Glib(2) MainLoop, timeout and thread

這個範例展示如何使用多線程，包含timeout function及thread function。

thread.c

#include <stdio.h>
#include <glib.h>
#include <stdio.h>

#define G_THREADS_ENABLED  //use multi-thread safe

gboolean TimerFunc (gpointer data)
{
  printf ("Timeout: %s\n\n",(char *)data);
  return TRUE;
}

gpointer ThreadFunc (gpointer data)
{
  int i;
  for (i = 0; i < 10; i++)
    {
      g_print("Thread: %s\n", (char *)data);
      g_usleep(500000);
    }
  return NULL;
}

int main ()
{
  GMainLoop *loop;
 
/* Either the thread system is initialized or, if no thread system is available in GLib , the program will abort */
  if (!g_thread_supported ())
    {
      g_thread_init (NULL);
    }
 
/* Creates a new GMainLoop structure. */
  loop = g_main_loop_new (NULL,FALSE);
  
/* This function creates a new thread with the default priority.
   GThread * g_thread_create(GThreadFunc func, gpointer data,
                             gboolean joinable, GError **error); */  
  g_thread_create(ThreadFunc, "Running", FALSE, NULL);
 
/* Sets a function to be called at regular intervals.
  guint g_timeout_add(guint interval, GSourceFunc function, gpointer data);*/
  g_timeout_add(2000, TimerFunc, ".......");
   
/* Runs a main loop until g_main_loop_quit() is called on the loop. */  
  g_main_loop_run(loop);
 
  return 0;
}

這次compile 要再加上 gthread-2.0 library，執行的結果如下:

sh-3.2# ./thread
Thread: Running
Thread: Running
Thread: Running
Thread: Running
Timeout: .......

Thread: Running
Thread: Running
Thread: Running
Thread: Running
Timeout: .......

Thread: Running
Thread: Running
Timeout: .......

Timeout: .......

Timeout: .......

ThreadFunc()執行完後會自行結束。