Steven Moreland | 2e87adc | 2018-08-20 19:47:00 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2018 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 | #include <android-base/logging.h> |
| 18 | #include <android/binder_manager.h> |
| 19 | #include <iface/iface.h> |
| 20 | |
Steven Moreland | 507547f | 2018-11-06 15:58:05 -0800 | [diff] [blame^] | 21 | #include <android/binder_auto_utils.h> |
| 22 | |
Steven Moreland | 2e87adc | 2018-08-20 19:47:00 -0700 | [diff] [blame] | 23 | using ::android::sp; |
| 24 | using ::android::wp; |
| 25 | |
| 26 | const char* IFoo::kSomeInstanceName = "libbinder_ndk-test-IFoo"; |
Steven Moreland | 507547f | 2018-11-06 15:58:05 -0800 | [diff] [blame^] | 27 | const char* IFoo::kInstanceNameToDieFor = "libbinder_ndk-test-IFoo-to-die"; |
Steven Moreland | 2e87adc | 2018-08-20 19:47:00 -0700 | [diff] [blame] | 28 | const char* kIFooDescriptor = "my-special-IFoo-class"; |
| 29 | |
| 30 | struct IFoo_Class_Data { |
| 31 | sp<IFoo> foo; |
| 32 | }; |
| 33 | |
| 34 | void* IFoo_Class_onCreate(void* args) { |
| 35 | IFoo_Class_Data* foo = static_cast<IFoo_Class_Data*>(args); |
| 36 | // This is a foo, but we're currently not verifying that. So, the method newLocalBinder is |
| 37 | // coupled with this. |
| 38 | return static_cast<void*>(foo); |
| 39 | } |
| 40 | |
| 41 | void IFoo_Class_onDestroy(void* userData) { |
| 42 | delete static_cast<IFoo_Class_Data*>(userData); |
| 43 | } |
| 44 | |
| 45 | binder_status_t IFoo_Class_onTransact(AIBinder* binder, transaction_code_t code, const AParcel* in, |
| 46 | AParcel* out) { |
Steven Moreland | 5d62e44 | 2018-09-13 15:01:02 -0700 | [diff] [blame] | 47 | binder_status_t stat = STATUS_FAILED_TRANSACTION; |
Steven Moreland | 2e87adc | 2018-08-20 19:47:00 -0700 | [diff] [blame] | 48 | |
| 49 | sp<IFoo> foo = static_cast<IFoo_Class_Data*>(AIBinder_getUserData(binder))->foo; |
| 50 | CHECK(foo != nullptr) << "Transaction made on already deleted object"; |
| 51 | |
| 52 | switch (code) { |
| 53 | case IFoo::DOFOO: { |
| 54 | int32_t valueIn; |
Steven Moreland | 507547f | 2018-11-06 15:58:05 -0800 | [diff] [blame^] | 55 | int32_t valueOut; |
Steven Moreland | 2e87adc | 2018-08-20 19:47:00 -0700 | [diff] [blame] | 56 | stat = AParcel_readInt32(in, &valueIn); |
Steven Moreland | 5d62e44 | 2018-09-13 15:01:02 -0700 | [diff] [blame] | 57 | if (stat != STATUS_OK) break; |
Steven Moreland | 507547f | 2018-11-06 15:58:05 -0800 | [diff] [blame^] | 58 | stat = foo->doubleNumber(valueIn, &valueOut); |
| 59 | if (stat != STATUS_OK) break; |
Steven Moreland | 2e87adc | 2018-08-20 19:47:00 -0700 | [diff] [blame] | 60 | stat = AParcel_writeInt32(out, valueOut); |
| 61 | break; |
| 62 | } |
Steven Moreland | 507547f | 2018-11-06 15:58:05 -0800 | [diff] [blame^] | 63 | case IFoo::DIE: { |
| 64 | stat = foo->die(); |
| 65 | break; |
| 66 | } |
Steven Moreland | 2e87adc | 2018-08-20 19:47:00 -0700 | [diff] [blame] | 67 | } |
| 68 | |
| 69 | return stat; |
| 70 | } |
| 71 | |
| 72 | AIBinder_Class* IFoo::kClass = AIBinder_Class_define(kIFooDescriptor, IFoo_Class_onCreate, |
| 73 | IFoo_Class_onDestroy, IFoo_Class_onTransact); |
| 74 | |
| 75 | class BpFoo : public IFoo { |
Steven Moreland | 6cf66ac | 2018-11-02 18:14:54 -0700 | [diff] [blame] | 76 | public: |
Steven Moreland | 2e87adc | 2018-08-20 19:47:00 -0700 | [diff] [blame] | 77 | BpFoo(AIBinder* binder) : mBinder(binder) {} |
| 78 | virtual ~BpFoo() { AIBinder_decStrong(mBinder); } |
| 79 | |
Steven Moreland | 507547f | 2018-11-06 15:58:05 -0800 | [diff] [blame^] | 80 | virtual binder_status_t doubleNumber(int32_t in, int32_t* out) { |
| 81 | binder_status_t stat = STATUS_OK; |
| 82 | |
Steven Moreland | 2e87adc | 2018-08-20 19:47:00 -0700 | [diff] [blame] | 83 | AParcel* parcelIn; |
Steven Moreland | 507547f | 2018-11-06 15:58:05 -0800 | [diff] [blame^] | 84 | stat = AIBinder_prepareTransaction(mBinder, &parcelIn); |
| 85 | if (stat != STATUS_OK) return stat; |
Steven Moreland | 2e87adc | 2018-08-20 19:47:00 -0700 | [diff] [blame] | 86 | |
Steven Moreland | 507547f | 2018-11-06 15:58:05 -0800 | [diff] [blame^] | 87 | stat = AParcel_writeInt32(parcelIn, in); |
| 88 | if (stat != STATUS_OK) return stat; |
Steven Moreland | 2e87adc | 2018-08-20 19:47:00 -0700 | [diff] [blame] | 89 | |
Steven Moreland | 507547f | 2018-11-06 15:58:05 -0800 | [diff] [blame^] | 90 | ::ndk::ScopedAParcel parcelOut; |
| 91 | stat = AIBinder_transact(mBinder, IFoo::DOFOO, &parcelIn, parcelOut.getR(), 0 /*flags*/); |
| 92 | if (stat != STATUS_OK) return stat; |
Steven Moreland | 2e87adc | 2018-08-20 19:47:00 -0700 | [diff] [blame] | 93 | |
Steven Moreland | 507547f | 2018-11-06 15:58:05 -0800 | [diff] [blame^] | 94 | stat = AParcel_readInt32(parcelOut.get(), out); |
| 95 | if (stat != STATUS_OK) return stat; |
Steven Moreland | 2e87adc | 2018-08-20 19:47:00 -0700 | [diff] [blame] | 96 | |
Steven Moreland | 507547f | 2018-11-06 15:58:05 -0800 | [diff] [blame^] | 97 | return stat; |
| 98 | } |
Steven Moreland | caa776c | 2018-09-04 13:48:11 -0700 | [diff] [blame] | 99 | |
Steven Moreland | 507547f | 2018-11-06 15:58:05 -0800 | [diff] [blame^] | 100 | virtual binder_status_t die() { |
| 101 | binder_status_t stat = STATUS_OK; |
| 102 | |
| 103 | AParcel* parcelIn; |
| 104 | stat = AIBinder_prepareTransaction(mBinder, &parcelIn); |
| 105 | |
| 106 | ::ndk::ScopedAParcel parcelOut; |
| 107 | stat = AIBinder_transact(mBinder, IFoo::DIE, &parcelIn, parcelOut.getR(), 0 /*flags*/); |
| 108 | |
| 109 | return stat; |
Steven Moreland | 2e87adc | 2018-08-20 19:47:00 -0700 | [diff] [blame] | 110 | } |
| 111 | |
Steven Moreland | 6cf66ac | 2018-11-02 18:14:54 -0700 | [diff] [blame] | 112 | private: |
Steven Moreland | 2e87adc | 2018-08-20 19:47:00 -0700 | [diff] [blame] | 113 | // Always assumes one refcount |
| 114 | AIBinder* mBinder; |
| 115 | }; |
| 116 | |
| 117 | IFoo::~IFoo() { |
Steven Moreland | 9b80e28 | 2018-09-19 13:57:23 -0700 | [diff] [blame] | 118 | AIBinder_Weak_delete(mWeakBinder); |
Steven Moreland | 2e87adc | 2018-08-20 19:47:00 -0700 | [diff] [blame] | 119 | } |
| 120 | |
| 121 | binder_status_t IFoo::addService(const char* instance) { |
| 122 | AIBinder* binder = nullptr; |
| 123 | |
| 124 | if (mWeakBinder != nullptr) { |
| 125 | // one strong ref count of binder |
| 126 | binder = AIBinder_Weak_promote(mWeakBinder); |
| 127 | } |
| 128 | if (binder == nullptr) { |
| 129 | // or one strong refcount here |
| 130 | binder = AIBinder_new(IFoo::kClass, static_cast<void*>(new IFoo_Class_Data{this})); |
| 131 | if (mWeakBinder != nullptr) { |
Steven Moreland | 9b80e28 | 2018-09-19 13:57:23 -0700 | [diff] [blame] | 132 | AIBinder_Weak_delete(mWeakBinder); |
Steven Moreland | 2e87adc | 2018-08-20 19:47:00 -0700 | [diff] [blame] | 133 | } |
| 134 | mWeakBinder = AIBinder_Weak_new(binder); |
| 135 | } |
| 136 | |
| 137 | binder_status_t status = AServiceManager_addService(binder, instance); |
| 138 | // Strong references we care about kept by remote process |
| 139 | AIBinder_decStrong(binder); |
| 140 | return status; |
| 141 | } |
| 142 | |
Steven Moreland | 507547f | 2018-11-06 15:58:05 -0800 | [diff] [blame^] | 143 | sp<IFoo> IFoo::getService(const char* instance, AIBinder** outBinder) { |
Steven Moreland | 6cf66ac | 2018-11-02 18:14:54 -0700 | [diff] [blame] | 144 | AIBinder* binder = AServiceManager_getService(instance); // maybe nullptr |
Steven Moreland | 2e87adc | 2018-08-20 19:47:00 -0700 | [diff] [blame] | 145 | if (binder == nullptr) { |
| 146 | return nullptr; |
| 147 | } |
| 148 | |
Steven Moreland | 71cddc3 | 2018-08-30 23:39:22 -0700 | [diff] [blame] | 149 | if (!AIBinder_associateClass(binder, IFoo::kClass)) { |
| 150 | AIBinder_decStrong(binder); |
| 151 | return nullptr; |
| 152 | } |
| 153 | |
Steven Moreland | 507547f | 2018-11-06 15:58:05 -0800 | [diff] [blame^] | 154 | if (outBinder != nullptr) { |
| 155 | AIBinder_incStrong(binder); |
| 156 | *outBinder = binder; |
| 157 | } |
| 158 | |
Steven Moreland | 2e87adc | 2018-08-20 19:47:00 -0700 | [diff] [blame] | 159 | if (AIBinder_isRemote(binder)) { |
Steven Moreland | 6cf66ac | 2018-11-02 18:14:54 -0700 | [diff] [blame] | 160 | sp<IFoo> ret = new BpFoo(binder); // takes ownership of binder |
Steven Moreland | 2e87adc | 2018-08-20 19:47:00 -0700 | [diff] [blame] | 161 | return ret; |
| 162 | } |
| 163 | |
| 164 | IFoo_Class_Data* data = static_cast<IFoo_Class_Data*>(AIBinder_getUserData(binder)); |
| 165 | |
Steven Moreland | 6cf66ac | 2018-11-02 18:14:54 -0700 | [diff] [blame] | 166 | CHECK(data != nullptr); // always created with non-null data |
Steven Moreland | 2e87adc | 2018-08-20 19:47:00 -0700 | [diff] [blame] | 167 | |
| 168 | sp<IFoo> ret = data->foo; |
| 169 | |
| 170 | AIBinder* held = AIBinder_Weak_promote(ret->mWeakBinder); |
| 171 | CHECK(held == binder); |
| 172 | AIBinder_decStrong(held); |
| 173 | |
Steven Moreland | 2e87adc | 2018-08-20 19:47:00 -0700 | [diff] [blame] | 174 | AIBinder_decStrong(binder); |
| 175 | return ret; |
| 176 | } |