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      1 /*
      2  * Copyright (C) 2012 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 #define LOG_TAG "ISchedulingPolicyService"
     18 //#define LOG_NDEBUG 0
     19 
     20 #include <binder/Parcel.h>
     21 #include "ISchedulingPolicyService.h"
     22 
     23 namespace android {
     24 
     25 // Keep in sync with frameworks/base/core/java/android/os/ISchedulingPolicyService.aidl
     26 enum {
     27     REQUEST_PRIORITY_TRANSACTION = IBinder::FIRST_CALL_TRANSACTION,
     28 };
     29 
     30 // ----------------------------------------------------------------------
     31 
     32 class BpSchedulingPolicyService : public BpInterface<ISchedulingPolicyService>
     33 {
     34 public:
     35     BpSchedulingPolicyService(const sp<IBinder>& impl)
     36         : BpInterface<ISchedulingPolicyService>(impl)
     37     {
     38     }
     39 
     40     virtual int requestPriority(int32_t pid, int32_t tid, int32_t prio, bool asynchronous)
     41     {
     42         Parcel data, reply;
     43         data.writeInterfaceToken(ISchedulingPolicyService::getInterfaceDescriptor());
     44         data.writeInt32(pid);
     45         data.writeInt32(tid);
     46         data.writeInt32(prio);
     47         uint32_t flags = asynchronous ? IBinder::FLAG_ONEWAY : 0;
     48         status_t status = remote()->transact(REQUEST_PRIORITY_TRANSACTION, data, &reply, flags);
     49         if (status != NO_ERROR) {
     50             return status;
     51         }
     52         if (asynchronous) {
     53             return NO_ERROR;
     54         }
     55         // fail on exception: force binder reconnection
     56         if (reply.readExceptionCode() != 0) {
     57             return DEAD_OBJECT;
     58         }
     59         return reply.readInt32();
     60     }
     61 };
     62 
     63 IMPLEMENT_META_INTERFACE(SchedulingPolicyService, "android.os.ISchedulingPolicyService");
     64 
     65 // ----------------------------------------------------------------------
     66 
     67 status_t BnSchedulingPolicyService::onTransact(
     68     uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
     69 {
     70     switch (code) {
     71     case REQUEST_PRIORITY_TRANSACTION:
     72         // Not reached
     73         return NO_ERROR;
     74         break;
     75     default:
     76         return BBinder::onTransact(code, data, reply, flags);
     77     }
     78 }
     79 
     80 }   // namespace android
     81