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package msgpack
import (
"reflect"
"sync"
)
var cachedValues struct {
m map[reflect.Type]chan reflect.Value
sync.RWMutex
}
func cachedValue(t reflect.Type) reflect.Value {
cachedValues.RLock()
ch := cachedValues.m[t]
cachedValues.RUnlock()
if ch != nil {
return <-ch
}
cachedValues.Lock()
defer cachedValues.Unlock()
if ch = cachedValues.m[t]; ch != nil {
return <-ch
}
ch = make(chan reflect.Value, 256)
go func() {
for {
ch <- reflect.New(t)
}
}()
if cachedValues.m == nil {
cachedValues.m = make(map[reflect.Type]chan reflect.Value, 8)
}
cachedValues.m[t] = ch
return <-ch
}
func (d *Decoder) newValue(t reflect.Type) reflect.Value {
if d.flags&usePreallocateValues == 0 {
return reflect.New(t)
}
return cachedValue(t)
}
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