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demo for rust asynchronous io: from mio to stackless coroutine

License: MIT License

Rust 100.00%

async-await asynchronous coroutine rust

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Could not compile `asyncio`

OS: centos7

[weiby@login async_server]$ cargo --version
cargo 1.34.0-nightly (b33ce7fc9 2019-02-19)
[weiby@login async_server]$ rustc --version
rustc 1.34.0-nightly (e1c6d0057 2019-02-22)

[weiby@login async-io-demo]$ cargo run --example async-echo
   Compiling asyncio v0.1.0 (/share/home/weiby/code/rust/async-io-demo)
error[E0432]: unresolved imports `std::task::LocalWaker`, `std::task::UnsafeWake`
  --> src/executor.rs:12:23
   |
12 | use std::task::{self, LocalWaker, UnsafeWake, Waker};
   |                       ^^^^^^^^^^  ^^^^^^^^^^ no `UnsafeWake` in `task`
   |                       |
   |                       no `LocalWaker` in `task`

error[E0432]: unresolved import `std::task::LocalWaker`
  --> src/fs_future.rs:10:23
   |
10 | use std::task::{self, LocalWaker};
   |                       ^^^^^^^^^^ no `LocalWaker` in `task`

warning: unused import: `Cell`
 --> src/executor.rs:5:17
  |
5 | use std::cell::{Cell, RefCell};
  |                 ^^^^
  |
  = note: #[warn(unused_imports)] on by default

error: aborting due to 2 previous errors

For more information about this error, try `rustc --explain E0432`.
error: Could not compile `asyncio`.

To learn more, run the command again with --verbose.

Most if not all examples crash

I have only tested this on windows. async-echo example

thread 'main' panicked at 'already borrowed: BorrowMutError', src\libcore\result.rs:997:5
stack backtrace:
   0: std::sys::windows::backtrace::set_frames
             at /rustc/e2f221c75932de7a29845c8d6f1f73536ad00c41\/src\libstd\sys\windows\backtrace\mod.rs:94
   1: std::sys::windows::backtrace::unwind_backtrace
             at /rustc/e2f221c75932de7a29845c8d6f1f73536ad00c41\/src\libstd\sys\windows\backtrace\mod.rs:81
   2: std::sys_common::backtrace::_print
             at /rustc/e2f221c75932de7a29845c8d6f1f73536ad00c41\/src\libstd\sys_common\backtrace.rs:70
   3: std::sys_common::backtrace::print
             at /rustc/e2f221c75932de7a29845c8d6f1f73536ad00c41\/src\libstd\sys_common\backtrace.rs:58
   4: std::panicking::default_hook::{{closure}}
             at /rustc/e2f221c75932de7a29845c8d6f1f73536ad00c41\/src\libstd\panicking.rs:200
   5: std::panicking::default_hook
             at /rustc/e2f221c75932de7a29845c8d6f1f73536ad00c41\/src\libstd\panicking.rs:215
   6: std::panicking::rust_panic_with_hook
             at /rustc/e2f221c75932de7a29845c8d6f1f73536ad00c41\/src\libstd\panicking.rs:478
   7: std::panicking::continue_panic_fmt
             at /rustc/e2f221c75932de7a29845c8d6f1f73536ad00c41\/src\libstd\panicking.rs:385
   8: std::panicking::rust_begin_panic
             at /rustc/e2f221c75932de7a29845c8d6f1f73536ad00c41\/src\libstd\panicking.rs:312
   9: core::panicking::panic_fmt
             at /rustc/e2f221c75932de7a29845c8d6f1f73536ad00c41\/src\libcore\panicking.rs:85
  10: core::result::unwrap_failed<core::cell::BorrowMutError>
             at /rustc/e2f221c75932de7a29845c8d6f1f73536ad00c41\src\libcore\macros.rs:16
  11: core::result::Result<core::cell::RefMut<slab::Slab<asyncio::executor::Task>>, core::cell::BorrowMutError>::expect<core::cell::RefMut<slab::Slab<asyncio::executor::Task>>,core::cell::BorrowMutError>
             at /rustc/e2f221c75932de7a29845c8d6f1f73536ad00c41\src\libcore\result.rs:825
  12: core::cell::RefCell<slab::Slab<asyncio::executor::Task>>::borrow_mut<slab::Slab<asyncio::executor::Task>>
             at /rustc/e2f221c75932de7a29845c8d6f1f73536ad00c41\src\libcore\cell.rs:876
  13: asyncio::executor::spawn::{{closure}}<std::future::GenFuture<generator>>
             at .\src\executor.rs:239
  14: std::thread::local::LocalKey<asyncio::executor::Executor>::try_with<asyncio::executor::Executor,closure,core::result::Result<(), failure::error::Error>>
             at /rustc/e2f221c75932de7a29845c8d6f1f73536ad00c41\src\libstd\thread\local.rs:299
  15: std::thread::local::LocalKey<asyncio::executor::Executor>::with<asyncio::executor::Executor,closure,core::result::Result<(), failure::error::Error>>
             at /rustc/e2f221c75932de7a29845c8d6f1f73536ad00c41\src\libstd\thread\local.rs:245
  16: asyncio::executor::spawn<std::future::GenFuture<generator>>
             at .\src\executor.rs:224
  17: async_echo::main::{{closure}}
             at .\examples\async-echo.rs:18
  18: std::future::{{impl}}::poll::{{closure}}<generator>
             at /rustc/e2f221c75932de7a29845c8d6f1f73536ad00c41\src\libstd\future.rs:36
  19: std::future::set_task_waker<closure,core::task::poll::Poll<core::result::Result<(), failure::error::Error>>>
             at /rustc/e2f221c75932de7a29845c8d6f1f73536ad00c41\src\libstd\future.rs:67
  20: std::future::{{impl}}::poll<generator>
             at /rustc/e2f221c75932de7a29845c8d6f1f73536ad00c41\src\libstd\future.rs:36
  21: asyncio::executor::block_on::{{closure}}<core::result::Result<(), failure::error::Error>,std::future::GenFuture<generator>>
             at .\src\executor.rs:177
  22: std::thread::local::LocalKey<asyncio::executor::Executor>::try_with<asyncio::executor::Executor,closure,core::result::Result<core::result::Result<(), failure::error::Error>, failure::error::Error>>
             at /rustc/e2f221c75932de7a29845c8d6f1f73536ad00c41\src\libstd\thread\local.rs:299
  23: std::thread::local::LocalKey<asyncio::executor::Executor>::with<asyncio::executor::Executor,closure,core::result::Result<core::result::Result<(), failure::error::Error>, failure::error::Error>>
             at /rustc/e2f221c75932de7a29845c8d6f1f73536ad00c41\src\libstd\thread\local.rs:245
  24: asyncio::executor::block_on<core::result::Result<(), failure::error::Error>,std::future::GenFuture<generator>>
             at .\src\executor.rs:156
  25: async_echo::main
             at .\examples\async-echo.rs:12
  26: std::rt::lang_start::{{closure}}<core::result::Result<(), failure::error::Error>>
             at /rustc/e2f221c75932de7a29845c8d6f1f73536ad00c41\src\libstd\rt.rs:64
  27: std::rt::lang_start_internal::{{closure}}
             at /rustc/e2f221c75932de7a29845c8d6f1f73536ad00c41\/src\libstd\rt.rs:49
  28: std::panicking::try::do_call<closure,i32>
             at /rustc/e2f221c75932de7a29845c8d6f1f73536ad00c41\/src\libstd\panicking.rs:297
  29: panic_unwind::__rust_maybe_catch_panic
             at /rustc/e2f221c75932de7a29845c8d6f1f73536ad00c41\/src\libpanic_unwind\lib.rs:92
  30: std::panicking::try
             at /rustc/e2f221c75932de7a29845c8d6f1f73536ad00c41\/src\libstd\panicking.rs:276
  31: std::panic::catch_unwind
             at /rustc/e2f221c75932de7a29845c8d6f1f73536ad00c41\/src\libstd\panic.rs:388
  32: std::rt::lang_start_internal
             at /rustc/e2f221c75932de7a29845c8d6f1f73536ad00c41\/src\libstd\rt.rs:48
  33: std::rt::lang_start<core::result::Result<(), failure::error::Error>>
             at /rustc/e2f221c75932de7a29845c8d6f1f73536ad00c41\src\libstd\rt.rs:64
  34: main
  35: invoke_main
             at d:\agent\_work\1\s\src\vctools\crt\vcstartup\src\startup\exe_common.inl:78
  36: __scrt_common_main_seh
             at d:\agent\_work\1\s\src\vctools\crt\vcstartup\src\startup\exe_common.inl:288
  37: BaseThreadInitThunk
  38: RtlUserThreadStart
error: process didn't exit successfully: `target\debug\examples\async-echo.exe` (exit code: 101)

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