Apache 1.3, PHP and TSRM question

I am trying to port PHP and I am running into a problem with Apache 1.3. I am not familiar with the PHP language by itself and I am used to working at the O.S. level and so any help would be greatly appreciated. I tried to read through mailing list archives, the readmes, FAQs etc, but I couldn't find answer for this question: When PHP is loaded with Apache 1.3 and Apache is shutdown, PHP 4.2.2 crashes inside the routine _efree() called from bc_free_num(). I found the problem to be related to linked list corruption and on further investigation, suspected it to be a case of the thread calling bc_free_num() to be different from that of the thread that called bc_new_num(). I verfied this by enabling TSRM_DEBUG while building zend, which enables this detection in _efree(). I also set the tsrm_error_level to TSRM_ERROR_LEVEL_ERROR to enable dispalying of TSRM messages to the screen. And sure enough, I got an error message from _efree() from the following excerpt: #if defined(ZTS) && TSRM_DEBUG

    if (p->thread_id != tsrm_thread_id()) {
        tsrm_error(TSRM_ERROR_LEVEL_ERROR, "Memory block allocated at %s:(%d) on thread %x freed at %s:(%d) on thread %x, ignoring",
            p->filename, p->lineno, p->thread_id,
            __zend_filename, __zend_lineno, tsrm_thread_id());
        return;
    }

#endif I have ZTS defined thread support in Zend. I am not able to understand and appreciate all the details of the use of the macros to access the globals variables via AG(), CG() etc and from what I could figure out, ts_resource_ex()is some kind of thread specific data mechanism and would work only if threads are dedicated to PHP. I am not able to understand who is responsible for ensuring that the same thread gets used for a complete request - whether it is some thing that I need to do in Apache or whether I need to enable/disable something while compiling PHP. Any help would be greatly appreciated. Please copy me on your reply as well. Thanks in advance, S.R.