套件： golang-golang-x-sync-dev (0.0~git20190911.cd5d95a-1)

Supplemental Go synchronization libraries

This package provides supplemental Go libraries (golang.org/x/sync) that were not included in the main distribution. It provides Go concurrency primitives in addition to the ones provided by the language ro the "sync" and "sync/atomic" packages.

Provides:

  - singleflight: provides a duplicate function call suppression mechanism
  - errgroup: provides synchronization, error propagation, and Context
              cancellation for groups of goroutines working on subtasks
  - semaphore: provides a weighted semaphore implementation
  - syncmap: provides a concurrent map implementation