feature: support socket in some block phase

Author: rainingmaster

Diff for: config

@@ -296,6 +296,7 @@ HTTP_LUA_SRCS=" \
             $ngx_addon_dir/src/ngx_http_lua_log_ringbuf.c \
             $ngx_addon_dir/src/ngx_http_lua_input_filters.c \
             $ngx_addon_dir/src/ngx_http_lua_pipe.c \
+            $ngx_addon_dir/src/event/ngx_http_lua_kqueue.c \
             "
 
 HTTP_LUA_DEPS=" \
@@ -355,6 +356,7 @@ HTTP_LUA_DEPS=" \
             $ngx_addon_dir/src/ngx_http_lua_log_ringbuf.h \
             $ngx_addon_dir/src/ngx_http_lua_input_filters.h \
             $ngx_addon_dir/src/ngx_http_lua_pipe.h \
+            $ngx_addon_dir/src/ngx_http_lua_event.h \
             "
 
 # ----------------------------------------

Diff for: src/event/ngx_http_lua_kqueue.c

@@ -0,0 +1,87 @@
+
+/*
+ * Copyright (C) Yichun Zhang (agentzh)
+ */
+
+
+#include <ngx_core.h>
+#include <ngx_event.h>
+#include <ngx_http.h>
+
+int                    ngx_lua_kqueue = -1;
+struct kevent          change_list[1];
+struct kevent          event_list[1];
+
+ngx_int_t
+ngx_http_lua_kqueue_init(ngx_conf_t *cf)
+{
+    if (ngx_lua_kqueue == -1) {
+        ngx_lua_kqueue = kqueue();
+
+        if (ngx_lua_kqueue == -1) {
+            ngx_conf_log_error(NGX_LOG_ALERT, cf, 0, "kqueue() failed");
+
+            return NGX_ERROR;
+        }
+    }
+
+    return NGX_OK;
+}
+
+
+void
+ngx_http_lua_kqueue_set_event(ngx_event_t *ev, ngx_int_t filter)
+{
+    struct kevent     *kev;
+    ngx_connection_t  *c;
+
+    c = ev->data;
+
+    kev = &change_list[0];
+
+    kev->ident = c->fd;
+    kev->filter = (short) filter;
+    kev->flags = EV_ADD|EV_ENABLE;
+    kev->udata = NGX_KQUEUE_UDATA_T ((uintptr_t) ev | ev->instance);
+}
+
+
+ngx_int_t
+ngx_http_lua_kqueue_process_events(ngx_http_request_t *r, ngx_msec_t timer)
+{
+    int               events;
+    struct timespec   ts;
+    ngx_event_t      *ev;
+    ngx_int_t         instance;
+    ngx_err_t         err;
+
+    ts.tv_sec = timer / 1000;
+    ts.tv_nsec = (timer % 1000) * 1000000;
+
+    events = kevent(ngx_lua_kqueue, change_list, 1, event_list, 1, &ts);
+
+    err = (events == -1) ? ngx_errno : 0;
+
+    if (err) {
+        ngx_log_error(NGX_LOG_ALERT, r->connection->log, err,
+                      "kevent() failed");
+
+        return NGX_ERROR;
+    }
+
+    if (events == 0) {
+        ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0,
+                      "kevent() returned no events without timeout");
+
+        return NGX_ERROR;
+    }
+
+    ev = (ngx_event_t *) event_list[0].udata;
+    instance = (uintptr_t) ev & 1;
+    ev = (ngx_event_t *) ((uintptr_t) ev & (uintptr_t) ~1);
+
+    ev->available = event_list[0].data;
+    ev->ready = 1;
+
+    return NGX_OK;
+}

Diff for: src/ngx_http_lua_event.h

@@ -0,0 +1,24 @@
+
+/*
+ * Copyright (C) Yichun Zhang (agentzh)
+ */
+
+
+#ifndef _NGX_HTTP_LUA_EVENT_H_INCLUDED_
+#define _NGX_HTTP_LUA_EVENT_H_INCLUDED_
+
+
+#include "ngx_http_lua_common.h"
+
+
+ngx_int_t ngx_http_lua_kqueue_init(ngx_conf_t *cf);
+
+void ngx_http_lua_kqueue_set_event(ngx_event_t *ev, ngx_int_t filter);
+
+ngx_int_t ngx_http_lua_kqueue_process_events(ngx_http_request_t *r,
+    ngx_msec_t timer);
+
+
+#endif /* _NGX_HTTP_LUA_EVENT_H_INCLUDED_ */
+
+/* vi:set ft=c ts=4 sw=4 et fdm=marker: */

Diff for: src/ngx_http_lua_module.c

@@ -31,6 +31,7 @@
 #include "ngx_http_lua_ssl_session_fetchby.h"
 #include "ngx_http_lua_headers.h"
 #include "ngx_http_lua_pipe.h"
+#include "ngx_http_lua_event.h"
 
 
 static void *ngx_http_lua_create_main_conf(ngx_conf_t *cf);
@@ -786,6 +787,11 @@ ngx_http_lua_init(ngx_conf_t *cf)
     cln->handler = ngx_http_lua_ngx_raw_header_cleanup;
 #endif
 
+    rc = ngx_http_lua_kqueue_init(cf);
+    if (rc == NGX_ERROR) {
+        return rc;
+    }
+
     if (lmcf->lua == NULL) {
         dd("initializing lua vm");