ISchedulingPolicyService.cpp revision f99498ee4de7123e2fd71778c6877be44fbd1506 
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
23namespace android {
24
25// Keep in sync with frameworks/base/core/java/android/os/ISchedulingPolicyService.aidl
26enum {
27    REQUEST_PRIORITY_TRANSACTION = IBinder::FIRST_CALL_TRANSACTION,
28};
29
30// ----------------------------------------------------------------------
31
32class BpSchedulingPolicyService : public BpInterface<ISchedulingPolicyService>
33{
34public:
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
63IMPLEMENT_META_INTERFACE(SchedulingPolicyService, "android.os.ISchedulingPolicyService");
64
65// ----------------------------------------------------------------------
66
67status_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