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Implement WaitCommEvent by polling the appropriate data sources.

This commit is contained in:
Uwe Bonnes 2005-08-03 15:43:17 +00:00 committed by Alexandre Julliard
parent 635135ba3d
commit 867f66ffe8
1 changed files with 211 additions and 81 deletions
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292
dlls/kernel/comm.c
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@ -16,37 +16,6 @@
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* History:
*
* Apr 3, 1999. Lawson Whitney <lawson_whitney@juno.com>
* - Fixed the modem control part of EscapeCommFunction16.
*
* Mar 31, 1999. Ove Kåven <ovek@arcticnet.no>
* - Implemented buffers and EnableCommNotification.
*
* Mar 3, 1999. Ove Kåven <ovek@arcticnet.no>
* - Use port indices instead of unixfds for win16
* - Moved things around (separated win16 and win32 routines)
* - Added some hints on how to implement buffers and EnableCommNotification.
*
* Oktober 98, Rein Klazes [RHK]
* A program that wants to monitor the modem status line (RLSD/DCD) may
* poll the modem status register in the commMask structure. I update the bit
* in GetCommError, waiting for an implementation of communication events.
*
* July 6, 1998. Fixes and comments by Valentijn Sessink
* <vsessink@ic.uva.nl> [V]
*
* August 12, 1997. Take a bash at SetCommEventMask - Lawson Whitney
* <lawson_whitney@juno.com>
*
* May 26, 1997. Fixes and comments by Rick Richardson <rick@dgii.com> [RER]
* - ptr->fd wasn't getting cleared on close.
* - GetCommEventMask() and GetCommError() didn't do much of anything.
* IMHO, they are still wrong, but they at least implement the RXCHAR
* event and return I/O queue sizes, which makes the app I'm interested
* in (analog devices EZKIT DSP development system) work.
*/
#include "config.h"
@ -94,7 +63,6 @@
#include "winbase.h"
#include "winerror.h"
#include "thread.h"
#include "wine/server.h"
#include "wine/unicode.h"
@ -122,18 +90,30 @@ static inline void release_comm_fd( HANDLE handle, int fd )
wine_server_release_fd( handle, fd );
}
/* serial_irq_info
* local structure holding the irq values we need for WaitCommEvent()
*
* Stripped down from struct serial_icounter_struct, which may not be available on some systems
* As the modem line interrupts (cts, dsr, rng, dcd) only get updated with TIOCMIWAIT active,
* no need to carry them in the internal structure
*
*/
typedef struct serial_irq_info
{
int rx , tx, frame, overrun, parity, brk, buf_overrun;
}serial_irq_info;
/***********************************************************************
* Asynchronous I/O for asynchronous wait requests *
* Data needed by the thread polling for the changing CommEvent
*/
typedef struct async_commio
{
HANDLE handle;
PIO_APC_ROUTINE apc_internal;
int type;
char* buffer;
int fd;
HANDLE hEvent;
DWORD evtmask;
DWORD mstat;
serial_irq_info irq_info;
} async_commio;
/***********************************************************************/
@ -142,6 +122,29 @@ typedef struct async_commio
#define TIOCINQ FIONREAD
#endif
/***********************************************************************
* Get extended interrupt count info, needed for WaitCommEvent
*/
static int COMM_GetEInfo(int fd, serial_irq_info *irq_info)
{
#ifdef TIOCGICOUNT
struct serial_icounter_struct einfo;
if (!ioctl(fd,TIOCGICOUNT, &einfo))
{
irq_info->rx = einfo.rx;
irq_info->tx = einfo.tx;
irq_info->frame = einfo.frame;
irq_info->overrun = einfo.overrun;
irq_info->parity = einfo.parity;
irq_info->brk = einfo.brk;
irq_info->buf_overrun = einfo.buf_overrun;
return 0;
}
#endif
memset(irq_info,0, sizeof(serial_irq_info));
return -1;
}
static int COMM_WhackModem(int fd, unsigned int andy, unsigned int orrie)
{
#ifdef TIOCMGET
@ -1907,33 +1910,103 @@ BOOL WINAPI GetCommModemStatus(
#endif
}
static DWORD WINAPI Comm_CheckEvents(int fd, DWORD mask, serial_irq_info *new, serial_irq_info *old, DWORD new_mstat, DWORD old_mstat)
{
DWORD ret = 0, queue;
TRACE("mask 0x%08lx\n", mask);
TRACE("old->rx 0x%08x vs. new->rx 0x%08x \n", old->rx, new->rx);
TRACE("old->tx 0x%08x vs. new->tx 0x%08x \n", old->tx, new->tx);
TRACE("old->frame 0x%08x vs. new->frame 0x%08x \n", old->frame, new->frame);
TRACE("old->overrun 0x%08x vs. new->overrun 0x%08x \n", old->overrun, new->overrun);
TRACE("old->parity 0x%08x vs. new->parity 0x%08x \n", old->parity, new->parity);
TRACE("old->brk 0x%08x vs. new->brk 0x%08x \n", old->brk, new->brk);
TRACE("old->buf_overrun 0x%08x vs. new->buf_overrun 0x%08x \n", old->buf_overrun, new->buf_overrun);
ret |= ((mask & EV_BREAK) && ( old->brk != new->brk))?EV_BREAK:0;
ret |= ((mask & EV_CTS ) && ((old_mstat&MS_CTS_ON )!=(new_mstat&MS_CTS_ON )))?EV_CTS :0;
ret |= ((mask & EV_DSR ) && ((old_mstat&MS_DSR_ON )!=(new_mstat&MS_DSR_ON )))?EV_DSR :0;
ret |= ((mask & EV_RING ) && ((old_mstat&MS_RING_ON)!=(new_mstat&MS_RING_ON)))?EV_RING :0;
ret |= ((mask & EV_RLSD ) && ((old_mstat&MS_RLSD_ON)!=(new_mstat&MS_RLSD_ON)))?EV_RLSD :0;
ret |= ((mask & EV_ERR ) && (( old->frame != new->frame) ||(old->overrun != new->overrun)
|| (old->parity != new->parity)) )?EV_ERR :0;
if (mask & EV_RXCHAR)
{
queue = 0;
#ifdef TIOCINQ
if(ioctl(fd, TIOCINQ, &queue))
WARN("TIOCINQ returned error\n");
#endif
if (queue)
ret |= EV_RXCHAR;
}
if (mask & EV_TXEMPTY)
{
queue = 0;
/* We really want to know when all characters have gone out of the transmitter */
#if defined(TIOCSERGETLSR)
if(ioctl(fd, TIOCSERGETLSR, &queue))
WARN("TIOCSERGETLSR returned error\n");
if (queue)
/* TIOCINQ only checks for an empty buffer */
#elif def(TIOCINQ)
if(ioctl(fd, TIOCOUTQ, &queue))
WARN("TIOCOUTQ returned error\n");
if (!queue)
#endif
ret |= EV_TXEMPTY;
}
TRACE("OUTQUEUE %ld, Transmitter %sempty\n", queue, (ret & EV_TXEMPTY)?"":"not ");
return ret;
}
/***********************************************************************
* COMM_WaitCommEventService (INTERNAL)
*
* This function is called while the client is waiting on the
* server, so we can't make any server calls here.
* We need to poll for what is interesting
* TIOCMIWAIT only checks modem status line and may not be aborted by a changing mask
*
*/
static void WINAPI COMM_WaitCommEventService(void* ovp, IO_STATUS_BLOCK* iosb, ULONG status)
static DWORD WINAPI COMM_WaitCommEventService(LPVOID arg)
{
async_commio *commio = (async_commio*) ovp;
async_commio *commio = (async_commio*) arg;
int waitmask = 0;
int rc, fd, abort;
serial_irq_info new_irq_info;
DWORD new_mstat, new_evtmask;
TRACE("iosb %p\n", iosb);
fd=get_comm_fd( commio->handle, GENERIC_READ );
switch (status)
TRACE("handle %p fd 0x%08x, mask 0x%08lx buffer %p event %p irq_info %p waitmask 0x%08x\n",
commio->handle, fd, commio->evtmask, commio->buffer, commio->hEvent, &commio->irq_info, waitmask);
do
{
case STATUS_ALERTED: /* got some new stuff */
/* FIXME: detect other events */
*commio->buffer = EV_RXCHAR;
iosb->u.Status = STATUS_SUCCESS;
break;
default:
iosb->u.Status = status;
break;
}
wine_server_release_fd( commio->handle, commio->fd );
if ( ((LPOVERLAPPED)iosb)->hEvent != INVALID_HANDLE_VALUE )
NtSetEvent( ((LPOVERLAPPED)iosb)->hEvent, NULL );
/*
* TIOCMIWAIT is not adequate
*
* FIXME:
* We don't handle the EV_RXFLAG (the eventchar)
*/
Sleep(1);
rc= COMM_GetEInfo(fd,&new_irq_info);
if (rc)
TRACE("TIOCGICOUNT err %s\n", strerror(errno));
rc = GetCommModemStatus(commio->handle, &new_mstat);
if (!rc)
TRACE("GetCommModemStatus failed\n");
rc = Comm_CheckEvents(fd, commio->evtmask,&new_irq_info,&commio->irq_info, new_mstat, commio->mstat);
GetCommMask(commio->handle, &new_evtmask);
abort = (commio->evtmask != new_evtmask);
TRACE("resulting Eventmask 0x%08x\n", rc);
} while (!rc && ! abort);
if (abort) rc = 0;
release_comm_fd( commio->handle, fd );
*commio->buffer = rc;
if (commio->hEvent != INVALID_HANDLE_VALUE )
NtSetEvent( commio->hEvent, NULL );
HeapFree(GetProcessHeap(), 0, commio );
return 0;
}
@ -1949,7 +2022,8 @@ static BOOL COMM_WaitCommEvent(
{
int fd;
async_commio* commio;
NTSTATUS status;
DWORD result_mask;
BOOL res;
if (!lpOverlapped)
{
@ -1971,32 +2045,70 @@ static BOOL COMM_WaitCommEvent(
}
commio->handle = hFile;
commio->type = ASYNC_TYPE_WAIT;
commio->apc_internal = COMM_WaitCommEventService;
commio->buffer = (char *)lpdwEvents;
commio->fd = fd; /* FIXME */
commio->hEvent = lpOverlapped->hEvent;
GetCommMask(hFile, &commio->evtmask);
lpOverlapped->InternalHigh = 0;
lpOverlapped->u.s.Offset = 0;
lpOverlapped->u.s.OffsetHigh = 0;
SERVER_START_REQ( register_async )
/* We may never return, if some capabilities miss
* Return error in that case
*/
#if !defined(TIOCINQ)
if(commio->evtmask & EV_RXCHAR)
goto error;
#endif
#if !(defined(TIOCSERGETLSR) && defined(TIOCSER_TEMT)) || !defined(TIOCINQ)
if(commio->evtmask & EV_TXEMPTY)
goto error;
#endif
#if !defined(TIOCMGET)
if(commio->evtmask & (EV_CTS | EV_DSR| EV_RING| EV_RLSD))
goto error;
#endif
#if !defined(TIOCM_CTS)
if(commio->evtmask & EV_CTS)
goto error;
#endif
#if !defined(TIOCM_DSR)
if(commio->evtmask & EV_DSR)
goto error;
#endif
#if !defined(TIOCM_RNG)
if(commio->evtmask & EV_RING)
goto error;
#endif
#if !defined(TIOCM_CAR)
if(commio->evtmask & EV_RLSD)
goto error;
#endif
if(commio->evtmask & EV_RXFLAG)
FIXME("EV_RXFLAG not handled\n");
COMM_GetEInfo(fd,&commio->irq_info);
GetCommModemStatus(hFile, &commio->mstat);
/* We might have received something or the TX bufffer is delivered*/
result_mask = Comm_CheckEvents( fd, commio->evtmask, &commio->irq_info, &commio->irq_info,commio->mstat,commio->mstat);
if (result_mask)
{
req->handle = hFile;
req->io_apc = COMM_WaitCommEventService;
req->io_user = commio;
req->io_sb = (IO_STATUS_BLOCK*)lpOverlapped;
req->count = 0;
status = wine_server_call( req );
TRACE("Event already met\n");
*lpdwEvents = result_mask;
release_comm_fd( commio->handle, fd );
HeapFree(GetProcessHeap(), 0, commio );
res = TRUE;
}
SERVER_END_REQ;
if ( status ) SetLastError( RtlNtStatusToDosError(status) );
else NtCurrentTeb()->num_async_io++;
else
{
CreateThread(NULL, 0, COMM_WaitCommEventService, (LPVOID)commio, 0, NULL);
SetLastError(ERROR_IO_PENDING);
res = FALSE;
}
return res;
#if !defined(TIOCINQ) || (!(defined(TIOCSERGETLSR) && defined(TIOCSER_TEMT)) && !defined(TIOCINQ)) || !defined(TIOCMGET) || !defined(TIOCM_CTS) ||!defined(TIOCM_DSR) || !defined(TIOCM_RNG) || !defined(TIOCM_CAR)
error:
FIXME("Returning error because of missing capabilities\n");
HeapFree(GetProcessHeap(), 0, commio );
SetLastError(ERROR_INVALID_PARAMETER);
return FALSE;
#endif
}
/***********************************************************************
* WaitCommEvent (KERNEL32.@)
*
@ -2020,7 +2132,8 @@ BOOL WINAPI WaitCommEvent(
LPOVERLAPPED lpOverlapped) /* [in/out] for Asynchronous waiting */
{
OVERLAPPED ov;
int ret;
int ret = 0;
DWORD res, err;
TRACE("(%p %p %p )\n",hFile, lpdwEvents,lpOverlapped);
@ -2030,10 +2143,27 @@ BOOL WINAPI WaitCommEvent(
/* if there is no overlapped structure, create our own */
ov.hEvent = CreateEventW(NULL,FALSE,FALSE,NULL);
COMM_WaitCommEvent(hFile, lpdwEvents, &ov);
/* wait for the overlapped to complete */
ret = GetOverlappedResult(hFile, &ov, NULL, TRUE);
res = COMM_WaitCommEvent(hFile, lpdwEvents, &ov);
err = GetLastError();
if (!res)
{
if (err == ERROR_IO_PENDING)
{
do
{
res = WaitForSingleObjectEx(ov.hEvent, INFINITE, FALSE);
} while (res != WAIT_OBJECT_0);
TRACE("Event met\n:");
ret = TRUE;
}
else
{
FIXME("Unknown error 0x%08lx\n", err);
ret = FALSE;
}
}
else
ret = TRUE;
CloseHandle(ov.hEvent);
return ret;