the perform "state machine" is more explained now (b93a60da) · Commits · CYBER - Cyber Security / TS 103 523 MSP / TLMSP / TLMSP curl

lib/multi.c

+37 −4

Original line number	Diff line number	Diff line
		@@ -43,6 +43,7 @@ struct Curl_one_easy {

		CURL easy_handle; / this is the easy handle for this unit */
		CURLMstate state; /* the handle's state */
		CURLcode result; /* previous result */
		};


		@@ -193,7 +194,7 @@ CURLMcode curl_multi_fdset(CURLM *multi_handle,
		/* after the transfer is done, go DONE */
		break;
		}

		easy = easy->next; /* check next handle */
		}

		return CURLM_OK;
		@@ -209,30 +210,62 @@ CURLMcode curl_multi_perform(CURLM multi_handle, int running_handles)

		easy=multi->first.next;
		while(easy) {

		switch(easy->state) {
		case CURLM_STATE_INIT:
		/* init this transfer */
		easy->result = Curl_init(easy->easy_handle);
		/* after init, go CONNECT */
		if(CURLE_OK == easy->result)
		easy->state = CURLM_STATE_CONNECT;
		break;
		case CURLM_STATE_CONNECT:
		/* connect */
		easy->result = Curl_connect(easy->easy_handle);
		/* after connect, go DO */
		if(CURLE_OK == easy->result)
		easy->state = CURLM_STATE_DO;
		break;
		case CURLM_STATE_DO:
		/* Do the fetch or put request */
		easy->result = Curl_do(easy->easy_handle);
		/* after do, go PERFORM */
		if(CURLE_OK == easy->result)
		easy->state = CURLM_STATE_PERFORM;
		break;
		case CURLM_STATE_PERFORM:
		/* read/write data if it is ready to do so */
		easy->result = Curl_readwrite(easy->easy_handle, &done);
		/* after the transfer is done, go DONE */
		if(TRUE == done)
		easy->state = CURLM_STATE_DONE;
		break;
		case CURLM_STATE_DONE:
		/* post-transfer command */
		easy->result = Curl_done(easy->easy_handle);
		/* after we have DONE what we're supposed to do, go COMPLETED */
		if(CURLE_OK == easy->result)
		easy->state = CURLM_STATE_COMPLETED;
		break;
		case CURLM_STATE_COMPLETED:
		/* this is a completed transfer */
		/* this is a completed transfer, it is likely to still be connected */

		/* This node should be delinked from the list now and we should post
		an information message that we are complete. */
		break;
		}

		if((CURLM_STATE_COMPLETED != easy->state) &&
		(CURLE_OK != easy->result)) {
		/*
		* If an error was returned, and we aren't in completed now,
		* then we go to completed and consider this transfer aborted.
		*/
		easy->state = CURLM_STATE_COMPLETED;
		}

		easy = easy->next; /* operate on next handle */
		}
		return CURLM_OK;
		}

		CURLMcode curl_multi_cleanup(CURLM *multi_handle);