/* $Id: serialport-os2.cpp 82968 2020-02-04 10:35:17Z vboxsync $ */ /** @file * IPRT - Serial Port API, OS/2 Implementation. */ /* * Copyright (C) 2017-2020 Oracle Corporation * * This file is part of VirtualBox Open Source Edition (OSE), as * available from http://www.virtualbox.org. This file is free software; * you can redistribute it and/or modify it under the terms of the GNU * General Public License (GPL) as published by the Free Software * Foundation, in version 2 as it comes in the "COPYING" file of the * VirtualBox OSE distribution. VirtualBox OSE is distributed in the * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind. * * The contents of this file may alternatively be used under the terms * of the Common Development and Distribution License Version 1.0 * (CDDL) only, as it comes in the "COPYING.CDDL" file of the * VirtualBox OSE distribution, in which case the provisions of the * CDDL are applicable instead of those of the GPL. * * You may elect to license modified versions of this file under the * terms and conditions of either the GPL or the CDDL or both. */ /********************************************************************************************************************************* * Header Files * *********************************************************************************************************************************/ #define INCL_BASE #define INCL_DOSFILEMGR #define INCL_ERRORS #define INCL_DOS #define INCL_DOSDEVIOCTL #define INCL_DOSDEVICES #include #undef RT_MAX #include #include "internal/iprt.h" #include #include #include #include #include #include #include #include "internal/magics.h" /********************************************************************************************************************************* * Structures and Typedefs * *********************************************************************************************************************************/ /** * Returned data structure for ASYNC_EXTGETBAUDRATE. */ typedef struct OS2EXTGETBAUDRATEDATA { /** Current bit rate. */ ULONG uBitRateCur; /** Fraction of the current bit rate. */ BYTE bBitRateCurFrac; /** Minimum supported bit rate. */ ULONG uBitRateMin; /** Fraction of the minimum bit rate. */ BYTE bBitRateCurMin; /** Maximum supported bit rate. */ ULONG uBitRateMax; /** Fraction of the maximum bit rate. */ BYTE bBitRateCurMax; } OS2EXTGETBAUDRATEDATA; /** Pointer to the get extended baud rate data packet. */ typedef OS2EXTGETBAUDRATEDATA *POS2EXTGETBAUDRATEDATA; /** * Data packet for the ASYNC_EXTSETBAUDRATE ioctl. */ typedef struct OS2EXTSETBAUDRATEDATA { /** Current bit rate. */ ULONG uBitRate; /** Fraction of the current bit rate. */ BYTE bBitRateFrac; } OS2EXTSETBAUDRATEDATA; /** Pointer to the set extended baud rate data packet. */ typedef OS2EXTSETBAUDRATEDATA *POS2EXTSETBAUDRATEDATA; /** * Data packet for the ASYNC_GETLINECTRL ioctl. */ typedef struct OS2GETLINECTRLDATA { /** Returns the current amount of data bits in a symbol used for the communication. */ BYTE bDataBits; /** Current parity setting. */ BYTE bParity; /** Current number of stop bits. */ BYTE bStopBits; /** Flag whether a break condition is currently transmitted on the line. */ BYTE bTxBrk; } OS2GETLINECTRLDATA; /** Pointer to the get line control data packet. */ typedef OS2GETLINECTRLDATA *POS2GETLINECTRLDATA; /** * Data packet for the ASYNC_SETLINECTRL ioctl. */ typedef struct OS2SETLINECTRLDATA { /** Returns the current amount of data bits in a symbol used for the communication. */ BYTE bDataBits; /** Current parity setting. */ BYTE bParity; /** Current number of stop bits. */ BYTE bStopBits; } OS2SETLINECTRLDATA; /** Pointer to the get line control data packet. */ typedef OS2SETLINECTRLDATA *POS2SETLINECTRLDATA; /** * Internal serial port state. */ typedef struct RTSERIALPORTINTERNAL { /** Magic value (RTSERIALPORT_MAGIC). */ uint32_t u32Magic; /** Flags given while opening the serial port. */ uint32_t fOpenFlags; /** The file descriptor of the serial port. */ HFILE hDev; /** Flag whether blocking mode is currently enabled. */ bool fBlocking; /** Flag whether RTSerialPortEvtPoll() was interrupted by RTSerialPortEvtPollInterrupt(). */ volatile bool fInterrupt; } RTSERIALPORTINTERNAL; /** Pointer to the internal serial port state. */ typedef RTSERIALPORTINTERNAL *PRTSERIALPORTINTERNAL; /********************************************************************************************************************************* * Defined Constants And Macros * *********************************************************************************************************************************/ /** Indicator whether the CTS input is set/clear. */ #define OS2_GET_MODEM_INPUT_CTS RT_BIT(4) /** Indicator whether the DSR input is set/clear. */ #define OS2_GET_MODEM_INPUT_DSR RT_BIT(5) /** Indicator whether the RI input is set/clear. */ #define OS2_GET_MODEM_INPUT_RI RT_BIT(6) /** Indicator whether the DCD input is set/clear. */ #define OS2_GET_MODEM_INPUT_DCD RT_BIT(7) /** There is something to read on the serial port. */ #define OS2_GET_COMM_EVT_RX RT_BIT(0) /** A receive timeout interrupt was generated on the serial port during a read request. */ #define OS2_GET_COMM_EVT_RTI RT_BIT(1) /** The transmit queue for the serial port is empty. */ #define OS2_GET_COMM_EVT_TX_EMPTY RT_BIT(2) /** The CTS signal changes state. */ #define OS2_GET_COMM_EVT_CTS_CHG RT_BIT(3) /** The DSR signal changes state. */ #define OS2_GET_COMM_EVT_DSR_CHG RT_BIT(4) /** The DCD signal changes state. */ #define OS2_GET_COMM_EVT_DCD_CHG RT_BIT(5) /** A break condition was detected on the serial port. */ #define OS2_GET_COMM_EVT_BRK RT_BIT(6) /** A parity, framing or receive hardware overrun error occurred. */ #define OS2_GET_COMM_EVT_COMM_ERR RT_BIT(7) /** Trailing edge ring indicator was detected. */ #define OS2_GET_COMM_EVT_RI_TRAIL_EDGE RT_BIT(8) /********************************************************************************************************************************* * Global variables * *********************************************************************************************************************************/ /** OS/2 parity value to IPRT parity enum. */ static RTSERIALPORTPARITY s_aParityConvTbl[] = { RTSERIALPORTPARITY_NONE, RTSERIALPORTPARITY_ODD, RTSERIALPORTPARITY_EVEN, RTSERIALPORTPARITY_MARK, RTSERIALPORTPARITY_SPACE }; /** OS/2 data bits value to IPRT data bits enum. */ static RTSERIALPORTDATABITS s_aDataBitsConvTbl[] = { RTSERIALPORTDATABITS_INVALID, RTSERIALPORTDATABITS_INVALID, RTSERIALPORTDATABITS_INVALID, RTSERIALPORTDATABITS_INVALID, RTSERIALPORTDATABITS_INVALID, RTSERIALPORTDATABITS_5BITS, RTSERIALPORTDATABITS_6BITS, RTSERIALPORTDATABITS_7BITS, RTSERIALPORTDATABITS_8BITS }; /** OS/2 stop bits value to IPRT stop bits enum. */ static RTSERIALPORTSTOPBITS s_aStopBitsConvTbl[] = { RTSERIALPORTSTOPBITS_ONE, RTSERIALPORTSTOPBITS_ONEPOINTFIVE, RTSERIALPORTSTOPBITS_TWO }; /********************************************************************************************************************************* * Internal Functions * *********************************************************************************************************************************/ /** * The slow path of rtSerialPortSwitchBlockingMode that does the actual switching. * * @returns IPRT status code. * @param pThis The internal serial port instance data. * @param fBlocking The desired mode of operation. * @remarks Do not call directly. * * @note Affects only read behavior. */ static int rtSerialPortSwitchBlockingModeSlow(PRTSERIALPORTINTERNAL pThis, bool fBlocking) { DCBINFO DcbInfo; ULONG cbDcbInfo = sizeof(DcbInfo); ULONG rcOs2 = DosDevIOCtl(pThis->hDev, IOCTL_ASYNC, ASYNC_GETDCBINFO, NULL, 0, NULL, &DcbInfo, cbDcbInfo, &cbDcbInfo); if (!rcOs2) { DcbInfo.fbTimeout &= ~0x06; DcbInfo.fbTimeout |= fBlocking ? 0x04 : 0x06; rcOs2 = DosDevIOCtl(pThis->hDev, IOCTL_ASYNC, ASYNC_SETDCBINFO, &DcbInfo, cbDcbInfo, &cbDcbInfo, NULL, 0, NULL); if (rcOs2) return RTErrConvertFromOS2(rcOs2); } else return RTErrConvertFromOS2(rcOs2); pThis->fBlocking = fBlocking; return VINF_SUCCESS; } /** * Switches the serial port to the desired blocking mode if necessary. * * @returns IPRT status code. * @param pThis The internal serial port instance data. * @param fBlocking The desired mode of operation. * * @note Affects only read behavior. */ DECLINLINE(int) rtSerialPortSwitchBlockingMode(PRTSERIALPORTINTERNAL pThis, bool fBlocking) { if (pThis->fBlocking != fBlocking) return rtSerialPortSwitchBlockingModeSlow(pThis, fBlocking); return VINF_SUCCESS; } RTDECL(int) RTSerialPortOpen(PRTSERIALPORT phSerialPort, const char *pszPortAddress, uint32_t fFlags) { AssertPtrReturn(phSerialPort, VERR_INVALID_POINTER); AssertReturn(VALID_PTR(pszPortAddress) && *pszPortAddress != '\0', VERR_INVALID_PARAMETER); AssertReturn(!(fFlags & ~RTSERIALPORT_OPEN_F_VALID_MASK), VERR_INVALID_PARAMETER); AssertReturn((fFlags & RTSERIALPORT_OPEN_F_READ) || (fFlags & RTSERIALPORT_OPEN_F_WRITE), VERR_INVALID_PARAMETER); int rc = VINF_SUCCESS; PRTSERIALPORTINTERNAL pThis = (PRTSERIALPORTINTERNAL)RTMemAllocZ(sizeof(*pThis)); if (pThis) { ULONG fOpenMode = OPEN_SHARE_DENYREADWRITE | OPEN_FLAGS_SEQUENTIAL | OPEN_FLAGS_NOINHERIT | OPEN_FLAGS_FAIL_ON_ERROR; if ((fFlags & RTSERIALPORT_OPEN_F_READ) && !(fFlags & RTSERIALPORT_OPEN_F_WRITE)) fOpenMode |= OPEN_ACCESS_READONLY; else if (!(fFlags & RTSERIALPORT_OPEN_F_READ) && (fFlags & RTSERIALPORT_OPEN_F_WRITE)) fOpenMode |= OPEN_ACCESS_WRITEONLY; else fOpenMode |= OPEN_ACCESS_READWRITE; pThis->u32Magic = RTSERIALPORT_MAGIC; pThis->fOpenFlags = fFlags; pThis->fInterrupt = false; pThis->fBlocking = true; ULONG uAction = 0; ULONG rcOs2 = DosOpen((const UCHAR *)pszPortAddress, &pThis->hDev, &uAction, 0, FILE_NORMAL, FILE_OPEN, fOpenMode, NULL); if (!rcOs2) { /* Switch to a known read blocking mode. */ rc = rtSerialPortSwitchBlockingMode(pThis, false); if (RT_SUCCESS(rc)) { *phSerialPort = pThis; return VINF_SUCCESS; } DosClose(pThis->hDev); } else rc = RTErrConvertFromOS2(rcOs2); RTMemFree(pThis); } else rc = VERR_NO_MEMORY; return rc; } RTDECL(int) RTSerialPortClose(RTSERIALPORT hSerialPort) { PRTSERIALPORTINTERNAL pThis = hSerialPort; if (pThis == NIL_RTSERIALPORT) return VINF_SUCCESS; AssertPtrReturn(pThis, VERR_INVALID_PARAMETER); AssertReturn(pThis->u32Magic == RTSERIALPORT_MAGIC, VERR_INVALID_HANDLE); /* * Do the cleanup. */ AssertReturn(ASMAtomicCmpXchgU32(&pThis->u32Magic, RTSERIALPORT_MAGIC_DEAD, RTSERIALPORT_MAGIC), VERR_INVALID_HANDLE); DosClose(pThis->hDev); RTMemFree(pThis); return VINF_SUCCESS; } RTDECL(RTHCINTPTR) RTSerialPortToNative(RTSERIALPORT hSerialPort) { PRTSERIALPORTINTERNAL pThis = hSerialPort; AssertPtrReturn(pThis, -1); AssertReturn(pThis->u32Magic == RTSERIALPORT_MAGIC, -1); return pThis->hDev; } RTDECL(int) RTSerialPortRead(RTSERIALPORT hSerialPort, void *pvBuf, size_t cbToRead, size_t *pcbRead) { PRTSERIALPORTINTERNAL pThis = hSerialPort; AssertPtrReturn(pThis, VERR_INVALID_PARAMETER); AssertReturn(pThis->u32Magic == RTSERIALPORT_MAGIC, VERR_INVALID_HANDLE); AssertPtrReturn(pvBuf, VERR_INVALID_POINTER); AssertReturn(cbToRead > 0, VERR_INVALID_PARAMETER); int rc = rtSerialPortSwitchBlockingMode(pThis, true); if (RT_SUCCESS(rc)) { /* * Attempt read. */ ULONG cbRead = 0; ULONG rcOs2 = DosRead(pThis->hDev, pvBuf, cbToRead, &cbRead); if (!rcOs2) { if (pcbRead) /* caller can handle partial read. */ *pcbRead = cbRead; else { /* Caller expects all to be read. */ while (cbToRead > cbRead) { ULONG cbReadPart = 0; rcOs2 = DosRead(pThis->hDev, (uint8_t *)pvBuf + cbRead, cbToRead - cbRead, &cbReadPart); if (rcOs2) return RTErrConvertFromOS2(rcOs2); cbRead += cbReadPart; } } } else rc = RTErrConvertFromOS2(rcOs2); } return rc; } RTDECL(int) RTSerialPortReadNB(RTSERIALPORT hSerialPort, void *pvBuf, size_t cbToRead, size_t *pcbRead) { PRTSERIALPORTINTERNAL pThis = hSerialPort; AssertPtrReturn(pThis, VERR_INVALID_PARAMETER); AssertReturn(pThis->u32Magic == RTSERIALPORT_MAGIC, VERR_INVALID_HANDLE); AssertPtrReturn(pvBuf, VERR_INVALID_POINTER); AssertReturn(cbToRead > 0, VERR_INVALID_PARAMETER); AssertPtrReturn(pcbRead, VERR_INVALID_POINTER); *pcbRead = 0; int rc = rtSerialPortSwitchBlockingMode(pThis, false); if (RT_SUCCESS(rc)) { ULONG cbThisRead = 0; ULONG rcOs2 = DosRead(pThis->hDev, pvBuf, cbToRead, &cbThisRead); if (!rcOs2) { *pcbRead = cbThisRead; if (cbThisRead == 0) rc = VINF_TRY_AGAIN; } else rc = RTErrConvertFromOS2(rcOs2); } return rc; } RTDECL(int) RTSerialPortWrite(RTSERIALPORT hSerialPort, const void *pvBuf, size_t cbToWrite, size_t *pcbWritten) { PRTSERIALPORTINTERNAL pThis = hSerialPort; AssertPtrReturn(pThis, VERR_INVALID_PARAMETER); AssertReturn(pThis->u32Magic == RTSERIALPORT_MAGIC, VERR_INVALID_HANDLE); AssertPtrReturn(pvBuf, VERR_INVALID_POINTER); AssertReturn(cbToWrite > 0, VERR_INVALID_PARAMETER); /* * Attempt write. */ int rc = VINF_SUCCESS; ULONG cbThisWritten = 0; ULONG rcOs2 = DosWrite(pThis->hDev, pvBuf, cbToWrite, &cbThisWritten); if (!rcOs2) { if (pcbWritten) /* caller can handle partial write. */ *pcbWritten = cbThisWritten; else { /** @todo Wait for TX empty and loop. */ rc = VERR_NOT_SUPPORTED; } } else rc = RTErrConvertFromOS2(rcOs2); return rc; } RTDECL(int) RTSerialPortWriteNB(RTSERIALPORT hSerialPort, const void *pvBuf, size_t cbToWrite, size_t *pcbWritten) { PRTSERIALPORTINTERNAL pThis = hSerialPort; AssertPtrReturn(pThis, VERR_INVALID_PARAMETER); AssertReturn(pThis->u32Magic == RTSERIALPORT_MAGIC, VERR_INVALID_HANDLE); AssertPtrReturn(pvBuf, VERR_INVALID_POINTER); AssertReturn(cbToWrite > 0, VERR_INVALID_PARAMETER); AssertPtrReturn(pcbWritten, VERR_INVALID_POINTER); *pcbWritten = 0; int rc = VINF_SUCCESS; ULONG cbThisWritten = 0; ULONG rcOs2 = DosWrite(pThis->hDev, pvBuf, cbToWrite, &cbThisWritten); if (!rcOs2) { *pcbWritten = cbThisWritten; if (!cbThisWritten) rc = VINF_TRY_AGAIN; } else rc = RTErrConvertFromOS2(rcOs2); return rc; } RTDECL(int) RTSerialPortCfgQueryCurrent(RTSERIALPORT hSerialPort, PRTSERIALPORTCFG pCfg) { PRTSERIALPORTINTERNAL pThis = hSerialPort; AssertPtrReturn(pThis, VERR_INVALID_PARAMETER); AssertReturn(pThis->u32Magic == RTSERIALPORT_MAGIC, VERR_INVALID_HANDLE); int rc = VINF_SUCCESS; OS2EXTGETBAUDRATEDATA ExtBaudRate; ULONG cbExtBaudRate = sizeof(ExtBaudRate); ULONG rcOs2 = DosDevIOCtl(pThis->hDev, IOCTL_ASYNC, ASYNC_EXTGETBAUDRATE, NULL, 0, NULL, &ExtBaudRate, cbExtBaudRate, &cbExtBaudRate); if (!rcOs2) { OS2GETLINECTRLDATA LineCtrl; ULONG cbLineCtrl = sizeof(LineCtrl); rcOs2 = DosDevIOCtl(pThis->hDev, IOCTL_ASYNC, ASYNC_GETLINECTRL, NULL, 0, NULL, &LineCtrl, cbLineCtrl, &cbLineCtrl); if (!rcOs2) { pCfg->uBaudRate = ExtBaudRate.uBitRateCur; if (LineCtrl.bParity < RT_ELEMENTS(s_aParityConvTbl)) pCfg->enmParity = s_aParityConvTbl[LineCtrl.bParity]; else rc = VERR_IPE_UNEXPECTED_STATUS; if ( RT_SUCCESS(rc) && LineCtrl.bDataBits < RT_ELEMENTS(s_aDataBitsConvTbl) && s_aDataBitsConvTbl[LineCtrl.bDataBits] != RTSERIALPORTDATABITS_INVALID) pCfg->enmDataBitCount = s_aDataBitsConvTbl[LineCtrl.bDataBits]; else rc = VERR_IPE_UNEXPECTED_STATUS; if ( RT_SUCCESS(rc) && LineCtrl.bStopBits < RT_ELEMENTS(s_aStopBitsConvTbl)) pCfg->enmStopBitCount = s_aStopBitsConvTbl[LineCtrl.bStopBits]; else rc = VERR_IPE_UNEXPECTED_STATUS; } else rc = RTErrConvertFromOS2(rcOs2); } else rc = RTErrConvertFromOS2(rcOs2); return rc; } RTDECL(int) RTSerialPortCfgSet(RTSERIALPORT hSerialPort, PCRTSERIALPORTCFG pCfg, PRTERRINFO pErrInfo) { PRTSERIALPORTINTERNAL pThis = hSerialPort; AssertPtrReturn(pThis, VERR_INVALID_PARAMETER); AssertReturn(pThis->u32Magic == RTSERIALPORT_MAGIC, VERR_INVALID_HANDLE); int rc = VINF_SUCCESS; OS2EXTSETBAUDRATEDATA ExtBaudRate; OS2SETLINECTRLDATA LineCtrl; ULONG cbExtBaudRate = sizeof(ExtBaudRate); ULONG cbLineCtrl = sizeof(LineCtrl); ExtBaudRate.uBitRate = pCfg->uBaudRate; ExtBaudRate.bBitRateFrac = 0; BYTE idx = 0; while (idx < RT_ELEMENTS(s_aParityConvTbl)) { if (s_aParityConvTbl[idx] == pCfg->enmParity) { LineCtrl.bParity = idx; break; } idx++; } AssertReturn(idx < RT_ELEMENTS(s_aParityConvTbl), VERR_INTERNAL_ERROR); idx = 0; while (idx < RT_ELEMENTS(s_aDataBitsConvTbl)) { if (s_aDataBitsConvTbl[idx] == pCfg->enmDataBitCount) { LineCtrl.bDataBits = idx; break; } idx++; } AssertReturn(idx < RT_ELEMENTS(s_aDataBitsConvTbl), VERR_INTERNAL_ERROR); idx = 0; while (idx < RT_ELEMENTS(s_aStopBitsConvTbl)) { if (s_aStopBitsConvTbl[idx] == pCfg->enmStopBitCount) { LineCtrl.bStopBits = idx; break; } idx++; } AssertReturn(idx < RT_ELEMENTS(s_aStopBitsConvTbl), VERR_INTERNAL_ERROR); ULONG rcOs2 = DosDevIOCtl(pThis->hDev, IOCTL_ASYNC, ASYNC_EXTSETBAUDRATE, &ExtBaudRate, cbExtBaudRate, &cbExtBaudRate, NULL, 0, NULL); if (!rcOs2) { rcOs2 = DosDevIOCtl(pThis->hDev, IOCTL_ASYNC, ASYNC_SETLINECTRL, &LineCtrl, cbLineCtrl, &cbLineCtrl, NULL, 0, NULL); if (rcOs2) rc = RTErrConvertFromOS2(rcOs2); } else rc = RTErrConvertFromOS2(rcOs2); return rc; } RTDECL(int) RTSerialPortEvtPoll(RTSERIALPORT hSerialPort, uint32_t fEvtMask, uint32_t *pfEvtsRecv, RTMSINTERVAL msTimeout) { PRTSERIALPORTINTERNAL pThis = hSerialPort; AssertPtrReturn(pThis, VERR_INVALID_PARAMETER); AssertReturn(pThis->u32Magic == RTSERIALPORT_MAGIC, VERR_INVALID_HANDLE); AssertReturn(!(fEvtMask & ~RTSERIALPORT_EVT_F_VALID_MASK), VERR_INVALID_PARAMETER); AssertPtrReturn(pfEvtsRecv, VERR_INVALID_POINTER); *pfEvtsRecv = 0; /* * We need to kind of busy wait here as there is, to my knowledge, no API * to wait for a COM event. * * @todo Adaptive waiting * @todo Handle rollover after 48days eventually */ int rc = VINF_SUCCESS; uint64_t tsStart = RTTimeSystemMilliTS(); do { if (ASMAtomicXchgBool(&pThis->fInterrupt, false)) { rc = VERR_INTERRUPTED; break; } USHORT fCommEvt = 0; ULONG cbCommEvt = sizeof(fCommEvt); ULONG rcOs2 = DosDevIOCtl(pThis->hDev, IOCTL_ASYNC, ASYNC_GETCOMMEVENT, NULL, 0, NULL, &fCommEvt, cbCommEvt, &cbCommEvt); if (!rcOs2) { AssertReturn(cbCommEvt = sizeof(fCommEvt), VERR_IPE_UNEXPECTED_STATUS); if ( (fEvtMask & RTSERIALPORT_EVT_F_DATA_RX) && (fCommEvt & OS2_GET_COMM_EVT_RX)) *pfEvtsRecv |= RTSERIALPORT_EVT_F_DATA_RX; /** @todo Is there something better to indicate that there is room in the queue instead of queue is empty? */ if ( (fEvtMask & RTSERIALPORT_EVT_F_DATA_TX) && (fCommEvt & OS2_GET_COMM_EVT_TX_EMPTY)) *pfEvtsRecv |= RTSERIALPORT_EVT_F_DATA_TX; if ( (fEvtMask & RTSERIALPORT_EVT_F_STATUS_LINE_CHANGED) && (fCommEvt & (OS2_GET_COMM_EVT_CTS_CHG | OS2_GET_COMM_EVT_DSR_CHG | OS2_GET_COMM_EVT_DCD_CHG))) *pfEvtsRecv |= RTSERIALPORT_EVT_F_STATUS_LINE_CHANGED; if ( (fEvtMask & RTSERIALPORT_EVT_F_BREAK_DETECTED) && (fCommEvt & OS2_GET_COMM_EVT_BRK)) *pfEvtsRecv |= RTSERIALPORT_EVT_F_BREAK_DETECTED; if (*pfEvtsRecv != 0) break; } else { rc = RTErrConvertFromOS2(rcOs2); break; } uint64_t tsNow = RTTimeSystemMilliTS(); if ( msTimeout == RT_INDEFINITE_WAIT || tsNow - tsStart < msTimeout) DosSleep(1); else rc = VERR_TIMEOUT; } while (RT_SUCCESS(rc)); return rc; } RTDECL(int) RTSerialPortEvtPollInterrupt(RTSERIALPORT hSerialPort) { PRTSERIALPORTINTERNAL pThis = hSerialPort; AssertPtrReturn(pThis, VERR_INVALID_PARAMETER); AssertReturn(pThis->u32Magic == RTSERIALPORT_MAGIC, VERR_INVALID_HANDLE); ASMAtomicXchgBool(&pThis->fInterrupt, true); return VINF_SUCCESS; } RTDECL(int) RTSerialPortChgBreakCondition(RTSERIALPORT hSerialPort, bool fSet) { PRTSERIALPORTINTERNAL pThis = hSerialPort; AssertPtrReturn(pThis, VERR_INVALID_PARAMETER); AssertReturn(pThis->u32Magic == RTSERIALPORT_MAGIC, VERR_INVALID_HANDLE); ULONG rcOs2 = DosDevIOCtl(pThis->hDev, IOCTL_ASYNC, fSet ? ASYNC_SETBREAKON : ASYNC_SETBREAKOFF, NULL, 0, NULL, NULL, 0, NULL); return RTErrConvertFromOS2(rcOs2); } RTDECL(int) RTSerialPortChgStatusLines(RTSERIALPORT hSerialPort, uint32_t fClear, uint32_t fSet) { PRTSERIALPORTINTERNAL pThis = hSerialPort; AssertPtrReturn(pThis, VERR_INVALID_PARAMETER); AssertReturn(pThis->u32Magic == RTSERIALPORT_MAGIC, VERR_INVALID_HANDLE); MODEMSTATUS MdmSts; ULONG cbMdmSts = sizeof(MdmSts); MdmSts.fbModemOn = (fSet & RTSERIALPORT_CHG_STS_LINES_F_RTS ? 0x02 : 0x00) | (fSet & RTSERIALPORT_CHG_STS_LINES_F_DTR ? 0x01 : 0x00); MdmSts.fbModemOff = 0xff; MdmSts.fbModemOff &= ~( (fClear & RTSERIALPORT_CHG_STS_LINES_F_RTS ? 0x02 : 0x00) | (fClear & RTSERIALPORT_CHG_STS_LINES_F_DTR ? 0x01 : 0x00)); ULONG rcOs2 = DosDevIOCtl(pThis->hDev, IOCTL_ASYNC, ASYNC_SETMODEMCTRL, &MdmSts, cbMdmSts, &cbMdmSts, NULL, 0, NULL); return RTErrConvertFromOS2(rcOs2); } RTDECL(int) RTSerialPortQueryStatusLines(RTSERIALPORT hSerialPort, uint32_t *pfStsLines) { PRTSERIALPORTINTERNAL pThis = hSerialPort; AssertPtrReturn(pThis, VERR_INVALID_PARAMETER); AssertReturn(pThis->u32Magic == RTSERIALPORT_MAGIC, VERR_INVALID_HANDLE); AssertPtrReturn(pfStsLines, VERR_INVALID_POINTER); *pfStsLines = 0; int rc = VINF_SUCCESS; BYTE fStsLines = 0; ULONG cbStsLines = sizeof(fStsLines); ULONG rcOs2 = DosDevIOCtl(pThis->hDev, IOCTL_ASYNC, ASYNC_GETMODEMINPUT, NULL, 0, NULL, &fStsLines, cbStsLines, &cbStsLines); if (!rcOs2) { AssertReturn(cbStsLines == sizeof(BYTE), VERR_IPE_UNEXPECTED_STATUS); *pfStsLines |= (fStsLines & OS2_GET_MODEM_INPUT_DCD) ? RTSERIALPORT_STS_LINE_DCD : 0; *pfStsLines |= (fStsLines & OS2_GET_MODEM_INPUT_RI) ? RTSERIALPORT_STS_LINE_RI : 0; *pfStsLines |= (fStsLines & OS2_GET_MODEM_INPUT_DSR) ? RTSERIALPORT_STS_LINE_DSR : 0; *pfStsLines |= (fStsLines & OS2_GET_MODEM_INPUT_CTS) ? RTSERIALPORT_STS_LINE_CTS : 0; } else rc = RTErrConvertFromOS2(rcOs2); return rc; }