1 /* 2 * Copyright 2015 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_PROCESS_INFO_SERVICE_H 18 #define ANDROID_PROCESS_INFO_SERVICE_H 19 20 #ifndef __ANDROID_VNDK__ 21 22 #include <binder/IProcessInfoService.h> 23 #include <utils/Errors.h> 24 #include <utils/Singleton.h> 25 #include <sys/types.h> 26 27 namespace android { 28 29 // ---------------------------------------------------------------------- 30 31 class ProcessInfoService : public Singleton<ProcessInfoService> { 32 33 friend class Singleton<ProcessInfoService>; 34 sp<IProcessInfoService> mProcessInfoService; 35 Mutex mProcessInfoLock; 36 37 ProcessInfoService(); 38 39 status_t getProcessStatesImpl(size_t length, /*in*/ int32_t* pids, /*out*/ int32_t* states); 40 status_t getProcessStatesScoresImpl(size_t length, /*in*/ int32_t* pids, 41 /*out*/ int32_t* states, /*out*/ int32_t *scores); 42 void updateBinderLocked(); 43 44 static const int BINDER_ATTEMPT_LIMIT = 5; 45 46 public: 47 48 /** 49 * For each PID in the given "pids" input array, write the current process state 50 * for that process into the "states" output array, or 51 * ActivityManager.PROCESS_STATE_NONEXISTENT * to indicate that no process with the given PID 52 * exists. 53 * 54 * Returns NO_ERROR if this operation was successful, or a negative error code otherwise. 55 */ getProcessStatesFromPids(size_t length,int32_t * pids,int32_t * states)56 static status_t getProcessStatesFromPids(size_t length, /*in*/ int32_t* pids, 57 /*out*/ int32_t* states) { 58 return ProcessInfoService::getInstance().getProcessStatesImpl(length, /*in*/ pids, 59 /*out*/ states); 60 } 61 62 /** 63 * For each PID in the given "pids" input array, write the current process state 64 * for that process into the "states" output array, or 65 * ActivityManager.PROCESS_STATE_NONEXISTENT * to indicate that no process with the given PID 66 * exists. OoM scores will also be written in the "scores" output array. 67 * Please also note that clients calling this method need to have 68 * "GET_PROCESS_STATE_AND_OOM_SCORE" permission. 69 * 70 * Returns NO_ERROR if this operation was successful, or a negative error code otherwise. 71 */ getProcessStatesScoresFromPids(size_t length,int32_t * pids,int32_t * states,int32_t * scores)72 static status_t getProcessStatesScoresFromPids(size_t length, /*in*/ int32_t* pids, 73 /*out*/ int32_t* states, /*out*/ int32_t *scores) { 74 return ProcessInfoService::getInstance().getProcessStatesScoresImpl( 75 length, /*in*/ pids, /*out*/ states, /*out*/ scores); 76 } 77 }; 78 79 // ---------------------------------------------------------------------- 80 81 } // namespace android 82 83 #else // __ANDROID_VNDK__ 84 #error "This header is not visible to vendors" 85 #endif // __ANDROID_VNDK__ 86 87 #endif // ANDROID_PROCESS_INFO_SERVICE_H 88 89