Thread safety issue in C++ extension module

Hi, I hope I am submitting this message to the correct list. I have a blocking issue on thread safety in our PHP extension module that we have developed at Saxonica called Saxon/C, which provides XSLT 2.0 and XQuery support in PHP. The extension is built in C++ using Zend module framework. The aplication is quite involved as it was cross-compiled from Java using Excelsior JET, with its own JVM. The JVM can only be accessed in one os process. The issue is I get some intermittent crashes in my php scripts, which I believe is due to more than one process accessing same JET JVM resource. It seems like my global objects are getting reused in another php request. I am wondering if someone could give me some advice on how to build the Saxon/C extension library to overcome this problem or just point me in the right direction. I have tried to follow some forum posts in regards to creating a TSRM layer but I am not getting very far with this. kind regards, -- O'Neil Delpratt Software Developer, Saxonica Limited Email: oneil@saxonica.com <mailto:oneil@saxonica.com> Tel: +44 118 946 5894 Web: http://www.saxonica.com Saxonica Community Site: http://dev.saxonica.com Saxonica Bug tracking System: https://saxonica.plan.io/