* Copyright 2024, Haiku, Inc. All rights reserved.
* Distributed under the terms of the MIT License.
*/
#ifndef INLINE_REFERENCEABLE_H
#define INLINE_REFERENCEABLE_H
#include <SupportDefs.h>
#include <kernel/debug.h>
* whereas sizeof(BReferenceable) == (sizeof(void*) * 2), this class
* is only sizeof(int32) == 4. */
class InlineReferenceable {
public:
inline InlineReferenceable()
:
fReferenceCount(1)
{
}
inline ~InlineReferenceable()
{
ASSERT(fReferenceCount == 0 || fReferenceCount == 1);
}
inline int32
AcquireReference()
{
const int32 previousCount = atomic_add(&fReferenceCount, 1);
ASSERT(previousCount > 0);
return previousCount;
}
inline int32
ReleaseReference()
{
const int32 previousCount = atomic_add(&fReferenceCount, -1);
ASSERT(previousCount > 0);
return previousCount;
}
inline int32
CountReferences()
{
return atomic_get(&fReferenceCount);
}
private:
int32 fReferenceCount;
};
#define DEFINE_INLINE_REFERENCEABLE_METHODS(CLASS, InlineReferenceable) \
void CLASS::AcquireReference() { InlineReferenceable.AcquireReference(); } \
void CLASS::ReleaseReference() { if (InlineReferenceable.ReleaseReference() == 1) delete this; } \
int32 CLASS::CountReferences() { return InlineReferenceable.CountReferences(); }
#endif
