├── .gitignore ├── .travis.yml ├── Cargo.toml ├── LICENSE-MPL2 ├── Makefile ├── examples ├── echo.rs └── echo2.rs └── src └── lib.rs /.gitignore: -------------------------------------------------------------------------------- 1 | target 2 | Cargo.lock 3 | -------------------------------------------------------------------------------- /.travis.yml: -------------------------------------------------------------------------------- 1 | language: rust 2 | rust: 3 | # - stable 4 | # - beta 5 | - nightly 6 | 7 | script: 8 | - make all 9 | - make travistest 10 | - if [ "$TRAVIS_RUST_VERSION" == "nightly" ]; then make bench ; fi 11 | - if [ "$TRAVIS_RUST_VERSION" == "nightly" ]; then cargo build --no-default-features; fi 12 | 13 | env: 14 | global: 15 | - RUST_BACKTRACE=1 16 | matrix: 17 | - 18 | - RELEASE=true 19 | 20 | notifications: 21 | webhooks: 22 | urls: 23 | - https://webhooks.gitter.im/e/87a331e1a21456b6e2ad 24 | on_success: change # options: [always|never|change] default: always 25 | on_failure: change # options: [always|never|change] default: always 26 | on_start: false # default: false 27 | -------------------------------------------------------------------------------- /Cargo.toml: -------------------------------------------------------------------------------- 1 | [package] 2 | name = "tokio-fiber" 3 | version = "0.1.0" 4 | authors = ["Dawid Ciężarkiewicz "] 5 | 6 | [dependencies] 7 | fringe = { git = "https://github.com/nathan7/libfringe.git" } 8 | tokio-core = "0.1.1" 9 | futures = "0.1.6" 10 | 11 | [dev-dependencies] 12 | env_logger = "*" 13 | 14 | [replace] 15 | "tokio-core:0.1.1" = { git = "https://github.com/tokio-rs/tokio-core" } 16 | "futures:0.1.6" = { git = "https://github.com/alexcrichton/futures-rs" } 17 | -------------------------------------------------------------------------------- /LICENSE-MPL2: -------------------------------------------------------------------------------- 1 | Mozilla Public License Version 2.0 2 | ================================== 3 | 4 | 1. Definitions 5 | -------------- 6 | 7 | 1.1. "Contributor" 8 | means each individual or legal entity that creates, contributes to 9 | the creation of, or owns Covered Software. 10 | 11 | 1.2. "Contributor Version" 12 | means the combination of the Contributions of others (if any) used 13 | by a Contributor and that particular Contributor's Contribution. 14 | 15 | 1.3. "Contribution" 16 | means Covered Software of a particular Contributor. 17 | 18 | 1.4. "Covered Software" 19 | means Source Code Form to which the initial Contributor has attached 20 | the notice in Exhibit A, the Executable Form of such Source Code 21 | Form, and Modifications of such Source Code Form, in each case 22 | including portions thereof. 23 | 24 | 1.5. "Incompatible With Secondary Licenses" 25 | means 26 | 27 | (a) that the initial Contributor has attached the notice described 28 | in Exhibit B to the Covered Software; or 29 | 30 | (b) that the Covered Software was made available under the terms of 31 | version 1.1 or earlier of the License, but not also under the 32 | terms of a Secondary License. 33 | 34 | 1.6. "Executable Form" 35 | means any form of the work other than Source Code Form. 36 | 37 | 1.7. "Larger Work" 38 | means a work that combines Covered Software with other material, in 39 | a separate file or files, that is not Covered Software. 40 | 41 | 1.8. "License" 42 | means this document. 43 | 44 | 1.9. "Licensable" 45 | means having the right to grant, to the maximum extent possible, 46 | whether at the time of the initial grant or subsequently, any and 47 | all of the rights conveyed by this License. 48 | 49 | 1.10. "Modifications" 50 | means any of the following: 51 | 52 | (a) any file in Source Code Form that results from an addition to, 53 | deletion from, or modification of the contents of Covered 54 | Software; or 55 | 56 | (b) any new file in Source Code Form that contains any Covered 57 | Software. 58 | 59 | 1.11. "Patent Claims" of a Contributor 60 | means any patent claim(s), including without limitation, method, 61 | process, and apparatus claims, in any patent Licensable by such 62 | Contributor that would be infringed, but for the grant of the 63 | License, by the making, using, selling, offering for sale, having 64 | made, import, or transfer of either its Contributions or its 65 | Contributor Version. 66 | 67 | 1.12. "Secondary License" 68 | means either the GNU General Public License, Version 2.0, the GNU 69 | Lesser General Public License, Version 2.1, the GNU Affero General 70 | Public License, Version 3.0, or any later versions of those 71 | licenses. 72 | 73 | 1.13. "Source Code Form" 74 | means the form of the work preferred for making modifications. 75 | 76 | 1.14. "You" (or "Your") 77 | means an individual or a legal entity exercising rights under this 78 | License. For legal entities, "You" includes any entity that 79 | controls, is controlled by, or is under common control with You. For 80 | purposes of this definition, "control" means (a) the power, direct 81 | or indirect, to cause the direction or management of such entity, 82 | whether by contract or otherwise, or (b) ownership of more than 83 | fifty percent (50%) of the outstanding shares or beneficial 84 | ownership of such entity. 85 | 86 | 2. License Grants and Conditions 87 | -------------------------------- 88 | 89 | 2.1. Grants 90 | 91 | Each Contributor hereby grants You a world-wide, royalty-free, 92 | non-exclusive license: 93 | 94 | (a) under intellectual property rights (other than patent or trademark) 95 | Licensable by such Contributor to use, reproduce, make available, 96 | modify, display, perform, distribute, and otherwise exploit its 97 | Contributions, either on an unmodified basis, with Modifications, or 98 | as part of a Larger Work; and 99 | 100 | (b) under Patent Claims of such Contributor to make, use, sell, offer 101 | for sale, have made, import, and otherwise transfer either its 102 | Contributions or its Contributor Version. 103 | 104 | 2.2. Effective Date 105 | 106 | The licenses granted in Section 2.1 with respect to any Contribution 107 | become effective for each Contribution on the date the Contributor first 108 | distributes such Contribution. 109 | 110 | 2.3. Limitations on Grant Scope 111 | 112 | The licenses granted in this Section 2 are the only rights granted under 113 | this License. No additional rights or licenses will be implied from the 114 | distribution or licensing of Covered Software under this License. 115 | Notwithstanding Section 2.1(b) above, no patent license is granted by a 116 | Contributor: 117 | 118 | (a) for any code that a Contributor has removed from Covered Software; 119 | or 120 | 121 | (b) for infringements caused by: (i) Your and any other third party's 122 | modifications of Covered Software, or (ii) the combination of its 123 | Contributions with other software (except as part of its Contributor 124 | Version); or 125 | 126 | (c) under Patent Claims infringed by Covered Software in the absence of 127 | its Contributions. 128 | 129 | This License does not grant any rights in the trademarks, service marks, 130 | or logos of any Contributor (except as may be necessary to comply with 131 | the notice requirements in Section 3.4). 132 | 133 | 2.4. Subsequent Licenses 134 | 135 | No Contributor makes additional grants as a result of Your choice to 136 | distribute the Covered Software under a subsequent version of this 137 | License (see Section 10.2) or under the terms of a Secondary License (if 138 | permitted under the terms of Section 3.3). 139 | 140 | 2.5. Representation 141 | 142 | Each Contributor represents that the Contributor believes its 143 | Contributions are its original creation(s) or it has sufficient rights 144 | to grant the rights to its Contributions conveyed by this License. 145 | 146 | 2.6. Fair Use 147 | 148 | This License is not intended to limit any rights You have under 149 | applicable copyright doctrines of fair use, fair dealing, or other 150 | equivalents. 151 | 152 | 2.7. Conditions 153 | 154 | Sections 3.1, 3.2, 3.3, and 3.4 are conditions of the licenses granted 155 | in Section 2.1. 156 | 157 | 3. Responsibilities 158 | ------------------- 159 | 160 | 3.1. Distribution of Source Form 161 | 162 | All distribution of Covered Software in Source Code Form, including any 163 | Modifications that You create or to which You contribute, must be under 164 | the terms of this License. You must inform recipients that the Source 165 | Code Form of the Covered Software is governed by the terms of this 166 | License, and how they can obtain a copy of this License. You may not 167 | attempt to alter or restrict the recipients' rights in the Source Code 168 | Form. 169 | 170 | 3.2. Distribution of Executable Form 171 | 172 | If You distribute Covered Software in Executable Form then: 173 | 174 | (a) such Covered Software must also be made available in Source Code 175 | Form, as described in Section 3.1, and You must inform recipients of 176 | the Executable Form how they can obtain a copy of such Source Code 177 | Form by reasonable means in a timely manner, at a charge no more 178 | than the cost of distribution to the recipient; and 179 | 180 | (b) You may distribute such Executable Form under the terms of this 181 | License, or sublicense it under different terms, provided that the 182 | license for the Executable Form does not attempt to limit or alter 183 | the recipients' rights in the Source Code Form under this License. 184 | 185 | 3.3. Distribution of a Larger Work 186 | 187 | You may create and distribute a Larger Work under terms of Your choice, 188 | provided that You also comply with the requirements of this License for 189 | the Covered Software. If the Larger Work is a combination of Covered 190 | Software with a work governed by one or more Secondary Licenses, and the 191 | Covered Software is not Incompatible With Secondary Licenses, this 192 | License permits You to additionally distribute such Covered Software 193 | under the terms of such Secondary License(s), so that the recipient of 194 | the Larger Work may, at their option, further distribute the Covered 195 | Software under the terms of either this License or such Secondary 196 | License(s). 197 | 198 | 3.4. Notices 199 | 200 | You may not remove or alter the substance of any license notices 201 | (including copyright notices, patent notices, disclaimers of warranty, 202 | or limitations of liability) contained within the Source Code Form of 203 | the Covered Software, except that You may alter any license notices to 204 | the extent required to remedy known factual inaccuracies. 205 | 206 | 3.5. Application of Additional Terms 207 | 208 | You may choose to offer, and to charge a fee for, warranty, support, 209 | indemnity or liability obligations to one or more recipients of Covered 210 | Software. However, You may do so only on Your own behalf, and not on 211 | behalf of any Contributor. You must make it absolutely clear that any 212 | such warranty, support, indemnity, or liability obligation is offered by 213 | You alone, and You hereby agree to indemnify every Contributor for any 214 | liability incurred by such Contributor as a result of warranty, support, 215 | indemnity or liability terms You offer. You may include additional 216 | disclaimers of warranty and limitations of liability specific to any 217 | jurisdiction. 218 | 219 | 4. Inability to Comply Due to Statute or Regulation 220 | --------------------------------------------------- 221 | 222 | If it is impossible for You to comply with any of the terms of this 223 | License with respect to some or all of the Covered Software due to 224 | statute, judicial order, or regulation then You must: (a) comply with 225 | the terms of this License to the maximum extent possible; and (b) 226 | describe the limitations and the code they affect. Such description must 227 | be placed in a text file included with all distributions of the Covered 228 | Software under this License. Except to the extent prohibited by statute 229 | or regulation, such description must be sufficiently detailed for a 230 | recipient of ordinary skill to be able to understand it. 231 | 232 | 5. Termination 233 | -------------- 234 | 235 | 5.1. The rights granted under this License will terminate automatically 236 | if You fail to comply with any of its terms. However, if You become 237 | compliant, then the rights granted under this License from a particular 238 | Contributor are reinstated (a) provisionally, unless and until such 239 | Contributor explicitly and finally terminates Your grants, and (b) on an 240 | ongoing basis, if such Contributor fails to notify You of the 241 | non-compliance by some reasonable means prior to 60 days after You have 242 | come back into compliance. Moreover, Your grants from a particular 243 | Contributor are reinstated on an ongoing basis if such Contributor 244 | notifies You of the non-compliance by some reasonable means, this is the 245 | first time You have received notice of non-compliance with this License 246 | from such Contributor, and You become compliant prior to 30 days after 247 | Your receipt of the notice. 248 | 249 | 5.2. If You initiate litigation against any entity by asserting a patent 250 | infringement claim (excluding declaratory judgment actions, 251 | counter-claims, and cross-claims) alleging that a Contributor Version 252 | directly or indirectly infringes any patent, then the rights granted to 253 | You by any and all Contributors for the Covered Software under Section 254 | 2.1 of this License shall terminate. 255 | 256 | 5.3. In the event of termination under Sections 5.1 or 5.2 above, all 257 | end user license agreements (excluding distributors and resellers) which 258 | have been validly granted by You or Your distributors under this License 259 | prior to termination shall survive termination. 260 | 261 | ************************************************************************ 262 | * * 263 | * 6. Disclaimer of Warranty * 264 | * ------------------------- * 265 | * * 266 | * Covered Software is provided under this License on an "as is" * 267 | * basis, without warranty of any kind, either expressed, implied, or * 268 | * statutory, including, without limitation, warranties that the * 269 | * Covered Software is free of defects, merchantable, fit for a * 270 | * particular purpose or non-infringing. The entire risk as to the * 271 | * quality and performance of the Covered Software is with You. * 272 | * Should any Covered Software prove defective in any respect, You * 273 | * (not any Contributor) assume the cost of any necessary servicing, * 274 | * repair, or correction. This disclaimer of warranty constitutes an * 275 | * essential part of this License. No use of any Covered Software is * 276 | * authorized under this License except under this disclaimer. * 277 | * * 278 | ************************************************************************ 279 | 280 | ************************************************************************ 281 | * * 282 | * 7. Limitation of Liability * 283 | * -------------------------- * 284 | * * 285 | * Under no circumstances and under no legal theory, whether tort * 286 | * (including negligence), contract, or otherwise, shall any * 287 | * Contributor, or anyone who distributes Covered Software as * 288 | * permitted above, be liable to You for any direct, indirect, * 289 | * special, incidental, or consequential damages of any character * 290 | * including, without limitation, damages for lost profits, loss of * 291 | * goodwill, work stoppage, computer failure or malfunction, or any * 292 | * and all other commercial damages or losses, even if such party * 293 | * shall have been informed of the possibility of such damages. This * 294 | * limitation of liability shall not apply to liability for death or * 295 | * personal injury resulting from such party's negligence to the * 296 | * extent applicable law prohibits such limitation. Some * 297 | * jurisdictions do not allow the exclusion or limitation of * 298 | * incidental or consequential damages, so this exclusion and * 299 | * limitation may not apply to You. * 300 | * * 301 | ************************************************************************ 302 | 303 | 8. Litigation 304 | ------------- 305 | 306 | Any litigation relating to this License may be brought only in the 307 | courts of a jurisdiction where the defendant maintains its principal 308 | place of business and such litigation shall be governed by laws of that 309 | jurisdiction, without reference to its conflict-of-law provisions. 310 | Nothing in this Section shall prevent a party's ability to bring 311 | cross-claims or counter-claims. 312 | 313 | 9. Miscellaneous 314 | ---------------- 315 | 316 | This License represents the complete agreement concerning the subject 317 | matter hereof. If any provision of this License is held to be 318 | unenforceable, such provision shall be reformed only to the extent 319 | necessary to make it enforceable. Any law or regulation which provides 320 | that the language of a contract shall be construed against the drafter 321 | shall not be used to construe this License against a Contributor. 322 | 323 | 10. Versions of the License 324 | --------------------------- 325 | 326 | 10.1. New Versions 327 | 328 | Mozilla Foundation is the license steward. Except as provided in Section 329 | 10.3, no one other than the license steward has the right to modify or 330 | publish new versions of this License. Each version will be given a 331 | distinguishing version number. 332 | 333 | 10.2. Effect of New Versions 334 | 335 | You may distribute the Covered Software under the terms of the version 336 | of the License under which You originally received the Covered Software, 337 | or under the terms of any subsequent version published by the license 338 | steward. 339 | 340 | 10.3. Modified Versions 341 | 342 | If you create software not governed by this License, and you want to 343 | create a new license for such software, you may create and use a 344 | modified version of this License if you rename the license and remove 345 | any references to the name of the license steward (except to note that 346 | such modified license differs from this License). 347 | 348 | 10.4. Distributing Source Code Form that is Incompatible With Secondary 349 | Licenses 350 | 351 | If You choose to distribute Source Code Form that is Incompatible With 352 | Secondary Licenses under the terms of this version of the License, the 353 | notice described in Exhibit B of this License must be attached. 354 | 355 | Exhibit A - Source Code Form License Notice 356 | ------------------------------------------- 357 | 358 | This Source Code Form is subject to the terms of the Mozilla Public 359 | License, v. 2.0. If a copy of the MPL was not distributed with this 360 | file, You can obtain one at http://mozilla.org/MPL/2.0/. 361 | 362 | If it is not possible or desirable to put the notice in a particular 363 | file, then You may include the notice in a location (such as a LICENSE 364 | file in a relevant directory) where a recipient would be likely to look 365 | for such a notice. 366 | 367 | You may add additional accurate notices of copyright ownership. 368 | 369 | Exhibit B - "Incompatible With Secondary Licenses" Notice 370 | --------------------------------------------------------- 371 | 372 | This Source Code Form is "Incompatible With Secondary Licenses", as 373 | defined by the Mozilla Public License, v. 2.0. 374 | -------------------------------------------------------------------------------- /Makefile: -------------------------------------------------------------------------------- 1 | PKG_NAME=$(shell grep name Cargo.toml | head -n 1 | awk -F \" '{print $$2}') 2 | DOCS_DEFAULT_MODULE=$(PKG_NAME) 3 | ifeq (, $(shell which cargo-check 2> /dev/null)) 4 | DEFAULT_TARGET=build 5 | else 6 | DEFAULT_TARGET=build 7 | endif 8 | 9 | default: $(DEFAULT_TARGET) 10 | 11 | ALL_TARGETS += build $(EXAMPLES) test doc 12 | ifneq ($(RELEASE),) 13 | $(info RELEASE BUILD: $(PKG_NAME)) 14 | CARGO_FLAGS += --release 15 | ALL_TARGETS += bench 16 | else 17 | $(info DEBUG BUILD: $(PKG_NAME); use `RELEASE=true make [args]` for release build) 18 | endif 19 | 20 | EXAMPLES = $(shell cd examples 2>/dev/null && ls *.rs 2>/dev/null | sed -e 's/.rs$$//g' ) 21 | 22 | all: $(ALL_TARGETS) 23 | 24 | .PHONY: run test build doc clean clippy 25 | run test build clean: 26 | cargo $@ $(CARGO_FLAGS) 27 | 28 | check: 29 | $(info Running check; use `make build` to actually build) 30 | cargo $@ $(CARGO_FLAGS) 31 | 32 | clippy: 33 | cargo build --features clippy 34 | 35 | .PHONY: bench 36 | bench: 37 | cargo $@ $(filter-out --release,$(CARGO_FLAGS)) 38 | 39 | .PHONY: travistest 40 | travistest: 41 | for i in `seq 3`; do make test || exit 1 ; done 42 | 43 | .PHONY: longtest 44 | longtest: 45 | @echo "Running longtest. Press Ctrl+C to stop at any time" 46 | @sleep 2 47 | @i=0; while i=$$((i + 1)) && echo "Iteration $$i" && make test ; do :; done 48 | 49 | .PHONY: $(EXAMPLES) 50 | $(EXAMPLES): 51 | cargo build --example $@ $(CARGO_FLAGS) 52 | 53 | .PHONY: doc 54 | doc: FORCE 55 | rm -rf target/doc 56 | cargo doc 57 | 58 | .PHONY: publishdoc 59 | publishdoc: doc 60 | echo '' > target/doc/index.html 61 | ghp-import -n target/doc 62 | git push -f origin gh-pages 63 | 64 | .PHONY: docview 65 | docview: doc 66 | xdg-open target/doc/$(PKG_NAME)/index.html 67 | 68 | .PHONY: FORCE 69 | FORCE: 70 | -------------------------------------------------------------------------------- /examples/echo.rs: -------------------------------------------------------------------------------- 1 | //! An echo server that just writes back everything that's written to it. 2 | //! 3 | //! If you're on unix you can test this out by in one terminal executing: 4 | //! 5 | //! ```sh 6 | //! $ cargo run --example echo 7 | //! ``` 8 | //! 9 | //! and in another terminal you can run: 10 | //! 11 | //! ```sh 12 | //! $ nc localhost 8080 13 | //! ``` 14 | //! 15 | //! Each line you type in to the `nc` terminal should be echo'd back to you! 16 | 17 | extern crate env_logger; 18 | extern crate futures; 19 | extern crate tokio_core; 20 | #[macro_use] 21 | extern crate tokio_fiber; 22 | 23 | use std::env; 24 | use std::net::SocketAddr; 25 | 26 | use futures::Future; 27 | use futures::stream::Stream; 28 | use tokio_core::net::TcpListener; 29 | use tokio_core::reactor::Core; 30 | 31 | use std::io::{self, Read, Write}; 32 | 33 | fn main() { 34 | env_logger::init().unwrap(); 35 | let addr = env::args().nth(1).unwrap_or("127.0.0.1:8080".to_string()); 36 | let addr = addr.parse::().unwrap(); 37 | 38 | // Create the event loop that will drive this server 39 | let mut l = Core::new().unwrap(); 40 | let handle = l.handle(); 41 | 42 | // Create a TCP listener which will listen for incoming connections 43 | let socket = TcpListener::bind(&addr, &handle).unwrap(); 44 | 45 | // Once we've got the TCP listener, inform that we have it 46 | println!("Listening on: {}", addr); 47 | 48 | // Pull out the stream of incoming connections and then for each new 49 | // one spin up a new task copying data. 50 | // 51 | // We use the `io::copy` future to copy all data from the 52 | // reading half onto the writing half. 53 | let done = socket.incoming().for_each(move |(mut conn, _addr)| { 54 | let fib = tokio_fiber::Fiber::new(move || -> io::Result<()> { 55 | let mut buf = [0u8; 1024 * 64]; 56 | loop { 57 | let size = poll!(conn.read(&mut buf))?; 58 | if size == 0 {/* eof */ break; } 59 | let _ = poll!(conn.write_all(&mut buf[0..size]))?; 60 | } 61 | 62 | Ok(()) 63 | }); 64 | 65 | let fib = fib.map_err(|e| { 66 | println!("error: {}", e); 67 | }); 68 | 69 | handle.spawn(fib); 70 | 71 | Ok(()) 72 | }); 73 | l.run(done).unwrap(); 74 | } 75 | -------------------------------------------------------------------------------- /examples/echo2.rs: -------------------------------------------------------------------------------- 1 | //! An echo server that just writes back everything that's written to it. 2 | //! 3 | //! If you're on unix you can test this out by in one terminal executing: 4 | //! 5 | //! ```sh 6 | //! $ cargo run --example echo 7 | //! ``` 8 | //! 9 | //! and in another terminal you can run: 10 | //! 11 | //! ```sh 12 | //! $ nc localhost 8080 13 | //! ``` 14 | //! 15 | //! Each line you type in to the `nc` terminal should be echo'd back to you! 16 | 17 | extern crate env_logger; 18 | extern crate futures; 19 | extern crate tokio_core; 20 | #[macro_use] 21 | extern crate tokio_fiber; 22 | 23 | use std::env; 24 | use std::net::SocketAddr; 25 | 26 | use futures::Future; 27 | use tokio_core::net::TcpListener; 28 | use tokio_core::reactor::Core; 29 | 30 | use std::io::{self, Read, Write}; 31 | 32 | fn main() { 33 | env_logger::init().unwrap(); 34 | let addr = env::args().nth(1).unwrap_or("127.0.0.1:8080".to_string()); 35 | let addr = addr.parse::().unwrap(); 36 | 37 | // Create the event loop that will drive this server 38 | let mut l = Core::new().unwrap(); 39 | let handle = l.handle(); 40 | let remote = handle.remote().clone(); 41 | 42 | // Create a TCP listener which will listen for incoming connections 43 | let mut socket = TcpListener::bind(&addr, &handle).unwrap(); 44 | 45 | // Once we've got the TCP listener, inform that we have it 46 | println!("Listening on: {}", addr); 47 | 48 | let fiber = tokio_fiber::Fiber::new(move || -> io::Result<()> { 49 | loop { 50 | let (mut conn, _addr) = poll!(socket.accept())?; 51 | 52 | let conn_fib = tokio_fiber::Fiber::new(move || -> io::Result<()> { 53 | let mut buf = [0u8; 1024 * 64]; 54 | loop { 55 | let size = poll!(conn.read(&mut buf))?; 56 | if size == 0 {/* eof */ break; } 57 | let _ = poll!(conn.write_all(&mut buf[0..size]))?; 58 | } 59 | 60 | Ok(()) 61 | }); 62 | 63 | remote.spawn(|_handle| { 64 | conn_fib.map_err(|e| { 65 | println!("error: {}", e); 66 | }) 67 | }); 68 | 69 | } 70 | }); 71 | 72 | l.run(fiber.map_err(|e| { 73 | println!("error: {}", e); 74 | })).unwrap(); 75 | } 76 | -------------------------------------------------------------------------------- /src/lib.rs: -------------------------------------------------------------------------------- 1 | extern crate fringe; 2 | extern crate tokio_core; 3 | #[macro_use(task_local)] 4 | extern crate futures; 5 | 6 | use futures::Async; 7 | 8 | use std::cell::{RefCell, UnsafeCell}; 9 | 10 | /// Convenient macro to suspend and retry async operation 11 | /// just as it was blocking operation 12 | #[macro_export] 13 | macro_rules! poll { 14 | ($e:expr) => {{ 15 | let res; 16 | loop { 17 | match $e { 18 | Err(ref e) if e.kind() == ::std::io::ErrorKind::WouldBlock => { 19 | $crate::yield_now(); 20 | } 21 | other => { 22 | res = Some(other); 23 | break 24 | }, 25 | } 26 | } 27 | res.unwrap() 28 | }} 29 | } 30 | 31 | task_local! { 32 | static TL_YIELDER : RefCell> = RefCell::new(vec!()) 33 | } 34 | 35 | // Unsafe magic to for task-local yidler 36 | // 37 | // TODO: Need wiser people to verify this not not buggy 38 | // 39 | // `fringe` gives coroutine `&'a mut Yielder` 40 | // 41 | // to have access to it from `yield_now`, use 42 | // an escape hatch and be extremely careful 43 | struct YielderRefStore(UnsafeCell<&'static Yield>); 44 | 45 | impl YielderRefStore { 46 | unsafe fn new<'a>(y : &'a Yield) -> YielderRefStore { 47 | YielderRefStore ( 48 | UnsafeCell::new(std::mem::transmute(y)) 49 | ) 50 | } 51 | } 52 | 53 | unsafe impl Send for YielderRefStore {} 54 | 55 | // Wrapper over `fringe::Yielder` to make put it in `task_local` 56 | trait Yield { 57 | fn suspend(&self); 58 | } 59 | 60 | impl Yield for fringe::generator::Yielder> { 61 | fn suspend(&self) { 62 | let _ = self.suspend(Ok(Async::NotReady)); 63 | } 64 | } 65 | // We wake up coroutine passing this to it's inside 66 | enum ResumeCommand { 67 | Unblock 68 | } 69 | 70 | // We suspend coroutine passing this to the outside 71 | pub type SuspendCommand = futures::Poll; 72 | 73 | unsafe fn yielder_tl_push(y : &Yield) { 74 | TL_YIELDER.with(|tl_yielder| { 75 | let mut tl_yielder = tl_yielder.borrow_mut(); 76 | tl_yielder.push(YielderRefStore::new(y)); 77 | }); 78 | } 79 | 80 | unsafe fn yielder_tl_pop() -> &'static Yield { 81 | let yielder : YielderRefStore = TL_YIELDER.with(|tl_yielder| { 82 | let mut tl_yielder = tl_yielder.borrow_mut(); 83 | tl_yielder.pop().unwrap() 84 | }); 85 | 86 | yielder.0.into_inner() 87 | } 88 | 89 | 90 | pub struct Fiber<'a, O : Send+'a, E : Send+'a> { 91 | co : fringe::Generator<'a, ResumeCommand, SuspendCommand, fringe::OsStack>, 92 | } 93 | 94 | impl<'a, O : Send, E : Send> Fiber<'a, O, E> { 95 | pub fn new(f : F) -> Self 96 | where 97 | F: FnOnce() -> Result + Send +'a { 98 | let stack = fringe::OsStack::new(1 << 20).unwrap(); 99 | let gen = fringe::Generator::new(stack, move |yielder, _resume_cmd : ResumeCommand| { 100 | unsafe { yielder_tl_push(yielder) }; 101 | 102 | let res = f(); 103 | 104 | // pop the `Yield`, but use the "typed" version 105 | let _pop_and_discard = unsafe { yielder_tl_pop() }; 106 | // TODO: can any optimizations prevent `yielder` to see 107 | // changes introduced when task-local version was used? 108 | 109 | yielder.suspend(match res { 110 | Ok(t) => Ok(Async::Ready(t)), 111 | Err(e) => Err(e) 112 | }); 113 | }); 114 | 115 | Fiber { 116 | co : gen 117 | } 118 | } 119 | } 120 | 121 | impl<'a, O : Send, E : Send> futures::Future for Fiber<'a, O, E> { 122 | type Item = O; 123 | type Error = E; 124 | fn poll(&mut self) -> futures::Poll { 125 | self.co.resume(ResumeCommand::Unblock).expect("poll on finished Fiber is illegal") 126 | } 127 | } 128 | 129 | /// Yield the current fiber 130 | /// 131 | /// Block current fiber. It will be resumed and thus this function will return, 132 | /// when the event loop decides it might be ready. This includes: previously 133 | /// blocked IO becoming unblocked etc. 134 | pub fn yield_now() { 135 | let y = unsafe { yielder_tl_pop() }; 136 | 137 | y.suspend(); 138 | 139 | unsafe { yielder_tl_push(y) } 140 | } 141 | 142 | /// Block current fiber to wait for result of another future 143 | pub fn await(mut f: F) -> Result { 144 | loop { 145 | match f.poll() { 146 | Ok(Async::NotReady) => yield_now(), 147 | Ok(Async::Ready(val)) => return Ok(val), 148 | Err(e) => return Err(e), 149 | }; 150 | } 151 | } 152 | --------------------------------------------------------------------------------