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fixed datarace

This commit is contained in:
Florian Sundermann 2016-10-12 09:13:12 +02:00
parent 3e02de6fc1
commit 8b1271e880
1 changed files with 8 additions and 1 deletions
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7
qr/errorcorrection.go
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@ -2,10 +2,13 @@ package qr
import ( import (
"github.com/boombuler/barcode/utils" "github.com/boombuler/barcode/utils"
"sync"
) )
type errorCorrection struct { type errorCorrection struct {
fld *utils.GaloisField fld *utils.GaloisField
m *sync.Mutex
polynomes []*utils.GFPoly polynomes []*utils.GFPoly
} }
@ -15,6 +18,7 @@ func newGF() *errorCorrection {
fld := utils.NewGaloisField(285) fld := utils.NewGaloisField(285)
return &errorCorrection{fld, return &errorCorrection{fld,
new(sync.Mutex),
[]*utils.GFPoly{ []*utils.GFPoly{
utils.NewGFPoly(fld, []byte{1}), utils.NewGFPoly(fld, []byte{1}),
}, },
@ -22,6 +26,9 @@ func newGF() *errorCorrection {
} }
func (ec *errorCorrection) getPolynomial(degree int) *utils.GFPoly { func (ec *errorCorrection) getPolynomial(degree int) *utils.GFPoly {
ec.m.Lock()
defer ec.m.Unlock()
if degree >= len(ec.polynomes) { if degree >= len(ec.polynomes) {
last := ec.polynomes[len(ec.polynomes)-1] last := ec.polynomes[len(ec.polynomes)-1]
for d := len(ec.polynomes); d <= degree; d++ { for d := len(ec.polynomes); d <= degree; d++ {