How to understand the 3 lines of c code?

Question

 if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "|l", &flag) == FAILURE) {
  return;
 }

Especially what's ZEND_NUM_ARGS() TSRMLS_CC doing?

the short answer would be...read the documentation; see http://www.google.com/search?q=ZEND_NUM_ARGS%28%29 — Steven A. Lowe, Nov 16 '10 at 06:44
@Bolt I stand (sit, actually) corrected; which 10 seconds with the documentation available from google told me right after i clicked the add comment button [you guys are fast!] — Steven A. Lowe, Nov 16 '10 at 06:47
i expect this will be closed soon, since the OP has apparently expended no effort prior to posting, but i'll leave it alone...for now — Steven A. Lowe, Nov 16 '10 at 06:48

score 5 · Answer 1 · answered Nov 16 '10 at 06:47

5

It looks like TSRMLS_CC is a macro that might expand to nothing or it might expand to an extra argument with a comma thrown in there:

http://blog.golemon.com/2006/06/what-heck-is-tsrmlscc-anyway.html

answered Nov 16 '10 at 06:47

xscott

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score 4 · Answer 2 · answered Nov 16 '10 at 06:46

4

This Zend article says:

The bulk of the zend_parse_parameters() block will almost always look the same. ZEND_NUM_ARGS() provides a hint to the Zend Engine about the parameters which are to be retrieved, TSRMLS_CC is present to ensure thread safety

answered Nov 16 '10 at 06:46

codaddict

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Can you elaborate about `TSRMLS_CC` ? – ccr Nov 16 '10 at 06:50

score 1 · Answer 3 · answered Nov 16 '10 at 06:50

1

http://docstore.mik.ua/orelly/webprog/php/ch14_07.htm

answered Nov 16 '10 at 06:50

Andrew Cash

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score 0 · Answer 4 · answered Nov 16 '10 at 06:46

0

see http://www.hospedajeydominios.com/mambo/documentacion-manual_php-pagina-zend_arguments_retrieval.html

answered Nov 16 '10 at 06:46

How to understand the 3 lines of c code?

4 Answers4