NOTICE

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async_simple
Copyright (c) 2019-2022, Alibaba Group Holding Limited
Licensed under the Apache License, Version 2.0
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This product contains various third-party components under other open source licenses.
This section summarizes those components and their licenses.
Apache Software Foundation License 2.0
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async_simple/MoveWrapper.h
async_simple/Try.h
async_simple/uthread/internal/thread.cc  
async_simple/uthread/internal/thread.h  
async_simple/uthread/internal/thread_impl.h

Apache-2.0 WITH LLVM-exception
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async_simple/experimental/coroutine.h

Boost Software License, Version 1.0
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async_simple/uthread/internal/jump_arm64_aapcs_elf_gas.S
async_simple/uthread/internal/jump_x86_64_sysv_elf_gas.S 
async_simple/uthread/internal/make_arm64_aapcs_elf_gas.S 
async_simple/uthread/internal/make_x86_64_sysv_elf_gas.S 
async_simple/uthread/internal/ontop_arm64_aapcs_elf_gas.S 
async_simple/uthread/internal/ontop_x86_64_sysv_elf_gas.S

MIT LICENSE
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async_simple/coro/Mutex.h

demo_example/asio
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Copyright (c) 2003-2021 Christopher M. Kohlhoff (chris at kohlhoff dot com)

Distributed under the Boost Software License, Version 1.0. (See accompanying
file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)

=================================================================== 
The Future/Promise, Lazy and other components in this library borrow various ideas from folly.
The http in demo_example borrows ideas from the example in the asio library, too.