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Commit 1a61a0ae authored by Srinath Sridharan's avatar Srinath Sridharan
Browse files

Adding a new getThreadScheduler() method. 

bug:  30226969
Change-Id: Icbd57e99740ebf6ba744a103e6fa69a3160c9422
parent c2674018

api/test-current.txt

+1 −0
Original line number Diff line number Diff line
@@ -29290,6 +29290,7 @@ package android.os { 
    method public static final long getStartElapsedRealtime();

    method public static final long getStartUptimeMillis();

    method public static final int getThreadPriority(int) throws java.lang.IllegalArgumentException;

    method public static final int getThreadScheduler(int) throws java.lang.IllegalArgumentException;

    method public static final int getUidForName(java.lang.String);

    method public static final boolean is64Bit();

    method public static boolean isApplicationUid(int);

core/java/android/os/Process.java

+22 −0
Original line number Diff line number Diff line
@@ -16,6 +16,9 @@ 


package android.os;



import android.annotation.TestApi;

import android.net.LocalSocket;

import android.net.LocalSocketAddress;

import android.system.Os;

import android.system.OsConstants;

import android.util.Log;
@@ -716,6 +719,24 @@ public class Process { 
    public static final native int getThreadPriority(int tid)

            throws IllegalArgumentException;

    

    /**

     * Return the current scheduling policy of a thread, based on Linux.

     *

     * @param tid The identifier of the thread/process to get the scheduling policy.

     *

     * @throws IllegalArgumentException Throws IllegalArgumentException if

     * <var>tid</var> does not exist, or if <var>priority</var> is out of range for the policy.

     * @throws SecurityException Throws SecurityException if your process does

     * not have permission to modify the given thread, or to use the given

     * scheduling policy or priority.

     *

     * {@hide}

     */

    

    @TestApi

    public static final native int getThreadScheduler(int tid)

            throws IllegalArgumentException;



    /**

     * Set the scheduling policy and priority of a thread, based on Linux.

     *
@@ -731,6 +752,7 @@ public class Process { 
     *

     * {@hide}

     */



    public static final native void setThreadScheduler(int tid, int policy, int priority)

            throws IllegalArgumentException;

core/jni/android_util_Process.cpp

+18 −0
Original line number Diff line number Diff line
@@ -440,6 +440,23 @@ static void android_os_Process_setCanSelfBackground(JNIEnv* env, jobject clazz, 
#endif

}



jint android_os_Process_getThreadScheduler(JNIEnv* env, jclass clazz,

                                              jint tid)

{

    int policy = 0;

// linux has sched_getscheduler(), others don't.

#if defined(__linux__)

    errno = 0;

    policy = sched_getscheduler(tid);

    if (errno != 0) {

        signalExceptionForPriorityError(env, errno);

    }

#else

    signalExceptionForPriorityError(env, ENOSYS);

#endif

    return policy;

}



void android_os_Process_setThreadScheduler(JNIEnv* env, jclass clazz,

                                              jint tid, jint policy, jint pri)

{
@@ -1189,6 +1206,7 @@ static const JNINativeMethod methods[] = { 
    {"setCanSelfBackground", "(Z)V", (void*)android_os_Process_setCanSelfBackground},

    {"setThreadPriority",   "(I)V", (void*)android_os_Process_setCallingThreadPriority},

    {"getThreadPriority",   "(I)I", (void*)android_os_Process_getThreadPriority},

    {"getThreadScheduler",   "(I)I", (void*)android_os_Process_getThreadScheduler},

    {"setThreadGroup",      "(II)V", (void*)android_os_Process_setThreadGroup},

    {"setProcessGroup",     "(II)V", (void*)android_os_Process_setProcessGroup},

    {"getProcessGroup",     "(I)I", (void*)android_os_Process_getProcessGroup},