x/sys/windows: add serial comm functions

windows/syscall_windows.go

@@ -349,8 +349,19 @@ func NewCallbackCDecl(fn interface{}) uintptr {
 //sys	SetProcessPriorityBoost(process Handle, disable bool) (err error) = kernel32.SetProcessPriorityBoost
 //sys	GetProcessWorkingSetSizeEx(hProcess Handle, lpMinimumWorkingSetSize *uintptr, lpMaximumWorkingSetSize *uintptr, flags *uint32)
 //sys	SetProcessWorkingSetSizeEx(hProcess Handle, dwMinimumWorkingSetSize uintptr, dwMaximumWorkingSetSize uintptr, flags uint32) (err error)
+//sys	ClearCommBreak(handle Handle) (err error)
+//sys	ClearCommError(handle Handle, lpErrors *uint32, lpStat *ComStat) (err error)
+//sys	EscapeCommFunction(handle Handle, dwFunc uint32) (err error)
+//sys	GetCommState(handle Handle, lpDCB *DCB) (err error)
+//sys	GetCommModemStatus(handle Handle, lpModemStat *uint32) (err error)
 //sys	GetCommTimeouts(handle Handle, timeouts *CommTimeouts) (err error)
+//sys	PurgeComm(handle Handle, dwFlags uint32) (err error)
+//sys	SetCommBreak(handle Handle) (err error)
+//sys	SetCommMask(handle Handle, dwEvtMask uint32) (err error)
+//sys	SetCommState(handle Handle, lpDCB *DCB) (err error)
 //sys	SetCommTimeouts(handle Handle, timeouts *CommTimeouts) (err error)
+//sys	SetupComm(handle Handle, dwInQueue uint32, dwOutQueue uint32) (err error)
+//sys	WaitCommEvent(handle Handle, lpEvtMask *uint32, lpOverlapped *Overlapped) (err error)
 //sys	GetActiveProcessorCount(groupNumber uint16) (ret uint32)
 //sys	GetMaximumProcessorCount(groupNumber uint16) (ret uint32)
 //sys	EnumWindows(enumFunc uintptr, param unsafe.Pointer) (err error) = user32.EnumWindows
@@ -1835,3 +1846,73 @@ func ResizePseudoConsole(pconsole Handle, size Coord) error {
 	// accept arguments that can be casted to uintptr, and Coord can't.
 	return resizePseudoConsole(pconsole, *((*uint32)(unsafe.Pointer(&size))))
 }
+
+// DCB constants. See https://learn.microsoft.com/en-us/windows/win32/api/winbase/ns-winbase-dcb.
+const (
+	CBR_110    = 110
+	CBR_300    = 300
+	CBR_600    = 600
+	CBR_1200   = 1200
+	CBR_2400   = 2400
+	CBR_4800   = 4800
+	CBR_9600   = 9600
+	CBR_14400  = 14400
+	CBR_19200  = 19200
+	CBR_38400  = 38400
+	CBR_57600  = 57600
+	CBR_115200 = 115200
+	CBR_128000 = 128000
+	CBR_256000 = 256000
+
+	DTR_CONTROL_DISABLE   = 0x00
+	DTR_CONTROL_ENABLE    = 0x01
+	DTR_CONTROL_HANDSHAKE = 0x02
+
+	RTS_CONTROL_DISABLE   = 0x00
+	RTS_CONTROL_ENABLE    = 0x01
+	RTS_CONTROL_HANDSHAKE = 0x02
+	RTS_CONTROL_TOGGLE    = 0x03
+
+	NOPARITY    = 0
+	ODDPARITY   = 1
+	EVENPARITY  = 2
+	MARKPARITY  = 3
+	SPACEPARITY = 4
+
+	ONESTOPBIT   = 0
+	ONE5STOPBITS = 1
+	TWOSTOPBITS  = 2
+)
+
+// EscapeCommFunction constants. See https://learn.microsoft.com/en-us/windows/win32/api/winbase/nf-winbase-escapecommfunction.
+const (
+	SETXOFF  = 1
+	SETXON   = 2
+	SETRTS   = 3
+	CLRRTS   = 4
+	SETDTR   = 5
+	CLRDTR   = 6
+	SETBREAK = 8
+	CLRBREAK = 9
+)
+
+// PurgeComm constants. See https://learn.microsoft.com/en-us/windows/win32/api/winbase/nf-winbase-purgecomm.
+const (
+	PURGE_TXABORT = 0x0001
+	PURGE_RXABORT = 0x0002
+	PURGE_TXCLEAR = 0x0004
+	PURGE_RXCLEAR = 0x0008
+)
+
+// SetCommMask constants. See https://learn.microsoft.com/en-us/windows/win32/api/winbase/nf-winbase-setcommmask.
+const (
+	EV_RXCHAR  = 0x0001
+	EV_RXFLAG  = 0x0002
+	EV_TXEMPTY = 0x0004
+	EV_CTS     = 0x0008
+	EV_DSR     = 0x0010
+	EV_RLSD    = 0x0020
+	EV_BREAK   = 0x0040
+	EV_ERR     = 0x0080
+	EV_RING    = 0x0100
+)

windows/types_windows.go

@@ -3380,3 +3380,27 @@ type BLOB struct {
 	Size     uint32
 	BlobData *byte
 }
+
+type ComStat struct {
+	Flags    [4]uint8
+	CBInQue  uint32
+	CBOutQue uint32
+}
+
+type DCB struct {
+	DCBlength  uint32
+	BaudRate   uint32
+	Flags      [4]uint8
+	wReserved  uint16
+	XonLim     uint16
+	XoffLim    uint16
+	ByteSize   uint8
+	Parity     uint8
+	StopBits   uint8
+	XonChar    byte
+	XoffChar   byte
+	ErrorChar  byte
+	EofChar    byte
+	EvtChar    byte
+	wReserved1 uint16
+}