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      1 /*
      2  * Copyright (C) 2016 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 #ifndef ANDROID_HARDWARE_CONTEXTHUB_V1_0_CONTEXTHUB_H_
     18 #define ANDROID_HARDWARE_CONTEXTHUB_V1_0_CONTEXTHUB_H_
     19 
     20 #include <unordered_map>
     21 
     22 #include <android-base/macros.h>
     23 #include <android/hardware/contexthub/1.0/IContexthub.h>
     24 #include <hardware/context_hub.h>
     25 
     26 namespace android {
     27 namespace hardware {
     28 namespace contexthub {
     29 namespace V1_0 {
     30 namespace implementation {
     31 
     32 struct Contexthub : public ::android::hardware::contexthub::V1_0::IContexthub {
     33     Contexthub();
     34 
     35     Return<void> getHubs(getHubs_cb _hidl_cb) override;
     36 
     37     Return<Result> registerCallback(uint32_t hubId,
     38                                     const sp<IContexthubCallback> &cb) override;
     39 
     40     Return<Result> sendMessageToHub(uint32_t hubId,
     41                                     const ContextHubMsg &msg) override;
     42 
     43     Return<Result> loadNanoApp(uint32_t hubId,
     44                                const NanoAppBinary& appBinary,
     45                                uint32_t transactionId) override;
     46 
     47     Return<Result> unloadNanoApp(uint32_t hubId,
     48                                  uint64_t appId,
     49                                  uint32_t transactionId) override;
     50 
     51     Return<Result> enableNanoApp(uint32_t hubId,
     52                                  uint64_t appId,
     53                                  uint32_t transactionId) override;
     54 
     55     Return<Result> disableNanoApp(uint32_t hubId,
     56                                   uint64_t appId,
     57                                   uint32_t transactionId) override;
     58 
     59     Return<Result> queryApps(uint32_t hubId) override;
     60 
     61     Return<Result> reboot(uint32_t hubId);
     62 
     63     bool isInitialized();
     64 
     65 private:
     66 
     67     struct CachedHubInformation{
     68         struct hub_app_name_t osAppName;
     69         sp<IContexthubCallback> callback;
     70     };
     71 
     72     class DeathRecipient : public hidl_death_recipient {
     73     public:
     74         DeathRecipient(const sp<Contexthub> contexthub);
     75 
     76         void serviceDied(
     77                 uint64_t cookie,
     78                 const wp<::android::hidl::base::V1_0::IBase>& who) override;
     79 
     80     private:
     81         sp<Contexthub> mContexthub;
     82     };
     83 
     84     status_t mInitCheck;
     85     const struct context_hub_module_t *mContextHubModule;
     86     std::unordered_map<uint32_t, CachedHubInformation> mCachedHubInfo;
     87 
     88     sp<DeathRecipient> mDeathRecipient;
     89     bool mIsTransactionPending;
     90     uint32_t mTransactionId;
     91 
     92     bool isValidHubId(uint32_t hubId);
     93 
     94     sp<IContexthubCallback> getCallBackForHubId(uint32_t hubId);
     95 
     96     int handleOsMessage(sp<IContexthubCallback> cb,
     97                         uint32_t msgType,
     98                         const uint8_t *msg,
     99                         int msgLen);
    100 
    101     // Handle the case where the callback registered for the given hub ID dies
    102     void handleServiceDeath(uint32_t hubId);
    103 
    104     static int contextHubCb(uint32_t hubId,
    105                             const struct hub_message_t *rxMsg,
    106                             void *cookie);
    107 
    108     bool setOsAppAsDestination(hub_message_t *msg, int hubId);
    109 
    110     DISALLOW_COPY_AND_ASSIGN(Contexthub);
    111 };
    112 
    113 extern "C" IContexthub *HIDL_FETCH_IContexthub(const char *name);
    114 
    115 }  // namespace implementation
    116 }  // namespace V1_0
    117 }  // namespace contexthub
    118 }  // namespace hardware
    119 }  // namespace android
    120 
    121 #endif  // ANDROID_HARDWARE_CONTEXTHUB_V1_0_CONTEXTHUB_H_
    122