cre_hep.c

来自「iTRON4.0最新操作系统」· C语言 代码 · 共 57 行

/* ------------------------------------------------------------------------ */
/*  Hyper Operating System V4  μITRON4.0慌屯 Real-Time OS                  */
/*    カ〖ネル メモリ瓷妄                                                   */
/*                                                                          */
/*                                  Copyright (C) 1998-2006 by Project HOS  */
/*                                  http://sourceforge.jp/projects/hos/     */
/* ------------------------------------------------------------------------ */



#include "knl_hep.h"



/* メモリヒ〖プを栏喇 */
void kernel_cre_hep(
		T_KERNEL_HEPCB *pk_hepcb,
		void           *p_base,
		SIZE           size)
{
	T_KERNEL_HEPBLK *blk_last;
	
	/* サイズのアライメントを拇腊 */
	size &= ~(KERNEL_HEP_MEMALIGN - 1);

	/* サイズチェック */
	if ( size <= sizeof(T_KERNEL_HEPBLK) )
	{
		pk_hepcb->base = NULL;
		return;
	}

	/* 肋年瘦赂 */
	pk_hepcb->base   = (T_KERNEL_HEPBLK *)p_base;
	pk_hepcb->heapsz = size;
	
	/* 姜眉疤弥に戎客を肋年 */
	blk_last = (T_KERNEL_HEPBLK *)((UB *)p_base + size - KERNEL_HEP_BLKSIZE);
	
	/* 链挛を鄂き挝拌に肋年 */
	pk_hepcb->base->prev = NULL;
	pk_hepcb->base->size = size - (KERNEL_HEP_BLKSIZE * 2);
	pk_hepcb->base->flag = KERNEL_HEP_FREE;
	
	/* 姜眉の戎客を网脱面に肋年 */
	blk_last->prev = NULL;
	blk_last->size = 0;
	blk_last->flag = KERNEL_HEP_USING;
}



/* ------------------------------------------------------------------------ */
/*  Copyright (C) 1998-2006 by Project HOS                                  */
/* ------------------------------------------------------------------------ */