Hello! I've already post the
bug(http://bugs.winehq.org/show_bug.cgi?id=19713) on this subject, but i
need more help. So I've decided to write here.
There is a problem in wine. When I use asynchronous serial port read,
data never comes. Event, caused by select comes. But operation status
stays pending, and i can't do anything to this serial port anymore. In
windows it never get pending, and port can be accessed just after data
arrival. Seems to be wineserver problem, but i don't know, where to look
at. What code respond for asynchronous serial port in wineserver?
Alexander.
P.S. Test program attached.
#include <windows.h>
#include <stdio.h>
int main()
{
HANDLE hSerial = CreateFile("\\\\.\\COM1", GENERIC_READ | GENERIC_WRITE, 0, 0, OPEN_EXISTING, FILE_FLAG_OVERLAPPED, 0);
DCB dcbSerialParams = {0};
dcbSerialParams.DCBlength=sizeof(dcbSerialParams);
dcbSerialParams.BaudRate=CBR_9600;
dcbSerialParams.ByteSize=8;
dcbSerialParams.StopBits=ONESTOPBIT;
dcbSerialParams.Parity=NOPARITY;
dcbSerialParams.fBinary = 1;
dcbSerialParams.fDtrControl = DTR_CONTROL_DISABLE;
dcbSerialParams.fRtsControl = RTS_CONTROL_DISABLE;
SetCommState(hSerial, &dcbSerialParams);
COMMTIMEOUTS timeouts={0};
timeouts.ReadIntervalTimeout=250;
timeouts.ReadTotalTimeoutConstant=250;
timeouts.ReadTotalTimeoutMultiplier=250;
timeouts.WriteTotalTimeoutMultiplier = timeouts.WriteTotalTimeoutConstant = 250;
SetCommTimeouts(hSerial, &timeouts);
SetupComm(hSerial, 1024, 1024);
PurgeComm(hSerial, PURGE_TXCLEAR | PURGE_RXCLEAR | PURGE_TXABORT | PURGE_RXABORT);
SetCommMask(hSerial, EV_RXCHAR);
int iters = 0;
DWORD dwResult = 0;
DWORD dwReadResult = 0;
DWORD dwOvRes = 0;
DWORD bOvResult = 0;
char buffer[2048];
DWORD dwRead = 0;
DWORD evtMask, dwError;
DWORD dwTest;
OVERLAPPED ovOverlapped;
ovOverlapped.Offset = ovOverlapped.OffsetHigh = 0;
ovOverlapped.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
BOOL bRes = WaitCommEvent(hSerial, &evtMask, &ovOverlapped);
if(!bRes)
{
dwError=GetLastError();
if (dwError == ERROR_IO_PENDING)
{
printf("dwError = ERROR_IO_PENDING\n");
printf("*** All preparations is done. Now we are gonna wait for event.\n");
dwResult = WaitForSingleObject(ovOverlapped.hEvent, INFINITE);
do
{
bOvResult = GetOverlappedResult(hSerial, &ovOverlapped, &dwOvRes, FALSE);
dwError=GetLastError();
printf("ovOverlapped.Internal = %lu\n", ovOverlapped.Internal);
printf("dwError = %d\n", dwError);
printf("bOvResult = %d\n", bOvResult);
if (bOvResult) break;
if(ovOverlapped.Internal==259)
printf("*** ovOverlapped.Internal==259. That means, that event is in progress. It is a bug. Because in windows it will never reach this point. It seems that data get stuck somewhere, but event is sent. If we try to read data, we'll get nothing.\n");
Sleep(500);
} while (dwError == ERROR_IO_INCOMPLETE);
if (bOvResult)
{
printf("*** All is done good. It means, that we are in Windows, or Wine is fixed(hope so).\n");
printf("OK.\n");
if (evtMask & EV_RXCHAR)
{
printf("EV_RXCHAR.\n");
}
} else
{
printf("BAD.\n");
}
}
}
return 0;
}
