Re: Do I need to use rwlock?

["Ardhan Madras" <ajhwb knac com>]

Hi,

I don't know why you should have RWLOCK mechanism on your problem, but it is not 'safe' to update widget in 
other thread except the main thread, g_idle_add() may suitable for you. This called in the main thread and 
you can safely update any widget in this function. Please note the GSourceFunc return value, when you 
returning TRUE (not 0) or FALSE (0), see the documentation.

gboolean update_widget (void *data)
{
  /* do widget updating based on variables */
  return FALSE;
}

void* thread_func (void *data)
{
  /* variable manipulation */
  g_idle_add ((GSourceFunc) update_widget, NULL);
}


--- donglongchao 163 com wrote:

From: donglongchao <donglongchao 163 com>
To: gtk-app <gtk-app-devel-list gnome org>
Subject: Do I need to use rwlock?
Date: Thu, 11 Jun 2009 10:55:14 +0800 (CST)

Hi,all

I have two threads.The first one is in charge of change data,and the second one is in charge of refresh the 
GUI based on the data changed by the first thread.For example,the second one will make a "entry" sensitive if 
a bool variable is changed to be "true" by the first thread.
And what I want to know is that do I need to use rwlock(or something like that) when I use the same variable 
in both the two threads?If yes,I want to know whether  there is a better method to solve this problem?Because 
I need to refresh many many widgets based on many many variables.
 Will someone help me?Thanks a lot.

Wish you happy.
Dong Longchao
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