1884 lines
982 KiB
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1884 lines
982 KiB
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!<arch>
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/ 0 0 0 0 67236 `
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FL Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á` Á`
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‚ü_ZN107_$LT$mio..net..tcp..stream..TcpStream$u20$as$u20$core..convert..From$LT$std..os..fd..owned..OwnedFd$GT$$GT$4from17ha0c993f502b931e0E _ZN3mio3net3tcp6stream9TcpStream8from_std17h63e5c6f011f9f860E _ZN113_$LT$std..os..unix..net..stream..UnixStream$u20$as$u20$core..convert..From$LT$std..os..fd..owned..OwnedFd$GT$$GT$4from17h91d0ef5568446796E _ZN153_$LT$core..result..Result$LT$T$C$F$GT$$u20$as$u20$core..ops..try_trait..FromResidual$LT$core..result..Result$LT$core..convert..Infallible$C$E$GT$$GT$$GT$13from_residual17h1f5a617438564589E _ZN153_$LT$core..result..Result$LT$T$C$F$GT$$u20$as$u20$core..ops..try_trait..FromResidual$LT$core..result..Result$LT$core..convert..Infallible$C$E$GT$$GT$$GT$13from_residual17h2231989977098905E _ZN153_$LT$core..result..Result$LT$T$C$F$GT$$u20$as$u20$core..ops..try_trait..FromResidual$LT$core..result..Result$LT$core..convert..Infallible$C$E$GT$$GT$$GT$13from_residual17h493a588fd8de9e1fE _ZN153_$LT$core..result..Result$LT$T$C$F$GT$$u20$as$u20$core..ops..try_trait..FromResidual$LT$core..result..Result$LT$core..convert..Infallible$C$E$GT$$GT$$GT$13from_residual17h5a74f6a74ecaa0fdE _ZN153_$LT$core..result..Result$LT$T$C$F$GT$$u20$as$u20$core..ops..try_trait..FromResidual$LT$core..result..Result$LT$core..convert..Infallible$C$E$GT$$GT$$GT$13from_residual17h679dc511848950f9E _ZN153_$LT$core..result..Result$LT$T$C$F$GT$$u20$as$u20$core..ops..try_trait..FromResidual$LT$core..result..Result$LT$core..convert..Infallible$C$E$GT$$GT$$GT$13from_residual17h6a72634dafe2e4fcE _ZN153_$LT$core..result..Result$LT$T$C$F$GT$$u20$as$u20$core..ops..try_trait..FromResidual$LT$core..result..Result$LT$core..convert..Infallible$C$E$GT$$GT$$GT$13from_residual17h9a68084b2ba23ec3E _ZN153_$LT$core..result..Result$LT$T$C$F$GT$$u20$as$u20$core..ops..try_trait..FromResidual$LT$core..result..Result$LT$core..convert..Infallible$C$E$GT$$GT$$GT$13from_residual17h9b815bcb18ffd161E _ZN153_$LT$core..result..Result$LT$T$C$F$GT$$u20$as$u20$core..ops..try_trait..FromResidual$LT$core..result..Result$LT$core..convert..Infallible$C$E$GT$$GT$$GT$13from_residual17ha164de9beaa8b4d3E _ZN153_$LT$core..result..Result$LT$T$C$F$GT$$u20$as$u20$core..ops..try_trait..FromResidual$LT$core..result..Result$LT$core..convert..Infallible$C$E$GT$$GT$$GT$13from_residual17ha370f83a22b6357eE _ZN153_$LT$core..result..Result$LT$T$C$F$GT$$u20$as$u20$core..ops..try_trait..FromResidual$LT$core..result..Result$LT$core..convert..Infallible$C$E$GT$$GT$$GT$13from_residual17ha38df0a8a7833fcfE _ZN153_$LT$core..result..Result$LT$T$C$F$GT$$u20$as$u20$core..ops..try_trait..FromResidual$LT$core..result..Result$LT$core..convert..Infallible$C$E$GT$$GT$$GT$13from_residual17ha7c6fe97d169bcb5E _ZN153_$LT$core..result..Result$LT$T$C$F$GT$$u20$as$u20$core..ops..try_trait..FromResidual$LT$core..result..Result$LT$core..convert..Infallible$C$E$GT$$GT$$GT$13from_resid
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mio-3e69f6f41f681717.mio.cf8714fa77959b71-cgu.0.rcgu.o/
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mio-3e69f6f41f681717.mio.cf8714fa77959b71-cgu.1.rcgu.o/
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mio-3e69f6f41f681717.mio.cf8714fa77959b71-cgu.2.rcgu.o/
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mio-3e69f6f41f681717.mio.cf8714fa77959b71-cgu.3.rcgu.o/
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lib.rmeta/ 0 0 0 644 428800 `
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ELF · €‰ @ @ GNU À rust
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׆ #rustc 1.96.0 (ac68faa20 2026-05-25)ÁÀ뉊 ]!ÜÛê(¹Þ—šên -5be7b69c3ff7b5b8Á íàÄTËŸ ÜJîÄ)'ß\¥! -3d1337db07d0b3aeÁ ¤²XctÔ'ÐÓ©z¨É½Ó -a4945860e1c53b00Á ¤°ð ¾ä-±($²ï=©Ã -7e98a21bfd32b0edÁ–�òÖÀH•‘P IÓHã#£ -055f30b747f859b6Á rustc_std_workspace_coreÁCçß^ò½èÝ$Çÿ+Cé -c4878ee60b2242c9Á ŸÃï+Ñ]ŠqB<ÏïW# -8dd1dd90e70d0b6aÁ miniz_oxideÁ€š»J(P>àö÷g\K -1eb618da2918ab7fÁ adler2ÁÆ;+Þ®5¥ÌýÝ°¦ÛLˆ -f7919172d268e069Á hashbrownÁPäV9ÒÆèÜ�"ÊÖVŽ\ -0fc2184a5da6723aÁ rustc_std_workspace_allocÁs&ØòØy¯s•bæ!‰ýŠ -97e4bf30be240674Á
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std_detectÁhŠBîÙºÌI®Ë�Å�š -9dbbf8346ba7ac8bÁ rustc_demangleÁûë9´Ç×@Œ�’ùXFº -f33013f239bf9f14Á cfg_ifÁÜLh�ž§Œaã¯>� -0a71c8f33a838301Á addr2lineÁ׎Þ!]8V$É@@T· -e618e6be60e87ba2Á gimliÁ¸
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°µ~Î1‹Ñt ðÁ€w -1f7768a68858f670Á objectÁ
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áPÃ?À¶¼QHJ¥� -914cd6a4dbe590d1Á memchrÁ›º«8Ór2Ù $¨ûib‚ -cf21ca6f2bb15dcdÁë
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‹ás «LÖ€îâƒ×ɯŒ -ee6f3747e38367f0Á–ù«< fÅþ¦®Ž
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žaa…Ý -54993f73e3057ce2Á hermitÁ4™ ú wasiÁ$‡ úŠ”ò â<à â <Ü Ž AsRawFdÁ<Áúî¤�Ž FromRawFdÁLÊúî "Ž RawFdÁ,Õúî:<¨ô,‚úî¤Òþ¸<ÚúþÖLãú<Âú•ÖLËúî£
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SocketAddrExtÁl9ú androidÁ¬£ testsÁ,þ%‚ $ó%¶ set_nonblockingÁ|ƒŒú aixÁŒ©‹ú illumosÁ¬¼‹ú solarisÁ¬Ó‹ú vitaÁ”ê‹ü¨‹U[ shellÁ,‚» os-pollÁ˜¿„¨¿ƒð¸<œ úî¤ì ð AsRawSocketÁ\Ï â <« ª AsFdÁ$Ø
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úîª
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úî68ªÖLó
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úîKMª IntoRawFdÁLþ
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úîikª OwnedFdÁ<‰
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úî…‡ªô,’
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úîšœªí \Ê
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â <
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ª AsSocketÁD×
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â ª BorrowedSocketÁtá
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â <>ª
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FromRawSocketÁlñ
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â []ª
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IntoRawSocketÁl€
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â z|ª OwnedSocketÁ\�
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â —™ª RawSocketÁLœ
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â ²´çŒ $§ úî¤ö ç¸< úîç¼ T¶ úî,.çÖL úîACçð LÍ úîVXçŽ
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<Ø úîkmçô,á úçí \™ â <ï çÓ
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t° â &(ç�lÀ â 8:ç¬lÏ â JLçË\Þ â \^çèLë â npÇŒ $Ú ú Ǹ<à úîǼ Té úî,.ÇÖLõ úîACÇð L€ úîVXÇŽ
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AtomicBoolÁT¹ ¬] * 1®DÅ ¼À * 2K ² †J * 3 DurationÁDÆ Ö * 4× Ú ¤, * 6¿²ß ¦ * 7ª,ñ i * 9Ï ø [ * :© 4ý † * ; ° ì D… À * < ±ÿ6,� É * = µÿ6 Ê * = µ\�WZJM=@03Œ¥ t§œ»ó ÔåçÕ×,éÊ̼¾®°—™„†|�Z ü˜8 5 Polls for readiness events on all registered values.Á Ñú üÕL I `Poll` allows a program to monitor a large number of [`event::Source`]s,Á ü¢O L waiting until one or more become "ready" for some class of operations; e.g.Á üòN K reading and writing. An event source is considered ready if it is possibleÁ üÁF C to immediately perform a corresponding operation; e.g. [`read`] orÁ tˆ [`write`].Á — ú ü› N K To use `Poll`, an `event::Source` must first be registered with the `Poll`Á üê H E instance using the [`register`] method on its associated `Register`,Á ü³
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7 4 [`write`]: ./net/struct.TcpStream.html#method.writeÁ ü³6 3 [`register`]: struct.Registry.html#method.registerÁ êú tî # ExamplesÁ ýú ü�= : A basic example -- establishing a `TcpStream` connection.Á ¿ú ,ÿ\ù ```Á äÖ # use std::error::Error;Á üó/ , # fn main() -> Result<(), Box<dyn Error>> {Á ü£- * use mio::{Events, Poll, Interest, Token};Á äÑ use mio::net::TcpStream;Á îú üò% " use std::net::{self, SocketAddr};Á ˜ú üœ* ' // Bind a server socket to connect to.Á üÇ2 / let addr: SocketAddr = "127.0.0.1:0".parse()?;Á üú/ , let server = net::TcpListener::bind(addr)?;Á ªú ü®M J // Construct a new `Poll` handle as well as the `Events` we'll store intoÁ üü let mut poll = Poll::new()?;Á ü�1 . let mut events = Events::with_capacity(1024);Á Ïú ÌÓ // Connect the streamÁ üí? < let mut stream = TcpStream::connect(server.local_addr()?)?;Á ú ü±& # // Register the stream with `Poll`Á üØ^ [ poll.registry().register(&mut stream, Token(0), Interest::READABLE | Interest::WRITABLE)?;Á ·ú ü»K H // Wait for the socket to become ready. This has to happen in a loop toÁ ü‡ // handle spurious wakeups.Á T§ loop {Á ü²& # poll.poll(&mut events, None)?;Á Ùú ôÝ for event in &events {Á üüA > if event.token() == Token(0) && event.is_writable() {Á ü¾O L // The socket connected (probably, it could still be a spuriousÁ ÔŽ // wakeup)Á ô© return Ok(());Á lÈ
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}Á LÖ }Á ,à }Á <æ # }Á <î„× öú Œú # PortabilityÁ Œú ü�L I Using `Poll` provides a portable interface across supported platforms asÁ üÝ> ; long as the caller takes the following into consideration:Á œú ¼ ### Spurious eventsÁ ¸ú ü¼E B [`Poll::poll`] may return readiness events even if the associatedÁ ü‚ E B event source is not actually ready. Given the same code, this mayÁ üÈ N K happen more on some platforms than others. It is important to never assumeÁ ü— J G that, just because a readiness event was received, that the associatedÁ üâ # operation will succeed as well.Á † ú üŠ L I If operation fails with [`WouldBlock`], then the caller should not treatÁ ü× N K this as an error, but instead should wait until another readiness event isÁ l¦
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received.Á ´ ú Ô¸ ### Draining readinessÁ Ó ú ü× K H Once a readiness event is received, the corresponding operation must beÁ ü£ N K performed repeatedly until it returns [`WouldBlock`]. Unless this is done,Á üò N K there is no guarantee that another readiness event will be delivered, evenÁ üÁ!5 2 if further data is received for the event source.Á ÷!ú üû!2 / [`WouldBlock`]: std::io::ErrorKind::WouldBlockÁ ®"ú ä²" ### Readiness operationsÁ Ï"ú üÓ"J G The only readiness operations that are guaranteed to be present on allÁ üž#N K supported platforms are [`readable`] and [`writable`]. All other readinessÁ üí#H E operations may have false negatives and as such should be consideredÁ ü¶$J G **hints**. This means that if a socket is registered with [`readable`]Á ü�%M J interest and either an error or close is received, a readiness event willÁ üÏ%G D be generated for the socket, but it **may** only include `readable`Á ü—&G D readiness. Also note that, given the potential for spurious events,Á üß&N K receiving a readiness event with `read_closed`, `write_closed`, or `error`Á ü®'J G doesn't actually mean that a `read` on the socket will return a resultÁ üù'! matching the readiness event.Á ›(ú üŸ(P M In other words, portable programs that explicitly check for [`read_closed`],Á üð(E B [`write_closed`], or [`error`] readiness should be doing so as anÁ ü¶)M J **optimization** and always be able to handle an error or close situationÁ ü„*. + when performing the actual read operation.Á ³*ú ü·*> ; [`readable`]: ./event/struct.Event.html#method.is_readableÁ üö*> ; [`writable`]: ./event/struct.Event.html#method.is_writableÁ üµ+8 5 [`error`]: ./event/struct.Event.html#method.is_errorÁ üî+D A [`read_closed`]: ./event/struct.Event.html#method.is_read_closedÁ ü³,F C [`write_closed`]: ./event/struct.Event.html#method.is_write_closedÁ ú,ú Üþ, ### Registering handlesÁ š-ú üž-H E Unless otherwise noted, it should be assumed that types implementingÁ üç-M J [`event::Source`] will never become ready unless they are registered withÁ \µ. `Poll`.Á Á.ú „Å.
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For example:Á Ö.ú ,–/\�/Àù äí/Ïù œŠ0 # use std::net;Á üž0/õù üÎ0% " use mio::{Poll, Interest, Token};Á äô0äú ì‘1 use std::net::SocketAddr;Á ä¯1 use std::time::Duration;Á ¤Ì1 use std::thread;Á á1ú üå15 2 let address: SocketAddr = "127.0.0.1:0".parse()?;Á ü›24 1 let listener = net::TcpListener::bind(address)?;Á üÐ2? < let mut sock = TcpStream::connect(listener.local_addr()?)?;Á �3ú ü”3* ' thread::sleep(Duration::from_secs(1));Á ¿3ú äÃ3 let poll = Poll::new()?;Á à3ú üä3N K // The connect is not guaranteed to have started until it is registered atÁ Œ³4 // this pointÁ üÅ4\ Y poll.registry().register(&mut sock, Token(0), Interest::READABLE | Interest::WRITABLE)?;Á „¢5
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# Ok(())Á <³5€… <»5„× Ã5ú ¼Ç5 ### Dropping `Poll`Á ß5ú üã5N K When the `Poll` instance is dropped it may cancel in-flight operations forÁ ü²6O L the registered [event sources], meaning that no further events for them mayÁ ü‚7P M be received. It also means operations on the registered event sources may noÁ üÓ7M J longer work. It is up to the user to keep the `Poll` instance alive whileÁ ü¡8, ) registered event sources are being used.Á Î8ú üÒ8. + [event sources]: ./event/trait.Source.htmlÁ �9ú ü…9& # ### Accessing raw fd/socket/handleÁ ¬9ú ü°9H E Mio makes it possible for many types to be converted into a raw fileÁ üù9N K descriptor (fd, Unix), socket (Windows) or handle (Windows). This makes itÁ üÈ:J G possible to support more operations on the type than Mio supports, forÁ ü“;L I example it makes [mio-aio] possible. However accessing t
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ŒÈ‘ú espidfÁ¤ã‘ú fuchsiaÁ¬�’ú haikuÁœ ’ú’ú hurdÁ”Û’ú ntoÁŒ÷’ú� ¬’“ú• ”±“ú cygwinÁ¤Í“úÁЬë“ü¾‘Èüº‘Íüý��üô�˜ ÉiG ¬+ G ä©”L¬” ƒ ƒ Éi F ¶” F
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I $š•× •l‚– „jKMOQST ü«µ‹ ü––; 8 Register an [`event::Source`] with the `Poll` instance.Á Ö–ú üÞ–J G Once registered, the `Poll` instance will monitor the event source forÁ ü—K H readiness state changes. When it notices a state change, it will returnÁ üý—F C a readiness event for the handle the next time [`poll`] is called.Á Șú üИ0 - See [`Poll`] docs for a high level overview.Á …™ú |�™ # ArgumentsÁ ¡™ú ü©™J G `source: &mut S: event::Source`: This is the source of events that theÁ üø™? < `Poll` instance should monitor for readiness state changes.Á ¼šú üÄšJ G `token: Token`: The caller picks a token to associate with the socket.Á ü“›J G When [`poll`] returns an event for the handle, this token is included.Á üâ›D A This allows the caller to map the event to its source. The tokenÁ ü«œE B associated with the `event::Source` can be changed at any time byÁ Üõœ calling [`reregister`].Á •�ú ü��E B See documentation on [`Token`] for an example showing how to pickÁ ¬ç� [`Token`] values.Á �žú ü‰žJ G `interest: Interest`: Specifies which operations `Poll` should monitorÁ üØžJ G for readiness. `Poll` will only return readiness events for operationsÁ ü§Ÿ specified by this argument.Á ËŸú üÓŸK H If a socket is registered with readable interest and the socket becomesÁ ü£ 6 3 writable, no event will be returned from [`poll`].Á Þ ú üæ L I The readiness interest for an `event::Source` can be changed at any timeÁ ô·¡ by calling [`reregister`].Á Ú¡ú \â¡Šã ò¡ú üú¡G D Callers must ensure that if a source being registered with a `Poll`Á üÆ¢H E instance was previously registered with that `Poll` instance, then aÁ ü“£E B call to [`deregister`] has already occurred. Consecutive calls toÁ üÝ£' $ `register` is unspecified behavior.Á ‰¤ú ü‘¤K H Unless otherwise specified, the caller should assume that once an eventÁ üá¤K H source is registered with a `Poll` instance, it is bound to that `Poll`Á ü±¥I F instance for the lifetime of the event source. This remains true evenÁ üÿ¥D A if the event source is deregistered from the poll instance usingÁ œÈ¦ [`deregister`].Á à¦ú üè¦0Âö ü�§* ' [`poll`]: struct.Poll.html#method.pollÁ ü̧: 7 [`reregister`]: struct.Registry.html#method.reregisterÁ ü‹¨: 7 [`deregister`]: struct.Registry.html#method.deregisterÁ üʨ [`Token`]: struct.Token.htmlÁ ï¨ú t÷¨Çø Š©ú ,Ω\È©Àù äªÏù œÎª™ž üæª/õù üš«-®ú äÌ«äú ìí«ÿž ü�¬' $ use std::time::{Duration, Instant};Á »¬ú üì Ýý è¬ú üð¬5ôŸ üª4³ üãA > let mut socket = TcpStream::connect(listener.local_addr()?)?;Á ©®ú ü±®& # // Register the socket with `poll`Á ìÜ®œí ¤þ® &mut socket,Á Œ—¯áí ü¯2ýí ä¯ú üì¯1‡þ ü¢° let start = Instant::now();Á üÆ°- * let timeout = Duration::from_millis(500);Á ø°ú T€±æ� ü�±& # let elapsed = start.elapsed();Á º±ú ü± if elapsed >= timeout {Á üæ±# // Connection timed outÁ ÔŽ² return Ok(());Á L²à„ »²ú üò* ' let remaining = timeout - elapsed;Á üò²1 . poll.poll(&mut events, Some(remaining))?;Á ¨³ú ô°³µ‚ üÓ³* ' if event.token() == Token(0) {Á ü‚´? < // Something (probably) happened on the socket.Á ôÆ´£„ lé´Ê„ Lû´à„ ,‰µò„ <“µ€… <Ÿµ„× D²µ ‡ ˆ ‡ „j ˆ ¤¦�qœh€§ J ¤ L L ¾µ J Î줦 »µ ¢¤¦ lŸ¶
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the poll.Á ºÑú üÂÑLþ› ü“Ò5Õœ ÍÒú üÕÒ? < A handle can be passed back to `register` after it has beenÁ ü™ÓH E deregistered; however, it must be passed back to the **same** `Poll`Á üæÓ4 1 instance, otherwise the behavior is unspecified.Á ŸÔú t§ÔÇø ºÔú ,þÔ\øÔÀù äÝÕÏù œþÕ™ž ü–Ö/õù üÊÖ-®ú äüÖäú ì�×ÿž ä¿×¥Ÿ à×ú üè× Ýý �Øú ü•Ø5ôŸ üÏØ4³ üˆÙAƒŽ ÎÙú üÖÙ&ÜŽ ì�Úœí ¤£Úš� Œ¼Úáí ìÒÚ²¡ ôÚú üüÚ- * poll.registry().deregister(&mut socket)?;Á ®Ûú ü¶Û1‡þ ìÛú üôÛG D // Set a timeout because this poll should never receive any events.Á üÀÜ: 7 poll.poll(&mut events, Some(Duration::from_secs(1)))?;Á üÿÜ assert!(events.is_empty());Á „£ÝŽ¤ <¸Ý€… <ÄÝ„× T×Ý ‹ Œ ‹ „j Œ ¤¦€§ J ¤ P P åÝ J �— âÝ “—l£Þ
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O¤¦$æÝŠ U%' üçà/ ü¦ß1 . Creates a new independently owned `Registry`.Á Üßú üäßI F Event sources registered with this `Registry` will be registered withÁ ü²à0 - the original `Registry` and `Poll` instance.ÁLîà � � „j Ö¿Ù¿ Ú¿« Û¿ˆ Ü¿ Ý¿Þ¿ˆ ‚†f|Â
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Z $çð<§ « Ó $à ¶ ÕÂ)D� ä Õ µÂ) å Õ µÂ+ × þ Õý, ó • ÕÖ- Ò £ Õý",™ û Õ �© 4Ì ü Õ �ª,ê ý Õ � ),Ì6 à Õ � Œ÷&DÍ ½ Õ �·(lª7 Ô Õ � ß·( Õ Õ � ßL° ,´ ÉÊÔÏ' ¨r^ ë ^ äð'$ó' �q¨r ] ]
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^ ¹ ø'L÷ úÁÐ¬É úŠ”à üÈ + üÄ 0 ü» ; ,û ÞÏ [ _ aÐD @ _ b ´ÿ6, É _ c µÿ6 Ê _ c µ¿²- ¦ _ d,fhY[HJ<(!T µrfh üÜB ̾ Create a new `Waker`.Á ã • • „j �qÖ¿Ù¿ Ú¿« Û¿ˆ Ü¿ Ý¿Þ¿ˆ ‚†f|Â
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f ÁDçÙ,ü<� f ç· g ÿ· g œ¸ g g f g ákµr ü§$ üÁ6 3 Wake up the [`Poll`] associated with this `Waker`.Á üú ô„ [`Poll`]: struct.Poll.htmlÁ$® – – µr €§ e ³ e
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h $´lƒ ü ( % Readiness event types and utilities.Á ,‹ j‚œý",† â «© 4¤ † ·8$¬ æ ®Ü4É ¢ ¯LM ,QiâÏ [ j lÿ6, É j m µÿ6 Ê j m µ× # ¤, j n,PRCED T¹ érpqrstuvwxy äí ôÊ Returns the event's token.Á,ô — — ér �q o ú o
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p $ûüÿ! ü¾: 7 Returns true if the event contains readable readiness.Á ýú \…Šã •ú ü�B ? Out-of-band (OOB) data also triggers readable events. But mostÁ üäB ? applications don't actually read OOB data, this could leave anÁ ü«= : application open to a Denial-of-Service (Dos) attack, seeÁ üíŒ ‰ <https://github.com/sandstorm-io/sandstorm-website/blob/58f93346028c0576e8147627667328eaaf4be9fa/_posts/2015-04-08-osx-security-bug.md>.Á üþL I However because Mio uses edge-triggers it will not result in an infiniteÁ üÏ+ ( loop as described in the article above.Á\† ˜ ˜ ér o ’ o
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q $“ üš
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! üÛ : 7 Returns true if the event contains writable readiness.Á\¡
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7 4 Returns true if the event contains error readiness.Á ² ú üº K H Error events occur when the socket enters an error state. In this case,Á üŠ I F the socket will also receive a readable or writable event. Reading orÁ üØ 2 / writing to the socket will result in an error.Á �
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K H Method is available on all platforms, but not all platforms trigger theÁ „ÿ
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error event.Á ”ú üœ< 9 The table below shows what flags are checked on what OS.Á Ýú üå' $ | [OS selector] | Flag(s) checked |Á ü‘' $ |---------------|-----------------|Á ü½' $ | [epoll] | `EPOLLERR` |Á üéI F | [kqueue] | `EV_ERROR` and `EV_EOF` with `fflags` set to `0`. |Á ·ú ü¿; 8 [OS selector]: ../struct.Poll.html#implementation-notesÁ üÿ?ÂË üÃH‹ÌD— š š ér o o
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s $¡üº $ üæ= : Returns true if the event contains read closed readiness.Á ¨ú \°Šã Àú üÈI F Read closed readiness can be expected after any of the following haveÁ l–
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occurred:Á ü¨? < * The local stream has shutdown the read half of its socketÁ üìI F * The local stream has shutdown both the read half and the write halfÁ œº of its socketÁ üÒJ G * The peer stream has shutdown the write half its socket; this sends aÁ ü¡= : `FIN` packet that has been received by the local streamÁ ãú üëH E Method is a best effort implementation. While some platforms may notÁ ü¸D A return readiness when read half is closed, it is guaranteed thatÁ ü�# false-positives will not occur.Á ©ú ü±<½Ø òú üú'�Ù ü¦'ÀÙ üÒ' $ | [epoll] | `EPOLLHUP`, or |Á üþ2 / | | `EPOLLIN` and `EPOLLRDHUP` |Á üµ' $ | [kqueue] | `EV_EOF` |Á áú üé;�Û ü©?ÂË üíH‹ÌtÁ › › ér o Ð o
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t $Ñ ü˜&% üœ > ; Returns true if the event contains write closed readiness.Á ß ú \ç Šã ÷ ú üÿ E B On [epoll] this is essentially a check for `EPOLLHUP` flag as theÁ üÉ J G local stream shutting down its write half does not trigger this event.Á ˜ ú ü D A On [kqueue] the local stream shutting down the write half of itsÁ üé # socket will trigger this event.Á ‘ ú ü™ Håà üæ E B return readiness when write half is closed, it is guaranteed thatÁ ü°!#…â Ø!ú üà!<½Ø ¡"ú ü©"'�Ù üÕ"'ÀÙ ü�#'ôâ ü#+ ( | | only `EPOLLERR`, or |Á üÝ#1 . | | `EPOLLOUT` and `EPOLLERR` |Á ü“$'áã ¿$ú üÇ$;�Û ü‡%?ÂË üË%H‹Ì|Ÿ& œ œ ér o ¯& o
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u $°&ü«,! üü&: 7 Returns true if the event contains priority readiness.Á »'ú \Ã'Šã Ó'ú üÛ'KÃ× œ«( priority event.Á Ã(ú üË(<½Ø Œ)ú ü”)'�Ù üÀ)'ÀÙ üì)' $ | [epoll] | `EPOLLPRI` |Á ü˜*' $ | [kqueue] | *Not supported* |Á Ä*ú üÌ*;�Û üŒ+?ÂË üÐ+H‹Ì\², � � ér o ¾, o
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v $¿,äÜ2 ü‡-5 2 Returns true if the event contains AIO readiness.Á Á-ú \É-Šã Ù-ú üá-L I Method is available on all platforms, but not all platforms support AIO.Á ².ú üº.<½Ø û.ú üƒ/'�Ù ü¯/'ÀÙ üÛ/' $ | [epoll] | *Not supported* |Á ü‡0+ ( | [kqueue]<sup>1</sup> | `EVFILT_AIO` |Á ·0ú ü¿0? < 1: Only supported on DragonFly BSD, FreeBSD, iOS and macOS.Á ƒ1ú ü‹1;�Û üË1?ÂË ü�2H‹Ì4ã2 ž ž ér o ê2 o
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w $ë2ä’5 ü®35 2 Returns true if the event contains LIO readiness.Á è3ú \ð3Šã €4ú üˆ4K H Method is available on all platforms, but only FreeBSD supports LIO. OnÁ üØ45 2 FreeBSD this method checks the `EVFILT_LIO` flag.Á4™5 Ÿ Ÿ ér o 5 o
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x $¡5ü6B”»6 ðÔ ér o Ù6 o
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y sys_eventÁLÎ6Ì°; üë8J G When the [alternate] flag is enabled this will print platform specificÁ ü¶9O L details, for example the fields of the `kevent` structure on platforms thatÁ ü†:K H use `kqueue(2)`. Note however that the output of this implementation isÁ üÒ:. + **not** consider a part of the stable API.Á �;ú ü…;* ' [alternate]: fmt::Formatter::alternateÁ ér{ Àc { üÐ;8 Ó; ¡ ¢ £ ¡ ér ¢ c c ˆ ¢cµ
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� 8$µA± »ATX 4\i†æý", â ‚ ƒ «Ï $ [ ‚ „× 3 ¤, ‚ …œ?T ,D. Œ„ ü9% " A collection of readiness events.Á _ú ücK H `Events` is passed as an argument to [`Poll::poll`] and will be used toÁ ü¯M J receive any new readiness events received since the last poll. Usually, aÁ üýJ G single `Events` instance is created at the same time as a [`Poll`] andÁ üÈ* ' reused on each call to [`Poll::poll`].Á óú ü÷3 0 See [`Poll`] for more documentation on polling.Á «ú ü¯3 0 [`Poll::poll`]: ../struct.Poll.html#method.pollÁ üã! [`Poll`]: ../struct.Poll.htmlÁ …ú t‰Çø ˜ú ,Â\¼Àù äƒÏù ü /õù äÐ use mio::{Events, Poll};Á äí¥Ÿ Šú üŽ1‡þ üÀ Ýý ,á #Á üç! # assert!(events.is_empty());Á ‰ú ü�- * // Register `event::Source`s with `poll`.Á »ú ü¿> ; poll.poll(&mut events, Some(Duration::from_millis(100)))?;Á þú ü‚ for event in events.iter() {Á ü£9 6 println!("Got an event for {:?}", event.token());Á ,Ýò„ „㎤ <ô€… <ü„× 4� ·t Øà¤ÍgK$è ‡”œ ,œ ‚ † † ªBªB ö B×®÷< ®B‘÷< 9)
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-ÜnLðÔÈu\‹ ·t‰Š‹Œ�Ž ü¢/ ü�E B Return a new `Events` capable of holding up to `capacity` events.Á çú tïÇø ‚ú <Š„× ¤– use mio::Events;Á ¯ú ü·- * let events = Events::with_capacity(1024);Á üé( % assert_eq!(1024, events.capacity());Á <–„×l© ¨r·t ˆ ˆ
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‰ Þ D·ü– ü³> ; Returns the number of `Event` values that `self` can hold.Á öú <þ„× ¤ŠíŠ £ú ü«-—‹ üÝ(΋ <Š„×D� ¨ ¨ ·t ¨r ˆ ¦ ˆ
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Š $§ôÐ üá8 5 Returns `true` if `self` contains no `Event` values.Á žú t¦Çø ¹ú <Á„× ¤ÍíŠ æú üî-—‹ ü è² <Ä„×D× © © ·t ˆ à ˆ
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‹ $áôù üš0 - Returns an iterator over the `Event` values.Á Ïú t×Çø êú ,˜\’Àù äáÏù ü‚/õù ä¶ê„ ä×¥Ÿ øú ü€1‡þ ü¶ Ýý Ûú üã$ ! // Register handles with `poll`.Á Œ ú ü” >͆ × ú üß ¡‡ ü„ 9ˇ , ò„ „Ì Ž¤ <á €… <í „× $€ ª ª ·t æ æ ·8 è· ‚ éÓ8 ‚ bëx&åúé ª ˆ … ˆ
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Œ $† ¼Å% üë : 7 Clearing all `Event` values from container explicitly.Á ª ú \² Šã  ú üÊ I F Events are cleared before every `poll`, so it is not required to callÁ ”˜ this manually.Á ¯ ú t· Çø Ê ú ,ø \ò Àù äÁ!Ïù üâ!/õù ä–"ê„ ä·"¥Ÿ Ø"ú üà"1‡þ ü–# Ýý »#ú üÃ#$¢’ ì#ú üô#>͆ ·$ú Ä¿$ // Clear all events.Á œÜ$ events.clear();Á üô$ è² „˜%Ž¤ <%€… <¹%„× ,Ì% « « ·t ˆ Ò% ˆ
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� $×%ü¯&0 ½& ¬ ¬ ·t ¬ ù‰ ˆ Á& ˆ
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Ž $Æ&üƒ'$ ð � � ±t‘’“ ÈL ÉL ÊL “ ˆ'L®'$³' � � ðér lÉ'DÎ' � � àsüè'$Lë' ±t±t ÉL � �
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“ ð$õ'ô¬( ð • • às–—˜™ úM ûM ÿM €N — ˜ ™ ±(LÑ($Ö( ” ” î›üí(($ð( àsۼݼ޼© ß¼ à¼ÛἈ cSñŸ«‡zÙàs úM ” õ( ”
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— ð$ú(üË*-LÎ* ® ® às ¨rÛ¼
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› $·,± ½,Td 4hi¢ì D À œ ž ±ÐD @ œ Ÿ ´ÿ6, É œ µÿ6 Ê œ µ¿²2 ¦ œ ¡,uwacNP<-#„Ÿ ü7= : An event source that may be registered with [`Registry`].Á uú üy? < Types that implement `event::Source` can be registered withÁ ü¹I F `Registry`. Users of Mio **should not** use the `event::Source` traitÁ üƒN K functions directly. Instead, the equivalent functions on `Registry` shouldÁ dÒ be used.Á ßú üã& # See [`Registry`] for more details.Á Šú üŽ) & [`Registry`]: ../struct.Registry.htmlÁ ¸ú ü¼" # Implementing `event::Source`Á ßú üãO L Event sources are always backed by system handles, such as sockets or otherÁ ü³J G system handles. These `event::Source`s will be monitored by the systemÁ üþL I selector. An implementation of `Source` will almost always delegate to aÁ üËO L lower level handle. Examples of this are [`TcpStream`]s, or the *unix only*Á Œ› [`SourceFd`].Á ú ü±/ , [`TcpStream`]: ../net/struct.TcpStream.htmlÁ üá. + [`SourceFd`]: ../unix/struct.SourceFd.htmlÁ �ú ü” # Dropping `event::Source`sÁ ´ú ü¸O L All `event::Source`s, unless otherwise specified, need to be [deregistered]Á üˆN K before being dropped for them to not leak resources. This goes against theÁ ü×O L normal drop behaviour of types in Rust which cleanup after themselves, e.g.Á ü§ K H a `File` will close itself. However since deregistering needs access toÁ üó 9 6 [`Registry`] this cannot be done while being dropped.Á
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ú ü±
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= : [deregistered]: ../struct.Registry.html#method.deregisterÁ ï
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Çø ‚ ú ü† : 7 Implementing `Source` on a struct containing a socket:Á Á ú ,� \û Àù üØ ) & use mio::{Interest, Registry, Token};Á Ü‚
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use mio::event::Source;Á äž
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äú »
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# #[allow(dead_code)]Á Ìî
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pub struct MySource {Á Ôˆ socket: TcpStream,Á ,£ò„ ©ú ô impl Source for MySource {Á üÌV S fn register(&mut self, registry: &Registry, token: Token, interests: Interest)Á ì£ -> io::Result<()>Á LÁ {Á üË7 4 // Delegate the `register` call to `socket`Á üƒ< 9 self.socket.register(registry, token, interests)Á LÀà„ Êú üÎX U fn reregister(&mut self, registry: &Registry, token: Token, interests: Interest)Á 짧³ LÅͳ üÏ9 6 // Delegate the `reregister` call to `socket`Á ü‰> ; self.socket.reregister(registry, token, interests)Á LÈà„ Òú üÖI F fn deregister(&mut self, registry: &Registry) -> io::Result<()> {Á ü 9 6 // Delegate the `deregister` call to `socket`Á üÚ, ) self.socket.deregister(registry)Á L‡à„ ,‘ò„ <—„× 4© ¢ ¢ Îì üŸ– ¢ ¨º ¨º £¤¥£¤¥ £ ¤ ¥ üŒˆ ü¶7 4 Register `self` with the given `Registry` instance.Á òú üúK H This function should not be called directly. Use [`Registry::register`]Á üÊK H instead. Implementors should handle registration by delegating the callÁ ìš to another `Source` type.Á ¼ú üÄC @ [`Registry::register`]: ../struct.Registry.html#method.registerÁD� ² ³ ² °º ³ „j �qœh€§ ¢ ¡ ¢
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£°º$¦ÁD´Ù,Ñä§LçüƒŠ üš: 7 Re-register `self` with the given `Registry` instance.Á Ùú üá4 1 This function should not be called directly. UseÁ üš@ = [`Registry::reregister`] instead. Implementors should handleÁ üßK H re-registration by either delegating the call to another `Source` type.Á ¯ú ü·G D [`Registry::reregister`]: ../struct.Registry.html#method.reregisterÁT† ´ µ ´ °º µ „j �qœh€§ ¢ š ¢
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¤°º$ŸÁDÙ,Êä§Làüó @ ü“ 9 6 Deregister `self` from the given `Registry` instance.Á Ñ ú üÙ 4Ó¾ ü’ @ = [`Registry::deregister`] instead. Implementors should handleÁ ü× C @ deregistration by delegating the call to another `Source` type.Á Ÿ ú ü§ G D [`Registry::deregister`]: ../struct.Registry.html#method.deregisterÁTö ¶ · ¶ °º · „j €§ ¢ � ¢
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¥°º$† ÁDŒ ü· 7 ¥ § § ÎìÂu ¼ ¢Âu 4Þ �u¨©ª £ ¤ ¥ ª ¨ © 79 üõ ‡Dø ¸ ¹ ¸ �u ¹ „j �qœh€§ ¦ Š ¦
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¨Âu$� Á<oÙEoä§NoüÀ!‰TÃ! º » º �u » „j �qœh€§ ¦ ×! ¦
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©Âu$Ü!ÁfpÙopä§xpü�#?T’# ¼ ½ ¼ �u ½ „j €§ ¦ �# ¦
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–”d˜ º”dŠ Ì� Unix only extensions.Á ú $± »Ûº”· Ô° ü§% $’ ¸Â) D ä ½ Õ µÂ)$D å ½ Õ µd¼ tÓ Unix pipe.Á ê ú üö/ , See the [`new`] function for documentation.Á $Ä æ Ê õ ºÛ6DÏ Å »¸64Ù Á ¼„· 79)+ ¤õ íD„¡ ô¸ # Mio's optional features.Á Û ú üã: 7 This document describes the available features in Mio.Á ¢ ú ÄÑ ôË ## `os-poll` (enabled)Á ¼ ú üÄJ G Mio by default provides only a shell implementation that `panic!`s theÁ ü“E B moment it is actually run. To run it requires OS support, this is
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\¾‰Œ·7 üÊ6 Sending end of an Unix pipe.Á ë6ú üï66 3 See [`new`] for documentation, including examples.Á »Ûºý'ú' ·4Â7 æl !¬ÀH
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È =a±=ae“ ü 8 5 Associates readiness events with [`event::Source`]s.Á 9ú ü=E B `Token` is a wrapper around `usize` and is used as an argument toÁ üƒ8 5 [`Registry::register`] and [`Registry::reregister`].Á ¼ú üÀ3ê‚ ôú üø0Âö ô©˜Ê üÈ@ = [`Registry::register`]: struct.Registry.html#method.registerÁ ü‰D A [`Registry::reregister`]: struct.Registry.html#method.reregisterÁ Îú lÒ
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# ExampleÁ àú üäM J Using `Token` to track which socket generated the event. In this example,Á ü²E B `HashMap` is used, but usually something like [`slab`] is better.Á øú üü+ ( [`slab`]: https://crates.io/crates/slabÁ ¨ú ,è\âÀù ä¿Ïù üÜ/õù üŒ2Îç ü¿3‹è üó- * use mio::{Events, Interest, Poll, Token};Á ô¡ use mio::net::TcpListener;Á Àú ¤ÄÊŸ ôÙ use std::io::{self, Read};Á üø" use std::collections::HashMap;Á › ú üŸ J G // After this number of sockets is accepted, the server will shutdown.Á üê " const MAX_SOCKETS: usize = 32;Á �
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N K // Pick a token that will not be used by any other socket and use that oneÁ Äà
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( % const LISTENER: Token = Token(1024);Á ¢ ú ü¦ ! // Used to store the sockets.Á üÈ % " let mut sockets = HashMap::new();Á î ú üò ; 8 // This is used to generate a unique token for a socketÁ ü® " let mut next_socket_index = 0;Á Ñ ú ÔÕ // The `Poll` instanceÁ üð Ýý ‘
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Ë„ ü�K H poll.registry().register(&mut listener, LISTENER, Interest::READABLE)?;Á Ùú üÝJ G // Spawn a thread that will connect a bunch of sockets then close themÁ ü¨& # let addr = listener.local_addr()?;Á ÜÏ�ë üë use std::net::TcpStream;Á Œú ü�N K // +1 here is to connect an extra socket to signal the socket to closeÁ üß% " for _ in 0..(MAX_SOCKETS+1) {Á ü…+ ( // Connect then drop the socketÁ ü±6 3 let _ = TcpStream::connect(addr).unwrap();Á Lèà„ <òàë úú ¤þ // Event storageÁ ü“1‡þ Åú üÉ7 4 // Read buffer, this will never actually get filledÁ Ü� let mut buf = [0; 256];Á �ú Ô¡ // The main event loopÁ T¼æ� ÔÇ // Wait for eventsÁ üâ&ú� ‰ú ô�µ‚ ü¬!Èú ìÎ LISTENER => {Á üìI F // Perform operations in a loop until `WouldBlock` isÁ ü¶# // encountered.Á ÔÚ loop {Á üõ1 . match listener.accept() {Á ü§4 1 Ok((mut socket, _)) => {Á üÜ6 3 // Shutdown the serverÁ ü“E B if next_socket_index == MAX_SOCKETS {Á üÙ2 / return Ok(());Á üŒ! }Á ®ú ü²? < // Get the token for the socketÁ üòE B let token = Token(next_socket_index);Á ü¸7 4 next_socket_index += 1;Á ðú üôB ? // Register the new socket w/ pollÁ ü·b _ poll.registry().register(&mut socket, token, Interest::READABLE)?;Á šú üž3 0 // Store the socketÁ üÒ> ; sockets.insert(token, socket);Á ì‘ }Á ü¯ T Q Err(ref e) if e.kind() == io::ErrorKind::WouldBlock => {Á ü„ N K // Socket is not ready anymore, stop acceptingÁ üÓ & # break;Á ìú öÚ ü˜ K H e => panic!("err={:?}", e), // Unexpected errorÁ Ìä }Á ¬þ µ� Œ” Ó� Ô¦ token => {Á üÁ / , // Always operate in a loopÁ Ôñ ªÓ üŒ O L match sockets.get_mut(&token).unwrap().read(&mut buf) {Á üÜ & # Ok(0) => {Á üƒ!K H // Socket is closed, remove it from the mapÁ üÏ!7 4 sockets.remove(&token);Á ü‡"&ÓÜ ì®"öÚ üÌ"H E // Data is not actually sent in this exampleÁ ü•#4 1 Ok(_) => unreachable!(),Á üÊ#T�Û üŸ$L I // Socket is not ready anymore, stop readingÁ üì$&ÓÜ ì“%öÚ ü±%K�Ý Ìý%äÝ ¬—&µ� Œ&Ó� l¿&Ê„ LÍ&à„ ,×&ò„ <Ý&€… <å&„× ,¼' �q _ÍŸà Ê Ë ¨r�q e“4 ¨r�q É É
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Ü©Ñ7hº7h7h7h „€ ü21 . Waker allows cross-thread waking of [`Poll`].Á dú ühI F When created it will cause events with [`readable`] readiness and theÁ ü²I F provided `token` if [`wake`] is called, possibly from another thread.Á üú ô€˜Ê üŸ>㘠üÞ+ ( [`wake`]: struct.Waker.html#method.wakeÁ Šú \ŽŠã šú üžN K `Waker` events are only guaranteed to be delivered while the `Waker` valueÁ lí
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is alive.Á ûú üÿN K Only a single `Waker` can be active per [`Poll`], if multiple threads needÁ üÎI F access to the `Waker` it can be shared via for example an `Arc`. WhatÁ ü˜G D happens if multiple `Waker`s are registered with the same `Poll` isÁ „à
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unspecified.Á ñú Ôõó¾ �ú ü”J G On platforms that support kqueue this will use the `EVFILT_USER` eventÁ üßN K filter, see [implementation notes of `Poll`] to see what platforms supportÁ ü®' $ kqueue. On Linux it uses [eventfd].Á Öú üÚK H [implementation notes of `Poll`]: struct.Poll.html#implementation-notesÁ ü¦C @ [eventfd]: https://man7.org/linux/man-pages/man2/eventfd.2.htmlÁ êú tîÇø ýú ü� 1 . Wake a [`Poll`] instance from another thread.Á ³ ú ,Ý \× Àù üž
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¥Ÿ ¼Œ use std::sync::Arc;Á ¤ ú ü¨ * ' use mio::{Events, Token, Poll, Waker};Á Ó ú ü× ( % const WAKE_TOKEN: Token = Token(10);Á € ú ü„ Ýý ü¥ . + let mut events = Events::with_capacity(2);Á Ô ú üØ C @ let waker = Arc::new(Waker::new(poll.registry(), WAKE_TOKEN)?);Á œ
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// thread we create below.Á ü‡ let waker1 = waker.clone();Á ü§( % let handle = thread::spawn(move || {Á üÐ+ ( // Working hard, or hardly working?Á üü2 / thread::sleep(Duration::from_millis(500));Á ¯ú ü³8 5 // Now we'll wake the queue on the other thread.Á üì/ , waker1.wake().expect("unable to wake");Á <œàë ¤ú ü¨F C // On our current thread we'll poll for events, without a timeout.Á üï"Åä ’ú ü–O L // After about 500 milliseconds we should be awoken by the other thread andÁ Ôæ // get a single event.Á ü� assert!(!events.is_empty());Á ü¢4 1 let waker_event = events.iter().next().unwrap();Á ü×' $ assert!(waker_event.is_readable());Á üÿ0 - assert_eq!(waker_event.token(), WAKE_TOKEN);Á ì° # handle.join().unwrap();Á „ÎŽ¤ <߀… <ç„× ,‹ µr =j%dL ߌ—,—_ Þ Þ ák¶h ¶h à µrá Àc á ¶h¶h Ì
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