commit e3d9f91aa68d7479c78abe3dbc4c2d7fd373b753
author Luke Huang <huangluke@google.com> Tue Feb 18 15:53:44 2020 +0800
committer Ruchir Rastogi <ruchirr@google.com> Fri Mar 06 22:09:44 2020 +0000
tree 15d17df68421221ebee00b0c9dd5fda96d7c9f45
parent 720f992bc016407d70872529476def3d632e2be0

Use libbase to get the elapsed time instead of libutils

To minimize the external library dependencies

Bug: 149721367
Test: atest
Change-Id: I7b79223ad58c2af94d01a35ad39be6cdd1de7f47
Merged-In: I7b79223ad58c2af94d01a35ad39be6cdd1de7f47
(cherry picked from commit cab9854fa91b4721eef4d4a549f702f73b7edd8a)

libstats/push_compat/Android.bp

diff --git a/libstats/push_compat/Android.bp b/libstats/push_compat/Android.bp
index 3e69556..4de95dc 100644
--- a/libstats/push_compat/Android.bp
+++ b/libstats/push_compat/Android.bp
@@ -36,7 +36,6 @@
     static_libs: [
         "libbase",
         "liblog",
-        "libutils",
     ],
 }
 

libstats/push_compat/StatsEventCompat.cpp

diff --git a/libstats/push_compat/StatsEventCompat.cpp b/libstats/push_compat/StatsEventCompat.cpp
index de458b3..b065af2 100644
--- a/libstats/push_compat/StatsEventCompat.cpp
+++ b/libstats/push_compat/StatsEventCompat.cpp
@@ -15,12 +15,16 @@
  */
 
 #include "include/StatsEventCompat.h"
+
+#include <chrono>
+
+#include <android-base/chrono_utils.h>
 #include <android-base/properties.h>
 #include <android/api-level.h>
 #include <android/log.h>
 #include <dlfcn.h>
-#include <utils/SystemClock.h>
 
+using android::base::boot_clock;
 using android::base::GetProperty;
 
 const static int kStatsEventTag = 1937006964;
@@ -41,6 +45,12 @@
 void* StatsEventCompat::mStatsEventApi = nullptr;
 std::mutex StatsEventCompat::mLoadLock;
 
+static int64_t elapsedRealtimeNano() {
+    return std::chrono::time_point_cast<std::chrono::nanoseconds>(boot_clock::now())
+            .time_since_epoch()
+            .count();
+}
+
 StatsEventCompat::StatsEventCompat() : mEventQ(kStatsEventTag) {
     // guard loading because StatsEventCompat might be called from multithreaded
     // environment
@@ -61,7 +71,7 @@
     if (mStatsEventApi) {
         //        mEventR = mStatsEventApi->obtain();
     } else if (!mPlatformAtLeastR) {
-        mEventQ << android::elapsedRealtimeNano();
+        mEventQ << elapsedRealtimeNano();
     }
 }