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// Copyright (C) 2006-2014 David Sugar, Tycho Softworks.
// Copyright (C) 2015-2020 Cherokees of Idaho.
//
// This file is part of GNU uCommon C++.
//
// GNU uCommon C++ is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published
// by the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// GNU uCommon C++ is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with GNU uCommon C++. If not, see <http://www.gnu.org/licenses/>.
#include <ucommon-config.h>
#include <ucommon/export.h>
#include <ucommon/counter.h>
#include <stdlib.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
namespace ucommon {
counter::counter()
{
cycle = value = 0;
}
counter::counter(unsigned max)
{
assert(max > 0);
cycle = max;
value = 0;
}
void counter::operator=(unsigned v)
{
if(!cycle || v < cycle)
value = v;
}
unsigned counter::get(void)
{
unsigned v = value++;
if(cycle && value >= cycle)
value = 0;
return v;
}
SeqCounter::SeqCounter(void *base, size_t size, unsigned limit) :
counter(limit)
{
assert(base != NULL);
assert(size > 0);
assert(limit > 0);
item = base;
offset = size;
}
void *SeqCounter::get(void)
{
unsigned pos = counter::get();
return (caddr_t)item + (pos * offset);
}
void *SeqCounter::get(unsigned pos)
{
if(pos >= range())
return NULL;
return (caddr_t)item + (pos * offset);
}
bool toggle::get(void)
{
bool v = value;
if(value)
value = false;
else
value = true;
return v;
}
} // namespace ucommon
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