1 #pragma once 2 3 /* 4 * Copyright (C) 2017 The Android Open Source Project 5 * 6 * Licensed under the Apache License, Version 2.0 (the "License"); 7 * you may not use this file except in compliance with the License. 8 * You may obtain a copy of the License at 9 * 10 * http://www.apache.org/licenses/LICENSE-2.0 11 * 12 * Unless required by applicable law or agreed to in writing, software 13 * distributed under the License is distributed on an "AS IS" BASIS, 14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 15 * See the License for the specific language governing permissions and 16 * limitations under the License. 17 */ 18 19 #include <atomic> 20 #include <condition_variable> 21 #include <mutex> 22 #include <vector> 23 24 #include <android-base/unique_fd.h> 25 #include <asyncio/AsyncIO.h> 26 27 struct aio_block { 28 std::vector<struct iocb> iocb; 29 std::vector<struct iocb*> iocbs; 30 std::vector<struct io_event> events; 31 aio_context_t ctx; 32 int num_submitted; 33 int fd; 34 }; 35 36 struct usb_handle { usb_handleusb_handle37 usb_handle() : kicked(false) { 38 } 39 40 std::condition_variable notify; 41 std::mutex lock; 42 std::atomic<bool> kicked; 43 bool open_new_connection = true; 44 45 int (*write)(usb_handle* h, const void* data, int len); 46 int (*read)(usb_handle* h, void* data, int len, bool allow_partial); 47 void (*kick)(usb_handle* h); 48 void (*close)(usb_handle* h); 49 50 // FunctionFS 51 android::base::unique_fd control; 52 android::base::unique_fd bulk_out; // "out" from the host's perspective => source for adbd 53 android::base::unique_fd bulk_in; // "in" from the host's perspective => sink for adbd 54 55 // Access to these blocks is very not thread safe. Have one block for each of the 56 // read and write threads. 57 struct aio_block read_aiob; 58 struct aio_block write_aiob; 59 60 bool reads_zero_packets; 61 size_t io_size; 62 }; 63 64 usb_handle *create_usb_handle(unsigned num_bufs, unsigned io_size); 65 bool open_functionfs(android::base::unique_fd* control, android::base::unique_fd* bulk_out, 66 android::base::unique_fd* bulk_in); 67