Android/frameworks_base
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Allow injecting cached NTP time without network

Browse Source 
Bug: 197038444
Test: manual
Change-Id: Ib47bc64e706201620edf6403da86338f6734dae4
This commit is contained in:
Yu-Han Yang
2022-04-20 15:22:04 -07:00
parent d8a7e13af9
commit 34fbbdeb9a
1 changed files with 25 additions and 18 deletions
Download Patch File Download Diff File Expand all files Collapse all files

43
services/core/java/com/android/server/location/gnss/NtpTimeHelper.java
View File

@@ -73,7 +73,6 @@ class NtpTimeHelper {
private final WakeLock mWakeLock;
private final Handler mHandler;
@GuardedBy("this")
private final InjectNtpTimeCallback mCallback;
// flags to trigger NTP when network becomes available
@@ -129,6 +128,8 @@ class NtpTimeHelper {
return;
}
if (!isNetworkConnected()) {
// try to inject the cached NTP time
injectCachedNtpTime();
// try again when network is up
mInjectNtpTimeState = STATE_PENDING_NETWORK;
return;
@@ -157,23 +158,7 @@ class NtpTimeHelper {
// only update when NTP time is fresh
// If refreshSuccess is false, cacheAge does not drop down.
ntpResult = mNtpTime.getCachedTimeResult();
if (ntpResult != null && ntpResult.getAgeMillis() < NTP_INTERVAL) {
long time = ntpResult.getTimeMillis();
long timeReference = ntpResult.getElapsedRealtimeMillis();
long certainty = ntpResult.getCertaintyMillis();
if (DEBUG) {
long now = System.currentTimeMillis();
Log.d(TAG, "NTP server returned: "
+ time + " (" + new Date(time) + ")"
+ " ntpResult: " + ntpResult
+ " system time offset: " + (time - now));
}
// Ok to cast to int, as can't rollover in practice
mHandler.post(() -> mCallback.injectTime(time, timeReference, (int) certainty));
if (injectCachedNtpTime()) {
delay = NTP_INTERVAL;
mNtpBackOff.reset();
} else {
@@ -201,4 +186,26 @@ class NtpTimeHelper {
// release wake lock held by task
mWakeLock.release();
}
/** Returns true if successfully inject cached NTP time. */
private synchronized boolean injectCachedNtpTime() {
NtpTrustedTime.TimeResult ntpResult = mNtpTime.getCachedTimeResult();
if (ntpResult == null || ntpResult.getAgeMillis() >= NTP_INTERVAL) {
return false;
}
long time = ntpResult.getTimeMillis();
long timeReference = ntpResult.getElapsedRealtimeMillis();
long certainty = ntpResult.getCertaintyMillis();
if (DEBUG) {
long now = System.currentTimeMillis();
Log.d(TAG, "NTP server returned: " + time + " (" + new Date(time) + ")"
+ " ntpResult: " + ntpResult + " system time offset: " + (time - now));
}
// Ok to cast to int, as can't rollover in practice
mHandler.post(() -> mCallback.injectTime(time, timeReference, (int) certainty));
return true;
}
}