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

nsync

package module

Go to main page

Versions in this module

v1

v1.0.0

Oct 3, 2026

Changes in this version

+ var ErrAborted = errors.New("nsync: control wait group aborted")

+ type ControlWaitGroup struct

+ func NewControlWaitGroup(poolSize int) *ControlWaitGroup

+ func (cwg *ControlWaitGroup) Abort()

+ func (cwg *ControlWaitGroup) Do(userFunc func()) bool

+ func (cwg *ControlWaitGroup) DoContext(ctx context.Context, userFunc func()) error

+ func (cwg *ControlWaitGroup) Wait()

+ func (cwg *ControlWaitGroup) WaitContext(ctx context.Context) error

+ func (cwg *ControlWaitGroup) Waiting() int

+ func (cwg *ControlWaitGroup) Working() int

+ type NamedMutex struct

+ func NewNamedMutex() *NamedMutex

+ func (nm *NamedMutex) Lock(name string)

+ func (nm *NamedMutex) LockContext(ctx context.Context, name string) error

+ func (nm *NamedMutex) TryLock(name string) bool

+ func (nm *NamedMutex) TryLockTimeout(name string, timeout time.Duration) bool

+ func (nm *NamedMutex) Unlock(name string)

+ type NamedOnceMutex struct

+ func NewNamedOnceMutex() *NamedOnceMutex

+ func (nom *NamedOnceMutex) Lock(key any) bool

+ func (nom *NamedOnceMutex) LockContext(ctx context.Context, key any) (bool, error)

+ func (nom *NamedOnceMutex) Unlock(key any)

+ type OnceMutex struct

+ func NewOnceMutex() *OnceMutex

+ func (om *OnceMutex) Lock() bool

+ func (om *OnceMutex) LockContext(ctx context.Context) (bool, error)

+ func (om *OnceMutex) Unlock()

+ type Semaphore struct

+ func NewSemaphore(value int) *Semaphore

+ func (s *Semaphore) Acquire()

+ func (s *Semaphore) AcquireContext(ctx context.Context) error

+ func (s *Semaphore) Release()

+ func (s *Semaphore) TryAcquire() bool

+ func (s *Semaphore) TryAcquireTimeout(d time.Duration) bool

+ func (s *Semaphore) Value() int

+ type SyncFlag struct

+ func (bf *SyncFlag) IsSet() bool

+ func (bf *SyncFlag) IsUnset() bool

+ func (bf *SyncFlag) Set()

+ func (bf *SyncFlag) Unset()

+ type TryMutex struct

+ func NewTryMutex() *TryMutex

+ func (tm TryMutex) Lock()

+ func (tm TryMutex) LockContext(ctx context.Context) error

+ func (tm TryMutex) TryLock() bool

+ func (tm TryMutex) TryLockTimeout(timeout time.Duration) bool

+ func (tm TryMutex) Unlock()