raw_cio3.c

T-kernel 的extension源代码

/*
 *----------------------------------------------------------------------
 *    T-Kernel / Standard Extension
 *
 *    Copyright (C) 2006 by Ken Sakamura. All rights reserved.
 *    T-Kernel / Standard Extension is distributed 
 *      under the T-License for T-Kernel / Standard Extension.
 *----------------------------------------------------------------------
 *
 *    Version:   1.00.00
 *    Released by T-Engine Forum(http://www.t-engine.org) at 2006/8/11.
 *
 *----------------------------------------------------------------------
 */

/*
 *	@(#)raw_cio3.c 
 *
 *	The console I/O (on the side of use)
 */

#include <basic.h>
#include <sys/consio.h>


EXPORT	W	__MyConsPort = 0;

#define	MyPort		((__MyConsPort <= 0) ? __GetMyPort() : __MyConsPort)

/*----------------------------------------------------------------------
        Get the console port
----------------------------------------------------------------------*/
EXPORT	W     __GetMyPort( void )
{
	if (__MyConsPort <= 0) {
		if (console_conf(CS_GETPORT, (UW*)&__MyConsPort) < 0) {
			__MyConsPort = CONSOLE_PORT;
		}
	}
	return	__MyConsPort;
}
/*----------------------------------------------------------------------
        IOCTL of the console
----------------------------------------------------------------------*/
W     cons_ioctl(W req, W arg)
{
	return	console_ctl(MyPort, req, arg);
}
/*----------------------------------------------------------------------
        Initialize the console port
----------------------------------------------------------------------*/
void	cons_init( void )
{
	__MyConsPort = 0;
	__GetMyPort();
}