madd_tmo.c

来自「Hyper Operating System。基于ITRON接口的实时操作系统。」· C语言 代码 · 共 82 行

/* ------------------------------------------------------------------------ */
/*  Hyper Operating System V4  μITRON4.0慌屯 Real-Time OS                  */
/*    μカ〖ネル タイムアウトキュ〖瓷妄                                     */
/*                                                                          */
/*                                  Copyright (C) 1998-2002 by Project HOS  */
/*                                  http://sourceforge.jp/projects/hos/     */
/* ------------------------------------------------------------------------ */


#include "mknl.h"



/* タイムアウト略ち乖误にタスクを纳裁 */
ER mknl_add_tmout(
		T_MKNL_TCB *mtcb,	/* 略ち乖误に裁えるタスク */
		RELTIM     tmout)	/* タイムアウトまでの箕粗 */
{
	T_MKNL_TCB* mtcb_tmp;

	/* 呵介の１つなら */
	if ( mknl_timout_head == NULL )
	{
		/* 呵介の１つをキュ〖に判峡 */
		mtcb->tm_next    = mtcb;
		mtcb->tm_prev    = mtcb;
		mknl_timout_head = mtcb;

		/* タイムアウト箕癸を肋年 */
		mtcb->diftim = tmout;

		return E_OK;
	}
	
	/* 赁掐眷疥を浮瑚 */
	mtcb_tmp = mknl_timout_head;
	do
	{
		/* 箕粗孺秤 */
		if ( tmout < mtcb_tmp->diftim )
		{
			/* 箕粗の汗尸を肋年 */
			mtcb_tmp->diftim -= tmout;
			mtcb->diftim      = tmout;

			/* リストに赁掐 */
			mtcb->tm_next          = mtcb_tmp;
			mtcb->tm_prev          = mtcb_tmp->tm_prev;
			mtcb->tm_next->tm_prev = mtcb;
			mtcb->tm_prev->tm_next = mtcb;
			
			/* 黎片なら */
			if ( mtcb_tmp == mknl_timout_head )
			{
				mknl_timout_head = mtcb;	/* 黎片ポインタ构糠 */
			}
			
			return E_OK;
		}
		
		tmout -= mtcb_tmp->diftim;		/* 汗尸を负换 */
		
		mtcb_tmp = mtcb_tmp->tm_next;	/* 肌のTCBへ渴む */
	} while ( mtcb_tmp != mknl_timout_head );	/* リストを办件するまでル〖プ */
	
	/* 琐萨に纳裁 */
	mtcb->tm_next          = mtcb_tmp;
	mtcb->tm_prev          = mtcb_tmp->tm_prev;
	mtcb->tm_next->tm_prev = mtcb;
	mtcb->tm_prev->tm_next = mtcb;

	/* 荒った汗尸を肋年 */
	mtcb->diftim = tmout;

	return E_OK;
}


/* ------------------------------------------------------------------------ */
/*  Copyright (C) 1998-2002 by Project HOS                                  */
/* ------------------------------------------------------------------------ */