Hi Ravi, I would recommend instrumenting your code with some print statements to verify that your surfaces are locking/unlocking in the expected order.
Ben -----Original Message----- From: directfb-users-boun...@directfb.org [mailto:directfb-users-boun...@directfb.org] On Behalf Of Strelchun, Timothy Sent: Sunday, December 26, 2010 10:25 PM To: 'directfb-users@directfb.org' Subject: Re: [directfb-users] accessing the row Hi Ravi, >> DirectFBError [>surface->Lock( surface, >> (DFBSurfaceLockFlags)(DSLF_READ | DSLF_WRITE), &data, &pitch >)]: Resource is locked! >> Can you please help me to understand this phenomena? You will receive this error if you call Lock twice. Each surface Lock should be followed by a subsequent Unlock after you have finished using it and prior to subsequent Locks and/or other related IDirectFBSurface graphics operations on the surface. Timothy -- Timothy Strelchun CE Software Engineering Digital Home Group Intel Corporation >-----Original Message----- >From: directfb-users-boun...@directfb.org >[mailto:directfb-users-boun...@directfb.org] On Behalf Of >directfb-users-requ...@directfb.org >Sent: Saturday, December 25, 2010 3:00 AM >To: directfb-users@directfb.org >Subject: directfb-users Digest, Vol 70, Issue 22 > ... >Message: 1 >Date: Fri, 24 Dec 2010 16:39:24 +0530 >From: ravi <ravi...@gmail.com> >Subject: Re: [directfb-users] accessing the row >To: Chris Bore <chris_b...@yahoo.co.uk> >Cc: directfb-users@directfb.org >Message-ID: > <aanlktiksntrnox3x5f=mj1cxsce=259bjnwfuocdd...@mail.gmail.com> >Content-Type: text/plain; charset="iso-8859-1" > >Hello All, > Can anybody help me on this issue please? > >On Thu, Dec 23, 2010 at 3:43 PM, ravi <ravi...@gmail.com> wrote: > >> Thanks Chris. I've done that exercise. i implemented the >function like >> this: >> { >> >> surface->Lock(surface, DSLF_READ, &data, &pitch ); >> >> return (pointer *)data + pitch*row; >> >> } >> I'm unlocking the surface in a different function that caller will >> call after this function. >> running this function is aborting the program with this message...... >> >> DirectFBError [>surface->Lock( surface, >> (DFBSurfaceLockFlags)(DSLF_READ | DSLF_WRITE), &data, &pitch >)]: Resource is locked! >> Can you please help me to understand this phenomena? _______________________________________________ directfb-users mailing list directfb-users@directfb.org http://mail.directfb.org/cgi-bin/mailman/listinfo/directfb-users _______________________________________________ directfb-users mailing list directfb-users@directfb.org http://mail.directfb.org/cgi-bin/mailman/listinfo/directfb-users
