitorEvent event_type,
gpointer user_data)
{
Lisp_Object symbol, monitor_object, watch_object;
char *name = g_file_get_parse_name (file);
char *oname = other_file ? g_file_get_parse_name (other_file) : NULL;
/* Determine event symbol. */
switch (event_type)
{
case G_FILE_MONITOR_EVENT_CHANGED:
symbol = Qchanged;
break;
case G_FILE_MONITOR_EVENT_CHANGES_DONE_HINT:
symbol = Qchanges_done_hint;
break;
case G_FILE_MONITOR_EVENT_DELETED:
symbol = Qdeleted;
break;
case G_FILE_MONITOR_EVENT_CREATED:
symbol = Qcreated;
break;
case G_FILE_MONITOR_EVENT_ATTRIBUTE_CHANGED:
symbol = Qattribute_changed;
break;
case G_FILE_MONITOR_EVENT_PRE_UNMOUNT:
symbol = Qpre_unmount;
break;
case G_FILE_MONITOR_EVENT_UNMOUNTED:
symbol = Qunmounted;
break;
case G_FILE_MONITOR_EVENT_MOVED:
symbol = Qmoved;
break;
default:
goto cleanup;
}
/* Determine callback function. */
monitor_object = XIL ((intptr_t) monitor);
eassert (INTEGERP (monitor_object));
watch_object = assq_no_quit (monitor_object, watch_list);
if (CONSP (watch_object))
{
/* Construct an event. */
struct input_event event;
Lisp_Object otail = oname ? list1 (build_string (oname)) : Qnil;
EVENT_INIT (event);
event.kind = FILE_NOTIFY_EVENT;
event.frame_or_window = Qnil;
event.arg = list2 (Fcons (monitor_object,
Fcons (symbol,
Fcons (build_string (name),
otail))),
XCDR (watch_object));
/* Store it into the input event queue. */
kbd_buffer_store_event (&event);
}
/* Cleanup. */
cleanup:
g_free (name);
g_free (oname);
return TRUE;
}
