by Jason L Froebe on January 19, 2010, no comments
When I purchased Foundations of Qt Development (Expert’s Voice in Open Source) by Johan Thelin a few months back, I hoped to get to it right away but work and life diverted my attention. Today at lunch I dived into it. Even though I’m still going through chapter 1, I think I can give a [...]
by Jason L Froebe on January 12, 2010, 2 comments
I wrote a simple image viewer that will load a photo image into a Gtk.Image widget using a Gdk.Pixbuf. I then added a tool bar with four clickable icons. Zoom out, zoom in, fit to window and original size. All but the fit to window worked well. When I pulled the width and height from [...]
by Jason L Froebe on August 27, 2009, 14 comments
The following is MY perception of Sybase’s PowerBuilder: Years ago PowerBuilder was king. No one could touch it. It was relatively inexpensive. Microsoft’s Visual Basic matured and the Pascal based Borland’s Delphi was released. Then it fell and fall it did. As it was falling from the throne Sybase purchased Powersoft, makers of PowerBuilder. As [...]
by Jason L Froebe on May 10, 2007, no comments
I’ve written a C program that creates a 20GB file using O_DIRECT and O_ASYNC correctly. The trick to write to a file using O_DIRECT is that I have to align the buffer with respect to the memory block size. When I write a similar program using Perl, I receive the expected “System write error: Invalid [...]
by Jason L Froebe on May 10, 2007, no comments
I’m trying to create a file using O_DIRECT (direct I/O) but am running into a problem. If I run it as a normal user (me) I get error number 22 (invalid argument): ./dio bytes_read= 4096 write failed: Invalid argument bytes_read= 4096 write failed: Invalid argument bytes_read= 4096 write failed: Invalid argument bytes_read= 4096 write failed: [...]