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Commit c6832095 authored by Devin Moore's avatar Devin Moore Committed by Gerrit Code Review
Browse files

Merge changes from topic "HwNoService" into main 

* changes:
  Create a HwNoService class that fakes hwservicemanager
  Add isHidlSupported Java API
parents 46f743d1 ab4e9b68

core/java/android/os/HidlSupport.java

+7 −0
Original line number Diff line number Diff line
@@ -218,6 +218,13 @@ public class HidlSupport { 
    @SystemApi

    public static native int getPidIfSharable();



    /**

     * Return true if HIDL is supported on this device and false if not.

     *

     * @hide

     */

    public static native boolean isHidlSupported();



    /** @hide */

    public HidlSupport() {}

}

core/java/android/os/HwBinder.java

+12 −0
Original line number Diff line number Diff line
@@ -18,6 +18,7 @@ package android.os; 


import android.annotation.SystemApi;

import android.compat.annotation.UnsupportedAppUsage;

import android.util.Log;



import libcore.util.NativeAllocationRegistry;
@@ -78,6 +79,17 @@ public abstract class HwBinder implements IHwBinder { 
            String iface,

            String serviceName)

        throws RemoteException, NoSuchElementException {

        if (!HidlSupport.isHidlSupported()

                && (iface.equals("android.hidl.manager@1.0::IServiceManager")

                        || iface.equals("android.hidl.manager@1.1::IServiceManager")

                        || iface.equals("android.hidl.manager@1.2::IServiceManager"))) {

            Log.i(

                    TAG,

                    "Replacing Java hwservicemanager with a fake HwNoService"

                            + " because HIDL is not supported on this device.");

            return new HwNoService();

        }



        return getService(iface, serviceName, false /* retry */);

    }

    /**

core/java/android/os/HwNoService.java

0 → 100644
+52 −0
Original line number Diff line number Diff line 
/*

 * Copyright (C) 2023 The Android Open Source Project

 *

 * Licensed under the Apache License, Version 2.0 (the "License");

 * you may not use this file except in compliance with the License.

 * You may obtain a copy of the License at

 *

 *      http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */



package android.os;



/**

 * A fake hwservicemanager that is used locally when HIDL isn't supported on the device.

 *

 * @hide

 */

final class HwNoService implements IHwBinder, IHwInterface {

    /** @hide */

    @Override

    public void transact(int code, HwParcel request, HwParcel reply, int flags) {}



    /** @hide */

    @Override

    public IHwInterface queryLocalInterface(String descriptor) {

        return new HwNoService();

    }



    /** @hide */

    @Override

    public boolean linkToDeath(DeathRecipient recipient, long cookie) {

        return true;

    }



    /** @hide */

    @Override

    public boolean unlinkToDeath(DeathRecipient recipient) {

        return true;

    }



    /** @hide */

    @Override

    public IHwBinder asBinder() {

        return this;

    }

}

core/jni/android_os_HidlSupport.cpp

+7 −1
Original line number Diff line number Diff line
@@ -15,6 +15,7 @@ 
 */



#include <hidl/HidlTransportSupport.h>

#include <hidl/ServiceManagement.h>

#include <nativehelper/JNIHelp.h>



#include "core_jni_helpers.h"
@@ -24,8 +25,13 @@ static jint android_os_HidlSupport_getPidIfSharable(JNIEnv*, jclass) { 
    return android::hardware::details::getPidIfSharable();

}



static jboolean android_os_HidlSupport_isHidlSupported(JNIEnv*, jclass) {

    return android::hardware::isHidlSupported();

}



static const JNINativeMethod gHidlSupportMethods[] = {

        {"getPidIfSharable", "()I", (void*)android_os_HidlSupport_getPidIfSharable},

        {"isHidlSupported", "()Z", (void*)android_os_HidlSupport_isHidlSupported},

};



const char* const kHidlSupportPathName = "android/os/HidlSupport";