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Update serial_windows.go #117

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16 changes: 8 additions & 8 deletions serial_windows.go
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Original file line number Diff line number Diff line change
Expand Up @@ -209,7 +209,7 @@ func setCommState(h syscall.Handle, baud int, databits byte, parity Parity, stop
}

r, _, err := syscall.Syscall(nSetCommState, 2, uintptr(h), uintptr(unsafe.Pointer(&params)), 0)
if r == 0 {
if r == 0 || err != syscall.Errno(0) {
return err
}
return nil
Expand Down Expand Up @@ -259,15 +259,15 @@ func setCommTimeouts(h syscall.Handle, readTimeout time.Duration) error {
timeouts.ReadTotalTimeoutConstant = uint32(timeoutMs)

r, _, err := syscall.Syscall(nSetCommTimeouts, 2, uintptr(h), uintptr(unsafe.Pointer(&timeouts)), 0)
if r == 0 {
if r == 0 || err != syscall.Errno(0) {
return err
}
return nil
}

func setupComm(h syscall.Handle, in, out int) error {
r, _, err := syscall.Syscall(nSetupComm, 3, uintptr(h), uintptr(in), uintptr(out))
if r == 0 {
if r == 0 || err != syscall.Errno(0) {
return err
}
return nil
Expand All @@ -276,15 +276,15 @@ func setupComm(h syscall.Handle, in, out int) error {
func setCommMask(h syscall.Handle) error {
const EV_RXCHAR = 0x0001
r, _, err := syscall.Syscall(nSetCommMask, 2, uintptr(h), EV_RXCHAR, 0)
if r == 0 {
if r == 0 || err != syscall.Errno(0) {
return err
}
return nil
}

func resetEvent(h syscall.Handle) error {
r, _, err := syscall.Syscall(nResetEvent, 1, uintptr(h), 0, 0)
if r == 0 {
if r == 0 || err != syscall.Errno(0) {
return err
}
return nil
Expand All @@ -297,7 +297,7 @@ func purgeComm(h syscall.Handle) error {
const PURGE_RXCLEAR = 0x0008
r, _, err := syscall.Syscall(nPurgeComm, 2, uintptr(h),
PURGE_TXABORT|PURGE_RXABORT|PURGE_TXCLEAR|PURGE_RXCLEAR, 0)
if r == 0 {
if r == 0 || err != syscall.Errno(0) {
return err
}
return nil
Expand All @@ -306,7 +306,7 @@ func purgeComm(h syscall.Handle) error {
func newOverlapped() (*syscall.Overlapped, error) {
var overlapped syscall.Overlapped
r, _, err := syscall.Syscall6(nCreateEvent, 4, 0, 1, 0, 0, 0, 0)
if r == 0 {
if r == 0 || err != syscall.Errno(0) {
return nil, err
}
overlapped.HEvent = syscall.Handle(r)
Expand All @@ -319,7 +319,7 @@ func getOverlappedResult(h syscall.Handle, overlapped *syscall.Overlapped) (int,
uintptr(h),
uintptr(unsafe.Pointer(overlapped)),
uintptr(unsafe.Pointer(&n)), 1, 0, 0)
if r == 0 {
if r == 0 || err != syscall.Errno(0) {
return n, err
}

Expand Down