diff options
Diffstat (limited to 'contrib')
| -rw-r--r-- | contrib/barcode/barcode.go | 21 |
1 files changed, 15 insertions, 6 deletions
diff --git a/contrib/barcode/barcode.go b/contrib/barcode/barcode.go index b2ba2c2..8fb371e 100644 --- a/contrib/barcode/barcode.go +++ b/contrib/barcode/barcode.go @@ -23,7 +23,7 @@ import ( "image/jpeg" "io" "strconv" - + "sync" "github.com/boombuler/barcode" "github.com/boombuler/barcode/codabar" "github.com/boombuler/barcode/code128" @@ -38,7 +38,11 @@ import ( // barcodes represents the barcodes that have been registered through this // package. They will later be used to be scaled and put on the page. -var barcodes map[string]barcode.Barcode +// RubenN: made this a struct with a mutex to prevent race condition +var barcodes struct { + sync.Mutex + cache map[string]barcode.Barcode +} // barcodePdf is a partial PDF implementation that only implements a subset of // functions that are required to add the barcode to the PDF. @@ -56,7 +60,9 @@ type barcodePdf interface { // // Positioning with x, y and flow is inherited from Fpdf.Image(). func Barcode(pdf barcodePdf, code string, x, y, w, h float64, flow bool) { - unscaled, ok := barcodes[code] + barcodes.Lock() + unscaled, ok := barcodes.cache[code] + barcodes.Unlock() if !ok { err := errors.New("Barcode not found") @@ -92,12 +98,15 @@ func Barcode(pdf barcodePdf, code string, x, y, w, h float64, flow bool) { // Register registers a barcode but does not put it on the page. Use Barcode() // with the same code to put the barcode on the PDF page. func Register(bcode barcode.Barcode) string { - if len(barcodes) == 0 { - barcodes = make(map[string]barcode.Barcode) + barcodes.Lock() + if len(barcodes.cache) == 0 { + barcodes.cache = make(map[string]barcode.Barcode) } key := barcodeKey(bcode) - barcodes[key] = bcode + barcodes.cache[key] = bcode + barcodes.Unlock() + return key } |