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_IPC_THREAD_STATE_H 18 #define ANDROID_IPC_THREAD_STATE_H 19 20 #include <utils/Errors.h> 21 #include <binder/Parcel.h> 22 #include <binder/ProcessState.h> 23 #include <utils/Vector.h> 24 25 #ifdef HAVE_WIN32_PROC 26 typedef int uid_t; 27 #endif 28 29 // --------------------------------------------------------------------------- 30 namespace android { 31 32 class IPCThreadState 33 { 34 public: 35 static IPCThreadState* self(); 36 37 sp<ProcessState> process(); 38 39 status_t clearLastError(); 40 41 int getCallingPid(); 42 int getCallingUid(); 43 44 void setStrictModePolicy(int32_t policy); 45 int32_t getStrictModePolicy() const; 46 47 void setLastTransactionBinderFlags(int32_t flags); 48 int32_t getLastTransactionBinderFlags() const; 49 50 int64_t clearCallingIdentity(); 51 void restoreCallingIdentity(int64_t token); 52 53 void flushCommands(); 54 55 void joinThreadPool(bool isMain = true); 56 57 // Stop the local process. 58 void stopProcess(bool immediate = true); 59 60 status_t transact(int32_t handle, 61 uint32_t code, const Parcel& data, 62 Parcel* reply, uint32_t flags); 63 64 void incStrongHandle(int32_t handle); 65 void decStrongHandle(int32_t handle); 66 void incWeakHandle(int32_t handle); 67 void decWeakHandle(int32_t handle); 68 status_t attemptIncStrongHandle(int32_t handle); 69 static void expungeHandle(int32_t handle, IBinder* binder); 70 status_t requestDeathNotification( int32_t handle, 71 BpBinder* proxy); 72 status_t clearDeathNotification( int32_t handle, 73 BpBinder* proxy); 74 75 static void shutdown(); 76 77 // Call this to disable switching threads to background scheduling when 78 // receiving incoming IPC calls. This is specifically here for the 79 // Android system process, since it expects to have background apps calling 80 // in to it but doesn't want to acquire locks in its services while in 81 // the background. 82 static void disableBackgroundScheduling(bool disable); 83 84 private: 85 IPCThreadState(); 86 ~IPCThreadState(); 87 88 status_t sendReply(const Parcel& reply, uint32_t flags); 89 status_t waitForResponse(Parcel *reply, 90 status_t *acquireResult=NULL); 91 status_t talkWithDriver(bool doReceive=true); 92 status_t writeTransactionData(int32_t cmd, 93 uint32_t binderFlags, 94 int32_t handle, 95 uint32_t code, 96 const Parcel& data, 97 status_t* statusBuffer); 98 status_t executeCommand(int32_t command); 99 100 void clearCaller(); 101 102 static void threadDestructor(void *st); 103 static void freeBuffer(Parcel* parcel, 104 const uint8_t* data, size_t dataSize, 105 const size_t* objects, size_t objectsSize, 106 void* cookie); 107 108 const sp<ProcessState> mProcess; 109 const pid_t mMyThreadId; 110 Vector<BBinder*> mPendingStrongDerefs; 111 Vector<RefBase::weakref_type*> mPendingWeakDerefs; 112 113 Parcel mIn; 114 Parcel mOut; 115 status_t mLastError; 116 pid_t mCallingPid; 117 uid_t mCallingUid; 118 int32_t mStrictModePolicy; 119 int32_t mLastTransactionBinderFlags; 120 }; 121 122 }; // namespace android 123 124 // --------------------------------------------------------------------------- 125 126 #endif // ANDROID_IPC_THREAD_STATE_H 127