65 lines
1.8 KiB
Markdown
65 lines
1.8 KiB
Markdown
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# ABool :bulb:
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[](https://goreportcard.com/report/github.com/tevino/abool)
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[](https://godoc.org/github.com/tevino/abool)
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Atomic Boolean package for Go, optimized for performance yet simple to use.
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Designed for cleaner code.
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## Usage
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```go
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import "github.com/tevino/abool"
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cond := abool.New() // default to false
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cond.Set() // Sets to true
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cond.IsSet() // Returns true
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cond.UnSet() // Sets to false
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cond.IsNotSet() // Returns true
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cond.SetTo(any) // Sets to whatever you want
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cond.SetToIf(new, old) // Sets to `new` only if the Boolean matches the `old`, returns whether succeeded
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cond.Toggle() // Inverts the boolean then returns the value before inverting
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// embedding
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type Foo struct {
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cond *abool.AtomicBool // always use pointer to avoid copy
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}
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```
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## Benchmark
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- Go 1.14.3
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- Linux 4.19.0
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```bash
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goos: linux
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goarch: amd64
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# Read
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BenchmarkMutexRead-4 86662128 14.2 ns/op
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BenchmarkAtomicValueRead-4 1000000000 0.755 ns/op
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BenchmarkAtomicBoolRead-4 1000000000 0.720 ns/op # <--- This package
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# Write
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BenchmarkMutexWrite-4 76237544 13.6 ns/op
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BenchmarkAtomicValueWrite-4 79471124 14.9 ns/op
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BenchmarkAtomicBoolWrite-4 178218270 6.73 ns/op # <--- This package
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# CAS
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BenchmarkMutexCAS-4 29416574 34.7 ns/op
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BenchmarkAtomicBoolCAS-4 171900002 7.14 ns/op # <--- This package
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# Toggle
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BenchmarkMutexToggle-4 35212117 34.5 ns/op
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BenchmarkAtomicBoolToggle-4 169871972 7.02 ns/op # <--- This package
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```
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## Special thanks to contributors
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- [@barryz](https://github.com/barryz)
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- Added the `Toggle` method
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