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ntdll: Generate a single EV_TXEMPTY when the TX buffer turns empty.

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This commit is contained in:
Uwe Bonnes 2011-10-13 11:30:37 +02:00 committed by Alexandre Julliard
parent 876d551911
commit 89c2a4c596
1 changed files with 33 additions and 21 deletions
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54
dlls/ntdll/serial.c
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@ -785,6 +785,7 @@ static NTSTATUS set_XOn(int fd)
typedef struct serial_irq_info
{
int rx , tx, frame, overrun, parity, brk, buf_overrun;
DWORD temt;
}serial_irq_info;
/***********************************************************************
@ -806,7 +807,6 @@ typedef struct async_commio
*/
static NTSTATUS get_irq_info(int fd, serial_irq_info *irq_info)
{
NTSTATUS status = STATUS_NOT_IMPLEMENTED;
#ifdef TIOCGICOUNT
struct serial_icounter_struct einfo;
if (!ioctl(fd, TIOCGICOUNT, &einfo))
@ -818,13 +818,38 @@ static NTSTATUS get_irq_info(int fd, serial_irq_info *irq_info)
irq_info->parity = einfo.parity;
irq_info->brk = einfo.brk;
irq_info->buf_overrun = einfo.buf_overrun;
return STATUS_SUCCESS;
}
TRACE("TIOCGICOUNT err %s\n", strerror(errno));
status = FILE_GetNtStatus();
#endif
else
{
TRACE("TIOCGICOUNT err %s\n", strerror(errno));
memset(irq_info,0, sizeof(serial_irq_info));
return FILE_GetNtStatus();
}
#else
memset(irq_info,0, sizeof(serial_irq_info));
return status;
return STATUS_NOT_IMPLEMENTED;
#endif
irq_info->temt = 0;
/* Generate a single TX_TXEMPTY event when the TX Buffer turns empty*/
#ifdef TIOCSERGETLSR /* prefer to log the state TIOCSERGETLSR */
if (ioctl(fd, TIOCSERGETLSR, &irq_info->temt))
{
TRACE("TIOCSERGETLSR err %s\n", strerror(errno));
return FILE_GetNtStatus();
}
#elif defined(TIOCOUTQ) /* otherwise we log when the out queue gets empty */
if (ioctl(fd, TIOCOUTQ, &irq_info->temt))
{
TRACE("TIOCOUTQ err %s\n", strerror(errno));
return FILE_GetNtStatus();
}
else
{
if (irq_info->temt == 0)
irq_info->temt = 1;
}
#endif
return STATUS_SUCCESS;
}
@ -862,21 +887,8 @@ static DWORD check_events(int fd, DWORD mask,
}
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)
/* TIOCOUTQ only checks for an empty buffer */
#elif defined(TIOCOUTQ)
if (ioctl(fd, TIOCOUTQ, &queue))
WARN("TIOCOUTQ returned error\n");
if (!queue)
#endif
ret |= EV_TXEMPTY;
TRACE("OUTQUEUE %d, Transmitter %sempty\n",
queue, (ret & EV_TXEMPTY) ? "" : "not ");
if (!old->temt && new->temt)
ret |= EV_TXEMPTY;
}
return ret & mask;
}