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#pragma once
/*
* Copyright (C) 2017 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.
*/
#include <linux/usb/functionfs.h>
#include <liburing.h>
#include <atomic>
#include <condition_variable>
#include <memory>
#include <mutex>
#include <vector>
#include <android-base/unique_fd.h>
#include <asyncio/AsyncIO.h>
struct aio_block {
std::vector<struct iocb> iocb;
std::vector<struct iocb*> iocbs;
std::vector<struct io_event> events;
aio_context_t ctx;
int num_submitted;
int fd;
};
int getMaxPacketSize(int ffs_fd);
enum class AIOType { SYNC_IO, AIO, IO_URING };
struct usb_handle {
std::condition_variable notify;
std::mutex lock;
bool open_new_connection = true;
int (*write)(usb_handle* h, const void* data, int len);
int (*read)(usb_handle* h, void* data, int len, bool allow_partial);
void (*close)(usb_handle* h);
// FunctionFS
android::base::unique_fd control;
android::base::unique_fd bulk_out; // "out" from the host's perspective => source for adbd
android::base::unique_fd bulk_in; // "in" from the host's perspective => sink for adbd
// Access to these blocks is very not thread safe. Have one block for each of the
// read and write threads.
struct aio_block read_aiob;
struct aio_block write_aiob;
io_uring ring;
size_t io_size;
AIOType aio_type;
};
std::unique_ptr<usb_handle> create_usb_handle(unsigned num_bufs, unsigned io_size);
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