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