commit 07b0465095bd9ab3412caefa4fcacbdc3825c64b
author Glenn Kasten <gkasten@google.com> Mon Apr 23 15:00:43 2012 -0700
committer Glenn Kasten <gkasten@google.com> Tue Apr 24 09:53:14 2012 -0700
tree c69073a76d56a988b7574623dc54d2027e9dda37
parent f03f64d81036cb453345462714beb4298eac32a9

Scheduling policy service

Change-Id: I6178b96896ffbb3323210f93784a65d724a3e694

core/java/android/os/Process.java

diff --git a/core/java/android/os/Process.java b/core/java/android/os/Process.java
index 8e041bb..0ba7b88 100644
--- a/core/java/android/os/Process.java
+++ b/core/java/android/os/Process.java
@@ -299,6 +299,24 @@
      **/
     private static final int THREAD_GROUP_FOREGROUND = 1;
 
+    /**
+     * System thread group.
+     * @hide
+     **/
+    public static final int THREAD_GROUP_SYSTEM = 2;
+
+    /**
+     * Application audio thread group.
+     * @hide
+     **/
+    public static final int THREAD_GROUP_AUDIO_APP = 3;
+
+    /**
+     * System audio thread group.
+     * @hide
+     **/
+    public static final int THREAD_GROUP_AUDIO_SYS = 4;
+
     public static final int SIGNAL_QUIT = 3;
     public static final int SIGNAL_KILL = 9;
     public static final int SIGNAL_USR1 = 10;
@@ -658,6 +676,21 @@
     }
 
     /**
+     * Returns the thread group leader id for a currently running thread.
+     * @param tid the thread id
+     * @return the thread group leader id of the thread, or -1 if the thread is not running.
+     *         This is same as what getpid(2) would return if called by tid.
+     * @hide
+     */
+    public static final int getThreadGroupLeader(int tid) {
+        String[] procStatusLabels = { "Tgid:" };
+        long[] procStatusValues = new long[1];
+        procStatusValues[0] = -1;
+        Process.readProcLines("/proc/" + tid + "/status", procStatusLabels, procStatusValues);
+        return (int) procStatusValues[0];
+    }
+
+    /**
      * Set the priority of a thread, based on Linux priorities.
      * 
      * @param tid The identifier of the thread/process to change.