elput: add refcounting for seats/devices

ensure lifetimes persist through events

@fix

src/lib/elput/elput_evdev.c

@@ -1,5 +1,11 @@
 #include "elput_private.h"
 
+static void
+_seat_event_free(void *d, void *ev EINA_UNUSED)
+{
+   _udev_seat_destroy(d);
+}
+
 static void
 _seat_caps_update(Elput_Seat *seat)
 {
@@ -12,8 +18,9 @@ _seat_caps_update(Elput_Seat *seat)
    ev->keyboard_count = seat->count.kbd;
    ev->touch_count = seat->count.touch;
    ev->seat = seat;
+   seat->refs++;
 
-   ecore_event_add(ELPUT_EVENT_SEAT_CAPS, ev, NULL, NULL);
+   ecore_event_add(ELPUT_EVENT_SEAT_CAPS, ev, _seat_event_free, seat);
 }
 
 static void
@@ -25,7 +32,8 @@ _seat_frame_send(Elput_Seat *seat)
    if (!ev) return;
 
    ev->seat = seat;
-   ecore_event_add(ELPUT_EVENT_SEAT_FRAME, ev, NULL, NULL);
+   seat->refs++;
+   ecore_event_add(ELPUT_EVENT_SEAT_FRAME, ev, _seat_event_free, seat);
 }
 
 static void
@@ -1558,6 +1566,7 @@ _evdev_device_create(Elput_Seat *seat, struct libinput_device *device)
    edev = calloc(1, sizeof(Elput_Device));
    if (!edev) return NULL;
 
+   edev->refs = 1;
    edev->seat = seat;
    edev->device = device;
    edev->caps = 0;
@@ -1621,6 +1630,8 @@ void
 _evdev_device_destroy(Elput_Device *edev)
 {
    if (!edev) return;
+   edev->refs--;
+   if (edev->refs) return;
 
    if (edev->caps & ELPUT_DEVICE_CAPS_POINTER)
      _pointer_release(edev->seat);

src/lib/elput/elput_input.c

@@ -103,6 +103,7 @@ _udev_seat_create(Elput_Manager *em, const char *name)
    if (!eseat) return NULL;
 
    eseat->manager = em;
+   eseat->refs = 1;
 
    eseat->name = eina_stringshare_add(name);
    em->input.seats = eina_list_append(em->input.seats, eseat);
@@ -110,11 +111,14 @@ _udev_seat_create(Elput_Manager *em, const char *name)
    return eseat;
 }
 
-static void
+void
 _udev_seat_destroy(Elput_Seat *eseat)
 {
    Elput_Device *edev;
 
+   eseat->refs--;
+   if (eseat->refs) return;
+
    EINA_LIST_FREE(eseat->devices, edev)
      _evdev_device_destroy(edev);
 
@@ -170,6 +174,7 @@ _device_event_cb_free(void *data EINA_UNUSED, void *event)
         if (seat)
           seat->devices = eina_list_remove(seat->devices, ev->device);
 
+        ev->device->refs--;
         _evdev_device_destroy(ev->device);
      }
 
@@ -186,6 +191,7 @@ _device_event_send(Elput_Device *edev, Elput_Device_Change_Type type)
 
    ev->device = edev;
    ev->type = type;
+   edev->refs++;
 
    ecore_event_add(ELPUT_EVENT_DEVICE_CHANGE, ev, _device_event_cb_free, NULL);
 }

src/lib/elput/elput_private.h

@@ -189,6 +189,7 @@ struct _Elput_Touch
 
 struct _Elput_Seat
 {
+   int refs; //for events
    const char *name;
 
    struct
@@ -209,6 +210,7 @@ struct _Elput_Seat
 struct _Elput_Device
 {
    Elput_Seat *seat;
+   int refs; //for events
 
    uint32_t ow, oh;
 
@@ -289,4 +291,6 @@ extern Elput_Interface _logind_interface;
 void _keyboard_keymap_update(Elput_Seat *seat);
 void _keyboard_group_update(Elput_Seat *seat);
 
+
+void _udev_seat_destroy(Elput_Seat *eseat);
 #endif