1 /* 2 * Copyright (C) 2005 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_PROCESS_STATE_H 18 #define ANDROID_HARDWARE_PROCESS_STATE_H 19 20 #include <hwbinder/IBinder.h> 21 #include <utils/KeyedVector.h> 22 #include <utils/String8.h> 23 #include <utils/String16.h> 24 25 #include <utils/threads.h> 26 27 #include <pthread.h> 28 29 // --------------------------------------------------------------------------- 30 namespace android { 31 namespace hardware { 32 33 class IPCThreadState; 34 35 class ProcessState : public virtual RefBase 36 { 37 public: 38 static sp<ProcessState> self(); 39 static sp<ProcessState> selfOrNull(); 40 41 void setContextObject(const sp<IBinder>& object); 42 sp<IBinder> getContextObject(const sp<IBinder>& caller); 43 44 void setContextObject(const sp<IBinder>& object, 45 const String16& name); 46 sp<IBinder> getContextObject(const String16& name, 47 const sp<IBinder>& caller); 48 49 void startThreadPool(); 50 51 typedef bool (*context_check_func)(const String16& name, 52 const sp<IBinder>& caller, 53 void* userData); 54 55 bool isContextManager(void) const; 56 bool becomeContextManager( 57 context_check_func checkFunc, 58 void* userData); 59 60 sp<IBinder> getStrongProxyForHandle(int32_t handle); 61 wp<IBinder> getWeakProxyForHandle(int32_t handle); 62 void expungeHandle(int32_t handle, IBinder* binder); 63 64 void spawnPooledThread(bool isMain); 65 66 status_t setThreadPoolConfiguration(size_t maxThreads, bool callerJoinsPool); 67 void giveThreadPoolName(); 68 69 ssize_t getKernelReferences(size_t count, uintptr_t* buf); 70 71 private: 72 friend class IPCThreadState; 73 74 ProcessState(); 75 ~ProcessState(); 76 77 ProcessState(const ProcessState& o); 78 ProcessState& operator=(const ProcessState& o); 79 String8 makeBinderThreadName(); 80 81 struct handle_entry { 82 IBinder* binder; 83 RefBase::weakref_type* refs; 84 }; 85 86 handle_entry* lookupHandleLocked(int32_t handle); 87 88 int mDriverFD; 89 void* mVMStart; 90 91 // Protects thread count variable below. 92 pthread_mutex_t mThreadCountLock; 93 pthread_cond_t mThreadCountDecrement; 94 // Number of binder threads current executing a command. 95 size_t mExecutingThreadsCount; 96 // Maximum number for binder threads allowed for this process. 97 size_t mMaxThreads; 98 // Time when thread pool was emptied 99 int64_t mStarvationStartTimeMs; 100 101 mutable Mutex mLock; // protects everything below. 102 103 Vector<handle_entry>mHandleToObject; 104 105 bool mManagesContexts; 106 context_check_func mBinderContextCheckFunc; 107 void* mBinderContextUserData; 108 109 KeyedVector<String16, sp<IBinder> > 110 mContexts; 111 112 113 String8 mRootDir; 114 bool mThreadPoolStarted; 115 bool mSpawnThreadOnStart; 116 volatile int32_t mThreadPoolSeq; 117 }; 118 119 }; // namespace hardware 120 }; // namespace android 121 122 // --------------------------------------------------------------------------- 123 124 #endif // ANDROID_HARDWARE_PROCESS_STATE_H 125