On 2017-10-02 08:02+0100 p.d.rosenb...@gmail.com wrote:
Hi Alan
I haven't really en through that code, but yes I have been using t
and yes I'm happy for that cleanup to occur. The joy of git is that the code history is still here if needed.
So yes, feel free to clean up as you wish.
Well, I did one last check, and it turns out I got ahead of myself in making this request, but I do appreciate the keeness you share with me to get this code cleaned up as soon as warranted. But that time has not (quite) arrived yet. The issue I spotted that currently (for the current HEAD of master) has critically different results for -DPL_WXWIDGETS_IPC3=ON versus OFF is -locate mode for example 1. If you run examples/c/x01c -dev wxwidgets -locate on Linux you get a blank screen with both the above configurations which is a bug for both configurations. But now that I have looked further, if you click blindly on the location of one of the 4 subpages, you get some cursor position information printed to stdout for the -DPL_WXWIDGETS_IPC3=OFF case and eventually the screen is actually displayed for that case. In contrast for -DPL_WXWIDGETS_IPC3=ON there is no response to mouse clicks for a cursor position I know is in the right place, and therefore the code is apparently in an infinite loop which never displays anything other than a blank screen. Could you take a look at the above screen display issue, and also at why there is no response to mouse clicks in locate mode for just the -DPL_WXWIDGETS_IPC3=ON case? To familiarize yourself with how locate mode should work for this example, you should try other interactive devices as well. For example, examples/c/x01c -dev wingcc -locate and/or examples/c/x01c -dev wingdi -locate should give good locate mode results (which is that if the mouse [or some keyboard key if the driver supports keyboard clicking] is clicked when the cursor corresponds to one of the 4 viewports, the cursor position and other information is dumped to stdout; and if the mouse [or keyboard key] is clicked when the cursor corresponds to a location outside one of the 4 viewports, locate mode terminates, and then hitting the enter key will terminate the example.) I just checked, and the old wxwidgets device you can still get access to using -DOLD_WXWIDGETS=ON still builds and examples/c/x01c -dev wxwidgets -locate gives the good locate mode results (both with mouse clicks and keyboard key clicks) described above. [out of order]:
One question i did have though – I remember my code being set up
like a ring buffer, and you saying yours wasn't. But I presume it can still cope with large transfers bigger than the shared memory block? Yes, transferring large blocks of bytes in either direction is what two of the three semaphores control. This works without any timed waits at all. (The other semaphore controls use of the entire transfer method similar to your mutex). My speed tests showed that method of transferring bytes stopped being significantly dependent on shared memory buffer size as soon as that shared memory size (+ a small overhead) was 1KB or greater. So to be absolutely safe concerning efficiency I set it to 10KB (+ a small overhead). See the note concerning PL_SHARED_ARRAY_SIZE in drivers/wxwidgets_comms.h. That value is significantly smaller than the ring buffer size which is set to 1024K (in drivers/wxwidgets_dev.cpp) for the case when PL_WXWIDGETS_IPC3 is not #defined. Alan __________________________ Alan W. Irwin Astronomical research affiliation with Department of Physics and Astronomy, University of Victoria (astrowww.phys.uvic.ca). Programming affiliations with the FreeEOS equation-of-state implementation for stellar interiors (freeeos.sf.net); the Time Ephemerides project (timeephem.sf.net); PLplot scientific plotting software package (plplot.sf.net); the libLASi project (unifont.org/lasi); the Loads of Linux Links project (loll.sf.net); and the Linux Brochure Project (lbproject.sf.net). __________________________ Linux-powered Science __________________________ ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Plplot-devel mailing list Plplot-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/plplot-devel
