Help us shape the future of Go! Take the 2026 Go Developer Survey

Why Go
- Case Studies
  
  Common problems companies solve with Go
- Use Cases
  
  Stories about how and why companies use Go
- Security
  
  How Go can help keep you secure by default
Learn
Docs
- Effective Go
  
  Tips for writing clear, performant, and idiomatic Go code
- Go User Manual
  
  A complete introduction to building software with Go
- Standard library
  
  Reference documentation for Go's standard library
- Release Notes
  
  Learn what's new in each Go release
- API
  
  Reference documentation for the pkg.go.dev API
Packages
Community
- Recorded Talks
  
  Videos from prior events
- Meetups
  
  Meet other local Go developers
- Conferences
  
  Learn and network with Go developers from around the world
- Go blog
  
  The Go project's official blog.
- Go project
  
  Get help and stay informed from Go
- Get connected

syncs

package module

Go to main page

Versions in this module

v1

v1.3.4

Oct 3, 2026

v1.3.3

Aug 18, 2026

Changes in this version

type MultiError

+ func (m *MultiError) Unwrap() []error

v1.3.2

Jul 18, 2023

Changes in this version

+ type MultiError struct

+ func (m *MultiError) Error() string

+ func (m *MultiError) ErrorOrNil() error

+ func (m *MultiError) Errors() []error

v1.3.1

May 23, 2023

v1.3.0

Apr 9, 2023

Changes in this version

+ func Discard(o *options)

+ type Locker interface

+ TryLock func() bool

v1.2.0

Dec 9, 2021

v1.1.1

May 10, 2019

v1.1.0

Feb 3, 2019

v1.0.0

Oct 8, 2018

Changes in this version

+ type ESGOption func(esg *errSizedGroup) error

v0

v0.10.4

Apr 27, 2020

Changes in this version

+ func NewSemaphore(capacity int) sync.Locker

+ func Preemptive(o *options)

+ func TermOnErr(o *options)

+ type ErrSizedGroup struct

+ func NewErrSizedGroup(size int, options ...GroupOption) *ErrSizedGroup

+ func (g *ErrSizedGroup) Go(f func() error)

+ func (g *ErrSizedGroup) Wait() error

+ type GroupOption func(o *options)

+ func Context(ctx context.Context) GroupOption

+ type SizedGroup struct

+ func NewSizedGroup(size int, opts ...GroupOption) *SizedGroup

+ func (g *SizedGroup) Go(fn func(ctx context.Context))

+ func (g *SizedGroup) Wait()