libmicrohttpd

commit 47fdebac4b2a16ef84ef96e11ebdc2b1d1310fd8
parent eba022ce02aef76fd7d4babed1ce248d50427112
Author: Evgeny Grin (Karlson2k) <k2k@narod.ru>
Date:   Wed,  8 Feb 2017 22:33:29 +0300

Rewrote epoll handling: handle all connections instead of drying last active

Diffstat:
M
src/microhttpd/connection.c
 | 
47
++---------------------------------------------
M
src/microhttpd/daemon.c
 | 
39
++++++++++++++++++++++++++++++++-------
M
src/microhttpd/internal.h
 | 
3
+++

3 files changed, 37 insertions(+), 52 deletions(-)
diff --git a/src/microhttpd/connection.c b/src/microhttpd/connection.c
@@ -3227,52 +3227,9 @@ MHD_connection_handle_idle (struct MHD_Connection *connection)
   MHD_connection_update_event_loop_info (connection);
 #ifdef EPOLL_SUPPORT
   if (0 != (daemon->options & MHD_USE_EPOLL))
-    {
-      switch (connection->event_loop_info)
-        {
-        case MHD_EVENT_LOOP_INFO_READ:
-          if ( (0 != (connection->epoll_state & MHD_EPOLL_STATE_READ_READY)) &&
-               (0 == (connection->epoll_state & MHD_EPOLL_STATE_SUSPENDED)) &&
-               (0 == (connection->epoll_state & MHD_EPOLL_STATE_IN_EREADY_EDLL)) )
-            {
-              EDLL_insert (daemon->eready_head,
-                           daemon->eready_tail,
-                           connection);
-              connection->epoll_state |= MHD_EPOLL_STATE_IN_EREADY_EDLL;
-            }
-          break;
-        case MHD_EVENT_LOOP_INFO_WRITE:
-          if ( (0 != (connection->epoll_state & MHD_EPOLL_STATE_WRITE_READY)) &&
-               (0 == (connection->epoll_state & MHD_EPOLL_STATE_SUSPENDED)) &&
-               (0 == (connection->epoll_state & MHD_EPOLL_STATE_IN_EREADY_EDLL)) )
-            {
-              EDLL_insert (daemon->eready_head,
-                           daemon->eready_tail,
-                           connection);
-              connection->epoll_state |= MHD_EPOLL_STATE_IN_EREADY_EDLL;
-            }
-          break;
-        case MHD_EVENT_LOOP_INFO_BLOCK:
-          /* we should look at this connection again in the next iteration
-             of the event loop, as we're waiting on the application */
-          if ( (0 == (connection->epoll_state & MHD_EPOLL_STATE_IN_EREADY_EDLL) &&
-                (0 == (connection->epoll_state & MHD_EPOLL_STATE_SUSPENDED))) )
-            {
-              EDLL_insert (daemon->eready_head,
-                           daemon->eready_tail,
-                           connection);
-              connection->epoll_state |= MHD_EPOLL_STATE_IN_EREADY_EDLL;
-            }
-          break;
-        case MHD_EVENT_LOOP_INFO_CLEANUP:
-          /* This connection is finished, nothing left to do */
-          break;
-        }
-    }
-  return MHD_connection_epoll_update_ (connection);
-#else
+    return MHD_connection_epoll_update_ (connection);
+#endif /* EPOLL_SUPPORT */
   return MHD_YES;
-#endif
 }
 
 
diff --git a/src/microhttpd/daemon.c b/src/microhttpd/daemon.c
@@ -2900,6 +2900,15 @@ MHD_get_timeout (struct MHD_Daemon *daemon,
       return MHD_YES;
     }
 #endif /* HTTPS_SUPPORT */
+#ifdef EPOLL_SUPPORT
+  if ( (0 != (daemon->options & MHD_USE_EPOLL)) &&
+       (NULL != daemon->eready_head) )
+    {
+	  /* Some connection(s) already have some data pending. */
+      *timeout = 0;
+      return MHD_YES;
+    }
+#endif /* EPOLL_SUPPORT */
 
   have_timeout = MHD_NO;
   earliest_deadline = 0; /* avoid compiler warnings */
@@ -3685,6 +3694,7 @@ MHD_epoll (struct MHD_Daemon *daemon,
 #endif /* HTTPS_SUPPORT && UPGRADE_SUPPORT */
   struct MHD_Connection *pos;
   struct MHD_Connection *next;
+  struct MHD_Connection *prev;
   struct epoll_event events[MAX_EVENTS];
   struct epoll_event event;
   int timeout_ms;
@@ -3887,16 +3897,31 @@ MHD_epoll (struct MHD_Daemon *daemon,
     (void) resume_suspended_connections (daemon);
 
   /* process events for connections */
-  while (NULL != (pos = daemon->eready_tail))
+  prev = daemon->eready_tail;
+  while (NULL != (pos = prev))
     {
-      EDLL_remove (daemon->eready_head,
-		   daemon->eready_tail,
-		   pos);
-      pos->epoll_state &= ~MHD_EPOLL_STATE_IN_EREADY_EDLL;
+	  prev = pos->prevE;
+	  /* FIXME: use (0 != pos->epoll_state & MHD_EPOLL_STATE_READ_READY) ? MHD_YES : MHD_NO
+	   * and (0 != pos->epoll_state & MHD_EPOLL_STATE_WRITE_READY) ? MHD_YES : MHD_NO */
       call_handlers (pos,
-                     MHD_EVENT_LOOP_INFO_READ == pos->event_loop_info,
-                     MHD_EVENT_LOOP_INFO_WRITE == pos->event_loop_info,
+                     (MHD_EVENT_LOOP_INFO_READ == pos->event_loop_info) ? MHD_YES : MHD_NO,
+                     (MHD_EVENT_LOOP_INFO_WRITE == pos->event_loop_info) ? MHD_YES : MHD_NO,
                      MHD_NO);
+      if (MHD_EPOLL_STATE_IN_EREADY_EDLL ==
+            (pos->epoll_state & (MHD_EPOLL_STATE_SUSPENDED | MHD_EPOLL_STATE_IN_EREADY_EDLL)))
+        {
+          if ( (MHD_EVENT_LOOP_INFO_READ == pos->event_loop_info &&
+                  0 == (pos->epoll_state & MHD_EPOLL_STATE_READ_READY) ) ||
+               (MHD_EVENT_LOOP_INFO_WRITE == pos->event_loop_info &&
+                 0 == (pos->epoll_state & MHD_EPOLL_STATE_WRITE_READY) ) ||
+               MHD_EVENT_LOOP_INFO_CLEANUP == pos->event_loop_info)
+            {
+              EDLL_remove (daemon->eready_head,
+                           daemon->eready_tail,
+                           pos);
+              pos->epoll_state &= ~MHD_EPOLL_STATE_IN_EREADY_EDLL;
+            }
+        }
     }
 
   /* Finally, handle timed-out connections; we need to do this here
diff --git a/src/microhttpd/internal.h b/src/microhttpd/internal.h
@@ -884,16 +884,19 @@ struct MHD_Connection
 
   /**
    * Handler used for processing read connection operations
+   * @sa #MHD_connection_handle_read, #MHD_tls_connection_handle_read
    */
   int (*read_handler) (struct MHD_Connection *connection);
 
   /**
    * Handler used for processing write connection operations
+   * @sa #MHD_connection_handle_write, #MHD_tls_connection_handle_write
    */
   int (*write_handler) (struct MHD_Connection *connection);
 
   /**
    * Handler used for processing idle connection operations
+   * @sa #MHD_connection_handle_idle, #MHD_tls_connection_handle_idle
    */
   int (*idle_handler) (struct MHD_Connection *connection);