2045 lines
889 KiB
Plaintext
2045 lines
889 KiB
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!<arch>
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/ 0 0 0 0 60114 `
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¦z_ZN100_$LT$core..net..ip_addr..Ipv6Addr$u20$as$u20$core..convert..From$LT$$u5b$u8$u3b$$u20$16$u5d$$GT$$GT$4from17h0b7082a0817163b8E _ZN100_$LT$mio..sys..unix..pipe..Sender$u20$as$u20$core..convert..From$LT$std..process..ChildStdin$GT$$GT$4from17h5ba8853d9184b076E _ZN76_$LT$mio..sys..unix..pipe..Sender$u20$as$u20$std..os..fd..raw..FromRawFd$GT$11from_raw_fd17hb8d0c3c6049b656aE _ZN101_$LT$std..os..fd..owned..OwnedFd$u20$as$u20$core..convert..From$LT$std..net..tcp..TcpListener$GT$$GT$4from17hc2bfde8bc5f79be4E _ZN103_$LT$mio..sys..unix..pipe..Receiver$u20$as$u20$core..convert..From$LT$std..process..ChildStderr$GT$$GT$4from17hdf8039c049b985d9E _ZN78_$LT$mio..sys..unix..pipe..Receiver$u20$as$u20$std..os..fd..raw..FromRawFd$GT$11from_raw_fd17h4f4e66c9482f6996E _ZN103_$LT$mio..sys..unix..pipe..Receiver$u20$as$u20$core..convert..From$LT$std..process..ChildStdout$GT$$GT$4from17hdd2a044ff3332045E _ZN103_$LT$mio..sys..unix..pipe..Sender$u20$as$u20$core..convert..From$LT$std..os..fd..owned..OwnedFd$GT$$GT$4from17h48567676550fd6d4E _ZN105_$LT$mio..sys..unix..pipe..Receiver$u20$as$u20$core..convert..From$LT$std..os..fd..owned..OwnedFd$GT$$GT$4from17h76c87efd8716df9eE _ZN108_$LT$mio..net..uds..stream..UnixStream$u20$as$u20$core..convert..From$LT$std..os..fd..owned..OwnedFd$GT$$GT$4from17hc2e7adea6ff92a7bE _ZN3mio3net3uds6stream10UnixStream8from_std17h48603dd23d316768E _ZN116_$LT$$LT$mio..event..event..Event$u20$as$u20$core..fmt..Debug$GT$..fmt..EventDetails$u20$as$u20$core..fmt..Debug$GT$3fmt17hf8185068761873e8E _ZN117_$LT$std..os..unix..net..datagram..UnixDatagram$u20$as$u20$core..convert..From$LT$std..os..fd..owned..OwnedFd$GT$$GT$4from17h00437dda09b04c08E _ZN153_$LT$core..result..Result$LT$T$C$F$GT$$u20$as$u20$core..ops..try_trait..FromResidual$LT$core..result..Result$LT$core..convert..Infallible$C$E$GT$$GT$$GT$13from_residual17h1ea11deb2c028cdaE _ZN153_$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$$GT$13from_residual17h275cefe90f53d723E _ZN153_$LT$core..result..Result$LT$T$C$F$GT$$u20$as$u20$core..ops..try_trait..FromResidual$LT$core..result..Result$LT$core..convert..Infallible$C$E$GT$$GT$$GT$13from_residual17h2e6331421f6d9e96E _ZN153_$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$$GT$13from_residual17h346c933002768f0fE _ZN153_$LT$core..result..Result$LT$T$C$F$GT$$u20$as$u20$core..ops..try_trait..FromResidual$LT$core..result..Result$LT$core..convert..Infallible$C$E$GT$$GT$$GT$13from_residual17h45624a2a2d505a46E _ZN153_$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$$GT$13from_residual17h5e1a1e10b11ae9d7E _ZN153_$LT$core..result..Result$LT$T$C$F$GT$$u20$as$u20$core..ops..try_trait..FromResidual$LT$core..result..Result$LT$core..convert..Infallible$C$E$GT$$GT$$GT$13from_residual17h9efed7c40a05c57bE _ZN153_$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$$GT$13from_residual17haa5014dd2b842df1E _ZN153_$LT$core..result..Result$LT$T$C$F$GT$$u20$as$u20$core..ops..try_trait..FromResidual$LT$core..result..Result$LT$core..convert..Infallible$C$E$GT$$GT$$GT$13from_residual17hb70cb756c6cd0f81E _ZN153_$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$$GT$13from_residual17hb769a601c45b5e83E _ZN153_$LT$core..result..Result$LT$T$C$F$GT$$u20$as$u20$core..ops..try_trait..FromResidual$LT$core..result..Result$LT$core..convert..Infallible$C$E$GT$$GT$$GT$13from_residual17hbaf8e16b3634d230E _ZN153_$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$$GT$13from_residual17hc5a977167f766ca4E _ZN153_$LT$core..result..Result$LT$T$C$F$GT$$u20$as$u20$core..ops..try_trait..From
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mio-89d8d8484133e332.mio.199e90e4c272b0c1-cgu.0.rcgu.o/
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mio-89d8d8484133e332.mio.199e90e4c272b0c1-cgu.1.rcgu.o/
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lib.rmeta/ 0 0 0 644 418104 `
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ELF · ¸_ @ @ GNU À rust
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] #rustc 1.96.0 (ac68faa20 2026-05-25)ÁÀ뉊 ]!ÜÛê(¹Þ—šên -5be7b69c3ff7b5b8Á íàÄTËŸ ÜJîÄ)'ß\¥! -3d1337db07d0b3aeÁ ¤²XctÔ'ÐÓ©z¨É½Ó -a4945860e1c53b00Á ¤°ð ¾ä-±($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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d� D“ º» NonZeroU8ÁL ¤” × # ¤,
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(  œ7 )+ ”ÝDã ”úD€ lÌ Ò lä ê ”üD‚ l› €g !" äñ ü¯= : Returns a `Interest` set representing readable interests.ÁDû €gä� üÎ= : Returns a `Interest` set representing writable interests.ÁDš €gä¸ ü¯H E Returns a `Interest` set representing priority completion interests.Á ú linuxÁœ†ú ¬›ü…,üü7D €gü¨3 ü• Add together two `Interest`.Á ºú üÂD A This does the same thing as the `BitOr` implementation, but is aÁ ´‹ constant function.Á ¦ú <® ```Á ´º use mio::Interest;Á Õú üÝK H const INTERESTS: Interest = Interest::READABLE.add(Interest::WRITABLE);Á ü2 / # fn silent_dead_code_warning(_: Interest) { }Á üä) & # silent_dead_code_warning(INTERESTS)Á <’”Ç .üËX Hthis returns the result of the operation, without modifying the originalÁ µ €g€g€g �¡†J¹
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�Jü± 8 ü½+ ( Removes `other` `Interest` from `self`.Á íú üõD A Returns `None` if the set would be empty after removing `other`.Á ¾ú <Æ”Ç ´Ò¤Ç íú üõN K const RW_INTERESTS: Interest = Interest::READABLE.add(Interest::WRITABLE);Á Èú üÐ= : // As long a one interest remain this will return `Some`.Á ü’F C let w_interest = RW_INTERESTS.remove(Interest::READABLE).unwrap();Á üÝ' $ assert!(!w_interest.is_readable());Á ü‰& # assert!(w_interest.is_writable());Á ´ú ü¼> ; // Removing all interests from the set will return `None`.Á üÿ< 9 assert_eq!(w_interest.remove(Interest::WRITABLE), None);Á Àú üÈ> ; // Its also possible to remove multiple interests at once.Á ü‹8 5 assert_eq!(RW_INTERESTS.remove(RW_INTERESTS), None);Á <È”Ç .üÔXŸÉ4¸ €g€gۼݼ޼© ß¼ à¼ÛἈ cSñŸ«‡zÙ€g
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,Å üŠ & ü» : 7 Returns true if the value includes readable readiness.Á .\ú \— €g
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²Kü´ & üå : 7 Returns true if the value includes writable readiness.Á .\¤ \Á €g
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µLüÚ ! ü� 6 3 Returns true if `Interest` contains AIO readiness.Á .\Ê 4ç €g
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¸Müö!! ü«!6 3 Returns true if `Interest` contains LIO readiness.Á .\æ! 4ƒ" €g
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! »Nü—#& üÇ"; 8 Returns true if `Interest` contains priority readiness.Á .\‡# \¤# €g
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" ¾Oäð# €g$% ˜ú ™ú % \“$4˜$ # # €güº$#,½$ €g€g€g # #
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`Pü�%" €g' —˜ ' ü¸%'d»% à à€g€g & È% &
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úüë휻 Ø Ô Ê̺¼,é ¯±¡£“•|~ik|�Z ü˜8 5 Polls for readiness events on all registered values.Á Ñ ú 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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K H supplying readiness interest. The readiness interest tells `Poll` whichÁ üÿ
|
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L I specific operations on the handle to monitor for readiness. A `Token` isÁ üÌ M J also passed to the [`register`] function. When `Poll` returns a readinessÁ üš J G event, it will include this token. This associates the event with theÁ üå * ' event source that generated the event.Á �
|
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ú ü”
|
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0 - [`event::Source`]: ./event/trait.Source.htmlÁ üÅ
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5 2 [`read`]: ./net/struct.TcpStream.html#method.readÁ üû
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7 4 [`write`]: ./net/struct.TcpStream.html#method.writeÁ ü³6 3 [`register`]: struct.Registry.html#method.registerÁ ê ú tî # ExamplesÁ ý ú 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 î ú 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 ª ú 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 Ï ú 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 Ù ú 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 ”Ç ö ú Œú # PortabilityÁ Œ ú ü�L I Using `Poll` provides a portable interface across supported platforms asÁ üÝ> ; long as the caller takes the following into consideration:Á œ ú 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 ,–/ \�/ òè äí/ �é œŠ0 # use std::net;Á üž0/ §é üÎ0% " use mio::{Poll, Interest, Token};Á äô0 –ê ì‘1 use std::net::SocketAddr;Á ä¯1 use std::time::Duration;Á ¤Ì1 use std::thread;Á á1 ú 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 �3 ú ü”3* ' thread::sleep(Duration::from_secs(1));Á ¿3 ú äÃ3 let poll = Poll::new()?;Á à3 ú 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 ²ô <»5 ”Ç Ã5 ú ¼Ç5 ### Dropping `Poll`Á ß5 ú 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 Î8 ú üÒ8. + [event sources]: ./event/trait.Source.htmlÁ �9 ú ü…9& # ### Accessing raw fd/socket/handleÁ ¬9 ú 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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D $š• × • l‚– èhFHJLN 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 Ș ú 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 ¼š ú 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 �ž ú 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 ËŸ ú 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¡ äÐ 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 ঠú üè¦0 ôå 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÷¨ ùç Š© ú ,Ω \È© òè äª �é œÎª Ë� üæª/ §é üš«- àé äÌ« –ê ìí« ±Ž ü�¬' $ use std::time::{Duration, Instant};Á »¬ ú üì �í è¬ ú üð¬5 ¦� üª4 å� üãA > let mut socket = TcpStream::connect(listener.local_addr()?)?;Á ©® ú ü±®& # // Register the socket with `poll`Á ìÜ® öÚ ¤þ® &mut socket,Á Œ—¯ »Û ü¯2 ×Û ä¯ ú üì¯1 ¹í ü¢° let start = Instant::now();Á üÆ°- * let timeout = Duration::from_millis(500);Á ø° ú T€± ˜ñ ü�±& # let elapsed = start.elapsed();Á º± ú ü± if elapsed >= timeout {Á üæ±# // Connection timed outÁ ÔŽ² return Ok(());Á L² ’ô »² ú üò* ' let remaining = timeout - elapsed;Á üò²1 . poll.poll(&mut events, Some(remaining))?;Á ¨³ ú ô°³ çñ üÓ³* ' if event.token() == Token(0) {Á ü‚´? < // Something (probably) happened on the socket.Á ôÆ´ Õó lé´ üó Lû´ ’ô ,‰µ ¤ô <“µ ²ô <Ÿµ ”Ç D²µ ë ì ëèh 앤Ýo€gñ¤ E ¤ G G ¾µ E Î앤 »µ œ•¤ lŸ¶
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the poll.Á ºÑ ú üÂÑL ܉ ü“Ò5 ³Š ÍÒ ú 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 ŸÔ ú t§Ô ùç ºÔ ú ,þÔ \øÔ òè äÝÕ �é œþÕ Ë� ü–Ö/ §é üÊÖ- àé äüÖ –ê ì�× ±Ž ä¿× ׎ à× ú üè× �í �Ø ú ü•Ø5 ¦� üÏØ4 å� üˆÙA áû ÎÙ ú üÖÙ& ºü ì�Ú öÚ ¤£Ú øü Œ¼Ú »Û ìÒÚ �� ôÚ ú üüÚ- * poll.registry().deregister(&mut socket)?;Á ®Û ú ü¶Û1 ¹í ìÛ ú 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 „£Ý À“ <¸Ý ²ô <ÄÝ ”Ç T×Ý ï ð ïèh ð•¤ñ¤ E ¤ K K åÝ E ß„ âÝ ñ„l£Þ
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J•¤$æÝ › pT%' üçà/ ü¦ß1 . Creates a new independently owned `Registry`.Á Üß ú üäßI F Event sources registered with this `Registry` will be registered withÁ ü²à0 - the original `Registry` and `Poll` instance.ÁLîà ñ ñèh Ö¿Ù¿ Ú¿« Û¿ˆ Ü¿ Ý¿Þ¿ˆ ‚†f|Â
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T $çð <§ « ; $à ¬ Ï£*D� Ø Ï «£* Ù Ï «£, × ò ÏÞ- ó ‰ Ï·. Ò — Ïð#,™ ñ Ï ƒ¾ 4Ì ò Ï ƒÄ,ê ó Ï ƒ�*,Ì6 Ô Ï ƒ ‚ê'DÍ ³ Ï ƒ˜)lª7 È Ï ƒ Ó˜) É Ï ƒ ÓL° ,´ ½¾ÔÏ' öpX ë X äð'$ó' Ýoöp W W
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X ¹ ø'L÷ ú‡â¬É úÊ”à üÈ +üÄ 0ü» ; ,û Òé U Y [�D < Y \ ®à7, ½ Y ] ¯à7 ¾ Y ] ¯Ç¯- ¦ Y ^,fhY[HJ<(!T ƒq`b üÜB ̾ Create a new `Waker`.Á ã ø øèh ÝoÖ¿Ù¿ Ú¿« Û¿ˆ Ü¿ Ý¿Þ¿ˆ ‚†f|Â
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` €Dçó,ü<� ` Å¥ a Ý¥ a ú¥ a a ` a ¯jƒq ü§$ üÁ6 3 Wake up the [`Poll`] associated with this `Waker`.Á üú ô„ [`Poll`]: struct.Poll.htmlÁ$® ù ùƒq ñ¤ _ ³ _
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b $´lƒ ü ( % Readiness event types and utilities.Á ,‹ d|–ð#,† Ö ¥¾ 4¤ € §—9$¬ Ú ¨Ü4É œ ©LM ,QcÖé U d fà7, ½ d g ¯à7 ¾ d g ¯× # ¤, d h,PRCED T¹ ·qjklmnopqrs äí ôÊ Returns the event's token.Á,ô ú ú·q Ýo i ú i
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j $ûüÿ! ü¾: 7 Returns true if the event contains readable readiness.Á ýú \…äÐ •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\† û û·q i ’ i
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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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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?ôº üÃH½»D— ý ý·q i i
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m $¡üº $ üæ= : Returns true if the event contains read closed readiness.Á ¨ú \°äÐ 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±<ýÄ òú üú'ÏÅ ü¦'€Æ üÒ' $ | [epoll] | `EPOLLHUP`, or |Á üþ2 / | | `EPOLLIN` and `EPOLLRDHUP` |Á üµ' $ | [kqueue] | `EV_EOF` |Á áú üé;ÁÇ ü©?ôº üíH½»tÁ þ þ·q i Ð i
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n $Ñ ü˜&% üœ > ; Returns true if the event contains write closed readiness.Á ß ú \ç äÐ ÷ ú üÿ E B On [epoll] this is essentially a check for `EPOLLHUP` flag as theÁ üÉ J G local stream shutting down its write half does not trigger this event.Á ˜ ú ü D A On [kqueue] the local stream shutting down the write half of itsÁ üé # socket will trigger this event.Á ‘ ú ü™ H¥Í üæ E B return readiness when write half is closed, it is guaranteed thatÁ ü°!#ÅÎ Ø!ú üà!<ýÄ ¡"ú ü©"'ÏÅ üÕ"'€Æ ü�#'´Ï ü#+ ( | | only `EPOLLERR`, or |Á üÝ#1 . | | `EPOLLOUT` and `EPOLLERR` |Á ü“$'¡Ð ¿$ú üÇ$;ÁÇ ü‡%?ôº üË%H½»|Ÿ& ÿ ÿ·q i ¯& i
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o $°&ü«,! üü&: 7 Returns true if the event contains priority readiness.Á »'ú \Ã'äÐ Ó'ú üÛ'KƒÄ œ«( priority event.Á Ã(ú üË(<ýÄ Œ)ú ü”)'ÏÅ üÀ)'€Æ üì)' $ | [epoll] | `EPOLLPRI` |Á ü˜*' $ | [kqueue] | *Not supported* |Á Ä*ú üÌ*;ÁÇ üŒ+?ôº üÐ+H½»\², € € ·q i ¾, i
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p $¿,äÜ2 ü‡-5 2 Returns true if the event contains AIO readiness.Á Á-ú \É-äÐ Ù-ú üá-L I Method is available on all platforms, but not all platforms support AIO.Á ².ú üº.<ýÄ û.ú üƒ/'ÏÅ ü¯/'€Æ 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;ÁÇ üË1?ôº ü�2H½»4ã2 � � ·q i ê2 i
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q $ë2ä’5 ü®35 2 Returns true if the event contains LIO readiness.Á è3ú \ð3äÐ €4ú üˆ4K H Method is available on all platforms, but only FreeBSD supports LIO. OnÁ üØ45 2 FreeBSD this method checks the `EVFILT_LIO` flag.Á4™5 ‚ ‚ ·q i 5 i
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s sys_eventÁLÎ6Ì°; üë8J G When the [alternate] flag is enabled this will print platform specificÁ ü¶9O L details, for example the fields of the `kevent` structure on platforms thatÁ ü†:K H use `kqueue(2)`. Note however that the output of this implementation isÁ üÒ:. + **not** consider a part of the stable API.Á �;ú ü…;* ' [alternate]: fmt::Formatter::alternateÁ ·qu Àc u üÐ;8 Ó; „ … † „ ·q … c c ˆ ¢cµ
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{ 8$µA± »ATX 4\c€Úð#, Ö | } ¥é $ U | ~× 3 ¤, | œ9T (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‰ùç ˜ú ,Â\¼òè äƒ�é ü /§é äÐ use mio::{Events, Poll};Á äí׎ Šú üŽ1¹í üÀ �í ,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 ,ݤô „ãÀ“ <ô²ô <ü”Ç 4� ƒs Ÿ_×›O® �”œ ,œ | € € ªBªB ö B†¬÷< ®B‘÷< 9)
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-ÜnLèÑ“t\‹ ƒsƒ„…†‡ˆ ü¢/ ü�E B Return a new `Events` capable of holding up to `capacity` events.Á çú tïùç ‚ú <Š”Ç ¤– use mio::Events;Á ¯ú ü·- * let events = Events::with_capacity(1024);Á üé( % assert_eq!(1024, events.capacity());Á <–”Çl© öpƒs ‚ ‚
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ƒ ò D·ü– ü³> ; Returns the number of `Event` values that `self` can hold.Á öú <þ”Ç ¤Š¡÷ £ú ü«-Ë÷ üÝ(‚ø <Š”ÇD� ‹ ‹ ƒs öp ‚ ¦ ‚
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„ $§ôÐ üá8 5 Returns `true` if `self` contains no `Event` values.Á žú t¦ùç ¹ú <Á”Ç ¤Í¡÷ æú üî-Ë÷ ü Æ <Ä”ÇD× Œ Œ ƒs ‚ à ‚
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… $áôù üš0 - Returns an iterator over the `Event` values.Á Ïú t×ùç êú ,˜\’òè äá�é ü‚/§é 䶟ñ ä×׎ øú ü€1¹í ü¶ �í Ûú üã$ ! // Register handles with `poll`.Á Œ ú ü” >‚ó × ú üß Öó ü„ 9€ô , ¤ô „Ì À“ <á ²ô <í ”Ç $€ � � ƒs Ú Ú —9 ÜÌ | ݳ9 | V5ÆÀL“]à � ‚ … ‚
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† $† ¼Å% üë : 7 Clearing all `Event` values from container explicitly.Á ª ú \² äÐ Â ú üÊ I F Events are cleared before every `poll`, so it is not required to callÁ ”˜ this manually.Á ¯ ú t· ùç Ê ú ,ø \ò òè äÁ!�é üâ!/§é ä–"Ÿñ ä·"׎ Ø"ú üà"1¹í ü–# �í »#ú üÃ#$Öþ ì#ú üô#>‚ó ·$ú Ä¿$ // Clear all events.Á œÜ$ events.clear();Á üô$ Æ „˜%À“ <%²ô <¹%”Ç ,Ì% Ž Ž ƒs ‚ Ò% ‚
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• $·,± ½,Td 4hcœý D º – ˜ «�D < – ™ ®à7, ½ – š ¯à7 ¾ – š ¯Ç¯2 ¦ – ›,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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pub struct MySource {Á Ôˆ socket: TcpStream,Á ,£¤ô ©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 LÀ’ô Êú üÎX U fn reregister(&mut self, registry: &Registry, token: Token, interests: Interest)Á ì§ÙŸ LÅÿŸ üÏ9 6 // Delegate the `reregister` call to `socket`Á ü‰> ; self.socket.reregister(registry, token, interests)Á LÈ’ô 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‡’ô ,‘¤ô <—”Ç 4© œ œ Îì üŸ– œ Ú¦ Ú¦ �žŸ�žŸ Ÿ � ž 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� • – • ⦠– èh Ýo€gñ¤ œ ¡ œ
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�â¦$¦€D´ó,ÑÕ¥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† — ˜ — ⦠˜ èh Ýo€gñ¤ œ š œ
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žâ¦$Ÿ€Dó,ÊÕ¥Làüó @ ü“ 9 6 Deregister `self` from the given `Registry` instance.Á Ñ ú üÙ 4…« 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 ™ š ™ ⦠š èh ñ¤ œ � œ
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Fü£j üï\ Return a new `Poll` handle.Á —] ú ü£]G D This function will make a syscall to the operating system to createÁ üó]G D the system selector. If this syscall fails, `Poll::new` will returnÁ œÃ^ with the error.Á ß^ ú üë^U R close-on-exec flag is set on the file descriptors used by the selector to preventÁ üÉ_F C leaking it to executed processes. However, on some systems such asÁ ü˜`K H old Linux systems that don't support `epoll_create1` syscall it is doneÁ üì`F C non-atomically, so a separate thread executing in parallel to thisÁ ü»aG D function may accidentally leak the file descriptor if it executes aÁ ü‹b- * new process before this function returns.Á Áb ú üÍb- * See [struct] level docs for more details.Á ƒc ú ô�c óÏ ¶c ú tÂc ùç Ùc ú <åc ”Ç äõc �é üšd/ §é äÒd use mio::{Poll, Events};Á ä÷d ׎ œe ú ü¨e& # let mut poll = match Poll::new() {Á Ì×e Ok(poll) => poll,Á üùeH E Err(e) => panic!("failed to create Poll instance; err={:?}", e),Á 4Êf };Á Ùf ú üåf2 / // Create a structure to receive polled eventsÁ ü g1 ¹í Úg ú üæg< 9 // Wait for events, but none will be received because noÁ ü«hG D // `event::Source`s have been registered with this `Poll` instance.Á üûh> ; poll.poll(&mut events, Some(Duration::from_millis(500)))?;Á üÂi Æ „êi À“ <ƒj ²ô <“j ”Ç »Ç ˜ ˆ
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× ëW±ëW%‹ üºH E Adapter for [`RawFd`] providing an [`event::Source`] implementation.Á ƒú ü‡E B `SourceFd` enables registering any type with an FD with [`Poll`].Á Íú üÑI F While only implementations for TCP and UDP are provided, Mio supportsÁ ü›N K registering any FD that can be registered with the underlying OS selector.Á üê- * `SourceFd` provides the necessary bridge.Á ˜ú üœL I Note that `SourceFd` takes a `&RawFd`. This is because `SourceFd` **doesÁ üéH E not** take ownership of the FD. Specifically, it will not manage anyÁ ü²P M lifecycle related operations, such as closing the FD on drop. It is expectedÁ üƒ= : that the `SourceFd` is constructed right before a call toÁ üÁ= : [`Registry::register`]. See the examples for more detail.Á ÿú üƒ1 . [`event::Source`]: ../event/trait.Source.htmlÁ üµ!¥ð ü×Cߨ › ú tŸ ùç ® ú „²
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òè ä– �é ü³ /§é üã % " use mio::{Interest, Poll, Token};Á „‰
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#[cfg(unix)]Á äš use mio::unix::SourceFd;Á ô· #[cfg(target_os = "wasi")]Á äÖ use mio::wasi::SourceFd;Á ó ú ì÷ use std::os::fd::AsRawFd;Á ô•
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5 2 let listener = TcpListener::bind("127.0.0.1:0")?;Á ‰ú ä�·‘ ªú ä® // Register the listenerÁ ìËöÚ üé- * &mut SourceFd(&listener.as_raw_fd()),Á Œ—»Û ì©�� „ÇÀ“ <زô <à”Ç èú üìK H Implementing [`event::Source`] for a custom type backed by a [`RawFd`].Á ¸ú ,û\õòè üÕ0 - use mio::{event, Interest, Registry, Token};Á „†àë ä—ùë ô´žì äÓÅì ðú Üô use std::os::fd::RawFd;Á „�� ¡ú Ì¥Ò� ¬¿ pub struct MyIo {Á ”Õ fd: RawFd,Á ,è¤ô îú üò! impl event::Source for MyIo {Á ü”Vúž ìëÙŸ L‰ÿŸ ü“C @ SourceFd(&self.fd).register(registry, token, interests)Á L×’ô áú üåX²¡ ì¾ÙŸ LÜÿŸ üæE B SourceFd(&self.fd).reregister(registry, token, interests)Á L¬’ô ¶ú üºIÒ£ ü„3 0 SourceFd(&self.fd).deregister(registry)Á L¸’ô ,¤ô <È”Ç 9Dì Š Ú Ú îj œ`º_ßq Ù Û Š îj %‹J �øîj Ø Ø
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Ï�t flagsÁ,Ê(* Ã Ï Ï öplŸÙ.<²Ä.Ç.«.®.›.ž.‹.Ž.\ã€.ƒ.q.t.b.e.S.V.D.G.5.8.d°*.-.. . ..Ôë.,‹ó-ö-å-è-Ò-Õ-À-Ã-üÍ4. ü·( % Create a new non-blocking Unix pipe.Á àú üäN K This is a wrapper around Unix's [`pipe(2)`] system call and can be used asÁ ü³2 / inter-process or thread communication channel.Á æú üêP M This channel may be created before forking the process and then one end usedÁ ü»P M in each process, e.g. the parent process has the sending end to send commandÁ ÌŒ to the child process.Á ¦ú üªU R [`pipe(2)`]: https://pubs.opengroup.org/onlinepubs/9699919799/functions/pipe.htmlÁ €ú d„ # EventsÁ ‘ú ü•J G The [`Sender`] can be registered with [`WRITABLE`] interest to receiveÁ üàP M [writable events], the [`Receiver`] with [`READABLE`] interest. Once data isÁ ü±L I written to the `Sender` the `Receiver` will receive an [readable event].Á þú ü‚P M In addition to those events, events will also be generated if the other sideÁ üÓH E is dropped. To check if the `Sender` is dropped you'll need to checkÁ üœK H [`is_read_closed`] on events for the `Receiver`, if it returns true theÁ üèM J `Sender` is dropped. On the `Sender` end check [`is_write_closed`], if itÁ ü¶O L returns true the `Receiver` was dropped. Also see the second example below.Á †ú üŠ$ ! [`WRITABLE`]: Interest::WRITABLEÁ ü¯0 - [writable events]: event::Event::is_writableÁ üà$ ! [`READABLE`]: Interest::READABLEÁ ü…/ , [readable event]: event::Event::is_readableÁ üµ4 1 [`is_read_closed`]: event::Event::is_read_closedÁ üê6 3 [`is_write_closed`]: event::Event::is_write_closedÁ ¡ú œ¥ # DeregisteringÁ ¹ú ü½I F Both `Sender` and `Receiver` will deregister themselves when dropped,Á ü‡ E B **iff** the file descriptors are not duplicated (via [`dup(2)`]).Á Í ú üÑ S P [`dup(2)`]: https://pubs.opengroup.org/onlinepubs/9699919799/functions/dup.htmlÁ ¥ ú t© ùç ¸ ú ü¼ M J Simple example that writes data into the sending end and read it from theÁ ”Š receiving end.Á � ú <¡ ”Ç ü© % " use std::io::{self, Read, Write};Á Ï ú üÓ - * use mio::{Poll, Events, Interest, Token};Á Ä� use mio::unix::pipe;Á š ú üž 5 2 // Unique tokens for the two ends of the channel.Á üÔ & # const PIPE_RECV: Token = Token(0);Á üû & # const PIPE_SEND: Token = Token(1);Á ¢ ú ü¦ #Óà üÊ = : // Create our `Poll` instance and the `Events` container.Á üˆ! �í ü©!. + let mut events = Events::with_capacity(8);Á Ø!ú ÌÜ! // Create a new pipe.Á üö!2 / let (mut sender, mut receiver) = pipe::new()?;Á ©"ú ü") & // Register both ends of the channel.Á ü×"L I poll.registry().register(&mut receiver, PIPE_RECV, Interest::READABLE)?;Á ü¤#J G poll.registry().register(&mut sender, PIPE_SEND, Interest::WRITABLE)?;Á ï#ú üó#* ' const MSG: &[u8; 11] = b"Hello world";Á ž$ú T¢$˜ñ ü$&¬ñ Ô$ú üØ$$¸å üý$!úæ üŸ%. + PIPE_SEND => sender.write(MSG)Á üÎ%5 2 .and_then(|n| if n != MSG.len() {Á ü„&L I // We'll consider a short write an error in thisÁ üÑ&K H // example. NOTE: we can't use `write_all` withÁ ü�'0 - // non-blocking I/O.Á üÎ'@ = E
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\Ô8üÜJa üÃ9J G Execute an I/O operation ensuring that the socket receives more eventsÁ ü’:& # if it hits a [`WouldBlock`] error.Á ½:ú \Å:äÐ Õ:ú üÝ:F C This method is required to be called for **all** I/O operations toÁ ü¨;L I ensure the user will receive events once the socket is ready again afterÁ üù;% " returning a [`WouldBlock`] error.Á £<ú ü«<- * [`WouldBlock`]: io::ErrorKind::WouldBlockÁ Ý<ú tå<ùç ø<ú <€=”Ç äŒ=�é ,=ùñ ü·=/§é „ë=� ì€>öì Ä¢>µº ¿>ú üÇ>* ' let (sender, receiver) = pipe::new()?;Á ö>ú üþ>+ ( // Wait until the sender is writable...Á ®?ú ü¶?B ? // Write to the sender using a direct libc call, of course theÁ üý?9 6 // `io::Write` implementation would be easier to use.Á ¼»@ let buf = b"hello";Á ô×@ let n = sender.try_io(|| {Á üú@3 0 let buf_ptr = &buf as *const _ as *const _;Á ü²AQ N let res = unsafe { libc::write(sender.as_raw_fd(), buf_ptr, buf.len()) };Á ´ˆB if res != -1 {Á ä£B Ok(res as usize)Á „ÄB
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¼ ³_±³_u‹ 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 üÀ3Ÿï ôú üø0ôå ô©Ù¶ 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\âòè ä¿�é üÜ/§é üŒ2¨Õ ü¿3åÕ üó- * use mio::{Events, Interest, Poll, Token};Á ô¡ use mio::net::TcpListener;Á Àú ¤ÄüŽ 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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Öî 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 ÜÏêØ 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 Lè’ô <òºÙ úú ¤þ // Event storageÁ ü“1¹í Åú üÉ7 4 // Read buffer, this will never actually get filledÁ Ü� let mut buf = [0; 256];Á �ú Ô¡ // The main event loopÁ T¼˜ñ ÔÇ // Wait for eventsÁ üâ&¬ñ ‰ú ô�çñ ü¬!úæ 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 ýÄ ü˜ K H e => panic!("err={:?}", e), // Unexpected errorÁ Ìä }Á ¬þ çí Œ” …î Ô¦ token => {Á üÁ / , // Always operate in a loopÁ Ôñ ±½ 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‡"&ÚÆ ì®"ýÄ üÌ"H E // Data is not actually sent in this exampleÁ ü•#4 1 Ok(_) => unreachable!(),Á üÊ#T¤Å üŸ$L I // Socket is not ready anymore, stop readingÁ üì$&ÚÆ ì“%ýÄ ü±%K—Ç Ìý%ëÇ ¬—&çí Œ&…î l¿&üó LÍ&’ô ,×&¤ô <Ý&²ô <å&”Ç ,¼' Ýo M&ú=d"ëB ¾ ¿ öpÝo u‹4 öpÝo ½ ½
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Сίfº¯f¯f¯f „€ 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€Ù¶ üŸ>•ˆ üÞ+ ( [`wake`]: struct.Waker.html#method.wakeÁ Šú \ŽäÐ 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 Ôõ¥® �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 tîùç ýú ü� 1 . Wake a [`Poll`] instance from another thread.Á ³ ú ,Ý \× òè üž
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; 8 # fn main() -> Result<(), Box<dyn std::error::Error>> {Á ¤Ú
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׎ 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„ �í 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 <œºÙ ¤ú ü¨F C // On our current thread we'll poll for events, without a timeout.Á üï"ÌÎ ’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 „ÎÀ“ <ß²ô <ç”Ç ,‹ ƒq ?y[Ò NÐ ÓŒ—,—Y Ò Ò ¯j.g .g À ƒqÕ Àc Õ .g.g ®
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Õ .g±.g„Œ ´) A readiness event.Á @ú üDK H `Event` is a readiness state paired with a [`Token`]. It is returned byÁ œ� [`Poll::poll`].Á ¤ú ü¨? < For more documentation on polling and events, see [`Poll`].Á èú üì3èï ü !¥ð üÂ# [`Token`]: ../struct.Token.htmlÁ ,— ·q Q
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