mlogclub
42 lines
539 B
Go
42 lines
539 B
Go
package eventbus
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import (
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"reflect"
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"sync"
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)
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var (
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mu sync.RWMutex
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buss = make(map[reflect.Type]any)
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)
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func Get[T any]() *Bus[T] {
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key := eventTypeOf[T]()
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mu.RLock()
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bus, ok := buss[key]
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mu.RUnlock()
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if ok {
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return bus.(*Bus[T])
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}
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mu.Lock()
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defer mu.Unlock()
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if bus, ok = buss[key]; ok {
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return bus.(*Bus[T])
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}
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created := New[T]()
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buss[key] = created
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return created
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}
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func eventTypeOf[T any]() reflect.Type {
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typ := reflect.TypeFor[T]()
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if typ == nil {
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panic("eventbus: nil event type")
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}
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return typ
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}
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