Hi, Here's some additional info for http://httpd.apache.org/docs-2.0/developer/thread_safety.html as requested on the page.
The ImageMagick & pdflib docs claim that they are both thread safe. ImageMagick docs claim it is thread safe since version 5.2.2 http://www.cise.ufl.edu/depot/www/ImageMagick/www/Changelog.html PDFLib docs claim it is thread safe, changes.txt indicates it has been since version 1.91 http://www.pdflib.com/pdflib/features.html#programm and ---- pdflib-3.0/docs/changes.txt ---- V1.91 (June 18, 1999) ===================== Bug fixes and enhancements: ... - Removed the remaining non-const globals in the GIF module, thus making GIF processing thread-safe (p_gif.c, p_intern.h). - Adds multithreading for Win32 to the test bed (test/pdftest.c). This nicely demonstrates PDFlib's thread-safety. ... -- Travers Carter - Noggin - http://www.noggin.com.au/