http.c: Rely on select instead of tracking whether data was received

Since now select is used with the file descriptors of the http connections,
tracking whether data was received recently (and trying to read more in
that case) is no longer necessary. Instead, always call select and rely on
it to return as soon as new data can be read.
Signed-off-by: NMika Fischer <mika.fischer@zoopnet.de>
Helped-by: NJeff King <peff@peff.net>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

http.c

@@ -4,7 +4,6 @@
 #include "run-command.h"
 #include "url.h"
 
-int data_received;
 int active_requests;
 int http_is_verbose;
 size_t http_post_buffer = 16 * LARGE_PACKET_MAX;
@@ -98,13 +97,11 @@ size_t fwrite_buffer(char *ptr, size_t eltsize, size_t nmemb, void *buffer_)
 	struct strbuf *buffer = buffer_;
 
 	strbuf_add(buffer, ptr, size);
-	data_received++;
 	return size;
 }
 
 size_t fwrite_null(char *ptr, size_t eltsize, size_t nmemb, void *strbuf)
 {
-	data_received++;
 	return eltsize * nmemb;
 }
 
@@ -629,8 +626,6 @@ void step_active_slots(void)
 void run_active_slot(struct active_request_slot *slot)
 {
 #ifdef USE_CURL_MULTI
-	long last_pos = 0;
-	long current_pos;
 	fd_set readfds;
 	fd_set writefds;
 	fd_set excfds;
@@ -640,17 +635,9 @@ void run_active_slot(struct active_request_slot *slot)
 
 	slot->finished = &finished;
 	while (!finished) {
-		data_received = 0;
 		step_active_slots();
 
-		if (!data_received && slot->local != NULL) {
-			current_pos = ftell(slot->local);
-			if (current_pos > last_pos)
-				data_received++;
-			last_pos = current_pos;
-		}
-
-		if (slot->in_use && !data_received) {
+		if (slot->in_use) {
 #if LIBCURL_VERSION_NUM >= 0x070f04
 			long curl_timeout;
 			curl_multi_timeout(curlm, &curl_timeout);
@@ -1208,7 +1195,6 @@ static size_t fwrite_sha1_file(char *ptr, size_t eltsize, size_t nmemb,
 		git_SHA1_Update(&freq->c, expn,
 				sizeof(expn) - freq->stream.avail_out);
 	} while (freq->stream.avail_in && freq->zret == Z_OK);
-	data_received++;
 	return size;
 }
 

http.h

@@ -89,7 +89,6 @@ extern void step_active_slots(void);
 extern void http_init(struct remote *remote);
 extern void http_cleanup(void);
 
-extern int data_received;
 extern int active_requests;
 extern int http_is_verbose;
 extern size_t http_post_buffer;