lib: Demultiplex the fast path

The fast path will now use an incoming ring buffer per flow per
process. This necessitated the development of a new method for the
asynchronous io call, which is now based on an event queue system for
scalability (fqueue). The ipcpd's and tools have been updated to this
API.

1 files changed, 62 insertions, 0 deletions

diff --git a/include/ouroboros/fqueue.h b/include/ouroboros/fqueue.h
new file mode 100644
index 00000000..943d6510
--- /dev/null
+++ b/include/ouroboros/fqueue.h
@@ -0,0 +1,62 @@
+/*
+ * Ouroboros - Copyright (C) 2016
+ *
+ * Flow queues
+ *
+ *    Dimitri Staessens <dimitri.staessens@intec.ugent.be>
+ *    Sander Vrijders   <sander.vrijders@intec.ugent.be>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#ifndef OUROBOROS_FQUEUE_H
+#define OUROBOROS_FQUEUE_H
+
+#include <stdbool.h>
+#include <time.h>
+
+struct flow_set;
+
+struct fqueue;
+
+typedef struct flow_set flow_set_t;
+typedef struct fqueue fqueue_t;
+
+flow_set_t * flow_set_create();
+
+void         flow_set_destroy(flow_set_t * set);
+
+fqueue_t *   fqueue_create();
+
+void         fqueue_destroy(struct fqueue * fq);
+
+void         flow_set_zero(flow_set_t * set);
+
+int          flow_set_add(flow_set_t * set,
+                          int          fd);
+
+bool         flow_set_has(flow_set_t * set,
+                          int          fd);
+
+void         flow_set_del(flow_set_t * set,
+                          int          fd);
+
+int          fqueue_next(fqueue_t * fq);
+
+int          flow_event_wait(flow_set_t *            set,
+                             fqueue_t *              fq,
+                             const struct timespec * timeout);
+
+#endif /* OUROBOROS_SELECT_H */