amxmodx/public/amtl/am-refcounting-threadsafe.h

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// vim: set sts=8 ts=2 sw=2 tw=99 et:
//
// Copyright (C) 2013, David Anderson and AlliedModders LLC
// All rights reserved.
//
// 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 AlliedModders LLC 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.
#ifndef _include_amtl_ts_refcounting_h_
#define _include_amtl_ts_refcounting_h_
#include <am-refcounting.h>
#include <am-atomics.h>
namespace ke {
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// See the comment above Refcounted<T> for more information. This class is
// identical, except changing the reference count is guaranteed to be atomic
// with respect to other threads changing the reference count.
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template <typename T>
class RefcountedThreadsafe
{
public:
RefcountedThreadsafe()
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: refcount_(0)
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{
}
void AddRef() {
refcount_.increment();
}
bool Release() {
if (!refcount_.decrement()) {
delete static_cast<T *>(this);
return false;
}
return true;
}
protected:
~RefcountedThreadsafe() {
}
private:
AtomicRefCount refcount_;
};
} // namespace ke
#endif // _include_amtl_ts_refcounting_h_