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MCDTEMP
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MCDSTAT.C
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C/C++ Source or Header
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1993-03-22
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9KB
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185 lines
/****************************************************************************/
/* */
/* SOURCE FILE NAME: MCISTAT.C */
/* */
/* DESCRIPTIVE NAME: MCI_STATUS MESSAGE HANDLER */
/* */
/* COPYRIGHT: (c) IBM Corp. 1991 - 1993 */
/* */
/* FUNCTION: This file contains routines to process the MCI_STATUS message.*/
/* Returns information on the status of this device instance. */
/* See the programming reference for a complete list of status */
/* items. */
/* */
/* ENTRY POINTS: */
/* MCIStatus - Process the mci_status message and return status */
/* MCIStatusErr - Process the mci_status message for errors */
/****************************************************************************/
#define INCL_BASE
#define INCL_DOSSEMAPHORES
#define INCL_MCIOS2 // use the OS/2 like MMPM/2 headers
#include <os2.h> // OS2 defines.
#include <string.h> // string prototypes
#include <stdlib.h> // standard C functions
#include <os2me.h> // MME includes files.
#include "mcdtemp.h" // MCD Function Prototypes and typedefs
/****************************************************************************/
/* */
/* SUBROUTINE NAME: MCIStatus */
/* */
/* DESCRIPTIVE NAME: MCI_STATUS message processor */
/* */
/* FUNCTION: Process the MCI_STATUS message. */
/* */
/* PARAMETERS: */
/* FUNCTION_PARM_BLOCK *pFuncBlock -- Pointer to function parameter */
/* block. */
/* EXIT CODES: */
/* MCIERR_SUCCESS -- Action completed without error. */
/* . */
/* . */
/* . */
/* . */
/* */
/****************************************************************************/
RC MCIStatus (FUNCTION_PARM_BLOCK *pFuncBlock)
{
ULONG ulrc = MCIERR_SUCCESS; // Propogated Error Code
ULONG ulParam1; // Message flags
PMCI_STATUS_PARMS pStatusParms; // Pointer to status structure
PINSTANCE pInstance; // Pointer to instance
MMTIME mmTime; // Current time in MMTIME format
/*****************************************************/
/* dereference the values from pFuncBlock */
/*****************************************************/
ulParam1 = pFuncBlock->ulParam1;
pInstance = pFuncBlock->pInstance;
pStatusParms = (PMCI_STATUS_PARMS)pFuncBlock->pParam2;
/**********************************************************/
/* Lock access to this instance until this command is done*/
/**********************************************************/
DosRequestMutexSem (pInstance->hmtxAccessSem, -2); // wait for semaphore
switch (pStatusParms->ulItem)
{
case MCI_STATUS_TIME_FORMAT:
ULONG_HIWD(ulrc) = MCI_TIME_FORMAT_RETURN;
pStatusParms->ulReturn = pInstance->ulTimeFormat;
break;
case MCI_STATUS_SPEED_FORMAT:
ULONG_HIWD(ulrc) = MCI_SPEED_FORMAT_RETURN;
pStatusParms->ulReturn = pInstance->ulSpeedFormat;
break;
case MCI_STATUS_MODE:
ULONG_HIWD(ulrc) = MCI_MODE_RETURN;
if (pInstance->Active == TRUE)
pStatusParms->ulReturn = pInstance->ulMode;
else
pStatusParms->ulReturn = MCI_MODE_NOT_READY;
break;
case MCI_STATUS_VOLUME:
ULONG_HIWD(ulrc) = MCI_INTEGER_RETURNED;
pStatusParms->ulReturn = pInstance->ulVolume;
break;
case MCI_STATUS_LENGTH:
ULONG_HIWD(ulrc) = MCI_INTEGER_RETURNED;
mmTime = pInstance->ulEndPosition - pInstance->ulStartPosition;
pStatusParms->ulReturn = ConvertTime(mmTime, MCI_FORMAT_MMTIME, pInstance->ulTimeFormat);
break;
case MCI_STATUS_READY:
ULONG_HIWD(ulrc) = MCI_TRUE_FALSE_RETURN;
if (pInstance->Active == TRUE)
{
if (pInstance->ulMode == MCI_MODE_NOT_READY)
pStatusParms->ulReturn = MCI_FALSE;
else
pStatusParms->ulReturn = MCI_TRUE;
}
else
pStatusParms->ulReturn = MCI_FALSE;
break;
case MCI_STATUS_POSITION:
ULONG_HIWD(ulrc) = MCI_INTEGER_RETURNED;
pStatusParms->ulReturn = pInstance->ulCurrentPosition; // need to convert from MMTIME
pStatusParms->ulReturn =
ConvertTime(pInstance->ulCurrentPosition, MCI_FORMAT_MMTIME, pInstance->ulTimeFormat);
break;
default:
ulrc = MCIERR_UNSUPPORTED_FLAG;
break;
} /* Switch */
DosReleaseMutexSem (pInstance->hmtxAccessSem); // release semaphore
/***************************************************************/
/* Send back a notification if the notify flag was on */
/***************************************************************/
if ((ulParam1 & MCI_NOTIFY) & (!ulrc))
mdmDriverNotify (pInstance->usDeviceID,
pStatusParms->hwndCallback,
MM_MCINOTIFY,
pFuncBlock->usUserParm,
MAKEULONG (MCI_STATUS, MCI_NOTIFY_SUCCESSFUL));
return (ulrc);
} /* end of MCIStatus */
/****************************************************************************/
/* */
/* SUBROUTINE NAME: MCIStatusErr */
/* */
/* DESCRIPTIVE NAME: MCI_STATUS message processor for errors */
/* */
/* FUNCTION: Process the MCI_STATUS message for errors */
/* */
/* PARAMETERS: */
/* FUNCTION_PARM_BLOCK *pFuncBlock -- Pointer to function parameter */
/* block. */
/* EXIT CODES: */
/* MCIERR_SUCCESS -- Action completed without error. */
/* . */
/* . */
/* . */
/* . */
/* */
/****************************************************************************/
RC MCIStatusErr (FUNCTION_PARM_BLOCK *pFuncBlock)
{
ULONG ulrc = MCIERR_SUCCESS; // Propogated Error Code
ULONG ulParam1; // Message flags
PMCI_STATUS_PARMS pStatusParms; // Pointer to status structure
PINSTANCE pInstance; // Pointer to instance
/*****************************************************/
/* dereference the values from pFuncBlock */
/*****************************************************/
ulParam1 = pFuncBlock->ulParam1;
pInstance = pFuncBlock->pInstance;
pStatusParms = (PMCI_STATUS_PARMS)pFuncBlock->pParam2;
return (ulrc);
} /* end of MCIStatusErr */