On 31 Jul 2002, Jason T. Greene wrote:
> Instead of mutexing the entire interpreter to death, why don't you try
> creating multiple interpreters (each in a thread), and then come up with
> a sharing mechanism.
Sounds like duplication some other thing :)
Derick
> On Wed, 2002-07-31 at 03:57, Alan Knowles wrote:
> > Im looking at adding threading to php, (for the cgi/cli stuff)..
> >
> > The story so far:
> >
> > I've created an extension which diverts all zend_execute calls into the
> > extension -> phpthreads_execute.
> > this function is a copy of zend_execute with a few modifications
> > - to copy & restore things like EG(active_symbol_table);
> > - to malloc lock and unlock the execute loop and release on each opcode.
> >
> > I've started testing the phpthreads_create($callback); - it appears to
> > work ok, execept it segfaults on completion.. - trying to reduce
> > refcounts somewhere.
> >
> > The fireup code looks something like this..
> >
> > void phpthreads_create(void *ptr) {
> > zval myretval;
> > zval *callback = (zval *) ptr;
> >
> > if (!call_user_function( EG(function_table), NULL, callback,
> > &myretval, 0, NULL TSRMLS_CC )) {
> > zend_error(E_ERROR, "Problem Starting thread with
> > callback");
> > }
> >
> > pthread_exit(NULL);
> >
> >
> > }
> > /* {{{ proto string phpthreads_thread(string function)
> > Return a string to confirm that the module is compiled in */
> > PHP_FUNCTION(phpthreads_create)
> > {
> >
> > zval *callback;
> > pthread_t thread;
> >
> > if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "z",
> > &callback) == FAILURE) {
> > return;
> > }
> > pthread_create( &thread, NULL, (void *) phpthreads_create,
> > (void*) callback);
> > RETURN_TRUE;
> > }
> >
> > and the backtrace of the simple threaded test looks like this..
> > 0x08128f08 in _zval_ptr_dtor (zval_ptr=0x81b5ce8) at
> > /usr/src/php/php4/Zend/zend_execute_API.c:275
> > 275 (*zval_ptr)->refcount--;
> > (gdb) bt
> > #0 0x08128f08 in _zval_ptr_dtor (zval_ptr=0x81b5ce8) at
> > /usr/src/php/php4/Zend/zend_execute_API.c:275
> > #1 0x424ceba2 in ?? ()
> > #2 0x424c7c92 in ?? ()
> > #3 0x08130588 in zend_execute_scripts (type=8, retval=0x0,
> > file_count=3) at /usr/src/php/php4/Zend/zend.c:810
> > #4 0x08110abd in php_execute_script (primary_file=0x40006c71) at
> > /usr/src/php/php4/main/main.c:1398
> > #5 0x08110138 in php_module_shutdown () at
> > /usr/src/php/php4/main/main.c:1058
> > #6 0x2e325f43 in ?? ()
> >
> > does anyone want to suggest what might be missing - is it worth putting
> > this into pecl - and does someone what to lend a hand??
> >
> > regards
> > alan
> >
> >
> >
> >
> >
> >
> > --
> > PHP Development Mailing List <http://www.php.net/>
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> >
>
>
>
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