9feff969a0
These ones were unambiguous cases where the Foundation was the only listed copyright holder (in the associated license block). Sponsored by: The FreeBSD Foundation
88 lines
2.9 KiB
C
88 lines
2.9 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2019 The FreeBSD Foundation
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*
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* This software was developed by Konstantin Belousov <kib@FreeBSD.org>
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* under sponsorship from the FreeBSD Foundation.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _SYS_RANGESET_H
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#define _SYS_RANGESET_H
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#ifdef _KERNEL
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#include <sys/_rangeset.h>
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typedef bool (*rs_pred_t)(void *ctx, void *r);
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/*
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* This structure must be embedded at the start of the rangeset element.
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*/
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struct rs_el {
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uint64_t re_start; /* pctrie key */
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uint64_t re_end;
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};
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void rangeset_init(struct rangeset *rs, rs_dup_data_t dup_data,
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rs_free_data_t free_data, void *rs_data_ctx, u_int alloc_flags);
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void rangeset_fini(struct rangeset *rs);
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bool rangeset_check_empty(struct rangeset *rs, uint64_t start,
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uint64_t end);
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/*
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* r point to the app data with struct rs_el at the beginning.
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*/
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int rangeset_insert(struct rangeset *rs, uint64_t start, uint64_t end,
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void *r);
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/*
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* Guarantees that on error the rangeset is not modified. Remove
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* might need to split element if its start/end completely cover the
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* removed range, in which case ENOMEM might be returned.
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*/
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void rangeset_remove_all(struct rangeset *rs);
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int rangeset_remove(struct rangeset *rs, uint64_t start, uint64_t end);
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int rangeset_remove_pred(struct rangeset *rs, uint64_t start,
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uint64_t end, rs_pred_t pred);
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/*
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* Really returns the pointer to the data with struct rs_el embedded
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* at the beginning.
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*/
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void *rangeset_lookup(struct rangeset *rs, uint64_t place);
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/*
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* Copies src_rs entries into dst_rs. dst_rs must be empty.
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* Leaves dst_rs empty on failure.
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*/
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int rangeset_copy(struct rangeset *dst_rs, struct rangeset *src_rs);
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#endif
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#endif
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