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      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 #ifndef ANDROID_RESOURCEMANAGERSERVICE_H
     19 #define ANDROID_RESOURCEMANAGERSERVICE_H
     20 
     21 #include <arpa/inet.h>
     22 #include <binder/BinderService.h>
     23 #include <utils/Errors.h>
     24 #include <utils/KeyedVector.h>
     25 #include <utils/String8.h>
     26 #include <utils/threads.h>
     27 #include <utils/Vector.h>
     28 
     29 #include <media/IResourceManagerService.h>
     30 
     31 namespace android {
     32 
     33 class ServiceLog;
     34 struct ProcessInfoInterface;
     35 
     36 struct ResourceInfo {
     37     int64_t clientId;
     38     sp<IResourceManagerClient> client;
     39     sp<IBinder::DeathRecipient> deathNotifier;
     40     Vector<MediaResource> resources;
     41     bool cpuBoost;
     42 };
     43 
     44 typedef Vector<ResourceInfo> ResourceInfos;
     45 typedef KeyedVector<int, ResourceInfos> PidResourceInfosMap;
     46 
     47 class ResourceManagerService
     48     : public BinderService<ResourceManagerService>,
     49       public BnResourceManagerService
     50 {
     51 public:
     52     static char const *getServiceName() { return "media.resource_manager"; }
     53 
     54     virtual status_t dump(int fd, const Vector<String16>& args);
     55 
     56     ResourceManagerService();
     57     explicit ResourceManagerService(sp<ProcessInfoInterface> processInfo);
     58 
     59     // IResourceManagerService interface
     60     virtual void config(const Vector<MediaResourcePolicy> &policies);
     61 
     62     virtual void addResource(
     63             int pid,
     64             int64_t clientId,
     65             const sp<IResourceManagerClient> client,
     66             const Vector<MediaResource> &resources);
     67 
     68     virtual void removeResource(int pid, int64_t clientId);
     69 
     70     // Tries to reclaim resource from processes with lower priority than the calling process
     71     // according to the requested resources.
     72     // Returns true if any resource has been reclaimed, otherwise returns false.
     73     virtual bool reclaimResource(int callingPid, const Vector<MediaResource> &resources);
     74 
     75     void removeResource(int pid, int64_t clientId, bool checkValid);
     76 
     77 protected:
     78     virtual ~ResourceManagerService();
     79 
     80 private:
     81     friend class ResourceManagerServiceTest;
     82 
     83     // Gets the list of all the clients who own the specified resource type.
     84     // Returns false if any client belongs to a process with higher priority than the
     85     // calling process. The clients will remain unchanged if returns false.
     86     bool getAllClients_l(int callingPid, MediaResource::Type type,
     87             Vector<sp<IResourceManagerClient>> *clients);
     88 
     89     // Gets the client who owns specified resource type from lowest possible priority process.
     90     // Returns false if the calling process priority is not higher than the lowest process
     91     // priority. The client will remain unchanged if returns false.
     92     bool getLowestPriorityBiggestClient_l(int callingPid, MediaResource::Type type,
     93             sp<IResourceManagerClient> *client);
     94 
     95     // Gets lowest priority process that has the specified resource type.
     96     // Returns false if failed. The output parameters will remain unchanged if failed.
     97     bool getLowestPriorityPid_l(MediaResource::Type type, int *pid, int *priority);
     98 
     99     // Gets the client who owns biggest piece of specified resource type from pid.
    100     // Returns false if failed. The client will remain unchanged if failed.
    101     bool getBiggestClient_l(int pid, MediaResource::Type type, sp<IResourceManagerClient> *client);
    102 
    103     bool isCallingPriorityHigher_l(int callingPid, int pid);
    104 
    105     // A helper function basically calls getLowestPriorityBiggestClient_l and add the result client
    106     // to the given Vector.
    107     void getClientForResource_l(
    108         int callingPid, const MediaResource *res, Vector<sp<IResourceManagerClient>> *clients);
    109 
    110     mutable Mutex mLock;
    111     sp<ProcessInfoInterface> mProcessInfo;
    112     sp<ServiceLog> mServiceLog;
    113     PidResourceInfosMap mMap;
    114     bool mSupportsMultipleSecureCodecs;
    115     bool mSupportsSecureWithNonSecureCodec;
    116     int32_t mCpuBoostCount;
    117 };
    118 
    119 // ----------------------------------------------------------------------------
    120 
    121 }; // namespace android
    122 
    123 #endif // ANDROID_RESOURCEMANAGERSERVICE_H
    124