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76 KiB
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167 lines
76 KiB
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!<arch>
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/ 0 0 0 0 1050 `
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=ð =ð =ð =ð =ð =ð =ð =ð =ð =ð =ð =ð =ð =ð_ZN12atomic_waker11AtomicWaker3new17hfb81f4c6370949f9E _ZN12atomic_waker11AtomicWaker4take17h598d0975ba120724E _ZN4core6option15Option$LT$T$GT$4take17h800b77070637d1d4E _ZN4core3ptr72drop_in_place$LT$core..option..Option$LT$core..task..wake..Waker$GT$$GT$17h1e4a9838a44f2ef6E _ZN12atomic_waker11AtomicWaker4wake17h98e4c25b2a937f44E _ZN12atomic_waker11AtomicWaker8register17hcd89cee28fa28e81E _ZN4core6result19Result$LT$T$C$E$GT$14unwrap_or_else17h555ccf19fbeb6c07E _ZN4core3ptr44drop_in_place$LT$core..task..wake..Waker$GT$17hbe9c5c609a7498a3E _ZN4core10intrinsics23is_val_statically_known17h53b022fedab08091E _ZN4core3ptr9const_ptr33_$LT$impl$u20$$BP$const$u20$T$GT$13is_aligned_to17h933468602e757dd4E _ZN4core4sync6atomic23atomic_compare_exchange17h1f522a372f10ac62E _ZN62_$LT$atomic_waker..AtomicWaker$u20$as$u20$core..fmt..Debug$GT$3fmt17hdf145f410ec2d52bE _ZN68_$LT$atomic_waker..AtomicWaker$u20$as$u20$core..default..Default$GT$7default17h0e669666531809ccE DW.ref.rust_eh_personality // 74 `
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atomic_waker-0451c32a97f709fe.atomic_waker.14b4a2cc3a4097bc-cgu.0.rcgu.o/
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lib.rmeta/ 0 0 0 644 14544 `
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ELF · P7 @ @ GNU À rust
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5 #rustc 1.96.0 (ac68faa20 2026-05-25)ÁíàÄTËŸ ÜJîÄ)'ß\¥! -3d1337db07d0b3aeÁ ¤°ð ¾ä-±($²ï=©Ã -7e98a21bfd32b0edÁ‰ AtomicUsizeÁ\§ » portable-atomicÁÜô í AtomicWakerÁ º wakerÁ WAITINGÁ REGISTERINGÁ WAKINGÁ æ
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AssertSyncÁ registerÁ wakeÁ takeÁ > ×
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ã�ã� WakerÁ ä�ƒ¸� È
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õ0ۼݼ޼© ß¼ à¼ÛἈ cSñŸ«‡zÙ¿ ‚ “ ¢G ü¿Fo G ´G ü«E‰ ý $ÁE ¤]¤] V ¦]Á‚] üß3ø¤”&‘ _ î0î0
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UnsafeCellÁ ð0»Ì- ·}—KEüC£Ä d Ä d ¢� ‘ í ¸T¯ î0 × Å ` F4í ÃÀ F ÄÀ G<õ ÁÀ G ÂÀ Ì<þ ¿À Ì ÀÀ Ë,˜ ã� Š\á „Ä
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ü §� ü > ; `futures::task::AtomicWaker` extracted into its own crate.Á ? ú tC # FeaturesÁ R ú üVG D This crate adds a feature, `portable-atomic`, which uses a polyfillÁ üžH E from the [`portable-atomic`] crate in order to provide functionalityÁ üçN K to targets without atomics. See the [`README`] for the [`portable-atomic`]Á ü¶0 - crate for more information on how to use it.Á ç ú üëA > [`portable-atomic`]: https://crates.io/crates/portable-atomicÁ ü[ X [`README`]: https://github.com/taiki-e/portable-atomic/blob/main/README.md#optional-cfgÁ ahttps://raw.githubusercontent.com/smol-rs/smol/master/assets/images/logo_fullsize_transparent.pngÁ„¡ Þl§ íÈ ¸É î0 ×È ` FÇ ÃÀ FÙ ÄÀ GÇ ÁÀ GÙ ÂÀ ÌÇ ¿À ÌÚ ÀÀ ËÇ ã� ŠÆ „Ä
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”––´£ ‘L¿ …äÎ z}Z]9<ŒŒ üÍ ´Ù üµ0 - A synchronization primitive for task wakeup.Á æ ú üêI F Sometimes the task interested in a given event will change over time.Á ü´ N K An `AtomicWaker` can coordinate concurrent notifications with the consumerÁ üƒ
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L I potentially "updating" the underlying task to wake up. This is useful inÁ üÐ
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J G scenarios where a computation completes in another thread and wants toÁ ü› P M notify the consumer, but the consumer is in the process of being migrated toÁ ¼ì a new logical task.Á „ ú üˆ P M Consumers should call `register` before checking the result of a computationÁ üÙ J G and producers should call `wake` after producing the computation (thisÁ ü¤
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L I differs from the usual `thread::park` pattern). It is also permitted forÁ üñ
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G D `wake` to be called **before** `register`. This results in a no-op.Á ¹ ú ü½Q N A single `AtomicWaker` may be reused for any number of calls to `register` orÁ \� `wake`.Á › ú ¬Ÿ # Memory orderingÁ µ ú ü¹J G Calling `register` "acquires" all memory "released" by calls to `wake`Á ü„G D before the call to `register`. Later calls to `wake` will wake theÁ üÌP M registered waker (on contention this wake might be triggered in `register`).Á � ú ü¡O L For concurrent calls to `register` (should be avoided) the ordering is onlyÁ üñ$ ! guaranteed for the winning call.Á – ú tš # ExamplesÁ © ú üN K Here is a simple example providing a `Flag` that can be signalled manuallyÁ ¬ü when it is ready.Á ’ ú <– ```Á üž use futures::future::Future;Á ü¿4 1 use futures::task::{Context, Poll, AtomicWaker};Á ¼ô use std::sync::Arc;Á üŒ& # use std::sync::atomic::AtomicBool;Á ü³- * use std::sync::atomic::Ordering::Relaxed;Á ´á use std::pin::Pin;Á ø ú ”ü struct Inner {Á Ü� waker: AtomicWaker,Á Ä« set: AtomicBool,Á ,Ä }Á Ê ú ¤Î #[derive(Clone)]Á äã struct Flag(Arc<Inner>);Á € ú |„ impl Flag {Á ô” pub fn new() -> Self {Á ü³! Flag(Arc::new(Inner {Á üÕ* ' waker: AtomicWaker::new(),Á ü€, ) set: AtomicBool::new(false),Á | }))Á L½ }Á Ç ú ôË pub fn signal(&self) {Á üê, ) self.0.set.store(true, Relaxed);Á ü— self.0.waker.wake();Á L¸ ¼% , è" È ú ÔÌ impl Future for Flag {Á Ìç type Output = ();Á � ú ü…I F fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<()> {Á üÏA > // quick check to avoid registration if already done.Á ü‘) & if self.0.set.load(Relaxed) {Á ü»' $ return Poll::Ready(());Á lã
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}Á ñ ú üõ. + self.0.waker.register(cx.waker());Á ¤ ú ü¨K H // Need to check condition **after** `register` to avoid a raceÁ üôA > // condition that would result in lost notifications.Á ü¶ ) õ( üà Poll::Ready(())Á ¤€ } else {Á ì• Poll::PendingÁ l³ Ø) LÁ ¼% ,Ë è" <Ñ Þ \ä ý ³ª2G“*
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”ö ,ö ùüŽ ,Ž ® ¤ƒC <‰C ‘ÄåC \ëC ‘œÖD 4ÜD ‘„óD ý Ô«E äŠE Create an `AtomicWaker`.Á ¸E ý
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´÷E TýE Îì Ì÷E � 0 $‰F ¥0% ·0 ¥0/ ·0% Ì™F ¿ ü©W% üºG: 7 Registers the waker to be notified on calls to `wake`.Á ùG ú ü�HK H The new task will take place of any previous tasks that were registeredÁ üÑHJ G by previous calls to `register`. Any calls to `wake` that happen afterÁ ü IH E a call to `register` (as defined by the memory ordering rules), willÁ üíIL I notify the `register` caller's task and deregister the waker from futureÁ ü¾JI F notifications. Because of this, callers should ensure `register` getsÁ üŒKC @ invoked with a new `Waker` **each** time they require a wakeup.Á ÔK ú üÜKJ G It is safe to call `register` with multiple other threads concurrentlyÁ ü«LG D calling `wake`. This will result in the `register` caller's currentÁ ì÷L task being notified once.Á ™M ú ü¡MK H This function is safe to call concurrently, but this is generally a badÁ üñMK H idea. Concurrent calls to `register` will attempt to register differentÁ üÁNL I tasks to be notified. One of the callers will win and have its task set,Á ü’O> ; but there is no guarantee as to which caller will succeed.Á ÕO ú tÝO ¹ ðO ú üøO< 9 Here is how `register` is used when implementing a flag.Á ¹P ú <ÁP Þ üÍP ï üòP4 ™ ü«Q& ÷ üÖQ- §! ´ˆR Ý! £R ú Œ«R struct Flag {Á ÜÁR £" ÄáR Ç" ,þR è" ˆS ú Ô�S …' ̯S ¨' ÍS ú üÕSI ×' ü£TK H // Register **before** checking `set` to avoid a race conditionÁ üóT7 4 // that would result in lost notifications.Á ü¯U, ) self.waker.register(cx.waker());Á àU ú üèU' $ if self.set.load(Relaxed) {Á ü”V ì+ ¤¸V ”, ìÑV ±, lóV Ø) L…W ¼% ,“W è" <�W Þ D°W ý ¿ ¹W
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$ºW ƒ,ÀW ÙX <closure_kind>Á <closure_signature>Á <upvars>Á ‘‘ Ê?”¢~ ü”}: 7 Calls `wake` on the last `Waker` passed to `register`.Á Ó} ú üÛ}B ? If `register` has not been called yet, then this does nothing.Á$©~ ! !ý Ê? ®~
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$¯~ ü–‚# ü‘P M Returns the last `Waker` passed to `register`, so that the user can wake it.Á æ ú î ú üö[ X Sometimes, just waking the AtomicWaker is not fine grained enough. This allows the userÁ üÖ€[ X to take the waker and then wake it separately, rather than performing both steps in oneÁ ”¶� atomic action.Á Í� ú üÕ�< 9 If a waker has not been registered, this returns `None`.Á$�‚ " "ý Ä ¢‚
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âX ŒŒ Œ ! ¡ (https://crates.io/crates/portable-atomicÁ >https://github.com/taiki-e/portable-atomic/blob/main/README.mdÁ ¡ READMEÁ ÷I ÊI ¿J ÷I ¡ ÊI ¿J ¼—@:Ì¢´^*÷B§€p/-ÖLuˆÙüãĽ¯.CóV8óX¿öI¬ œaÌP*ÖôfÞ·X ’ƒ,Ì@]Vg÷{”;^ÃènQR"ÒÖŒ]Ã_Óh¶›PÒ€ÜëèƒâªóëÉ+·×»îO/êÜÝGp ÚÊøý›´8ÅÖ^U‘ h-n½R²©¼w›·ÉCl_ I–
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©ó 8è 7y à#@ùâ @ùá'@ù ”è#@ù ëèŸ ø¨ƒ8îÿÿà#@ùâ @ùá'@ù ”è#@ù ëèŸ ø¨ƒ8äÿÿà#@ùâ @ùá'@ù ”è#@ù ëèŸ ø¨ƒ8Úÿÿà#@ùâ @ùá'@ù ”è#@ù ëèŸ ø¨ƒ8Ðÿÿà#@ùâ @ùá'@ù ”è#@ù ëèŸ ø¨ƒ8Æÿÿà#@ùâ @ùá'@ù ”è#@ù ëèŸ ø¨ƒ8¼ÿÿà#@ùâ @ùá'@ù ”è#@ù ëèŸ ø¨ƒ8²ÿÿà#@ùâ @ùá'@ù ”è#@ù ëèŸ ø¨ƒ8¨ÿÿà#@ùâ @ùá'@ù ”è#@ù ëèŸ ø¨ƒ8žÿÿà#@ùâ @ùá'@ù ”è#@ù ëèŸ ø¨ƒ8”ÿÿà#@ùâ @ùá'@ù ”è#@ù ëèŸ ø¨ƒ8Šÿÿà#@ùâ @ùá'@ù ”è#@ù ëèŸ ø¨ƒ8€ÿÿè@ùè7 ù( €Rè3 ù è@ùè7 ùÿ3 ù à3@ùá7@ùý{M©ÿƒ‘À_Ö � ‘è ª¨ øˆ€R¨ƒ ø(
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@ù @ù ?Öý{A©ÿƒ ‘À_Öý{¿©ý ‘ ”ý{Á¨À_Öassertion failed: state == REGISTERING || state == REGISTERING | WAKING || state == WAKING/home/bernt/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/atomic-waker-1.1.2/src/lib.rs /rustc/ac68faa20c58cbccd01ee7208bf3b6e93a7d7f96/library/core/src/fmt/mod.rs /rustc/ac68faa20c58cbccd01ee7208bf3b6e93a7d7f96/library/core/src/ptr/const_ptr.rs /rustc/ac68faa20c58cbccd01ee7208bf3b6e93a7d7f96/library/core/src/sync/atomic.rs ^ ¥ ^ ! ^ H ^ L D assertion failed: state == REGISTERING || state == REGISTERING | WAKING ^ y K q * is_aligned_to: align is not a power-of-two Q ^
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there is no such thing as a release failure ordering O ¹ there is no such thing as an acquire-release failure ordering O ¸ unsafe precondition(s) violated: slice::from_raw_parts requires the pointer to be aligned and non-null, and the total size of the slice not to exceed `isize::MAX`
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