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Merge pull request #200 from Berrysoft/refactor/simplify-attacher
refactor: simplify attach logic
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,149 @@ | ||
| #[cfg(feature = "once_cell_try")] | ||
| use std::sync::OnceLock; | ||
| use std::{ | ||
| io, | ||
| os::windows::io::{AsRawHandle, RawHandle}, | ||
| time::Duration, | ||
| }; | ||
|
|
||
| use compio_log::*; | ||
| #[cfg(not(feature = "once_cell_try"))] | ||
| use once_cell::sync::OnceCell as OnceLock; | ||
| use windows_sys::Win32::System::IO::PostQueuedCompletionStatus; | ||
|
|
||
| use super::CompletionPort; | ||
| use crate::{syscall, Entry, Overlapped, RawFd}; | ||
|
|
||
| struct GlobalPort { | ||
| port: CompletionPort, | ||
| } | ||
|
|
||
| impl GlobalPort { | ||
| pub fn new() -> io::Result<Self> { | ||
| Ok(Self { | ||
| port: CompletionPort::new()?, | ||
| }) | ||
| } | ||
|
|
||
| pub fn attach(&self, fd: RawFd) -> io::Result<()> { | ||
| self.port.attach(fd) | ||
| } | ||
|
|
||
| pub fn post<T: ?Sized>( | ||
| &self, | ||
| res: io::Result<usize>, | ||
| optr: *mut Overlapped<T>, | ||
| ) -> io::Result<()> { | ||
| self.port.post(res, optr) | ||
| } | ||
|
|
||
| pub fn post_raw<T: ?Sized>(&self, optr: *const Overlapped<T>) -> io::Result<()> { | ||
| self.port.post_raw(optr) | ||
| } | ||
| } | ||
|
|
||
| impl AsRawHandle for GlobalPort { | ||
| fn as_raw_handle(&self) -> RawHandle { | ||
| self.port.as_raw_handle() | ||
| } | ||
| } | ||
|
|
||
| static IOCP_PORT: OnceLock<GlobalPort> = OnceLock::new(); | ||
|
|
||
| #[inline] | ||
| fn iocp_port() -> io::Result<&'static GlobalPort> { | ||
| IOCP_PORT.get_or_try_init(GlobalPort::new) | ||
| } | ||
|
|
||
| fn iocp_start() -> io::Result<()> { | ||
| let port = iocp_port()?; | ||
| std::thread::spawn(move || { | ||
| instrument!(compio_log::Level::TRACE, "iocp_start"); | ||
| loop { | ||
| for entry in port.port.poll_raw(None)? { | ||
| // Any thin pointer is OK because we don't use the type of opcode. | ||
| let overlapped_ptr: *mut Overlapped<()> = entry.lpOverlapped.cast(); | ||
| let overlapped = unsafe { &*overlapped_ptr }; | ||
| if let Err(_e) = syscall!( | ||
| BOOL, | ||
| PostQueuedCompletionStatus( | ||
| overlapped.driver as _, | ||
| entry.dwNumberOfBytesTransferred, | ||
| entry.lpCompletionKey, | ||
| entry.lpOverlapped, | ||
| ) | ||
| ) { | ||
| error!( | ||
| "fail to dispatch entry ({}, {}, {:p}) to driver {:p}: {:?}", | ||
| entry.dwNumberOfBytesTransferred, | ||
| entry.lpCompletionKey, | ||
| entry.lpOverlapped, | ||
| overlapped.driver, | ||
| _e | ||
| ); | ||
| } | ||
| } | ||
| } | ||
| #[allow(unreachable_code)] | ||
| io::Result::Ok(()) | ||
| }); | ||
| Ok(()) | ||
| } | ||
|
|
||
| static IOCP_INIT_ONCE: OnceLock<()> = OnceLock::new(); | ||
|
|
||
| pub struct Port { | ||
| port: CompletionPort, | ||
| global_port: &'static GlobalPort, | ||
| } | ||
|
|
||
| impl Port { | ||
| pub fn new() -> io::Result<Self> { | ||
| IOCP_INIT_ONCE.get_or_try_init(iocp_start)?; | ||
|
|
||
| Ok(Self { | ||
| port: CompletionPort::new()?, | ||
| global_port: iocp_port()?, | ||
| }) | ||
| } | ||
|
|
||
| pub fn attach(&mut self, fd: RawFd) -> io::Result<()> { | ||
| self.global_port.attach(fd) | ||
| } | ||
|
|
||
| pub fn handle(&self) -> PortHandle { | ||
| PortHandle::new(self.global_port) | ||
| } | ||
|
|
||
| pub fn poll(&self, timeout: Option<Duration>) -> io::Result<impl Iterator<Item = Entry> + '_> { | ||
| self.port.poll(timeout, None) | ||
| } | ||
| } | ||
|
|
||
| impl AsRawHandle for Port { | ||
| fn as_raw_handle(&self) -> RawHandle { | ||
| self.port.as_raw_handle() | ||
| } | ||
| } | ||
|
|
||
| pub struct PortHandle { | ||
| port: &'static GlobalPort, | ||
| } | ||
|
|
||
| impl PortHandle { | ||
| fn new(port: &'static GlobalPort) -> Self { | ||
| Self { port } | ||
| } | ||
|
|
||
| pub fn post<T: ?Sized>( | ||
| &self, | ||
| res: io::Result<usize>, | ||
| optr: *mut Overlapped<T>, | ||
| ) -> io::Result<()> { | ||
| self.port.post(res, optr) | ||
| } | ||
|
|
||
| pub fn post_raw<T: ?Sized>(&self, optr: *const Overlapped<T>) -> io::Result<()> { | ||
| self.port.post_raw(optr) | ||
| } | ||
| } |
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