Integrate TLDK with NGINX

Created a clone of nginx (from https://github.com/nginx/nginx)
to demonstrate and benchmark TLDK library integrated with real
world application.
A new nginx module is created and and BSD socket-like API is implemented
on top of native TLDK API.
Note, that right now only minimalistic subset of socket-like API is provided:
- accept
- close
- readv
- recv
- writev
so only limited nginx functionality is available for a moment.

Change-Id: Ie1efe9349a0538da4348a48fb8306cbf636b5a92
Signed-off-by: Mohammad Abdul Awal <mohammad.abdul.awal@intel.com>
Signed-off-by: Reshma Pattan <reshma.pattan@intel.com>
Signed-off-by: Remy Horton <remy.horton@intel.com>
Signed-off-by: Konstantin Ananyev <konstantin.ananyev@intel.com>

1 files changed, 90 insertions, 0 deletions

diff --git a/app/nginx/src/event/ngx_event_timer.h b/app/nginx/src/event/ngx_event_timer.h
new file mode 100644
index 0000000..be81b15
--- /dev/null
+++ b/app/nginx/src/event/ngx_event_timer.h
@@ -0,0 +1,90 @@
+
+/*
+ * Copyright (C) Igor Sysoev
+ * Copyright (C) Nginx, Inc.
+ */
+
+
+#ifndef _NGX_EVENT_TIMER_H_INCLUDED_
+#define _NGX_EVENT_TIMER_H_INCLUDED_
+
+
+#include <ngx_config.h>
+#include <ngx_core.h>
+#include <ngx_event.h>
+
+
+#define NGX_TIMER_INFINITE  (ngx_msec_t) -1
+
+#define NGX_TIMER_LAZY_DELAY  300
+
+
+ngx_int_t ngx_event_timer_init(ngx_log_t *log);
+ngx_msec_t ngx_event_find_timer(void);
+void ngx_event_expire_timers(void);
+ngx_int_t ngx_event_no_timers_left(void);
+
+
+extern ngx_rbtree_t  ngx_event_timer_rbtree;
+
+
+static ngx_inline void
+ngx_event_del_timer(ngx_event_t *ev)
+{
+    ngx_log_debug2(NGX_LOG_DEBUG_EVENT, ev->log, 0,
+                   "event timer del: %d: %M",
+                    ngx_event_ident(ev->data), ev->timer.key);
+
+    ngx_rbtree_delete(&ngx_event_timer_rbtree, &ev->timer);
+
+#if (NGX_DEBUG)
+    ev->timer.left = NULL;
+    ev->timer.right = NULL;
+    ev->timer.parent = NULL;
+#endif
+
+    ev->timer_set = 0;
+}
+
+
+static ngx_inline void
+ngx_event_add_timer(ngx_event_t *ev, ngx_msec_t timer)
+{
+    ngx_msec_t      key;
+    ngx_msec_int_t  diff;
+
+    key = ngx_current_msec + timer;
+
+    if (ev->timer_set) {
+
+        /*
+         * Use a previous timer value if difference between it and a new
+         * value is less than NGX_TIMER_LAZY_DELAY milliseconds: this allows
+         * to minimize the rbtree operations for fast connections.
+         */
+
+        diff = (ngx_msec_int_t) (key - ev->timer.key);
+
+        if (ngx_abs(diff) < NGX_TIMER_LAZY_DELAY) {
+            ngx_log_debug3(NGX_LOG_DEBUG_EVENT, ev->log, 0,
+                           "event timer: %d, old: %M, new: %M",
+                            ngx_event_ident(ev->data), ev->timer.key, key);
+            return;
+        }
+
+        ngx_del_timer(ev);
+    }
+
+    ev->timer.key = key;
+
+    ngx_log_debug3(NGX_LOG_DEBUG_EVENT, ev->log, 0,
+                   "event timer add: %d: %M:%M",
+                    ngx_event_ident(ev->data), timer, ev->timer.key);
+
+    ngx_rbtree_insert(&ngx_event_timer_rbtree, &ev->timer);
+
+    ev->timer_set = 1;
+}
+
+
+#endif /* _NGX_EVENT_TIMER_H_INCLUDED_ */