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Commit a55ef96e authored by Suprabh Shukla's avatar Suprabh Shukla
Browse files

Add uptimeNanos to SystemClock 

Test: system/core/libutils/SystemClock_test.cpp

Bug: 162791194
Change-Id: I0e3ea2004146eb7442c89bb35a9f3a2171d9c4b8
parent c7b92ea1

libutils/SystemClock.cpp

+9 −2
Original line number Diff line number Diff line
@@ -39,8 +39,15 @@ namespace android { 
 */

int64_t uptimeMillis()

{

    int64_t when = systemTime(SYSTEM_TIME_MONOTONIC);

    return (int64_t) nanoseconds_to_milliseconds(when);

    return nanoseconds_to_milliseconds(uptimeNanos());

}



/*

 * public static native long uptimeNanos();

 */

int64_t uptimeNanos()

{

    return systemTime(SYSTEM_TIME_MONOTONIC);

}



/*

libutils/SystemClock_test.cpp

+19 −1
Original line number Diff line number Diff line
@@ -29,16 +29,24 @@ static const int64_t SLACK_NS = SLACK_MS * MS_IN_NS; 


TEST(SystemClock, SystemClock) {

    auto startUptimeMs = android::uptimeMillis();

    auto startUptimeNs = android::uptimeNanos();

    auto startRealtimeMs = android::elapsedRealtime();

    auto startRealtimeNs = android::elapsedRealtimeNano();



    ASSERT_GT(startUptimeMs, 0)

            << "uptimeMillis() reported an impossible uptime";

    ASSERT_GT(startUptimeNs, 0)

            << "uptimeNanos() reported an impossible uptime";

    ASSERT_GE(startRealtimeMs, startUptimeMs)

            << "elapsedRealtime() thinks we've suspended for negative time";

    ASSERT_GE(startRealtimeNs, startUptimeMs * MS_IN_NS)

    ASSERT_GE(startRealtimeNs, startUptimeNs)

            << "elapsedRealtimeNano() thinks we've suspended for negative time";



    ASSERT_GE(startUptimeNs, startUptimeMs * MS_IN_NS)

            << "uptimeMillis() and uptimeNanos() are inconsistent";

    ASSERT_LT(startUptimeNs, (startUptimeMs + SLACK_MS) * MS_IN_NS)

            << "uptimeMillis() and uptimeNanos() are inconsistent";



    ASSERT_GE(startRealtimeNs, startRealtimeMs * MS_IN_NS)

            << "elapsedRealtime() and elapsedRealtimeNano() are inconsistent";

    ASSERT_LT(startRealtimeNs, (startRealtimeMs + SLACK_MS) * MS_IN_NS)
@@ -51,6 +59,7 @@ TEST(SystemClock, SystemClock) { 
    ASSERT_EQ(nanosleepErr, 0) << "nanosleep() failed: " << strerror(errno);



    auto endUptimeMs = android::uptimeMillis();

    auto endUptimeNs = android::uptimeNanos();

    auto endRealtimeMs = android::elapsedRealtime();

    auto endRealtimeNs = android::elapsedRealtimeNano();
@@ -58,6 +67,10 @@ TEST(SystemClock, SystemClock) { 
            << "uptimeMillis() advanced too little after nanosleep()";

    EXPECT_LT(endUptimeMs - startUptimeMs, SLEEP_MS + SLACK_MS)

            << "uptimeMillis() advanced too much after nanosleep()";

    EXPECT_GE(endUptimeNs - startUptimeNs, SLEEP_NS)

            << "uptimeNanos() advanced too little after nanosleep()";

    EXPECT_LT(endUptimeNs - startUptimeNs, SLEEP_NS + SLACK_NS)

            << "uptimeNanos() advanced too much after nanosleep()";

    EXPECT_GE(endRealtimeMs - startRealtimeMs, SLEEP_MS)

            << "elapsedRealtime() advanced too little after nanosleep()";

    EXPECT_LT(endRealtimeMs - startRealtimeMs, SLEEP_MS + SLACK_MS)
@@ -67,6 +80,11 @@ TEST(SystemClock, SystemClock) { 
    EXPECT_LT(endRealtimeNs - startRealtimeNs, SLEEP_NS + SLACK_NS)

            << "elapsedRealtimeNano() advanced too much after nanosleep()";



    EXPECT_GE(endUptimeNs, endUptimeMs * MS_IN_NS)

            << "uptimeMillis() and uptimeNanos() are inconsistent after nanosleep()";

    EXPECT_LT(endUptimeNs, (endUptimeMs + SLACK_MS) * MS_IN_NS)

            << "uptimeMillis() and uptimeNanos() are inconsistent after nanosleep()";



    EXPECT_GE(endRealtimeNs, endRealtimeMs * MS_IN_NS)

            << "elapsedRealtime() and elapsedRealtimeNano() are inconsistent after nanosleep()";

    EXPECT_LT(endRealtimeNs, (endRealtimeMs + SLACK_MS) * MS_IN_NS)

libutils/include/utils/SystemClock.h

+1 −0
Original line number Diff line number Diff line
@@ -23,6 +23,7 @@ 
namespace android {



int64_t uptimeMillis();

int64_t uptimeNanos();

int64_t elapsedRealtime();

int64_t elapsedRealtimeNano();