diff --git a/libc/Android.bp b/libc/Android.bp
index f5f5f7c..ecabb06 100644
--- a/libc/Android.bp
+++ b/libc/Android.bp
@@ -1205,8 +1205,8 @@
         "bionic/termios.cpp",
         "bionic/thread_private.cpp",
         "bionic/threads.cpp",
+        "bionic/time.cpp",
         "bionic/time_l.cpp",
-        "bionic/timespec_get.cpp",
         "bionic/tmpfile.cpp",
         "bionic/umount.cpp",
         "bionic/unlink.cpp",
diff --git a/libc/bionic/timespec_get.cpp b/libc/bionic/time.cpp
similarity index 70%
rename from libc/bionic/timespec_get.cpp
rename to libc/bionic/time.cpp
index 7fc2182..3a41027 100644
--- a/libc/bionic/timespec_get.cpp
+++ b/libc/bionic/time.cpp
@@ -28,6 +28,27 @@
 
 #include <time.h>
 
+static clockid_t __base_to_clock(int base) {
+  switch (base) {
+    case TIME_UTC:
+      return CLOCK_REALTIME;
+    case TIME_MONOTONIC:
+      return CLOCK_MONOTONIC;
+    case TIME_ACTIVE:
+      return CLOCK_PROCESS_CPUTIME_ID;
+    case TIME_THREAD_ACTIVE:
+      return CLOCK_THREAD_CPUTIME_ID;
+    default:
+      return -1;
+  }
+}
+
 int timespec_get(timespec* ts, int base) {
-  return (base == TIME_UTC && clock_gettime(CLOCK_REALTIME, ts) != -1) ? base : 0;
+  clockid_t clock = __base_to_clock(base);
+  return (clock != -1 && clock_gettime(clock, ts) != -1) ? base : 0;
+}
+
+int timespec_getres(timespec* ts, int base) {
+  clockid_t clock = __base_to_clock(base);
+  return (clock != -1 && clock_getres(clock, ts) != -1) ? base : 0;
 }
diff --git a/libc/include/time.h b/libc/include/time.h
index 5339540..2d2de9f 100644
--- a/libc/include/time.h
+++ b/libc/include/time.h
@@ -26,8 +26,7 @@
  * SUCH DAMAGE.
  */
 
-#ifndef _TIME_H_
-#define _TIME_H_
+#pragma once
 
 #include <sys/cdefs.h>
 #include <sys/time.h>
@@ -105,9 +104,52 @@
 time_t timelocal(struct tm* _Nonnull __tm);
 time_t timegm(struct tm* _Nonnull __tm);
 
+/**
+ * The timebase for timespec_get() and timespec_getres() corresponding to CLOCK_REALTIME.
+ *
+ * Available since API level 29.
+ */
 #define TIME_UTC 1
+
+/**
+ * The timebase for timespec_get() and timespec_getres() corresponding to CLOCK_MONOTONIC.
+ *
+ * Available since API level 35.
+ */
+#define TIME_MONOTONIC 2
+
+/**
+ * The timebase for timespec_get() and timespec_getres() corresponding to CLOCK_PROCESS_CPUTIME_ID.
+ *
+ * Available since API level 35.
+ */
+#define TIME_ACTIVE 3
+
+/**
+ * The timebase for timespec_get() and timespec_getres() corresponding to CLOCK_THREAD_CPUTIME_ID.
+ *
+ * Available since API level 35.
+ */
+#define TIME_THREAD_ACTIVE 4
+
+/**
+ * timespec_get(3) is equivalent to clock_gettime() for the clock corresponding to the given base.
+ *
+ * Returns the base on success and returns 0 on failure.
+ *
+ * Available since API level 29 for TIME_UTC; other bases arrived later.
+ * Code for Android should prefer clock_gettime().
+ */
 int timespec_get(struct timespec* _Nonnull __ts, int __base) __INTRODUCED_IN(29);
 
-__END_DECLS
+/**
+ * timespec_getres(3) is equivalent to clock_getres() for the clock corresponding to the given base.
+ *
+ * Returns the base on success and returns 0 on failure.
+ *
+ * Available since API level 35.
+ * Code for Android should prefer clock_gettime().
+ */
+int timespec_getres(struct timespec* _Nonnull __ts, int __base) __INTRODUCED_IN(35);
 
-#endif
+__END_DECLS
diff --git a/libc/libc.map.txt b/libc/libc.map.txt
index c75b13a..0102b30 100644
--- a/libc/libc.map.txt
+++ b/libc/libc.map.txt
@@ -1584,6 +1584,11 @@
     posix_spawn_file_actions_addfchdir_np;
 } LIBC_T;
 
+LIBC_V { # introduced=VanillaIceCream
+  global:
+    timespec_getres;
+} LIBC_U;
+
 LIBC_PRIVATE {
   global:
     __accept4; # arm x86