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 static sp<ProcessState> selfOrNull(); 39 /* initWithDriver() can be used to configure libbinder to use 40 * a different binder driver dev node. It must be called *before* 41 * any call to ProcessState::self(). /dev/binder remains the default. 42 */ 43 static sp<ProcessState> initWithDriver(const char *driver); 44 45 void setContextObject(const sp<IBinder>& object); 46 sp<IBinder> getContextObject(const sp<IBinder>& caller); 47 48 void setContextObject(const sp<IBinder>& object, 49 const String16& name); 50 sp<IBinder> getContextObject(const String16& name, 51 const sp<IBinder>& caller); 52 53 void startThreadPool(); 54 55 typedef bool (*context_check_func)(const String16& name, 56 const sp<IBinder>& caller, 57 void* userData); 58 59 bool isContextManager(void) const; 60 bool becomeContextManager( 61 context_check_func checkFunc, 62 void* userData); 63 64 sp<IBinder> getStrongProxyForHandle(int32_t handle); 65 wp<IBinder> getWeakProxyForHandle(int32_t handle); 66 void expungeHandle(int32_t handle, IBinder* binder); 67 68 void spawnPooledThread(bool isMain); 69 70 status_t setThreadPoolMaxThreadCount(size_t maxThreads); 71 void giveThreadPoolName(); 72 73 String8 getDriverName(); 74 75 ssize_t getKernelReferences(size_t count, uintptr_t* buf); 76 77 private: 78 friend class IPCThreadState; 79 80 ProcessState(const char* driver); 81 ~ProcessState(); 82 83 ProcessState(const ProcessState& o); 84 ProcessState& operator=(const ProcessState& o); 85 String8 makeBinderThreadName(); 86 87 struct handle_entry { 88 IBinder* binder; 89 RefBase::weakref_type* refs; 90 }; 91 92 handle_entry* lookupHandleLocked(int32_t handle); 93 94 String8 mDriverName; 95 int mDriverFD; 96 void* mVMStart; 97 98 // Protects thread count variable below. 99 pthread_mutex_t mThreadCountLock; 100 pthread_cond_t mThreadCountDecrement; 101 // Number of binder threads current executing a command. 102 size_t mExecutingThreadsCount; 103 // Maximum number for binder threads allowed for this process. 104 size_t mMaxThreads; 105 // Time when thread pool was emptied 106 int64_t mStarvationStartTimeMs; 107 108 mutable Mutex mLock; // protects everything below. 109 110 Vector<handle_entry>mHandleToObject; 111 112 bool mManagesContexts; 113 context_check_func mBinderContextCheckFunc; 114 void* mBinderContextUserData; 115 116 KeyedVector<String16, sp<IBinder> > 117 mContexts; 118 119 120 String8 mRootDir; 121 bool mThreadPoolStarted; 122 volatile int32_t mThreadPoolSeq; 123 }; 124 125 }; // namespace android 126 127 // --------------------------------------------------------------------------- 128 129 #endif // ANDROID_PROCESS_STATE_H 130