/usr/include/kannel/gwlib/counter.h is in kannel-dev 1.4.3-2+b2.
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* The Kannel Software License, Version 1.0
*
* Copyright (c) 2001-2009 Kannel Group
* Copyright (c) 1998-2001 WapIT Ltd.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. 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.
*
* 3. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Kannel Group (http://www.kannel.org/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Kannel" and "Kannel Group" must not be used to
* endorse or promote products derived from this software without
* prior written permission. For written permission, please
* contact org@kannel.org.
*
* 5. Products derived from this software may not be called "Kannel",
* nor may "Kannel" appear in their name, without prior written
* permission of the Kannel Group.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED 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 KANNEL GROUP OR ITS 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.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Kannel Group. For more information on
* the Kannel Group, please see <http://www.kannel.org/>.
*
* Portions of this software are based upon software originally written at
* WapIT Ltd., Helsinki, Finland for the Kannel project.
*/
/*
* gwlib/counter.h - a counter object
*
* Kannel has monotonously growing counters in some places, and these need
* to work even when several threads use them. This header defines the
* type Counter that provides such a counter. The counter is a long, and
* if it reaches LONG_MAX, it wraps around to zero (_NOT_ LONG_MIN).
*
* Lars Wirzenius.
*
* Changed the counter type 'long' into 'unsigned long' so it wraps
* by itself. Just keep increasing it.
* Also added a counter_increase_with function.
* harrie@lisanza.net
*/
#ifndef COUNTER_H
#define COUNTER_H
typedef struct Counter Counter;
/* create a new counter object. PANIC if fails */
Counter *counter_create(void);
/* destroy it */
void counter_destroy(Counter *counter);
/* return the current value of the counter and increase counter by one */
unsigned long counter_increase(Counter *counter);
/* return the current value of the counter and increase counter by value */
unsigned long counter_increase_with(Counter *counter, unsigned long value);
/* return the current value of the counter */
unsigned long counter_value(Counter *counter);
/* return the current value of the counter and decrease counter by one */
unsigned long counter_decrease(Counter *counter);
/* return the current value of the counter and set it to the supplied value */
unsigned long counter_set(Counter *, unsigned long);
#endif
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