unix, windows: always update loop time

Fixes #846

Makefile.am

@@ -145,6 +145,7 @@ test_run_tests_SOURCES = test/blackhole-server.c \
                          test/test-list.h \
                          test/test-loop-handles.c \
                          test/test-loop-stop.c \
+                         test/test-loop-time.c \
                          test/test-multiple-listen.c \
                          test/test-mutexes.c \
                          test/test-osx-select.c \

src/unix/core.c

@@ -260,6 +260,9 @@ int uv_run(uv_loop_t* loop, uv_run_mode mode) {
   int r;
 
   r = uv__loop_alive(loop);
+  if (!r)
+    uv__update_time(loop);
+
   while (r != 0 && loop->stop_flag == 0) {
     UV_TICK_START(loop, mode);
 

src/win/core.c

@@ -273,6 +273,9 @@ int uv_run(uv_loop_t *loop, uv_run_mode mode) {
     poll = &uv_poll;
 
   r = uv__loop_alive(loop);
+  if (!r)
+    uv_update_time(loop);
+
   while (r != 0 && loop->stop_flag == 0) {
     uv_update_time(loop);
     uv_process_timers(loop);

test/test-list.h

@@ -25,6 +25,7 @@ TEST_DECLARE   (close_order)
 TEST_DECLARE   (run_once)
 TEST_DECLARE   (run_nowait)
 TEST_DECLARE   (loop_stop)
+TEST_DECLARE   (loop_update_time)
 TEST_DECLARE   (barrier_1)
 TEST_DECLARE   (barrier_2)
 TEST_DECLARE   (barrier_3)
@@ -251,6 +252,7 @@ TASK_LIST_START
   TEST_ENTRY  (run_once)
   TEST_ENTRY  (run_nowait)
   TEST_ENTRY  (loop_stop)
+  TEST_ENTRY  (loop_update_time)
   TEST_ENTRY  (barrier_1)
   TEST_ENTRY  (barrier_2)
   TEST_ENTRY  (barrier_3)

test/test-loop-time.c

@@ -0,0 +1,34 @@
+/* Copyright Joyent, Inc. and other Node contributors. All rights reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#include "uv.h"
+#include "task.h"
+
+
+TEST_IMPL(loop_update_time) {
+  uint64_t start;
+
+  start = uv_now(uv_default_loop());
+  while (uv_now(uv_default_loop()) - start < 1000)
+    ASSERT(0 == uv_run(uv_default_loop(), UV_RUN_NOWAIT));
+
+  return 0;
+}

uv.gyp

@@ -324,6 +324,7 @@
         'test/test-list.h',
         'test/test-loop-handles.c',
         'test/test-loop-stop.c',
+        'test/test-loop-time.c',
         'test/test-walk-handles.c',
         'test/test-watcher-cross-stop.c',
         'test/test-multiple-listen.c',