| /* |
| * 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 |
| |
| namespace android { |
| |
| #pragma clang diagnostic push |
| #pragma clang diagnostic error "-Wpadded" |
| |
| enum : uint32_t { |
| /** |
| * follows is RpcWireTransaction, if flags != oneway, reply w/ RPC_COMMAND_REPLY expected |
| */ |
| RPC_COMMAND_TRANSACT = 0, |
| /** |
| * follows is RpcWireReply |
| */ |
| RPC_COMMAND_REPLY, |
| /** |
| * follows is RpcWireAddress |
| * |
| * note - this in the protocol directly instead of as a 'special |
| * transaction' in order to keep it as lightweight as possible (we don't |
| * want to create a 'Parcel' object for every decref) |
| */ |
| RPC_COMMAND_DEC_STRONG, |
| }; |
| |
| /** |
| * These commands are used when the address in an RpcWireTransaction is zero'd |
| * out (no address). This allows the transact/reply flow to be used for |
| * additional server commands, without making the protocol for |
| * transactions/replies more complicated. |
| */ |
| enum : uint32_t { |
| RPC_SPECIAL_TRANSACT_GET_ROOT = 0, |
| RPC_SPECIAL_TRANSACT_GET_MAX_THREADS = 1, |
| }; |
| |
| // serialization is like: |
| // |RpcWireHeader|struct desginated by 'command'| (over and over again) |
| |
| struct RpcWireHeader { |
| uint32_t command; // RPC_COMMAND_* |
| uint32_t bodySize; |
| |
| uint32_t reserved[2]; |
| }; |
| |
| struct RpcWireAddress { |
| uint8_t address[32]; |
| }; |
| |
| struct RpcWireTransaction { |
| RpcWireAddress address; |
| uint32_t code; |
| uint32_t flags; |
| |
| uint64_t asyncNumber; |
| |
| uint32_t reserved[4]; |
| |
| uint8_t data[0]; |
| }; |
| |
| struct RpcWireReply { |
| int32_t status; // transact return |
| uint8_t data[0]; |
| }; |
| |
| #pragma clang diagnostic pop |
| |
| } // namespace android |