def_msg.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.
 *
 *----------------------------------------------------------------------
 */

/*
 *	def_msg.c (libtkse)
 *
 *	Message management
 *	Message handler definitions, terminate message handler
 */

#include <basic.h>
#include <extension/extension.h>
#include <sys/msghdr.h>


/*
 * Terminate message handler
 */
EXPORT ER tkse_ret_msg( W ret )
{
	if ( ret == 0 ) {
		/* Return to the position of message interruption. */
		longjmp(_MsgHdrJmpBuf, 1);
	} else {
		/* Terminate message handler and continue. */
		tkse_RetMsgHdr(1);

		/* If there are multiple message handler startup requests,
		   Message handler starts again just
		   after tkse_RetMsgHdr(). */
	}
	return E_OK;
}

/*
 * Definitions of message handler
 */
EXPORT ER tkse_def_msg( W t_mask, FUNCP msg_hdr )
{
	return 	( t_mask <= 0 )? E_PAR :
			tkse_DefMsgHdr((W)((UW)t_mask << 1), msg_hdr, &_MsgHandlers[0]);
}