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/*
* Copyright (c) 2005, Eric Crahen
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is furnished
* to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
*/
#ifndef __ZTATOMICCOUNTIMPL_H__
#define __ZTATOMICCOUNTIMPL_H__
#include "zthread/Guard.h"
#include "../FastLock.h"
#include <assert.h>
namespace ZThread {
typedef struct atomic_count_t {
FastLock lock;
unsigned long count;
atomic_count_t() : count(0) {}
} ATOMIC_COUNT;
AtomicCount::AtomicCount() {
ATOMIC_COUNT* c = new ATOMIC_COUNT;
_value = reinterpret_cast<void*>(c);
}
AtomicCount::~AtomicCount() {
ATOMIC_COUNT* c = reinterpret_cast<ATOMIC_COUNT*>(_value);
assert(c->count == 0);
delete c;
}
//! Postfix decrement and return the current value
size_t AtomicCount::operator--(int) {
ATOMIC_COUNT* c = reinterpret_cast<ATOMIC_COUNT*>(_value);
Guard<FastLock> g(c->lock);
return c->count--;
}
//! Postfix increment and return the current value
size_t AtomicCount::operator++(int) {
ATOMIC_COUNT* c = reinterpret_cast<ATOMIC_COUNT*>(_value);
Guard<FastLock> g(c->lock);
return c->count++;
}
//! Prefix decrement and return the current value
size_t AtomicCount::operator--() {
ATOMIC_COUNT* c = reinterpret_cast<ATOMIC_COUNT*>(_value);
Guard<FastLock> g(c->lock);
return --c->count;
}
//! Prefix increment and return the current value
size_t AtomicCount::operator++() {
ATOMIC_COUNT* c = reinterpret_cast<ATOMIC_COUNT*>(_value);
Guard<FastLock> g(c->lock);
return ++c->count;
}
};
#endif // __ZTATOMICCOUNTIMPL_H__
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