コード例 #1
0
ファイル: erl_bestfit_alloc.c プロジェクト: Esaud17/otp
UWord
erts_bfalc_test(UWord op, UWord a1, UWord a2)
{
    switch (op) {
    case 0x200:
        return (UWord) ((BFAllctr_t *) a1)->address_order; /* IS_AOBF */
    case 0x201:
        return (UWord) ((BFAllctr_t *) a1)->mbc_root;
    case 0x202:
        return (UWord) ((RBTree_t *) a1)->parent;
    case 0x203:
        return (UWord) ((RBTree_t *) a1)->left;
    case 0x204:
        return (UWord) ((RBTree_t *) a1)->right;
    case 0x205:
        return (UWord) LIST_NEXT(a1);
    case 0x206:
        return (UWord) IS_BLACK((RBTree_t *) a1);
    case 0x207:
        return (UWord) IS_TREE_NODE((RBTree_t *) a1);
    case 0x208:
        return (UWord) 1; /* IS_BF_ALGO */
    case 0x20a:
        return (UWord) !((BFAllctr_t *) a1)->address_order; /* IS_BF */
    case 0x20b:
        return (UWord) LIST_PREV(a1);
    default:
        ASSERT(0);
        return ~((UWord) 0);
    }
}
コード例 #2
0
ファイル: erl_bestfit_alloc.c プロジェクト: Argger/otp
static Block_t *
bf_get_free_block(Allctr_t *allctr, Uint size,
		  Block_t *cand_blk, Uint cand_size)
{
    BFAllctr_t *bfallctr = (BFAllctr_t *) allctr;
    RBTree_t **root = &bfallctr->mbc_root;
    RBTree_t *x = *root;
    RBTree_t *blk = NULL;
    Uint blk_sz;

    ASSERT(!cand_blk || cand_size >= size);

    while (x) {
	blk_sz = BF_BLK_SZ(x);
	if (blk_sz < size) {
	    x = x->right;
	}
	else {
	    blk = x;
	    if (blk_sz == size)
		break;
	    x = x->left;
	}
    }
    
    if (!blk)
	return NULL;

    ASSERT(IS_TREE_NODE(blk));


#ifdef HARD_DEBUG
    {
	RBTree_t *ct_blk = check_tree(root, 0, size);
	ASSERT(BF_BLK_SZ(ct_blk) == BF_BLK_SZ(blk));
    }
#endif

    if (cand_blk && cand_size <= BF_BLK_SZ(blk))
	return NULL; /* cand_blk was better */

    /* Use next block if it exist in order to avoid replacing
       the tree node */
    blk = LIST_NEXT(blk) ? LIST_NEXT(blk) : blk;

    bf_unlink_free_block(allctr, (Block_t *) blk);
    return (Block_t *) blk;
}
コード例 #3
0
ファイル: erl_bestfit_alloc.c プロジェクト: Argger/otp
static ERTS_INLINE void
bf_unlink_free_block(Allctr_t *allctr, Block_t *block)
{
    BFAllctr_t *bfallctr = (BFAllctr_t *) allctr;
    RBTree_t **root = &bfallctr->mbc_root;
    RBTree_t *x = (RBTree_t *) block;

    if (IS_LIST_ELEM(x)) {
	/* Remove from list */
	ASSERT(LIST_PREV(x));
	LIST_NEXT(LIST_PREV(x)) = LIST_NEXT(x);
	if (LIST_NEXT(x))
	    LIST_PREV(LIST_NEXT(x)) = LIST_PREV(x);
    }
    else if (LIST_NEXT(x)) {
	/* Replace tree node by next element in list... */

	ASSERT(BF_BLK_SZ(LIST_NEXT(x)) == BF_BLK_SZ(x));
	ASSERT(IS_TREE_NODE(x));
	ASSERT(IS_LIST_ELEM(LIST_NEXT(x)));

#ifdef HARD_DEBUG
	check_tree(root, 0, 0);
#endif
	replace(root, x, LIST_NEXT(x));

#ifdef HARD_DEBUG
	check_tree(bfallctr, 0);
#endif
    }
    else {
	/* Remove from tree */
	tree_delete(allctr, block);
    }

    DESTROY_LIST_ELEM(x);
}
コード例 #4
0
UWord
erts_aoffalc_test(UWord op, UWord a1, UWord a2)
{
    switch (op) {
    case 0x500: return (UWord) ((AOFFAllctr_t *) a1)->blk_order == FF_AOBF;
    case 0x501: {
	AOFF_RBTree_t *node = ((AOFFAllctr_t *) a1)->mbc_root; 
	Uint size = (Uint) a2;
	node = node ? rbt_search(node, size) : NULL;
	return (UWord) (node ? RBT_NODE_TO_MBC(node)->root : NULL);
    }
    case 0x502:	return (UWord) ((AOFF_RBTree_t *) a1)->parent;
    case 0x503:	return (UWord) ((AOFF_RBTree_t *) a1)->left;
    case 0x504:	return (UWord) ((AOFF_RBTree_t *) a1)->right;
    case 0x505:	return (UWord) LIST_NEXT(a1);
    case 0x506:	return (UWord) IS_BLACK((AOFF_RBTree_t *) a1);
    case 0x507:	return (UWord) IS_TREE_NODE((AOFF_RBTree_t *) a1);
    case 0x508: return (UWord) 0; /* IS_BF_ALGO */
    case 0x509: return (UWord) ((AOFF_RBTree_t *) a1)->max_sz;
    case 0x50a: return (UWord) ((AOFFAllctr_t *) a1)->blk_order == FF_BF;
    case 0x50b:	return (UWord) LIST_PREV(a1);
    default:	ASSERT(0); return ~((UWord) 0);
    }
}
コード例 #5
0
ファイル: erl_bestfit_alloc.c プロジェクト: Argger/otp
static RBTree_t *
check_tree(RBTree_t *root, int ao, Uint size)
{
    RBTree_t *res = NULL;
    Sint blacks;
    Sint curr_blacks;
    RBTree_t *x;

#ifdef PRINT_TREE
    print_tree(root, ao);
#endif

    if (!root)
	return res;

    x = root;
    ASSERT(IS_BLACK(x));
    ASSERT(!x->parent);
    curr_blacks = 1;
    blacks = -1;

    while (x) {
	if (!IS_LEFT_VISITED(x)) {
	    SET_LEFT_VISITED(x);
	    if (x->left) {
		x = x->left;
		if (IS_BLACK(x))
		    curr_blacks++;
		continue;
	    }
	    else {
		if (blacks < 0)
		    blacks = curr_blacks;
		ASSERT(blacks == curr_blacks);
	    }
	}

	if (!IS_RIGHT_VISITED(x)) {
	    SET_RIGHT_VISITED(x);
	    if (x->right) {
		x = x->right;
		if (IS_BLACK(x))
		    curr_blacks++;
		continue;
	    }
	    else {
		if (blacks < 0)
		    blacks = curr_blacks;
		ASSERT(blacks == curr_blacks);
	    }
	}


	if (IS_RED(x)) {
	    ASSERT(IS_BLACK(x->right));
	    ASSERT(IS_BLACK(x->left));
	}

	ASSERT(x->parent || x == root);

	if (x->left) {
	    ASSERT(x->left->parent == x);
	    if (ao) {
		ASSERT(BF_BLK_SZ(x->left) < BF_BLK_SZ(x)
		       || (BF_BLK_SZ(x->left) == BF_BLK_SZ(x) && x->left < x));
	    }
	    else {
		ASSERT(IS_TREE_NODE(x->left));
		ASSERT(BF_BLK_SZ(x->left) < BF_BLK_SZ(x));
	    }
	}

	if (x->right) {
	    ASSERT(x->right->parent == x);
	    if (ao) {
		ASSERT(BF_BLK_SZ(x->right) > BF_BLK_SZ(x)
		       || (BF_BLK_SZ(x->right) == BF_BLK_SZ(x) && x->right > x));
	    }
	    else {
		ASSERT(IS_TREE_NODE(x->right));
		ASSERT(BF_BLK_SZ(x->right) > BF_BLK_SZ(x));
	    }
	}

	if (size && BF_BLK_SZ(x) >= size) {
	    if (ao) {
		if (!res
		    || BF_BLK_SZ(x) < BF_BLK_SZ(res)
		    || (BF_BLK_SZ(x) == BF_BLK_SZ(res) && x < res))
		    res = x;
	    }
	    else {
		if (!res || BF_BLK_SZ(x) < BF_BLK_SZ(res))
		    res = x;
	    }
	}

	UNSET_LEFT_VISITED(x);
	UNSET_RIGHT_VISITED(x);
	if (IS_BLACK(x))
	    curr_blacks--;
	x = x->parent;

    }

    ASSERT(curr_blacks == 0);

    UNSET_LEFT_VISITED(root);
    UNSET_RIGHT_VISITED(root);

    return res;

}
コード例 #6
0
static AOFF_RBTree_t *
check_tree(Carrier_t* within_crr, enum AOFFSortOrder order, AOFF_RBTree_t* root, Uint size)
{
    AOFF_RBTree_t *res = NULL;
    Sint blacks;
    Sint curr_blacks;
    AOFF_RBTree_t *x;
    Carrier_t* crr;
    Uint depth, max_depth, node_cnt;

#ifdef PRINT_TREE
    print_tree(root);
#endif
    ASSERT((within_crr && order >= FF_AOFF) ||
           (!within_crr && order <= FF_AOFF));

    if (!root)
	return res;

    x = root;
    ASSERT(IS_BLACK(x));
    ASSERT(!x->parent);
    curr_blacks = 1;
    blacks = -1;
    depth = 1;
    max_depth = 0;
    node_cnt = 0;

    while (x) {
	if (!IS_LEFT_VISITED(x)) {
	    SET_LEFT_VISITED(x);
	    if (x->left) {
		x = x->left;
		++depth;
		if (IS_BLACK(x))
		    curr_blacks++;
		continue;
	    }
	    else {
		if (blacks < 0)
		    blacks = curr_blacks;
		ASSERT(blacks == curr_blacks);
	    }
	}

	if (!IS_RIGHT_VISITED(x)) {
	    SET_RIGHT_VISITED(x);
	    if (x->right) {
		x = x->right;
		++depth;
		if (IS_BLACK(x))
		    curr_blacks++;
		continue;
	    }
	    else {
		if (blacks < 0)
		    blacks = curr_blacks;
		ASSERT(blacks == curr_blacks);
	    }
	}

	++node_cnt;
	if (depth > max_depth)
	    max_depth = depth;

	if (within_crr) {
	    crr = FBLK_TO_MBC(&x->hdr);
	    ASSERT(crr == within_crr);
	    ASSERT((char*)x > (char*)crr);
	    ASSERT(((char*)x + AOFF_BLK_SZ(x)) <= ((char*)crr + CARRIER_SZ(crr)));

	}
	if (order == FF_BF) {
	    AOFF_RBTree_t* y = x;
	    AOFF_RBTree_t* nxt = LIST_NEXT(y);
	    ASSERT(IS_TREE_NODE(x));
	    while (nxt) {
		ASSERT(IS_LIST_ELEM(nxt));
		ASSERT(AOFF_BLK_SZ(nxt) == AOFF_BLK_SZ(x));
		ASSERT(FBLK_TO_MBC(&nxt->hdr) == within_crr);
		ASSERT(LIST_PREV(nxt) == y);
		y = nxt;
		nxt = LIST_NEXT(nxt);
	    }
	}

	if (IS_RED(x)) {
	    ASSERT(IS_BLACK(x->right));
	    ASSERT(IS_BLACK(x->left));
	}

	ASSERT(x->parent || x == root);

	if (x->left) {
	    ASSERT(x->left->parent == x);
	    ASSERT(cmp_blocks(order, x->left, x) < 0);
	    ASSERT(x->left->max_sz <= x->max_sz);	    
	}

	if (x->right) {
	    ASSERT(x->right->parent == x);
	    ASSERT(cmp_blocks(order, x->right, x) > 0);
	    ASSERT(x->right->max_sz <= x->max_sz);	    
	}
	ASSERT(x->max_sz >= AOFF_BLK_SZ(x));
	ASSERT(x->max_sz == AOFF_BLK_SZ(x)
	       || x->max_sz == (x->left ? x->left->max_sz : 0)
	       || x->max_sz == (x->right ? x->right->max_sz : 0));

	if (size && AOFF_BLK_SZ(x) >= size) {
	    if (!res || cmp_blocks(order, x, res) < 0) {
		res = x;
	    }
	}

	UNSET_LEFT_VISITED(x);
	UNSET_RIGHT_VISITED(x);
	if (IS_BLACK(x))
	    curr_blacks--;
	x = x->parent;
	--depth;
    }
    ASSERT(depth == 0 || (!root && depth==1)); 
    ASSERT(curr_blacks == 0);
    ASSERT((1 << (max_depth/2)) <= node_cnt);

    UNSET_LEFT_VISITED(root);
    UNSET_RIGHT_VISITED(root);

    return res;

}