Thread safety info - ImageMagick, pdflib

[Travers Carter <tc...@noggin.com.au>]

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/