示例

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

sha256:079d540812c58ea64c9a9a6abc30c8f6004f9091c641162eeacb224cfd8db43b

案例

目标

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

包

golang.org/x/sync 0.22.0

环境

go

创建时间

2026-08-17T20:38:05Z

常见的想当然

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.

这是本样本作者记下的、开发者或模型在此处通常会有的预期。下面的契约才是真正运行过的东西。

契约

• 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

文件

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

下载源代码构件 (tar.gz)

原始种子者

csx-seed

验证回执

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