Hello,
I've some problems with ecore_main_fd_handler_add(). In my application
a pipe is used to synchronize the asynchronous data generation thread
and the GUI. It works great in 8 of 10 app running cases. In 2 of 10
cases I start the application but the callback function from
ecore_main_fd_handler_add() is never called, no matter how much bytes I
throw into the pipe.
Before I start to debug the ecore functions I hope someone could look
over my code and help me to find the bug (if existing).
Here is the code:
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <stdint.h>
#include <fcntl.h>
#include <Ecore.h>
#include <Evas.h>
#include <Ecore_Evas.h>
#include <Edje.h>
#include <stdbool.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <math.h>
#include <gps.h>
Ecore_Evas *ee;
Evas *evas;
Evas_Object *o_bg;
Evas_Object *o_edje;
Evas_Object *poly;
pthread_t gps_thread;
pthread_mutex_t gps_mutex = PTHREAD_MUTEX_INITIALIZER;
void resize_cb(Ecore_Evas *ee);
void print_help (char *app_name);
void gps_callback (struct gps_data_t *gps_data, char *buf, size_t len,
int level);
int _fd_dp_active(void *data, Ecore_Fd_Handler *fdh);
void dispatcher_init ();
void dispatcher_signal ();
struct _Dispatcher
{
int fd_read;
int fd_write;
void *data;
Ecore_Fd_Handler *fd_handler;
// callback function??
};
typedef struct _Dispatcher Dispatcher;
Dispatcher dp;
char edje_signal[13+3]; // holds up to 999 images; should be enough;
int main(int argc, char **argv)
{
Evas_Object *o;
int edje_w = 240;
int edje_h = 240;
char *theme;
struct stat stat_buf;
bool theme_default;
char theme_default_name[] = "../data/empass.edj";
struct gps_data_t *gpsData;
switch (argc)
{
case 1:
theme_default = !stat (theme_default_name, &stat_buf);
if (theme_default)
theme = theme_default_name;
else
print_help (argv[0]);
break;
case 2:
theme = argv[1];
break;
default:
print_help (argv[0]);
break;
}
gpsData = gps_open ("localhost", "2947");
if (gpsData)
{
gps_query (gpsData, "rw\n");
gps_query (gpsData, "j=1\n");
gps_set_callback (gpsData, &gps_callback, &gps_thread);
}
else
{
fprintf (stderr, "Warning: running without gpsd support!\n");
}
if (!ecore_init ())
{
fprintf (stderr, "Error while initializing Ecore!\n");
exit (1);
}
ecore_app_args_set(argc, (const char **)argv);
if (!ecore_evas_init ())
{
fprintf (stderr, "Error while initializing Ecore_Evas!\n");
exit (1);
}
if (!edje_init())
{
fprintf (stderr, "Error while initializing Evas!\n");
exit (1);
}
dispatcher_init ();
// TODO: warum geht Xrender auf dem Latop nicht?
/*if
(ecore_evas_engine_type_supported_get(ECORE_EVAS_ENGINE_XRENDER_X11))
ee = ecore_evas_xrender_x11_new(NULL, 0, 0, 0, edje_w, edje_h); else
{*/
if
(ecore_evas_engine_type_supported_get(ECORE_EVAS_ENGINE_SOFTWARE_X11))
ee = ecore_evas_software_x11_new(NULL, 0, 0, 0, edje_w, edje_h); //}
if (!ee)
{
if
(ecore_evas_engine_type_supported_get(ECORE_EVAS_ENGINE_SOFTWARE_FB))
ee = ecore_evas_fb_new(NULL, 270, edje_w, edje_h); if (!ee)
ee = ecore_evas_gl_x11_new(NULL, 0, 0, 0, edje_w, edje_h);
if (!ee)
{
fprintf(stderr, "Cannot create Canvas!\n");
exit(-1);
}
}
ecore_evas_shaped_set (ee, 1);
ecore_evas_title_set (ee, "empass");
//ecore_evas_borderless_set(ee, 1);
ecore_evas_sticky_set(ee, 1);
evas = ecore_evas_get(ee);
evas_image_cache_set(evas, 8192 * 1024);
evas_font_cache_set(evas, 512 * 1024);
o = evas_object_rectangle_add(evas);
evas_object_move(o, 0, 0);
evas_object_resize(o, edje_w, edje_h);
evas_object_color_set(o, 0, 0, 0, 0);
evas_object_focus_set(o, 1);
evas_object_show(o);
o_bg = o;
o = edje_object_add(evas);
edje_object_file_set(o, theme, "main");
evas_object_move(o, 0, 0);
evas_object_resize(o, edje_w, edje_h);
evas_object_show(o);
o_edje = o;
ecore_evas_callback_resize_set(ee, resize_cb);
ecore_evas_show(ee);
ecore_main_loop_begin();
edje_shutdown();
ecore_evas_shutdown();
ecore_shutdown();
return 0;
}
void dispatcher_init ()
{
int fd[2];
/* Create the file descriptors */
if (pipe(fd) == 0)
{
dp.fd_read = fd[0];
dp.fd_write = fd[1];
fcntl(dp.fd_read, F_SETFL, O_NONBLOCK);
dp.fd_handler = ecore_main_fd_handler_add (dp.fd_read,
ECORE_FD_READ,
_fd_dp_active,
&dp,
NULL, NULL);
ecore_main_fd_handler_active_set(dp.fd_handler, ECORE_FD_READ);
}
else
{
fprintf (stderr, "pipe() failed\n");
exit (1);
}
}
int _fd_dp_active (void *data, Ecore_Fd_Handler *fdh)
{
int fd;
int len;
char buf[1];
char edje_signal_local[13+3];
unsigned char *frame_data;
Dispatcher *dp;
printf ("asynchronous data arrived\n");
dp = data;
fd = ecore_main_fd_handler_fd_get(fdh);
// reads all events and use only one
while (read (fd, buf, sizeof (buf)) > 0);
pthread_mutex_lock (&gps_mutex);
strncpy (edje_signal_local, edje_signal, 13+3);
pthread_mutex_unlock (&gps_mutex);
edje_object_signal_emit (o_edje, edje_signal_local, "degree");
return 1;
}
void dispatcher_signal ()
{
write(dp.fd_write, "1", 2);
}
void gps_callback (struct gps_data_t *gps_data, char *buf, size_t len,
int level) {
struct gps_fix_t *gps_fix;
double track;
int track_part;
char *gps_buf[2];
gps_fix = &gps_data->fix;
track = gps_fix->track;
// test if track != NaN
track_part = (int) ceil (track); // use round()
// TODO: only update if new GPS position and direction!
// dangerous -> use sprintf and length check later!
pthread_mutex_lock (&gps_mutex);
sprintf (edje_signal, "signal_degree%.3d", track_part);
pthread_mutex_unlock (&gps_mutex);
printf ("degree: %s\n", edje_signal);
dispatcher_signal ();
printf ("Track: %f\n", track);
}
void print_help (char *app_name)
{
printf("Usage: %s <default.edj>\n", app_name);
exit(-1);
}
void resize_cb(Ecore_Evas *ee)
{
Evas_Coord x, y, w, h;
ecore_evas_geometry_get (ee, &x, &y, &w, &h);
if (w < h)
{
evas_object_resize(o_bg, w, w);
evas_object_resize(o_edje, w, w);
}
else
{
evas_object_resize(o_bg, h, h);
evas_object_resize(o_edje, h, h);
}
}
regards
Andreas
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