Sync package
The sync package is Go’s standard-library package providing synchronization primitives for coordinating concurrent execution and protecting shared data.
100 Go Mistakes and How to Avoid Them
The sync package is a Go standard-library package providing synchronization primitives for coordinating concurrent execution and protecting shared state.
- How it is used
- Coordinates goroutines protecting shared state or waiting for updates, while guarding against copied synchronization values.
- How deep it goes
- Works through a condition-variable implementation and a copied-mutex data race, then gives receiver and field-type fixes.
- Examples
- Contrasts donation-goal listeners using a busy loop, channel, and sync.Cond; tests a counter with a copied mutex.
- What you can do after
- Diagnose/debug with it by recognizing copied locks and missed channel notifications, then choosing a shared lock or sync.Cond.
Read how 100 Go Mistakes and How to Avoid Them explains sync package →
Learn Go with Pocket-Sized Projects
sync is Go's standard-library package providing synchronization primitives such as mutexes, wait groups, and once-only execution controls.
- How it is used
- Coordinates goroutines and provides a synchronization point before the program continues or exits.
- How deep it goes
- Explains WaitGroup construction, Add, Done, Wait, deferred cleanup, and pointer semantics, but does not detail other sync types.
- Examples
- Demonstrates cooking rice and curry concurrently, including an error-channel variant and an errgroup.Group variant.
- What you can do after
- Apply it via Go's sync.WaitGroup to wait reliably for launched goroutines to complete.
Read how Learn Go with Pocket-Sized Projects explains sync package →
Learn Concurrent Programming with Go
sync is a Go standard-library package that provides synchronization primitives and related concurrency utilities.
- How it is used
- Protects shared variables when concurrent goroutines must update or read them safely.
- How deep it goes
- Defines mutual exclusion and demonstrates Lock and Unlock, stopping short of broader synchronization utilities.
- Examples
- Uses concurrent Stingy and Spendy functions to protect repeated additions and subtractions from a shared account balance.
- What you can do after
- Apply it via Go’s sync.Mutex to serialize access to shared state and avoid race conditions.
Read how Learn Concurrent Programming with Go explains sync package →
Related concepts
- WaitGrouphas part · WaitGroup is a synchronization type that counts concurrent operations and allows execution to wait until the counter reaches zero.
- standard librarypart of · A standard library is a collection of reusable modules, types, functions, APIs, and other facilities distributed with a programming language implementation or platform.
- lockingused by · Locking is a synchronization technique that restricts concurrent access to shared resources or protected operations.
- synchronizationuses · Synchronization coordinates operations, events, clocks, data, or states to establish required timing, ordering, visibility, or consistency relationships.
- rwlockalternative to · An RwLock is a synchronization primitive that permits multiple concurrent readers or one exclusive writer for protected data.
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