[PHP-DEV] Garbage Collection!
Let's say I do: zval *newVar; MAKE_STD_ZVAL( newVar ); ZEND_SET_SYMBOL( EG(symbol_table), varKey, newVar ); and then I do: MAKE_STD_ZVAL( newVar ); ZEND_SET_SYMBOL( EG(symbol_table), varKey, newVar ); This will overwrite my orignal newVar, however, will the original newVar be garbaged collected or is this my responsibility now that I'm out of PHP land? Also if it is auto garbage collected, is there a way I can force garbage collection to run while I'm in a deep recursion? Cheers, Rob. -- .-. | Robert Cummings | :-`. | Webdeployer - Chief PHP and Java Programmer | :--: | Mail : mailto:[EMAIL PROTECTED] | | Phone : (613) 731-4046 x.109 | :--: | Website : http://www.webmotion.com | | Fax : (613) 260-9545 | `--' -- PHP Development Mailing List http://www.php.net/ To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP-DEV] Garbage Collection!
At 08:53 PM 5/17/2002, Robert Cummings wrote: Let's say I do: zval *newVar; MAKE_STD_ZVAL( newVar ); ZEND_SET_SYMBOL( EG(symbol_table), varKey, newVar ); and then I do: MAKE_STD_ZVAL( newVar ); ZEND_SET_SYMBOL( EG(symbol_table), varKey, newVar ); This will overwrite my orignal newVar, however, will the original newVar be garbaged collected or is this my responsibility now that I'm out of PHP land? Also if it is auto garbage collected, is there a way I can force garbage collection to run while I'm in a deep recursion? Whatever you register into the standard data structures, EG(symbol_table) included, is taken care of by the engine. In that case, the old value will be destroyed as soon as you replace it in the 2nd SET_SYMBOL call. Zeev -- PHP Development Mailing List http://www.php.net/ To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP-DEV] Garbage Collection!
Zeev Suraski wrote: At 08:53 PM 5/17/2002, Robert Cummings wrote: Let's say I do: zval *newVar; MAKE_STD_ZVAL( newVar ); ZEND_SET_SYMBOL( EG(symbol_table), varKey, newVar ); and then I do: MAKE_STD_ZVAL( newVar ); ZEND_SET_SYMBOL( EG(symbol_table), varKey, newVar ); This will overwrite my orignal newVar, however, will the original newVar be garbaged collected or is this my responsibility now that I'm out of PHP land? Also if it is auto garbage collected, is there a way I can force garbage collection to run while I'm in a deep recursion? Whatever you register into the standard data structures, EG(symbol_table) included, is taken care of by the engine. In that case, the old value will be destroyed as soon as you replace it in the 2nd SET_SYMBOL call. To be honest I'm passing the return_value into my recursion - is the same true of it? I ask because I watched my memory consumption climb to over 500MB and all I use is MAKE_STD_ZVAL( newVar ) and insert into some depth of the recursion initially stored into return_value for the calling function. My initial assumption was that indeed this stuff is garbage collected... but maybe I'm doing something wrong if this is collected at the moment of overwrite and I'm seeing such massive allocations using top. Cheers, Rob. -- .-. | Robert Cummings | :-`. | Webdeployer - Chief PHP and Java Programmer | :--: | Mail : mailto:[EMAIL PROTECTED] | | Phone : (613) 731-4046 x.109 | :--: | Website : http://www.webmotion.com | | Fax : (613) 260-9545 | `--' -- PHP Development Mailing List http://www.php.net/ To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP-DEV] Garbage Collection!
At 09:04 PM 5/17/2002, Robert Cummings wrote: To be honest I'm passing the return_value into my recursion Not sure what you mean by that - return_value is handled by the engine as soon as you return from your function implementation, if that's what you're asking. If you're using it internally, then you're responsible for it until you return from your code. Zeev -- PHP Development Mailing List http://www.php.net/ To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP-DEV] Garbage Collection!
Zeev Suraski wrote: At 09:04 PM 5/17/2002, Robert Cummings wrote: To be honest I'm passing the return_value into my recursion Not sure what you mean by that - return_value is handled by the engine as soon as you return from your function implementation, if that's what you're asking. If you're using it internally, then you're responsible for it until you return from your code. Well I'm creating a nested hash that I want to return ultimately, so at my first recursive step I pass return_value as the hash to be filled. However at various steps in the recursion I add elements to the hash that overwrite default values. So my question is whether during this recursive process does the garbage collector run when I overwrite a hash entry? Hope that clears things up. Cheers, Rob. -- .-. | Robert Cummings | :-`. | Webdeployer - Chief PHP and Java Programmer | :--: | Mail : mailto:[EMAIL PROTECTED] | | Phone : (613) 731-4046 x.109 | :--: | Website : http://www.webmotion.com | | Fax : (613) 260-9545 | `--' -- PHP Development Mailing List http://www.php.net/ To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP-DEV] Garbage Collection!
If you're adding elements to a hash you created using array_init(), and you're using the standard macros (which apparently you are) - then yes, the engine will take care of garbage collection for you. At 09:27 PM 5/17/2002, Robert Cummings wrote: Zeev Suraski wrote: At 09:04 PM 5/17/2002, Robert Cummings wrote: To be honest I'm passing the return_value into my recursion Not sure what you mean by that - return_value is handled by the engine as soon as you return from your function implementation, if that's what you're asking. If you're using it internally, then you're responsible for it until you return from your code. Well I'm creating a nested hash that I want to return ultimately, so at my first recursive step I pass return_value as the hash to be filled. However at various steps in the recursion I add elements to the hash that overwrite default values. So my question is whether during this recursive process does the garbage collector run when I overwrite a hash entry? Hope that clears things up. Cheers, Rob. -- .-. | Robert Cummings | :-`. | Webdeployer - Chief PHP and Java Programmer | :--: | Mail : mailto:[EMAIL PROTECTED] | | Phone : (613) 731-4046 x.109 | :--: | Website : http://www.webmotion.com | | Fax : (613) 260-9545 | `--' -- PHP Development Mailing List http://www.php.net/ To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP-DEV] Garbage Collection!
Zeev Suraski wrote: If you're adding elements to a hash you created using array_init(), and you're using the standard macros (which apparently you are) - then yes, the engine will take care of garbage collection for you. Thanks a lot, this is what I needed to know, I guess somehow I have allocation going on somewhere else. Cheers, Rob. -- .-. | Robert Cummings | :-`. | Webdeployer - Chief PHP and Java Programmer | :--: | Mail : mailto:[EMAIL PROTECTED] | | Phone : (613) 731-4046 x.109 | :--: | Website : http://www.webmotion.com | | Fax : (613) 260-9545 | `--' -- PHP Development Mailing List http://www.php.net/ To unsubscribe, visit: http://www.php.net/unsub.php
