| /* |
| * Copyright (C) 2020 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #pragma once |
| |
| // WARNING: DO NOT USE THIS |
| // You should: |
| // - have code know how it is handling things. Pass in caller information rather |
| // than assuming that code is running in a specific global context |
| // - use AIDL exclusively in your stack (HIDL is no longer required anywhere) |
| |
| #include <binder/IPCThreadState.h> |
| #include <hwbinder/IPCThreadState.h> |
| |
| namespace android { |
| |
| enum class BinderCallType { |
| NONE, |
| BINDER, |
| HWBINDER, |
| }; |
| |
| // Based on where we are in recursion of nested binder/hwbinder calls, determine |
| // which one we are closer to. |
| inline static BinderCallType getCurrentServingCall() { |
| const void* hwbinderSp = android::hardware::IPCThreadState::self()->getServingStackPointer(); |
| const void* binderSp = android::IPCThreadState::self()->getServingStackPointer(); |
| |
| if (hwbinderSp == nullptr && binderSp == nullptr) return BinderCallType::NONE; |
| if (hwbinderSp == nullptr) return BinderCallType::BINDER; |
| if (binderSp == nullptr) return BinderCallType::HWBINDER; |
| |
| if (hwbinderSp < binderSp) return BinderCallType::HWBINDER; |
| return BinderCallType::BINDER; |
| } |
| |
| } // namespace android |
