iodev.c

wince host 和 target PCI驱动程序

/*
COPYRIGHT (c) 1996 by Philips Semiconductors

THIS SOFTWARE IS FURNISHED UNDER A LICENSE AND MAY ONLY BE USED AND COPIED IN 
ACCORDANCE WITH THE TERMS AND CONDITIONS OF SUCH A LICENSE AND WITH THE 
INCLUSION OF THE THIS COPY RIGHT NOTICE. THIS SOFTWARE OR ANY OTHER COPIES 
OF THIS SOFTWARE MAY NOT BE PROVIDED OR OTHERWISE MADE AVAILABLE TO ANY OTHER
PERSON. THE OWNERSHIP AND TITLE OF THIS SOFTWARE IS NOT TRANSFERRED. 

THE INFORMATION IN THIS SOFTWARE IS SUBJECT TO CHANGE WITHOUT ANY PRIOR NOTICE
AND SHOULD NOT BE CONSTRUED AS A COMMITMENT BY Philips Semiconductor. 

PHILIPS ASSUMES NO RESPONSIBILITY FOR THE USE OR RELIABILITY OF THIS SOFTWARE
ON PLATFORMS OTHER THAN THE ONE ON WHICH THIS SOFTWARE IS FURNISHED.
*/

/*
	Copyright (c) 1996 Philips Semiconductors - TriMedia. All rights reserved.

FILE	iodev.c

HISTORY
	#define TR Tilakraj Roy
	950201	TR Created

*/

#include "windows.h"
#include "stdcom.h"
#include "iodev.h"

IODEV_VTBL IoDevVtbl = 
{
	iodevCreate,
	iodevDestroy,
	iodevOpen,
	iodevClose,
	iodevReadChar,
	iodevWriteChar,
	iodevWriteStr
};

// generic iodev object definition.

BOOL	iodevCreate ( INTERFACE_ID RefIID, PVOID *pObject )
{
	PIODEV_OBJECT	pIoDev;

	if ( *pObject == NULL )
	{
		if ( ( pIoDev = malloc ( sizeof ( IODEV_OBJECT ) ) ) == NULL )
		{	
			*pObject = NULL;
			return FALSE;
		}
		else
		{
			pIoDev->pvRef = pIoDev;
			if ( QueryInterface ( RefIID, &pIoDev->pVtbl ) == FALSE )
			{
				free (pIoDev);	
				return FALSE;
			}
			*pObject = &pIoDev;
			return TRUE;
		}
	}
	else
	{
		pIoDev = (PIODEV_OBJECT)*pObject;
		pIoDev->pvRef = pIoDev;
		if ( QueryInterface ( RefIID, &pIoDev->pVtbl ) == FALSE )
		{
			free (pIoDev);	
			return FALSE;
		}
		return TRUE;
	}
}

BOOL	iodevDestroy ( PVOID pObject )
{
	PIODEV_OBJECT	pIoDev = (PIODEV_OBJECT)pObject;
	if ( pIoDev->pvRef != pIoDev )
		return FALSE;
	free ( pIoDev );
}

BOOL	iodevOpen ( PVOID pObject )
{
	PIODEV_OBJECT	pIoDev = (PIODEV_OBJECT)pObject;

	if ( ( pIoDev->hFile =
		CreateFile( (char *)&pIoDev->szName, GENERIC_READ | GENERIC_WRITE,
	          0,                    // exclusive access
	          NULL,                 // no security attrs
	          OPEN_EXISTING,
	          FILE_ATTRIBUTE_NORMAL, // | FILE_FLAG_OVERLAPPED,
	          NULL )) == (HANDLE) -1 )
	{
		return	FALSE;
	}
	return TRUE;
}

VOID	iodevClose (PVOID pObject)
{
	PIODEV_OBJECT	pIoDev = (PIODEV_OBJECT)pObject;
	CloseHandle(pIoDev->hFile);
}

BOOL	iodevWriteStr (PVOID pObject, PSTR pszString)
{
	PIODEV_OBJECT	pIoDev = (PIODEV_OBJECT)pObject;
	return  pIoDev->pVtbl->WriteChar ( pIoDev, pszString, strlen (pszString) );
}

BOOL	iodevReadChar(PVOID pObject, PVOID pBuffer, DWORD dwLength)
{
	BOOL	fReadStat;
	DWORD	dwBytesRead;
	PIODEV_OBJECT	pIoDev = (PIODEV_OBJECT)pObject;

	return (fReadStat = ReadFile( pIoDev->hFile, pBuffer,
		dwLength, &dwBytesRead, NULL ) ) ;
}

BOOL	iodevWriteChar(PVOID pObject, PVOID pBuffer, DWORD dwLength)
{
	BOOL	fWriteStat;
	DWORD	dwBytesWritten;
	PIODEV_OBJECT	pIoDev = (PIODEV_OBJECT)pObject;

	return (fWriteStat = WriteFile( pIoDev->hFile, pBuffer,
		dwLength, &dwBytesWritten, NULL ) ) ;
}