core: Add a polling example

reference/c/core/src/core_poll.c

@@ -0,0 +1,66 @@
+#define EFL_EO_API_SUPPORT 1
+#define EFL_BETA_API_SUPPORT 1
+
+#include <stdio.h>
+
+#include <Eina.h>
+#include <Efl_Core.h>
+
+/*
+ * Efl Core Poll examples.
+ *
+ * This example sets up poll callbacks for LOW, MEDIUM and HIGH frequency events.
+ * We run for 30 seconds and print to stdout to show when each is called.
+ * Depending on your system this may not include any LOW frequency polls.
+ */
+
+Efl_Loop_Timer *_timer;
+
+// the poll callback for low frequency events
+static void
+_poll_low_cb(void *data EINA_UNUSED, const Efl_Event *event EINA_UNUSED)
+{
+   printf("L");
+}
+
+// the poll callback for medium frequency events
+static void
+_poll_med_cb(void *data EINA_UNUSED, const Efl_Event *event EINA_UNUSED)
+{
+   printf("M");
+}
+
+// the poll callback for high frequency events
+static void
+_poll_high_cb(void *data EINA_UNUSED, const Efl_Event *event EINA_UNUSED)
+{
+   printf(".");
+
+}
+
+// Our timer callback ticks at the specified interval to interrupt the polling
+static void
+_timer_cb(void *data EINA_UNUSED, const Efl_Event *event EINA_UNUSED)
+{
+   printf("\nTIMER: timer callback called, exiting.\n");
+
+   efl_del(_timer);
+   efl_exit(0);
+}
+
+EAPI_MAIN void
+efl_main(void *data EINA_UNUSED, const Efl_Event *ev EINA_UNUSED)
+{
+   Eo *loop = ev->object;
+
+   setbuf(stdout, NULL);
+   efl_event_callback_add(loop, EFL_LOOP_EVENT_POLL_LOW, _poll_low_cb, NULL);
+   efl_event_callback_add(loop, EFL_LOOP_EVENT_POLL_MEDIUM, _poll_med_cb, NULL);
+   efl_event_callback_add(loop, EFL_LOOP_EVENT_POLL_HIGH, _poll_high_cb, NULL);
+
+   _timer = efl_add(EFL_LOOP_TIMER_CLASS, loop,
+                    efl_loop_timer_interval_set(efl_added, 30));
+   efl_event_callback_add(_timer, EFL_LOOP_TIMER_EVENT_TICK, _timer_cb, NULL);
+}
+EFL_MAIN()
+

reference/c/core/src/meson.build

@@ -21,3 +21,10 @@ executable('efl_reference_core_idler',
   install : true
 )
 
+executable('efl_reference_core_poll',
+  files(['core_poll.c']),
+  dependencies : deps,
+  include_directories : inc,
+  install : true
+)
+