Hi, You can either use cmsFLAGS_NOCACHE or uncomment CMS_DONT_USE_PTHREADS in lcms2.h
You can use the 1-pixel cache on multiple threads if wish so, but then you need some locking for the cache. Commenting out CMS_DONT_USE_PTHREADS does the trick. Regards Marti Quoting David Kantrowitz <kantrow...@diaginc.com>: > Hi! > > I'm trying out LCMS2 for a project. So far it's working nicely but I'd > like to speed up the application of a transform. My question is this: > Is it safe to create a single transform on the main thread and apply > it (via DoTransform) on multiple threads running concurrently? I'm > creating the transform with CreateMultiprofileTransform. > > If so, are there any settings I must use, such as #defines, to make > the operation thread-safe? > > If that cannot be done, and I have to have separate transforms for > each thread, what about the creation of the transforms? Can I do that > concurrently on separate threads, or is CreateMultiprofileTransform > also not thread-safe? If it is thread-safe, is there a performance > gain from doing so, or am I better off creating them sequentially on > one thread? > > Finally, if there is the ability to create the transforms > concurrently, do they _have_ to be created on the threads that use > them? And is there an advantage to setting a core affinity for each > one, or does that not matter? > > Thanks in advance. > > ------------------------------------------------------------------------------ > Nokia and AT&T present the 2010 Calling All Innovators-North America contest > Create new apps & games for the Nokia N8 for consumers in U.S. and Canada > $10 million total in prizes - $4M cash, 500 devices, nearly $6M in marketing > Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store > http://p.sf.net/sfu/nokia-dev2dev > _______________________________________________ > Lcms-user mailing list > Lcms-user@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/lcms-user > ------------------------------------------------------------------------------ Nokia and AT&T present the 2010 Calling All Innovators-North America contest Create new apps & games for the Nokia N8 for consumers in U.S. and Canada $10 million total in prizes - $4M cash, 500 devices, nearly $6M in marketing Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store http://p.sf.net/sfu/nokia-dev2dev _______________________________________________ Lcms-user mailing list Lcms-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/lcms-user
