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 29 namespace android { 30 31 enum { 32 CONFIG = IBinder::FIRST_CALL_TRANSACTION, 33 ADD_RESOURCE, 34 REMOVE_RESOURCE, 35 RECLAIM_RESOURCE, 36 }; 37 38 template <typename T> 39 static 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 48 template <typename T> 49 static 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 58 class BpResourceManagerService : public BpInterface<IResourceManagerService> 59 { 60 public: 61 explicit 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 }; 111 112 IMPLEMENT_META_INTERFACE(ResourceManagerService, "android.media.IResourceManagerService"); 113 114 // ---------------------------------------------------------------------- 115 116 117 status_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 if (client == NULL) { 136 return NO_ERROR; 137 } 138 Vector<MediaResource> resources; 139 readFromParcel(data, &resources); 140 addResource(pid, clientId, client, resources); 141 return NO_ERROR; 142 } break; 143 144 case REMOVE_RESOURCE: { 145 CHECK_INTERFACE(IResourceManagerService, data, reply); 146 int pid = data.readInt32(); 147 int64_t clientId = data.readInt64(); 148 removeResource(pid, clientId); 149 return NO_ERROR; 150 } break; 151 152 case RECLAIM_RESOURCE: { 153 CHECK_INTERFACE(IResourceManagerService, data, reply); 154 int callingPid = data.readInt32(); 155 Vector<MediaResource> resources; 156 readFromParcel(data, &resources); 157 bool ret = reclaimResource(callingPid, resources); 158 reply->writeInt32(ret); 159 return NO_ERROR; 160 } break; 161 162 default: 163 return BBinder::onTransact(code, data, reply, flags); 164 } 165 } 166 167 // ---------------------------------------------------------------------------- 168 169 }; // namespace android 170