Backup of LT/PHP/GC(No. 3)

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- 1 (2010-05-09 (Sun) 11:48:17)
- 2 (2010-05-13 (Thu) 11:14:17)
- 3 (2010-05-14 (Fri) 19:06:19)

リファレンスカウントの実装について
ref_count について
```
debug_zval_dump で確認できる
```
copy on write について
- ref_count を利用

PHP 5.3 で循環参照用GC導入

http://php.net/manual/ja/features.gc.collecting-cycles.php

[~/php-5.3.0/Zend]% grep cycle  *_gc.c
                                gc_collect_cycles(TSRMLS_C);
                                gc_collect_cycles(TSRMLS_C);
ZEND_API int gc_collect_cycles(TSRMLS_D)

Backup of LT/PHP/GC (No. 3)