Removed c->single_connection flag.

The c->single_connection was intended to be used as lock mechanism
to serialize modifications of request object from several threads
working with client and upstream connections.  The flag is redundant
since threads in nginx have never been used that way.

4 files changed, 3 insertions, 9 deletions

diff --git a/src/core/ngx_connection.c b/src/core/ngx_connection.c
index c818114df..09ad15fcc 100644
--- a/src/core/ngx_connection.c
+++ b/src/core/ngx_connection.c
@@ -900,11 +900,9 @@ ngx_close_connection(ngx_connection_t *c)
     c->read->closed = 1;
     c->write->closed = 1;
 
-    if (c->single_connection) {
-        ngx_unlock(&c->lock);
-        c->read->locked = 0;
-        c->write->locked = 0;
-    }
+    ngx_unlock(&c->lock);
+    c->read->locked = 0;
+    c->write->locked = 0;
 
     ngx_mutex_unlock(ngx_posted_events_mutex);
 
diff --git a/src/core/ngx_connection.h b/src/core/ngx_connection.h
index 87fd08723..3daf2eee4 100644
--- a/src/core/ngx_connection.h
+++ b/src/core/ngx_connection.h
@@ -152,7 +152,6 @@ struct ngx_connection_s {
 
     unsigned            log_error:3;     /* ngx_connection_log_error_e */
 
-    unsigned            single_connection:1;
     unsigned            unexpected_eof:1;
     unsigned            timedout:1;
     unsigned            error:1;
diff --git a/src/http/ngx_http_request.c b/src/http/ngx_http_request.c
index ea053057b..7fe30e57d 100644
--- a/src/http/ngx_http_request.c
+++ b/src/http/ngx_http_request.c
@@ -554,7 +554,6 @@ ngx_http_init_request(ngx_event_t *rev)
         return;
     }
 
-    c->single_connection = 1;
     c->destroyed = 0;
 
 #if (NGX_HTTP_SSL)
diff --git a/src/http/ngx_http_upstream.c b/src/http/ngx_http_upstream.c
index 6a77f7f03..d3e9b55aa 100644
--- a/src/http/ngx_http_upstream.c
+++ b/src/http/ngx_http_upstream.c
@@ -1118,8 +1118,6 @@ ngx_http_upstream_connect(ngx_http_request_t *r, ngx_http_upstream_t *u)
 
     r->connection->log->action = "connecting to upstream";
 
-    r->connection->single_connection = 0;
-
     if (u->state && u->state->response_sec) {
         tp = ngx_timeofday();
         u->state->response_sec = tp->sec - u->state->response_sec;