efl_thread_4.c
//Compile with:
//gcc -o efl_thread_4 efl_thread_4.c -g `pkg-config --cflags --libs elementary`
#include <Elementary.h>
#include <pthread.h>
static Evas_Object *win = NULL;
static Evas_Object *rect = NULL;
struct info
{
double x, y;
};
static void my_thread_mainloop_code(void *data);
static pthread_t thread_id;
static pthread_mutex_t th_lock;
static int th_exit = 0;
// BEGIN - code running in my custom pthread instance
//
static void *
my_thread_run(void *arg)
{
double t = 0.0;
// inside the pthread function lets loop forever incrementing a time point
for (;;)
{
struct info *inf = malloc(sizeof(struct info));
int do_exit;
if (inf)
{
inf->x = 200 + (200 * sin(t));
inf->y = 200 + (200 * cos(t));
// now call a function in the mainloop and pass it our allocated
// data that it will free when it gets it
ecore_main_loop_thread_safe_call_async
(my_thread_mainloop_code, inf);
}
// and sleep and loop
usleep(1000);
t += 0.02;
// in case someone has asked us to cancel - then cancel this loop
// co-operatively (cancelling is co-operative)
pthread_mutex_lock(&th_lock);
do_exit = th_exit;
pthread_mutex_unlock(&th_lock);
if (do_exit) break;
}
return NULL;
}
//
// END - code running in my custom pthread instance
static void
my_thread_new(void)
{
pthread_attr_t attr;
pthread_mutex_init(&th_lock, NULL);
if (pthread_attr_init(&attr) != 0)
perror("pthread_attr_init");
if (pthread_create(&thread_id, &attr, my_thread_run, NULL) != 0)
perror("pthread_create");
}
static void
my_thread_mainloop_code(void *data)
{
struct info *inf = data;
evas_object_move(rect, inf->x - 50, inf->y - 50);
free(inf);
}
// just test cancelling the thread
static void
down(void *data, Evas *e, Evas_Object *obj, void *event_info)
{
pthread_mutex_lock(&th_lock);
th_exit = 1;
pthread_mutex_unlock(&th_lock);
}
// on window delete - cancel thread then delete window and exit mainloop
static void
del(void *data, Evas_Object *obj, void *event_info)
{
pthread_mutex_lock(&th_lock);
th_exit = 1;
pthread_mutex_unlock(&th_lock);
evas_object_del(obj);
elm_exit();
}
EAPI_MAIN int
elm_main(int argc, char **argv)
{
Evas_Object *o;
elm_policy_set(ELM_POLICY_QUIT, ELM_POLICY_QUIT_LAST_WINDOW_CLOSED);
win = elm_win_util_standard_add("efl-thread-4", "EFL Thread 4");
evas_object_smart_callback_add(win, "delete,request", del, NULL);
o = evas_object_rectangle_add(evas_object_evas_get(win));
evas_object_color_set(o, 50, 80, 180, 255);
evas_object_resize(o, 100, 100);
evas_object_show(o);
// new in the examples - we have a mouse down on the blue box cancel
// the thread
evas_object_event_callback_add(o, EVAS_CALLBACK_MOUSE_DOWN, down, NULL);
rect = o;
// create custom thread to do some "work on the side"
my_thread_new();
evas_object_resize(win, 400, 400);
evas_object_show(win);
elm_run();
pthread_mutex_lock(&th_lock);
th_exit = 1;
pthread_mutex_unlock(&th_lock);
return 0;
}
ELM_MAIN()