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winpr-comm: completed support of Read*Timeout

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Emmanuel Ledoux 2014-05-28 22:11:19 +02:00 committed by Emmanuel Ledoux
parent 16b6c44ef7
commit 50efce67f5
2 changed files with 67 additions and 66 deletions
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19
channels/serial/client/serial_main.c
View File

@ -163,15 +163,6 @@ static void serial_process_irp_create(SERIAL_DEVICE* serial, IRP* irp)
/* dcb.fBinary = TRUE; */
/* SetCommState(serial->hComm, &dcb); */
// TMP:
COMMTIMEOUTS timeouts;
timeouts.ReadIntervalTimeout = MAXULONG; /* ensures a non blocking state */
timeouts.ReadTotalTimeoutMultiplier = 0;
timeouts.ReadTotalTimeoutConstant = 0;
timeouts.WriteTotalTimeoutMultiplier = 0;
timeouts.WriteTotalTimeoutConstant = 0;
SetCommTimeouts(serial->hComm, &timeouts);
assert(irp->FileId == 0);
irp->FileId = irp->devman->id_sequence++; /* FIXME: why not ((WINPR_COMM*)hComm)->fd? */
@ -238,7 +229,7 @@ static void serial_process_irp_read(SERIAL_DEVICE* serial, IRP* irp)
}
else
{
DEBUG_SVC("read failure to %s, nbRead=%d, last-error: 0x%0.8x", serial->device.name, nbRead, GetLastError());
DEBUG_SVC("read failure to %s, nbRead=%d, last-error: 0x%0.8X", serial->device.name, nbRead, GetLastError());
switch(GetLastError())
{
@ -319,7 +310,7 @@ static void serial_process_irp_write(SERIAL_DEVICE* serial, IRP* irp)
}
else
{
DEBUG_SVC("write failure to %s, nbWritten=%d, last-error: 0x%0.8x", serial->device.name, nbWritten, GetLastError());
DEBUG_SVC("write failure to %s, nbWritten=%d, last-error: 0x%0.8X", serial->device.name, nbWritten, GetLastError());
switch(GetLastError())
{
case ERROR_INVALID_HANDLE:
@ -351,7 +342,7 @@ static void serial_process_irp_write(SERIAL_DEVICE* serial, IRP* irp)
break;
default:
DEBUG_SVC("unexpected last-error: 0x%x", GetLastError());
DEBUG_SVC("unexpected last-error: 0x%X", GetLastError());
irp->IoStatus = STATUS_UNSUCCESSFUL;
break;
}
@ -405,7 +396,7 @@ static void serial_process_irp_device_control(SERIAL_DEVICE* serial, IRP* irp)
}
else
{
DEBUG_SVC("CommDeviceIoControl failure: IoControlCode=[0x%0.8x] %s, last-error: 0x%x",
DEBUG_SVC("CommDeviceIoControl failure: IoControlCode=[0x%0.8x] %s, last-error: 0x%X",
IoControlCode, _comm_serial_ioctl_name(IoControlCode), GetLastError());
// TMP: TODO: Status codes to be reviewed according: http://msdn.microsoft.com/en-us/library/ff547466%28v=vs.85%29.aspx#generic_status_values_for_serial_device_control_requests
@ -445,7 +436,7 @@ static void serial_process_irp_device_control(SERIAL_DEVICE* serial, IRP* irp)
break;
default:
DEBUG_SVC("unexpected last-error: 0x%x", GetLastError());
DEBUG_SVC("unexpected last-error: 0x%X", GetLastError());
irp->IoStatus = STATUS_UNSUCCESSFUL;
break;
}

112
winpr/libwinpr/comm/comm_io.c
View File

@ -56,23 +56,19 @@ BOOL _comm_set_permissive(HANDLE hDevice, BOOL permissive)
}
/* Computes Tmax in deciseconds (m and Tcare in milliseconds) */
static UCHAR _tmax(DWORD N, ULONG m, ULONG Tc)
/* Computes VMIN in deciseconds from Ti in milliseconds */
static UCHAR _vtime(ULONG Ti)
{
/* Tmax = N * m + Tc */
ULONGLONG Tmax = N * m + Tc;
/* FIXME: look for an equivalent math function otherwise let
* do the compiler do the optimization */
if (Tmax == 0)
if (Ti == 0)
return 0;
else if (Tmax < 100)
else if (Ti < 100)
return 1;
else if (Tmax > 25500)
else if (Ti > 25500)
return 255; /* 0xFF */
else
return Tmax/100;
return Ti/100;
}
@ -95,6 +91,8 @@ BOOL CommReadFile(HANDLE hDevice, LPVOID lpBuffer, DWORD nNumberOfBytesToRead,
COMMTIMEOUTS *pTimeouts;
UCHAR vmin = 0;
UCHAR vtime = 0;
ULONGLONG Tmax = 0;
struct timeval tmaxTimeout, *pTmaxTimeout;
struct termios currentTermios;
if (hDevice == INVALID_HANDLE_VALUE)
@ -144,24 +142,19 @@ BOOL CommReadFile(HANDLE hDevice, LPVOID lpBuffer, DWORD nNumberOfBytesToRead,
/* http://msdn.microsoft.com/en-us/library/hh439614%28v=vs.85%29.aspx
* http://msdn.microsoft.com/en-us/library/windows/hardware/hh439614%28v=vs.85%29.aspx
*
* ReadIntervalTimeout | ReadTotalTimeoutMultiplier | ReadTotalTimeoutConstant | VMIN | VTIME | TMAX |
* 0 | 0 | 0 | N | 0 | 0 | Blocks for N bytes available.
* 0< Ti <MAXULONG | 0 | 0 | N | Ti | 0 | Block on first byte, then use Ti between bytes.
* MAXULONG | 0 | 0 | 0 | 0 | 0 | Returns immediately with bytes available (don't block)
* MAXULONG | MAXULONG | 0< Tc <MAXULONG | 0 | Tc | 0 | Blocks on first byte during Tc or returns immediately whith bytes available
* MAXULONG | m | MAXULONG | | Invalid
* 0 | m | 0< Tc <MAXULONG | 0 | Tmax | 0 | Block on first byte during Tmax or returns immediately whith bytes available
* 0< Ti <MAXULONG | m | 0< Tc <MAXULONG | N | Ti | Tmax(1) | Block on first byte, then use Ti between bytes. Tmax is use for the whole system call.
* ReadIntervalTimeout | ReadTotalTimeoutMultiplier | ReadTotalTimeoutConstant | VMIN | VTIME | TMAX |
* 0 | 0 | 0 | N | 0 | 0 | Blocks for N bytes available.
* 0< Ti <MAXULONG | 0 | 0 | N | Ti | 0 | Block on first byte, then use Ti between bytes.
* MAXULONG | 0 | 0 | 0 | 0 | 0 | Returns immediately with bytes available (don't block)
* MAXULONG | MAXULONG | 0< Tc <MAXULONG | N | 0 | Tc | Blocks on first byte during Tc or returns immediately whith bytes available
* MAXULONG | m | MAXULONG | | Invalid
* 0 | m | 0< Tc <MAXULONG | N | 0 | Tmax | Block on first byte during Tmax or returns immediately whith bytes available
* 0< Ti <MAXULONG | m | 0< Tc <MAXULONG | N | Ti | Tmax | Block on first byte, then use Ti between bytes. Tmax is use for the whole system call.
*/
/* Tmax = N * m + Tc */
/* NB: timeouts are in milliseconds, VTIME are in deciseconds and is an unsigned char */
/* NB: 0<N; 0 < m < MAXULONG */
/* NB: timeout are milliseconds, VTIME are deciseconds and is an unsigned char */
/* FIXME: Use a dedicted timer for Tmax(1). VMIN=0 and VTIME=Tmax is rather used instead of VMIN=N and WTIME=Ti.
* TMP: check whether open(pComm->fd, O_NONBLOCK) doesn't conflict with above use cases
*/
/* FIXME: double check whether open(pComm->fd_read_event, O_NONBLOCK) doesn't conflict with above use cases */
pTimeouts = &(pComm->timeouts);
@ -174,44 +167,49 @@ BOOL CommReadFile(HANDLE hDevice, LPVOID lpBuffer, DWORD nNumberOfBytesToRead,
/* VMIN */
if ((pTimeouts->ReadIntervalTimeout < MAXULONG) && (pTimeouts->ReadTotalTimeoutMultiplier == 0) && (pTimeouts->ReadTotalTimeoutConstant == 0))
if ((pTimeouts->ReadIntervalTimeout == MAXULONG) && (pTimeouts->ReadTotalTimeoutMultiplier == 0) && (pTimeouts->ReadTotalTimeoutConstant == 0))
{
/* should only match the two first cases above */
vmin = nNumberOfBytesToRead < 256 ? nNumberOfBytesToRead : 255; /* 0xFF */
vmin = 0;
}
else
{
/* N */
/* vmin = nNumberOfBytesToRead < 256 ? nNumberOfBytesToRead : 255;*/ /* 0xFF */
/* NB: we might wait endlessly with vmin=N, prefer to
* force vmin=1 and return with bytes
* available. FIXME: is a feature disarded here? */
vmin = 1;
}
/* VTIME */
if ((pTimeouts->ReadIntervalTimeout > 0) && (pTimeouts->ReadTotalTimeoutMultiplier == 0) && (pTimeouts->ReadTotalTimeoutConstant == 0))
if ((pTimeouts->ReadIntervalTimeout > 0) && (pTimeouts->ReadIntervalTimeout < MAXULONG))
{
/* Ti */
vtime = _tmax(0, 0, pTimeouts->ReadIntervalTimeout);
vtime = _vtime(pTimeouts->ReadIntervalTimeout);
}
else if ((pTimeouts->ReadIntervalTimeout == MAXULONG) && (pTimeouts->ReadTotalTimeoutMultiplier == MAXULONG) && (pTimeouts->ReadTotalTimeoutConstant < MAXULONG))
/* TMAX */
if ((pTimeouts->ReadIntervalTimeout == MAXULONG) && (pTimeouts->ReadTotalTimeoutMultiplier == MAXULONG))
{
/* Tc */
vtime = _tmax(0, 0, pTimeouts->ReadTotalTimeoutConstant);
Tmax = pTimeouts->ReadTotalTimeoutConstant;
}
else if ((pTimeouts->ReadTotalTimeoutMultiplier > 0) || (pTimeouts->ReadTotalTimeoutConstant > 0)) /* <=> Tmax > 0 */
else
{
/* Tmax and Tmax(1) */
vtime = _tmax(nNumberOfBytesToRead, pTimeouts->ReadTotalTimeoutMultiplier, pTimeouts->ReadTotalTimeoutConstant);
/* Tmax */
Tmax = nNumberOfBytesToRead * pTimeouts->ReadTotalTimeoutMultiplier + pTimeouts->ReadTotalTimeoutConstant;
}
if ((currentTermios.c_cc[VMIN] != vmin) || (currentTermios.c_cc[VTIME] != vtime))
{
currentTermios.c_cc[VMIN] = vmin;
currentTermios.c_cc[VTIME] = vtime;
// TMP:
fprintf(stderr, "MANU: Applying timeout VMIN=%u, VTIME=%u\n", vmin, vtime);
if (tcsetattr(pComm->fd, TCSANOW, &currentTermios) < 0)
{
DEBUG_WARN("CommReadFile failure, could not apply new timeout values: VMIN=%u, VTIME=%u", vmin, vtime);
@ -220,6 +218,18 @@ BOOL CommReadFile(HANDLE hDevice, LPVOID lpBuffer, DWORD nNumberOfBytesToRead,
}
}
pTmaxTimeout = NULL; /* no timeout if Tmax == 0 */
if (Tmax > 0)
{
ZeroMemory(&tmaxTimeout, sizeof(struct timeval));
tmaxTimeout.tv_sec = Tmax / 1000; /* s */
tmaxTimeout.tv_usec = (Tmax % 1000) * 1000; /* us */
pTmaxTimeout = &tmaxTimeout;
}
/* FIXME: had expected eventfd_write() to return EAGAIN when
* there is no eventfd_read() but this not the case. */
/* discard a possible and no more relevant event */
@ -237,7 +247,7 @@ BOOL CommReadFile(HANDLE hDevice, LPVOID lpBuffer, DWORD nNumberOfBytesToRead,
FD_SET(pComm->fd_read_event, &read_set);
FD_SET(pComm->fd_read, &read_set);
nbFds = select(biggestFd+1, &read_set, NULL, NULL, NULL /* TMP: TODO:*/);
nbFds = select(biggestFd+1, &read_set, NULL, NULL, pTmaxTimeout);
if (nbFds < 0)
{
DEBUG_WARN("select() failure, errno=[%d] %s\n", errno, strerror(errno));
@ -343,7 +353,7 @@ BOOL CommWriteFile(HANDLE hDevice, LPCVOID lpBuffer, DWORD nNumberOfBytesToWrite
LPDWORD lpNumberOfBytesWritten, LPOVERLAPPED lpOverlapped)
{
WINPR_COMM* pComm = (WINPR_COMM*) hDevice;
struct timeval timeout, *pTimeout;
struct timeval tmaxTimeout, *pTmaxTimeout;
if (hDevice == INVALID_HANDLE_VALUE)
{
@ -389,15 +399,15 @@ BOOL CommWriteFile(HANDLE hDevice, LPCVOID lpBuffer, DWORD nNumberOfBytesToWrite
* how much time was left. Keep the timeout variable out of
* the while() */
pTimeout = NULL; /* no timeout if Tmax == 0 */
pTmaxTimeout = NULL; /* no timeout if Tmax == 0 */
if (Tmax > 0)
{
ZeroMemory(&timeout, sizeof(struct timeval));
ZeroMemory(&tmaxTimeout, sizeof(struct timeval));
timeout.tv_sec = Tmax / 1000; /* s */
timeout.tv_usec = (Tmax % 1000) * 1000; /* us */
tmaxTimeout.tv_sec = Tmax / 1000; /* s */
tmaxTimeout.tv_usec = (Tmax % 1000) * 1000; /* us */
pTimeout = &timeout;
pTmaxTimeout = &tmaxTimeout;
}
while (*lpNumberOfBytesWritten < nNumberOfBytesToWrite)
@ -419,7 +429,7 @@ BOOL CommWriteFile(HANDLE hDevice, LPCVOID lpBuffer, DWORD nNumberOfBytesToWrite
FD_SET(pComm->fd_write_event, &event_set);
FD_SET(pComm->fd_write, &write_set);
nbFds = select(biggestFd+1, &event_set, &write_set, NULL, pTimeout);
nbFds = select(biggestFd+1, &event_set, &write_set, NULL, pTmaxTimeout);
if (nbFds < 0)
{
DEBUG_WARN("select() failure, errno=[%d] %s\n", errno, strerror(errno));