Add app to demo lifecycle using EFL_MAIN_EX

c-lifecycle/meson.build

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+project(
+  'efl-example-lifecycle', 'c',
+  version : '0.0.1',
+  default_options: [ 'c_std=gnu99', 'warning_level=2' ],
+  meson_version : '>= 0.38.0')
+
+add_global_arguments('-DHAVE_CONFIG_H=1', '-DHAVE_CONFIG=1', language: 'c')
+
+config_h = configuration_data()
+config_h.set_quoted('PACKAGE', meson.project_name())
+config_h.set_quoted('PACKAGE_VERSION', meson.project_version())
+config_h.set_quoted('PACKAGE_STRING', meson.project_name() + ' ' + meson.project_version())
+config_h.set_quoted('PACKAGE_NAME', meson.project_name())
+
+config_h.set_quoted('EFL_EO_API_SUPPORT', '1')
+config_h.set_quoted('EFL_BETA_API_SUPPORT', '1')
+
+eina = dependency('eina', version : '>=1.20.99')
+efl = dependency('efl', version : '>=1.20.99')
+elm = dependency('elementary', version : '>=1.20.99')
+
+inc = include_directories('.')
+subdir('src')
+
+configure_file(
+  output : 'config.h',
+  install : false,
+  configuration: config_h
+)

c-lifecycle/src/lifecycle_main.c

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+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <Eina.h>
+#include <Efl.h>
+#include <Elementary.h>
+
+/* 
+ * These are some helper methods for triggering lifecycle events for the purpose of this demo.
+ * efl_pause and efl_resume may never be called for your application, depending on your environment.
+ * This demo triggers them directly to show how you can respond.
+ */
+static void
+_method_delay_call(Efl_Event_Cb method, double delay, Efl_Loop *loop)
+{
+   efl_add(EFL_LOOP_TIMER_CLASS, loop, 
+           efl_event_callback_add(efl_added, EFL_LOOP_TIMER_EVENT_TICK, method, loop),
+           efl_loop_timer_interval_set(efl_added, delay));
+}
+
+static void
+_simulate_app_exit(void *data EINA_UNUSED, const Efl_Event *ev EINA_UNUSED)
+{
+   efl_exit(0);
+}
+
+static void
+_simulate_app_foreground(void *data, const Efl_Event *ev)
+{
+   Efl_Loop *loop = data;
+   efl_event_callback_call(loop, EFL_LOOP_EVENT_RESUME, NULL);
+   efl_del(ev->object);
+
+   _method_delay_call(_simulate_app_exit, 0.5, loop);
+}
+
+static void
+_simulate_app_background(void *data, const Efl_Event *ev)
+{
+   Efl_Loop *loop = data;
+   efl_event_callback_call(loop, EFL_LOOP_EVENT_PAUSE, NULL);
+   efl_del(ev->object);
+
+   _method_delay_call(_simulate_app_foreground, 1.0, loop);
+}
+/* end helper methods - what follows below is efl event handling that you can use in your apps. */
+
+EAPI void
+efl_pause(void *data EINA_UNUSED, const Efl_Event *ev EINA_UNUSED)
+{
+   printf("Lifecycle: paused\n");
+}
+
+EAPI void
+efl_resume(void *data EINA_UNUSED, const Efl_Event *ev EINA_UNUSED)
+{
+   printf("Lifecycle: resumed\n");
+}
+ 
+EAPI void
+efl_terminate(void *data EINA_UNUSED, const Efl_Event *ev EINA_UNUSED)
+{
+   printf("Lifecycle: terminated\n");
+}
+
+EAPI_MAIN void
+efl_main(void *data EINA_UNUSED, const Efl_Event *ev)
+{
+   printf("Lifecycle: launched\n");
+
+   // here we trigger the chain of simulated events to show how an app could respond to system lifecycle.
+   _method_delay_call(_simulate_app_background, 0.5, ev->object);
+}
+EFL_MAIN_EX()
+

c-lifecycle/src/meson.build

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+src = files([
+  'lifecycle_main.c',
+])
+
+deps = [eina, efl, elm]
+
+executable('efl_example_lifecycle', src,
+  dependencies : deps,
+  include_directories : inc,
+  install : true
+)
+