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