Change initial DTLS retransmission timer from 1 second to 50ms.

webrtc/base/timeutils.cc

 /*
  *  Copyright 2004 The WebRTC Project Authors. All rights reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 20 matching lines @@
 namespace rtc {
 
 ClockInterface* g_clock = nullptr;
 
 ClockInterface* SetClockForTesting(ClockInterface* clock) {
   ClockInterface* prev = g_clock;
   g_clock = clock;
   return prev;
 }
 
-uint64_t TimeNanos() {
-  if (g_clock) {
-    return g_clock->TimeNanos();
-  }
+uint64_t SystemTimeNanos() {
   int64_t ticks;
 #if defined(WEBRTC_MAC)
   static mach_timebase_info_data_t timebase;
   if (timebase.denom == 0) {
     // Get the timebase if this is the first time we run.
     // Recommended by Apple's QA1398.
     if (mach_timebase_info(&timebase) != KERN_SUCCESS) {
       RTC_DCHECK(false);
     }
   }
@@ skipping 24 matching lines @@
   ticks = now + (num_wrap_timegettime << 32);
   // TODO(deadbeef): Calculate with nanosecond precision. Otherwise, we're
   // just wasting a multiply and divide when doing Time() on Windows.
   ticks = ticks * kNumNanosecsPerMillisec;
 #else
 #error Unsupported platform.
 #endif
   return ticks;
 }
 
+int64_t SystemTimeMillis() {
+  return static_cast<int64_t>(SystemTimeNanos() / kNumNanosecsPerMillisec);
+}
+
+uint64_t TimeNanos() {
+  if (g_clock) {
+    return g_clock->TimeNanos();
+  }
+  return SystemTimeNanos();
+}
+
 uint32_t Time32() {
   return static_cast<uint32_t>(TimeNanos() / kNumNanosecsPerMillisec);
 }
 
 int64_t TimeMillis() {
   return static_cast<int64_t>(TimeNanos() / kNumNanosecsPerMillisec);
 }
 
 uint64_t TimeMicros() {
   return static_cast<uint64_t>(TimeNanos() / kNumNanosecsPerMicrosec);
@@ skipping 72 matching lines @@
   if (expiry_in_leap_year && month <= 2 - 1) // |month| is zero based.
     day -= 1;
 
   // Combine all variables into seconds from 1970-01-01 00:00 (except |month|
   // which was accumulated into |day| above).
   return (((static_cast<int64_t>
             (year - 1970) * 365 + day) * 24 + hour) * 60 + min) * 60 + sec;
 }
 
 } // namespace rtc