File: c_string_cache.go

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golang-github-pzhin-go-sophia 0.0~git20180715.8bdc218-2
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package sophia

import (
	"sync"

	"C"
)

var cache = map[string]*C.char{}
var mLock sync.Mutex

func getCStringFromCache(str string) *C.char {
	cStr, ok := cache[str]
	if ok {
		return cStr
	}
	mLock.Lock()
	cStr, ok = cache[str]
	if ok {
		return cStr
	}
	cStr = cString(str)
	cache[str] = cStr
	mLock.Unlock()
	return cStr
}