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