I have program that send files and i want to make a progress bar for it, but that progress bar just updated after the transferring complete,so i putted a gtk_events_pending() and gtk_main_iteration() functions in the sending loop to go back to the gtk main loop to update the progress bar but also it seems to not work here is a

EDIT: the send function is in a separated thread

snippet from my code

float Percent = 0.0 ;
float Interval = 0.0 ;

the sending function

 gint SendTheFile (  )

{


    char FileBlockBuffer[512];
    bzero(FileBlockBuffer, 512);  
    int FileBlockSize ;
    FILE * FilePointer ;
    int filesize = 0 ; 

    FilePointer = fopen(LocalFileName , "r");



    struct stat st;
    stat(LocalFileName, &st);
    filesize = st.st_size;


    Interval = (512 / (float)filesize) ;

    while((FileBlockSize = fread(FileBlockBuffer,sizeof(char),512,FilePointer))>0)

        {


            send(SocketDiscriptor , FileBlockBuffer , FileBlockSize,0);

            bzero(FileBlockBuffer, 512);

            Percent = Percent + Interval ;
            if (Percent > 1.0)Percent = 0.0;

            while(gtk_events_pending() )
                {
                     gtk_main_iteration();
                }


        } 

update progress bar function

gint UpdateProgressBar(gpointer data)

{

 gtk_progress_bar_set_fraction(GTK_PROGRESS_BAR(data),Percent);


}

updating progress bar in the main function

g_timeout_add(50,(GSourceFunc)UpdateProgressBar,SendFileProgressBar);