package lwt

  1. Overview
  2. No Docs
Promises and event-driven I/O

Install

dune-project
 Dependency

Authors

Maintainers

Sources

6.0.0-alpha00.tar.gz
md5=8a88c5d5fcb01d179bbb12e6b6888dca
sha512=bfecd3fa0a3461a3368bd7724e2fce7a751ba3899d590d5b08bc4257b058ca34ec25de1a3ead6585528afe77c6ca6db1c3e2d2421d6a773c845ef091472d2ed9

Description

A promise is a value that may become determined in the future.

Lwt provides typed, composable promises. Promises that are resolved by I/O are resolved by Lwt in parallel.

Meanwhile, OCaml code, including code creating and waiting on promises, runs in a single thread by default. This reduces the need for locks or other synchronization primitives. Code can be run in parallel on an opt-in basis.

Published: 24 Jul 2025

Dependencies (5)

  1. ocplib-endian
  2. dune-configurator
  3. cppo build & >= "1.1.0"
  4. ocaml >= "4.08"
  5. dune >= "2.7"

Dev Dependencies (3)

  1. bisect_ppx with-test
  2. odoc with-doc & >= "2.3.0"
  3. ocamlfind dev & >= "1.7.3-1"

  1. 0install >= "2.15.1"
  2. aches-lwt
  3. activitypub
  4. albatross
  5. alcotest-lwt
  6. alcotest-mirage
  7. ambient-context-lwt
  8. amqp-client >= "1.1.0"
  9. amqp-client-lwt
  10. angstrom-lwt-unix >= "0.11.0"
  11. anthill
  12. anycache-lwt
  13. archi-lwt
  14. arp
  15. awa-mirage
  16. aws-lwt
  17. aws-s3-lwt < "4.4.0" | >= "4.8.1"
  18. awsm-lwt
  19. azure-cosmos-db
  20. balancer
  21. bastet_lwt
  22. bimage-lwt
  23. bistro
  24. brisk-reconciler
  25. brozip
  26. builder
  27. builder-web
  28. bun >= "0.3.3"
  29. cachet-lwt
  30. calculon
  31. caldav
  32. camltc
  33. canary
  34. capnp-rpc-lwt < "2.0"
  35. capnp-rpc-unix < "2.1"
  36. caqti-lwt
  37. caqti-mirage
  38. carton < "1.0.0"
  39. carton-git
  40. carton-lwt
  41. catala-format >= "0.2.0"
  42. cf-lwt
  43. chamelon
  44. chamelon-unix
  45. chamo
  46. charrua-client
  47. charrua-unix
  48. clz
  49. cmdtui-lambda-term
  50. coap
  51. coap-server-lwt
  52. cohttp-curl-lwt
  53. cohttp-lwt
  54. cohttp-lwt-jsoo
  55. cohttp-lwt-unix
  56. cohttp-mirage
  57. cohttp-server-lwt-unix
  58. comby
  59. comby-semantic
  60. conan-lwt
  61. conduit-lwt
  62. conduit-lwt-unix
  63. cowabloga
  64. crunch
  65. cstruct-lwt
  66. csv-lwt
  67. ctypes >= "0.15.0" & < "0.21.1"
  68. ctypes-foreign >= "0.21.1"
  69. curl_lwt
  70. current
  71. current-albatross-deployer
  72. current_docker
  73. current_examples
  74. current_git
  75. current_github
  76. current_gitlab
  77. current_ocluster
  78. current_rpc
  79. current_slack
  80. current_web
  81. DkSDKFFIOCaml_Std
  82. dap
  83. data-encoding < "0.1.1"
  84. devkit >= "1.2"
  85. distributed-lwt
  86. dkim-bin < "0.8.0"
  87. dkim-lwt-unix
  88. dkim-mirage
  89. dlm
  90. dns-certify
  91. dns-cli
  92. dns-client < "7.0.3"
  93. dns-client-lwt
  94. dns-client-mirage
  95. dns-forward
  96. dns-forward-lwt-unix
  97. dns-lwt
  98. dns-mirage
  99. dns-resolver
  100. dns-server
  101. dns-stub
  102. dnssd
  103. docker_hub
  104. docteur >= "0.0.2"
  105. docteur-solo5
  106. docteur-unix >= "0.0.5"
  107. doi2bib
  108. dream
  109. dream-httpaf
  110. dream-pure
  111. dream-serve
  112. dropbox
  113. dune >= "3.17.2"
  114. dune-rpc-lwt
  115. earlybird
  116. elasticsearch-cli
  117. emoji >= "2.0.0"
  118. equinoxe
  119. ethernet
  120. ez_api >= "1.2.0"
  121. ezcurl-lwt
  122. ezjs_min < "0.2"
  123. ezjsonm-lwt
  124. ezresto
  125. ezresto-directory >= "0.5"
  126. faraday-lwt
  127. faraday-lwt-unix
  128. fat-filesystem
  129. fiber-lwt
  130. fsevents-lwt
  131. fswatch_lwt
  132. fuseau-lwt
  133. gdbprofiler
  134. git
  135. git-cohttp
  136. git-cohttp-unix
  137. git-kv >= "0.2.0"
  138. git-mirage
  139. git-paf
  140. git-unix >= "3.2.0"
  141. github
  142. github-hooks
  143. github-unix >= "4.4.0"
  144. gitlab-unix
  145. gitlab_pipeline_notifier
  146. gluten-lwt
  147. gluten-lwt-unix < "0.4.0"
  148. gluten-mirage < "0.4.0"
  149. graphql-lwt
  150. gremlin
  151. grpc-lwt
  152. guardian
  153. gufo
  154. h1
  155. h1-lwt-unix
  156. h2-lwt
  157. h2-lwt-unix < "0.10.0"
  158. h2-mirage
  159. happy-eyeballs-lwt
  160. happy-eyeballs-mirage
  161. hidapi-lwt
  162. hiredis >= "0.6"
  163. hl_yaml
  164. hockmd
  165. http-lwt-client
  166. http-mirage-client
  167. http-multipart-formdata >= "2.0.0" & < "3.0.0"
  168. httpaf-lwt-unix
  169. httpun-lwt
  170. httpun-mirage
  171. httpun-ws-lwt
  172. hvsock
  173. i3ipc
  174. influxdb-lwt
  175. inotify >= "2.4"
  176. inquire < "0.3.0"
  177. interface-prime-lwt
  178. ip2location
  179. ip2locationio
  180. ip2whois
  181. ipv6-multicast-lwt
  182. irc-client-lwt
  183. irc-client-lwt-ssl
  184. irc-client-tls
  185. irmin
  186. irmin-bench
  187. irmin-chunk
  188. irmin-cli
  189. irmin-client
  190. irmin-containers
  191. irmin-fs
  192. irmin-git
  193. irmin-graphql
  194. irmin-http
  195. irmin-indexeddb
  196. irmin-layers
  197. irmin-mirage-git
  198. irmin-mirage-graphql
  199. irmin-pack
  200. irmin-server
  201. irmin-test
  202. irmin-unix
  203. irmin-watcher
  204. joolog
  205. jose < "0.9.0"
  206. js_of_ocaml-lwt >= "3.5.0"
  207. jsoo_broadcastchannel
  208. jsoo_storage
  209. jupyter
  210. jupyter-kernel
  211. kafka < "0.5"
  212. kafka_lwt
  213. kappa-library
  214. ke >= "0.5"
  215. kinetic-client
  216. kubecaml
  217. lambda-runtime
  218. lambda-term
  219. lambda_streams_lwt
  220. launchd
  221. ldp
  222. learn-ocaml
  223. learn-ocaml-client
  224. ledgerwallet >= "0.4.0"
  225. letsencrypt
  226. letsencrypt-app
  227. letsencrypt-dns
  228. letters
  229. links >= "0.9.1"
  230. llama
  231. lru_cache
  232. lwt-canceler
  233. lwt-dllist
  234. lwt-exit
  235. lwt-parallel
  236. lwt-pipe
  237. lwt-pipeline
  238. lwt-watcher
  239. lwt_camlp4
  240. lwt_direct
  241. lwt_domain
  242. lwt_eio
  243. lwt_glib
  244. lwt_log
  245. lwt_ppx
  246. lwt_react
  247. lwt_retry
  248. lwt_ssl
  249. mariadb >= "1.2.0"
  250. markup = "0.7.6"
  251. markup-lwt
  252. mdx
  253. mechaml
  254. mehari-lwt-unix
  255. mehari-mirage
  256. memtrace-mirage
  257. metrics-influx
  258. metrics-lwt
  259. metrics-unix
  260. mimic
  261. mindstorm-lwt
  262. mirage < "4.0.0"
  263. mirage-block >= "2.0.1"
  264. mirage-block-ccm
  265. mirage-block-combinators
  266. mirage-block-lwt
  267. mirage-block-partition
  268. mirage-block-ramdisk
  269. mirage-block-solo5
  270. mirage-block-unikraft
  271. mirage-block-unix >= "2.14.2"
  272. mirage-block-xen
  273. mirage-channel >= "4.0.1"
  274. mirage-channel-lwt
  275. mirage-clock-lwt
  276. mirage-clock-unix < "4.2.0"
  277. mirage-console-lwt
  278. mirage-crypto-rng < "0.11.3"
  279. mirage-crypto-rng-lwt
  280. mirage-crypto-rng-mirage
  281. mirage-device >= "2.0.0"
  282. mirage-flow >= "3.0.0"
  283. mirage-flow-combinators
  284. mirage-flow-lwt
  285. mirage-flow-unix
  286. mirage-fs >= "4.0.0"
  287. mirage-fs-lwt
  288. mirage-kv >= "3.0.1"
  289. mirage-kv-lwt
  290. mirage-kv-unix
  291. mirage-net >= "4.0.0"
  292. mirage-net-lwt
  293. mirage-net-macosx
  294. mirage-net-solo5
  295. mirage-net-unikraft
  296. mirage-net-unix
  297. mirage-net-xen
  298. mirage-profile
  299. mirage-protocols >= "7.0.0"
  300. mirage-protocols-lwt
  301. mirage-qubes
  302. mirage-qubes-ipv4
  303. mirage-runtime
  304. mirage-sleep
  305. mirage-solo5
  306. mirage-stack = "3.0.0"
  307. mirage-stack-lwt
  308. mirage-time >= "3.0.0"
  309. mirage-time-lwt
  310. mirage-time-unix
  311. mirage-types-lwt
  312. mirage-unikraft
  313. mirage-unix
  314. mirage-vnetif
  315. mirage-xen
  316. monorobot
  317. moonpool-lwt
  318. mqtt
  319. mrmime >= "0.5.0"
  320. multipart-form-data
  321. multipart_form >= "0.2.0" & < "0.4.0"
  322. multipart_form-cohttp-lwt < "0.6.0"
  323. multipart_form-lwt
  324. mwt
  325. naboris
  326. nbd >= "4.0.3"
  327. nbd-tool
  328. nbd-unix
  329. nocrypto
  330. nottui-lwt
  331. nproc
  332. nsq
  333. obuilder
  334. obus >= "1.2.1"
  335. ocluster
  336. ocluster-api
  337. ocluster-worker
  338. ocplib-resto
  339. ocsigenserver
  340. ocsipersist
  341. ocsipersist-dbm
  342. ocsipersist-lib
  343. ocsipersist-pgsql
  344. ocsipersist-sqlite
  345. octez-distributed-lwt-internal
  346. octez-internal-libs
  347. octez-l2-libs
  348. octez-libs
  349. octez-proto-libs
  350. octez-protocol-compiler
  351. octez-proxy-server
  352. octez-rpc-process
  353. octez-shell-libs
  354. octez-smart-rollup-wasm-benchmark-lib
  355. oframl
  356. ojs_base
  357. omigrate
  358. oneffs
  359. opentelemetry-client-cohttp-lwt
  360. opentelemetry-cohttp-lwt >= "0.4"
  361. opentelemetry-lwt
  362. opium
  363. opium-graphql
  364. opium_kernel
  365. opomodoro
  366. order-i3-xfce
  367. ordma
  368. oskel >= "0.3.0"
  369. ounit-lwt < "2.2.0"
  370. ounit2-lwt
  371. owork
  372. ozulip
  373. paf
  374. paf-cohttp
  375. passage
  376. pcap-format < "0.5.2"
  377. petrol
  378. pgx_lwt
  379. pgx_lwt_mirage
  380. pgx_lwt_unix < "2.0"
  381. piaf < "0.2.0"
  382. picos >= "0.3.0" & < "0.5.0"
  383. picos_lwt
  384. picos_meta
  385. plebeia >= "2.0.0"
  386. plotkicadsch
  387. ppx_defer >= "0.4.0"
  388. ppx_deriving_rpc
  389. ppx_rapper_lwt
  390. proc-smaps
  391. prof_spacetime
  392. prometheus
  393. prometheus-app
  394. promise_jsoo_lwt
  395. protocol-9p
  396. protocol-9p-unix
  397. qcow
  398. qcow-stream
  399. qcow-tool
  400. qcow-types
  401. qfs >= "0.5"
  402. quests
  403. rawlink < "2.1"
  404. rawlink-lwt
  405. rdf_json_ld
  406. rdf_lwt
  407. redis-lwt
  408. reparse-lwt
  409. reparse-lwt-unix
  410. resource-pooling
  411. resp
  412. resp-mirage >= "0.10.0"
  413. resp-unix >= "0.10.0"
  414. resto
  415. resto-cohttp-client >= "0.4"
  416. resto-cohttp-self-serving-client
  417. resto-cohttp-server >= "0.4" & < "0.6" | >= "0.9"
  418. resto-directory >= "0.4"
  419. riak
  420. ringo-lwt
  421. river
  422. rock
  423. rpclib-js
  424. rpclib-lwt
  425. SZXX < "4.0.0"
  426. sanddb
  427. scgi
  428. sendmail-lwt
  429. sendmail-mirage
  430. serial
  431. server-reason-react
  432. session-cohttp-lwt
  433. session-cookie-lwt
  434. session-postgresql-lwt
  435. sessions
  436. shared-block-ring
  437. shared-memory-ring-lwt
  438. sherlodoc
  439. sihl < "0.2.0"
  440. slack
  441. slacko
  442. slipshow
  443. smtml
  444. speed
  445. spin < "0.8.0"
  446. spoke
  447. statocaml
  448. stk
  449. stog
  450. swapfs
  451. syguslib-utils
  452. syndic >= "1.4" & < "1.6.0"
  453. tar-mirage
  454. tar-unix
  455. tcpip
  456. telegraml
  457. terminus
  458. testo-lwt
  459. tezos-base >= "16.0"
  460. tezos-clic >= "16.0"
  461. tezos-crypto >= "16.0"
  462. tezos-crypto-dal
  463. tezos-error-monad >= "16.0"
  464. tezos-lwt-result-stdlib
  465. tezos-p2p = "12.3"
  466. tezos-protocol-environment
  467. tezos-proxy >= "17.3"
  468. tezos-stdlib
  469. tezos-stdlib-unix >= "16.0"
  470. tezos-test-helpers >= "12.3"
  471. tezos-wasmer
  472. tezos-webassembly-interpreter-extra
  473. tezt
  474. tidy_email
  475. timmy-lwt
  476. tls >= "0.10.6" & < "0.16.0"
  477. tls-lwt
  478. tls-mirage
  479. tube
  480. tuntap
  481. twirp_cohttp_lwt_unix
  482. uring
  483. uspf
  484. uspf-lwt
  485. uspf-mirage
  486. utop
  487. uwt
  488. vchan
  489. vchan-unix
  490. vchan-xen
  491. vercel
  492. vhd-format-lwt
  493. vmnet
  494. vpnkit
  495. vue-jsoo < "0.3"
  496. wayland < "2.0"
  497. webauthn
  498. xen-evtchn
  499. xen-evtchn-unix
  500. xen-gnt
  501. xen-gnt-unix
  502. xenstore
  503. xenstore_transport
  504. xlsx2csv
  505. yocaml_git
  506. yocaml_unix < "2.0.0"
  507. zarr-lwt
  508. zmq-lwt >= "5.2.1"

Conflicts

None

OCaml

Innovation. Community. Security.