Use ThreadPrioritySetter to set thread priority

Use ThreadPrioritySetter registered in Android runtime to set thread
priority.

Bug: 139521784
Test: CtsLibcoreTestCases, device boot to home, thread priority set
      as expected.
Change-Id: I71c5052beb171f966eba97401159306b87e397b7

1 files changed, 6 insertions, 0 deletions

diff --git a/mmodules/core_platform_api/api/platform/current-api.txt b/mmodules/core_platform_api/api/platform/current-api.txt
index 8abb9be236..cbb729a3d7 100644
--- a/mmodules/core_platform_api/api/platform/current-api.txt
+++ b/mmodules/core_platform_api/api/platform/current-api.txt
@@ -627,6 +627,8 @@ package dalvik.system {
   }
 
   public final class RuntimeHooks {
+    method @Nullable public static dalvik.system.ThreadPrioritySetter getThreadPrioritySetter();
+    method public static void setThreadPrioritySetter(@NonNull dalvik.system.ThreadPrioritySetter);
     method public static void setTimeZoneIdSupplier(java.util.function.Supplier<java.lang.String>);
     method public static void setUncaughtExceptionPreHandler(java.lang.Thread.UncaughtExceptionHandler);
   }
@@ -643,6 +645,10 @@ package dalvik.system {
     method public final void untag(java.net.DatagramSocket) throws java.net.SocketException;
   }
 
+  @java.lang.FunctionalInterface public interface ThreadPrioritySetter {
+    method public void setPriority(int);
+  }
+
   public final class VMDebug {
     method public static void attachAgent(String, ClassLoader) throws java.io.IOException;
     method public static boolean cacheRegisterMap(String);