[Octave-bug-tracker] [bug #44463] Print command for "pdflatexstandalone" device produces output that doesn't compile

[Pantxo Diribarne]

Follow-up Comment #7, bug #44463 (project octave):

I could check that gl2ps is run in the gui thread: actually it is called by
Canvas::print which is run in the gui thread, hence the race condition (the
interpreter tries to read a file that still doesn't exist).

I have spent time on this bug but still can't understand why drawnow returns
before the print_figure has actually completed and unlocked the gh_manager
mutex. 

FTR, I have tried a nasty trick: created a new method
int base_graphics_toolkit::safe_print (same, args, as, print_figure). The only
difference with print_figure is the return argument: Fdrawnow has to wait for
the return value before completing. This works (at least this bug disappears )
but doesn't explain why the mutex method does not work.

FTR  I used the value of "pthread_self()" cast as a uint16 to track the
running threads.

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