[Dev-luatex] Cron <luatex at boekplan> /var/www/luatex.org/www/bin/luatex-svn

Cron Daemon root at mail.boekplan.nl
Sun May 16 16:25:48 CEST 2010

r3689 | hhenkel | 2010-05-16 13:34:25 +0200 (Sun, 16 May 2010) | 12 lines
Changed paths:
   M /trunk/source/texk/web2c/luatexdir/image/epdf.h
   M /trunk/source/texk/web2c/luatexdir/image/pdftoepdf.cc
   M /trunk/source/texk/web2c/luatexdir/lua/lepdflib.cc

A check was missing, if a PDFDoc object from epdf.open() had not been
deleted meanwhile, so that all derived Lua variables (which are pointers
into the XPDF structure) would point to illegal addresses, causing a
segfault. The cleanest fix may be to use the luaL_ref() and luaL_unref()
mechanism with __gc, but that gets ugly, if the number of arguments for a
Lua accessor function differs; it would need to keep all references with
the variable. Instead (as a try, it may change) now a counter is used,
which increments always if anything happened to the PDFDoc (closing,
re-opening). By this counter it is assured that the PDFDoc object is
the same as long as any derived variable is used; else a Lua error is
generated. It't a bit tedious, bloating the code, but it seems to be fast.


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