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ntdll: Implemented IOCTL purge for serial objects.
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parent
bd8db45e44
commit
b83c5ead16
2 changed files with 28 additions and 26 deletions
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@ -848,37 +848,19 @@ BOOL WINAPI EscapeCommFunction(
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* Terminates pending operations and/or discards buffers on a
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* communication resource.
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*
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* PARAMS
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*
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* handle [in] The communication resource to be purged
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* flags [in] Flags for clear pending/buffer on input/output
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*
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* RETURNS
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*
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* True on success and false if the communications handle is bad.
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*/
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BOOL WINAPI PurgeComm(
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HANDLE handle, /* [in] The communication resource to be purged. */
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DWORD flags) /* [in] Flags for clear pending/buffer on input/output. */
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BOOL WINAPI PurgeComm(HANDLE handle, DWORD flags)
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{
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int fd;
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TRACE("handle %p, flags %lx\n", handle, flags);
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fd = get_comm_fd( handle, FILE_READ_DATA );
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if(fd<0) return FALSE;
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/*
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** not exactly sure how these are different
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** Perhaps if we had our own internal queues, one flushes them
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** and the other flushes the kernel's buffers.
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*/
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if(flags&PURGE_TXABORT)
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tcflush(fd,TCOFLUSH);
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if(flags&PURGE_RXABORT)
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tcflush(fd,TCIFLUSH);
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if(flags&PURGE_TXCLEAR)
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tcflush(fd,TCOFLUSH);
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if(flags&PURGE_RXCLEAR)
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tcflush(fd,TCIFLUSH);
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release_comm_fd( handle, fd );
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return 1;
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return DeviceIoControl(handle, IOCTL_SERIAL_PURGE, &flags, sizeof(flags),
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NULL, 0, NULL, NULL);
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}
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/*****************************************************************************
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@ -129,6 +129,20 @@ static const char* iocode2str(DWORD ioc)
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}
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}
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static NTSTATUS purge(int fd, DWORD flags)
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{
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/*
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** not exactly sure how these are different
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** Perhaps if we had our own internal queues, one flushes them
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** and the other flushes the kernel's buffers.
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*/
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if (flags & PURGE_TXABORT) tcflush(fd, TCOFLUSH);
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if (flags & PURGE_RXABORT) tcflush(fd, TCIFLUSH);
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if (flags & PURGE_TXCLEAR) tcflush(fd, TCOFLUSH);
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if (flags & PURGE_RXCLEAR) tcflush(fd, TCIFLUSH);
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return STATUS_SUCCESS;
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}
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/******************************************************************
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* COMM_DeviceIoControl
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*
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@ -156,6 +170,12 @@ NTSTATUS COMM_DeviceIoControl(HANDLE hDevice,
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switch (dwIoControlCode)
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{
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case IOCTL_SERIAL_PURGE:
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if (lpInBuffer && nInBufferSize == sizeof(DWORD))
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status = purge(fd, *(DWORD*)lpInBuffer);
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else
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status = STATUS_INVALID_PARAMETER;
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break;
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case IOCTL_SERIAL_SET_BREAK_OFF:
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#if defined(TIOCSBRK) && defined(TIOCCBRK) /* check if available for compilation */
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if (ioctl(fd, TIOCCBRK, 0) == -1)
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