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46 lines
1.3 KiB
C
46 lines
1.3 KiB
C
/*
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* Copyright (C) 2016 Andrea Mazzoleni
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __BW_H
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#define __BW_H
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#include "state.h"
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#include "support.h"
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/**
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* Bandwidth limiting
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*/
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struct snapraid_bw {
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uint64_t limit; /**< Bandwidth limit in bytes per second */
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uint64_t total; /**< Remaining bytes allowed in current second */
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uint64_t start; /**< Time when to reset the bandwidth counter */
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};
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/**
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* Initialize the bandwidth limit
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*/
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void bw_init(struct snapraid_bw* bw, uint64_t limit);
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/**
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* Limit IO bandwidth to stay within the configured limit.
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* If no limit is set, returns immediately.
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* Otherwise sleeps as needed to maintain the rate limit.
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*/
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void bw_limit(struct snapraid_bw* bw, uint64_t bytes);
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#endif
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