Re: Installing GTK Binary Packages Into MINGW on MS Windows Using Wascana and Eclipse
On Wed, Aug 18, 2010 at 8:07 PM, Peter Willis pwil...@aslenv.com wrote: Hello, I would like to use mingw to port and compile a simple GTK application under MS Windows. The download page for windows located at: http://www.gtk.org/download-windows.html recommends the mingw tool chain and contains tables of relevant packages as well as dependencies. I have downloaded the various required packages and dependencies marked 'Dev' on that page. What is unclear from any installation instructions I have been able to find is where and how to install these packages into mingw. Do I simply decompress the archives in the mingw directory hierarchy so that the files end up in the respective directories there? *or* Do I need to make separate hierarchies for each of the zip files and point GCC at the 'lib' and 'header' directories using '-L -l' and '-I -i' flags respectively? I've used GTK and glib with mingw for many years now, and I've always put mingw in c:\mingw and all the gtk stuff in c:\gtk. This works perfectly, and I usually also add some simple unix-ish tools such that I can mimic a unix system at a dos prompt. To make all include and linking simple I usually have a makefile that contains these lines: INCLUDE = -I/C/GTK/include $(shell pkg-config --cflags gtk+-2.0) LIBS = $(shell pkg-config --libs gtk+-2.0) ... or somthing similar depending on what I need. I would not recommend to put GTK and MinGW in the same directories! -Øystein ___ gtk-list mailing list gtk-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-list
Re: GThreads and GThreadPool help for a dummy
However back to my code: pool = g_thread_pool_new( my_calc, (gpointer) common, 8, FALSE, err ); for (i = 0; i n_tot; i++ ) g_thread_pool_push( pool, store[i], err ); g_thread_pool_free( pool, FALSE, TRUE ); Why doesn't the g_thread_pool_free function stop and wait for all threads. I really specify this to wait (the third parameter is wait_ and set TRUE). In my understanding this must then be a bug in glib. Should I fill in a bug report? Oh my! What a blunder. I got the parameters in my_calc() swapped. It then just returned without calculating anything. I fixed this, and it now seems to work. The documentation on this is a bit unclear, and may need some polishing, but there is no bug. Scaling is a bit strange though! I'm working on a box with 2 intel xeon quad core processors and would therefore expect to get a close linear speed up from 1 -8 threads. Here's the results: Threads execution time [sec] 1 14.38 2 11.73 3 7.59 4 6.42 5 5.89 6 14.91 7 33.94 8 35.00 Is it the mutex lock and unlock that gives all this overhead when there's many threads. I'll try splitting the array and see if that gives better scalability. -Øystein ___ gtk-list mailing list gtk-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-list
Re: GThreads and GThreadPool help for a dummy
2010/7/23 richard boaz ivor.b...@gmail.com: this is how i do it (not using pools), i have modified my code for your purposes, though it's probably wrong somewhere in the implementation details (i didn't even compile it), but i leave that to you. this is very easily generalizable to do any kind of background work on a list of items. Thanks for the code. I'll try it out. I think the pool code in glib works similar, except that it uses an asynchronous queue. However back to my code: pool = g_thread_pool_new( my_calc, (gpointer) common, 8, FALSE, err ); for (i = 0; i n_tot; i++ ) g_thread_pool_push( pool, store[i], err ); g_thread_pool_free( pool, FALSE, TRUE ); Why doesn't the g_thread_pool_free function stop and wait for all threads. I really specify this to wait (the third parameter is wait_ and set TRUE). In my understanding this must then be a bug in glib. Should I fill in a bug report? -Øystein ___ gtk-list mailing list gtk-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-list
Re: GThreads and GThreadPool help for a dummy
I tried, and the new problem is now: pool = g_thread_pool_new( my_calc, (gpointer) common, 8, FALSE, err ); for (i = 0; i n_tot; i++ ) g_thread_pool_push( pool, store[i], err ); g_thread_pool_free( pool, FALSE, TRUE ); When I run this code, it continues without waiting for the threads to complete. I expected that the g_thread_pool_free function would make it wait for all threads to complete before the program code continues, however it does not! How can I make it wait? (Yes, I added a static mutex in my_func. I'm convinced that I need it. ) -Øystein ___ gtk-list mailing list gtk-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-list
GThreads and GThreadPool help for a dummy
Hi, I'm not really experienced when it comes to threading, and GThreads is the thing I want to use, since (I assume) it's quite portable. I have a function that returns a gfloat and I call the function sequentially and accumulate the total. Like this: /* My sequential pseudo code */ data_t data[N_DATAPOINTS]; gfloat tot_err = 0.0f; guint i; fill_the_data_array( data ); for ( i = 0; i N_DATAPOINTS; i++ ) tot_err += calc_error( data[i] ); /* End of my sequential pseudo code */ I have the impression that this should be rather simple to thread for-loop. Since addition is commutative, I may not even need a mutex for the tot_err variable. Can anyone point me in the right direction? -Øystein ___ gtk-list mailing list gtk-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-list
