/usr/include/dnsdb/zdb-lock.h is in libyadifa-dev 2.1.6-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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*
* Copyright (c) 2011-2016, EURid. All rights reserved.
* The YADIFA TM software product is provided under the BSD 3-clause license:
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of EURid nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
*------------------------------------------------------------------------------
*
*/
/** @defgroup dnsdb Zone database
* @brief The zone database
*
* Implementation of structures and functions for the database
*
* Memory usage approxymation:
*
* let:
*
* "digest" the size of a digest
* "n3pc" the number of nsec3param
* "r" the number of records
*
* Memory usage =~ (233.3333 + ((446.666+digest) * n3pc) * r
*
* Or, if the digest size is different for each n3p:
*
* With "digest(n)" being the size of the digest for the n-th nsec3param
*
* =~ (233.3333 + SUM[n=1..n3pc](446.666+digest(n))) * r
*
* @{
*/
#pragma once
#include <dnsdb/zdb_types.h>
static inline void zdb_lock(zdb *db, u8 owner)
{
group_mutex_lock(&db->mutex, owner);
}
static inline void zdb_unlock(zdb *db, u8 owner)
{
group_mutex_unlock(&db->mutex, owner);
}
static inline bool zdb_islocked(zdb *db)
{
mutex_lock(&db->mutex.mutex);
bool r = db->mutex.owner != 0;
mutex_unlock(&db->mutex.mutex);
return r;
}
static inline bool zdb_islocked_by(zdb *db, u8 owner)
{
mutex_lock(&db->mutex.mutex);
bool r = (db->mutex.owner == (owner & 0x7f));
mutex_unlock(&db->mutex.mutex);
return r;
}
/** @} */
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