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#pragma once
#include <atomic>
#include <assert.h>
#include <limits.h>
namespace ComLight
{
// Very base class of objects, implements reference counting.
class RefCounter
{
std::atomic_uint referenceCounter;
public:
RefCounter() : referenceCounter( 0 ) { }
inline virtual ~RefCounter() { }
RefCounter( const RefCounter &that ) = delete;
RefCounter( RefCounter &&that ) = delete;
protected:
uint32_t implAddRef()
{
return ++referenceCounter;
}
uint32_t implRelease()
{
// Might be a good idea to use locks, at least in debug builds. They're much slower than atomics, but with locks it's possible to detect when 2 threads call release at the same time, for object with counter = 1.
// It's a memory management bug, but it would be nice if debug builds would handle that case gracefully.
const uint32_t rc = --referenceCounter;
assert( rc != UINT_MAX );
return rc;
}
};
}
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