Re: gtk_label_set_text () BUG !?!?!?!??!?!?!??!!? ( N00b )

[Tristan Van Berkom <tristan van berkom gmail com>]

hm wrote:

> Hi !
>
>  I`m not quiet sure if my previous mail was sent, so I`ll try to write it once again.
> Lieven van der Heide wrote, that I should call all gtk functions from one thread. I`ve tried :
>
> 1. Created function in main program, that calls gtk_label_set_text (). The function takes string as a ( from <string> ) parameter, which is converted to c-language string by string. c_str ()
>
> 2. Thread function gets pointer to function from point 1. as a parameter, and when specific conditions arefulfilled, then the function from point 1. is beiung called ( by the pointer passed as an argument for thread function )
>
> Result : the same :/
>  
Because your not doing anything different.

> Any clues ? :) 
>  
Yes,
   please save yourself (and all of us) alot of effort by finding out 
the meaning
of threads, if you dont have a good understanding about threads, your 
program
will crash and lock up I garauntee it, you will also find yourself 
unable to properly
phrase questions about why its not working - because you havent figured out
the meaning of your questions yet.

Cheers,
                                 -Tristan

I'm not about to write a book here but here's a little hint to justify 
my rant:

   - Threads share data throughout the process address space, all data 
belongs
     to the 'program' or 'process', if you are currently executing 
thread B, then
     function calls from thread B will be run in thread B; regardless 
of in which
     object file the stub happened to be built in and linked from.

  - When you use an idle handler (g_idle_add()) to schedule an event in 
the mainloop,
    this will result in a write to a pipe() that is used to wakeup the 
GMainContext of
    the mainloop (usually in the main thread), again - regardless of 
what object file
    the idle handler was declared in - it will be run from the main 
thread of execution.