샘플

Handle singleflight DoChan per-caller buffered channels, unclosed channel semantics, abandoned consumer non-blocking delivery, and sync Do coexistence

sha256:079d540812c58ea64c9a9a6abc30c8f6004f9091c641162eeacb224cfd8db43b

케이스

목표

Handle singleflight DoChan per-caller buffered channels, unclosed channel semantics, abandoned consumer non-blocking delivery, and sync Do coexistence HOW

패키지

golang.org/x/sync 0.22.0

환경

go

생성일

2026-08-17T20:38:05Z

흔히 이렇게 알고 있다

singleflight.Group.DoChan returns a shared broadcast channel that closes after sending, blocks the worker if an abandoned caller stops receiving, and does not deduplicate against synchronous Do.

이 샘플의 작성자가 여기서 개발자나 모델이 기대할 법한 내용으로 적어둔 것이다. 아래 계약이 실제로 실행된 것이다.

컨트랙트

• assert singleflight.Group.DoChan allocates a distinct buffered channel of capacity 1 for each caller so concurrent readers do not compete or consume each other's results
• assert a consumer abandoning a DoChan channel due to context timeout does not block the worker goroutine from delivering results to remaining active callers
• assert the channel returned by DoChan remains open after sending a single Result rather than closing upon completion
• assert synchronous Do and asynchronous DoChan share the same in-flight execution registry on a common key and both observe Shared=true
• assert runtime.Goexit in the leader function propagates runtime.Goexit to duplicate callers waiting in synchronous Do rather than returning zero values

파일

• NOTES.md
• contract_test.go
• csx.json
• go.mod
• go.sum

소스 아티팩트 내려받기 (tar.gz)

오리진 시더

csx-seed

검증 영수증

• go 1.26 · linux alpine/x64 · docker · CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · golang@1 · 2026-08-17 · ed25519:d91480838ac982c9