68 lines
2 KiB
C++
68 lines
2 KiB
C++
#pragma once
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/*
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* Copyright (C) 2017 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <linux/usb/functionfs.h>
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#include <liburing.h>
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#include <atomic>
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#include <condition_variable>
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#include <memory>
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#include <mutex>
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#include <vector>
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#include <android-base/unique_fd.h>
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#include <asyncio/AsyncIO.h>
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struct aio_block {
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std::vector<struct iocb> iocb;
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std::vector<struct iocb*> iocbs;
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std::vector<struct io_event> events;
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aio_context_t ctx;
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int num_submitted;
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int fd;
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};
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int getMaxPacketSize(int ffs_fd);
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enum class AIOType { SYNC_IO, AIO, IO_URING };
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struct usb_handle {
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std::condition_variable notify;
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std::mutex lock;
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bool open_new_connection = true;
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int (*write)(usb_handle* h, const void* data, int len);
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int (*read)(usb_handle* h, void* data, int len, bool allow_partial);
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void (*close)(usb_handle* h);
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// FunctionFS
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android::base::unique_fd control;
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android::base::unique_fd bulk_out; // "out" from the host's perspective => source for adbd
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android::base::unique_fd bulk_in; // "in" from the host's perspective => sink for adbd
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// Access to these blocks is very not thread safe. Have one block for each of the
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// read and write threads.
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struct aio_block read_aiob;
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struct aio_block write_aiob;
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io_uring ring;
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size_t io_size;
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AIOType aio_type;
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};
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std::unique_ptr<usb_handle> create_usb_handle(unsigned num_bufs, unsigned io_size);
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