IResourceManagerService.cpp revision 37c8924c508a7c9b8bd3c8ce80fc005070531902 
1/*
2**
3** Copyright 2015, The Android Open Source Project
4**
5** Licensed under the Apache License, Version 2.0 (the "License");
6** you may not use this file except in compliance with the License.
7** You may obtain a copy of the License at
8**
9**     http://www.apache.org/licenses/LICENSE-2.0
10**
11** Unless required by applicable law or agreed to in writing, software
12** distributed under the License is distributed on an "AS IS" BASIS,
13** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14** See the License for the specific language governing permissions and
15** limitations under the License.
16*/
17
18//#define LOG_NDEBUG 0
19#define LOG_TAG "IResourceManagerService"
20#include <utils/Log.h>
21
22#include "media/IResourceManagerService.h"
23
24#include <binder/Parcel.h>
25
26#include <stdint.h>
27#include <sys/types.h>
28
29namespace android {
30
31enum {
32    CONFIG = IBinder::FIRST_CALL_TRANSACTION,
33    ADD_RESOURCE,
34    REMOVE_RESOURCE,
35    RECLAIM_RESOURCE,
36};
37
38template <typename T>
39static void writeToParcel(Parcel *data, const Vector<T> &items) {
40    size_t size = items.size();
41    // truncates size, but should be okay for this usecase
42    data->writeUint32(static_cast<uint32_t>(size));
43    for (size_t i = 0; i < size; i++) {
44        items[i].writeToParcel(data);
45    }
46}
47
48template <typename T>
49static void readFromParcel(const Parcel &data, Vector<T> *items) {
50    size_t size = (size_t)data.readUint32();
51    for (size_t i = 0; i < size && data.dataAvail() > 0; i++) {
52        T item;
53        item.readFromParcel(data);
54        items->add(item);
55    }
56}
57
58class BpResourceManagerService : public BpInterface<IResourceManagerService>
59{
60public:
61    BpResourceManagerService(const sp<IBinder> &impl)
62        : BpInterface<IResourceManagerService>(impl)
63    {
64    }
65
66    virtual void config(const Vector<MediaResourcePolicy> &policies) {
67        Parcel data, reply;
68        data.writeInterfaceToken(IResourceManagerService::getInterfaceDescriptor());
69        writeToParcel(&data, policies);
70        remote()->transact(CONFIG, data, &reply);
71    }
72
73    virtual void addResource(
74            int pid,
75            int64_t clientId,
76            const sp<IResourceManagerClient> client,
77            const Vector<MediaResource> &resources) {
78        Parcel data, reply;
79        data.writeInterfaceToken(IResourceManagerService::getInterfaceDescriptor());
80        data.writeInt32(pid);
81        data.writeInt64(clientId);
82        data.writeStrongBinder(IInterface::asBinder(client));
83        writeToParcel(&data, resources);
84
85        remote()->transact(ADD_RESOURCE, data, &reply);
86    }
87
88    virtual void removeResource(int pid, int64_t clientId) {
89        Parcel data, reply;
90        data.writeInterfaceToken(IResourceManagerService::getInterfaceDescriptor());
91        data.writeInt32(pid);
92        data.writeInt64(clientId);
93
94        remote()->transact(REMOVE_RESOURCE, data, &reply);
95    }
96
97    virtual bool reclaimResource(int callingPid, const Vector<MediaResource> &resources) {
98        Parcel data, reply;
99        data.writeInterfaceToken(IResourceManagerService::getInterfaceDescriptor());
100        data.writeInt32(callingPid);
101        writeToParcel(&data, resources);
102
103        bool ret = false;
104        status_t status = remote()->transact(RECLAIM_RESOURCE, data, &reply);
105        if (status == NO_ERROR) {
106            ret = (bool)reply.readInt32();
107        }
108        return ret;
109    }
110};
111
112IMPLEMENT_META_INTERFACE(ResourceManagerService, "android.media.IResourceManagerService");
113
114// ----------------------------------------------------------------------
115
116
117status_t BnResourceManagerService::onTransact(
118    uint32_t code, const Parcel &data, Parcel *reply, uint32_t flags)
119{
120    switch (code) {
121        case CONFIG: {
122            CHECK_INTERFACE(IResourceManagerService, data, reply);
123            Vector<MediaResourcePolicy> policies;
124            readFromParcel(data, &policies);
125            config(policies);
126            return NO_ERROR;
127        } break;
128
129        case ADD_RESOURCE: {
130            CHECK_INTERFACE(IResourceManagerService, data, reply);
131            int pid = data.readInt32();
132            int64_t clientId = data.readInt64();
133            sp<IResourceManagerClient> client(
134                    interface_cast<IResourceManagerClient>(data.readStrongBinder()));
135            Vector<MediaResource> resources;
136            readFromParcel(data, &resources);
137            addResource(pid, clientId, client, resources);
138            return NO_ERROR;
139        } break;
140
141        case REMOVE_RESOURCE: {
142            CHECK_INTERFACE(IResourceManagerService, data, reply);
143            int pid = data.readInt32();
144            int64_t clientId = data.readInt64();
145            removeResource(pid, clientId);
146            return NO_ERROR;
147        } break;
148
149        case RECLAIM_RESOURCE: {
150            CHECK_INTERFACE(IResourceManagerService, data, reply);
151            int callingPid = data.readInt32();
152            Vector<MediaResource> resources;
153            readFromParcel(data, &resources);
154            bool ret = reclaimResource(callingPid, resources);
155            reply->writeInt32(ret);
156            return NO_ERROR;
157        } break;
158
159        default:
160            return BBinder::onTransact(code, data, reply, flags);
161    }
162}
163
164// ----------------------------------------------------------------------------
165
166}; // namespace android
167