Hello,
I had to change my edje GUI from a thread. After some help here I found
a way to do that with pipes. I've created some helper functions to easy
dispatch an GUI update from a thread. Perhaps it's usefull for anyone.
Maybe this functions or anything similar could be inserted in ecore for
easier use in threads.
ecore_dispatcher.c:
#include "ecore_dispatcher.h"
void dispatcher_init (Dispatcher *dp, int (dispatcher_async_handler) (void
*data, Ecore_Fd_Handler *fdh))
{
int fd[2];
Ecore_Fd_Handler *fd_handler;
/* 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);
fd_handler = ecore_main_fd_handler_add (dp->fd_read,
ECORE_FD_READ,
dispatcher_async_handler,
dp,
NULL, NULL);
ecore_main_fd_handler_active_set(fd_handler, ECORE_FD_READ);
}
else
{
fprintf (stderr, "pipe() failed\n");
exit (1);
}
}
void dispatcher_signal (Dispatcher *dp)
{
write(dp->fd_write, "1", 2);
}
ecore_dispatcher.h:
#ifndef ECORE_DISPATCHER
#define ECORE_DISPATCHER
#include <Ecore.h>
#include <unistd.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
struct _Dispatcher
{
int fd_read;
int fd_write;
};
typedef struct _Dispatcher Dispatcher;
void dispatcher_init (Dispatcher *dp, int (dispatcher_async_handler) (void
*data, Ecore_Fd_Handler *fdh));
void dispatcher_signal (Dispatcher *dp);
#endif // ECORE_DISPATCHER
Here is how I use it:
Dispatcher dp;
int main ()
{
dispatcher_init (&dp, dispatcher_async_handler);
...
return 1;
}
// this is my thread....
thread_func ()
{
...
dispatcher_signal (&dp);
...
}
int dispatcher_async_handler (void *data, Ecore_Fd_Handler *fdh)
{
int fd;
char buf[1];
char edje_signal_local[sizeof (edje_signal)];
Dispatcher *dp_local;
printf ("asynchronous data arrived\n");
dp_local = 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, sizeof (edje_signal));
pthread_mutex_unlock (&gps_mutex);
edje_object_signal_emit (o_edje, edje_signal_local, "degree");
return 1;
}
What do you think? Any comments?
regards
Andreas
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