Improve resource management for curl handle

Previous implementation was using its own refcounting (uses field of
the php_curl struct). zend_list_add/remove already implements its own
refcount, so we don't need to use an other one.

Author: adoy

ext/curl/interface.c

@@ -1952,8 +1952,6 @@ PHP_FUNCTION(curl_init)
 	ch->handlers->read->method  = PHP_CURL_DIRECT;
 	ch->handlers->write_header->method = PHP_CURL_IGNORE;
 
-	ch->uses = 0;
-
 	MAKE_STD_ZVAL(clone);
 	ch->clone = clone;
 
@@ -1995,8 +1993,7 @@ PHP_FUNCTION(curl_copy_handle)
 	TSRMLS_SET_CTX(dupch->thread_ctx);
 
 	dupch->cp = cp;
-	dupch->uses = 0;
-	ch->uses++;
+	zend_list_addref(Z_LVAL_P(zid));
 	if (ch->handlers->write->stream) {
 		Z_ADDREF_P(ch->handlers->write->stream);
 	}
@@ -3210,11 +3207,7 @@ PHP_FUNCTION(curl_close)
 		return;
 	}
 
-	if (ch->uses) {
-		ch->uses--;
-	} else {
-		zend_list_delete(Z_LVAL_P(zid));
-	}
+	zend_list_delete(Z_LVAL_P(zid));
 }
 /* }}} */
 

ext/curl/multi.c

@@ -86,7 +86,6 @@ PHP_FUNCTION(curl_multi_add_handle)
 	ZEND_FETCH_RESOURCE(ch, php_curl *, &z_ch, -1, le_curl_name, le_curl);
 
 	_php_curl_cleanup_handle(ch);
-	ch->uses++;
 
 	/* we want to create a copy of this zval that we store in the multihandle structure element "easyh" */
 	tmp_val = *z_ch;
@@ -113,11 +112,7 @@ void _php_curl_multi_cleanup_list(void *data) /* {{{ */
 		return;
 	}
 
-	if (ch->uses) {	
-		ch->uses--;
-	} else {
-		zend_list_delete(Z_LVAL_P(z_ch));
-	}
+	zend_list_delete(Z_LVAL_P(z_ch));
 }
 /* }}} */
 
@@ -146,12 +141,12 @@ PHP_FUNCTION(curl_multi_remove_handle)
 	ZEND_FETCH_RESOURCE(mh, php_curlm *, &z_mh, -1, le_curl_multi_handle_name, le_curl_multi_handle);
 	ZEND_FETCH_RESOURCE(ch, php_curl *, &z_ch, -1, le_curl_name, le_curl);
 
-	--ch->uses;
 
+
+	RETVAL_LONG((long) curl_multi_remove_handle(mh->multi, ch->cp));
 	zend_llist_del_element( &mh->easyh, &z_ch, 
 							(int (*)(void *, void *)) curl_compare_resources );
-	
-	RETURN_LONG((long) curl_multi_remove_handle(mh->multi, ch->cp));
+
 }
 /* }}} */
 

ext/curl/php_curl.h

@@ -169,7 +169,6 @@ typedef struct {
 	CURL                    *cp;
 	php_curl_handlers       *handlers;
 	long                     id;
-	unsigned int             uses;
 	zend_bool                in_callback;
 	zval                     *clone;
 } php_curl;