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#ifndef TOOLBOX_SHARED_H
#define TOOLBOX_SHARED_H
#include "tools/tools.h"
struct cSharedData {
private:
uint m_Length;
uint m_NumRefs;
public:
static cSharedData *Construct (size_t Length);
operator char * () { return this ? (char*)(this+1) : 0; }
uint operator++ () { return ++m_NumRefs; }
uint operator-- () { return --m_NumRefs; }
size_t Size() const { return m_Length; }
uint Refs () const { return m_NumRefs; }
};
class cTBShared {
private:
cSharedData *m_Buffer;
protected:
void Release();
void Exclusive();
void Allocate(size_t len, bool keep = false);
char *Buffer() const { return m_Buffer ? (char*)*m_Buffer : (char*)0; }
public:
cTBShared (void);
cTBShared (const cTBShared &src);
virtual ~cTBShared ();
virtual void Clear ();
virtual void Set (const cTBShared &src);
virtual char *Buffer (uint size);
virtual void Release (uint newsize);
cTBShared &operator= (const cTBShared &src) { Set(src); return *this; }
operator const void * () const { return m_Buffer ? (const void*)*m_Buffer : (const void*)0; }
operator void * () const { return m_Buffer ? (void*)*m_Buffer : (void*)0; }
operator const char * () const { return m_Buffer ? (const char*)*m_Buffer : (const char*)0; }
size_t Size() const { return m_Buffer ? m_Buffer->Size() : 0; }
size_t Length() const { return m_Buffer ? m_Buffer->Size() : 0; }
// friend cSource &operator>> (cSource &dest, cTBShared &str);
};
inline char *cTBShared::Buffer(uint size) {
if ((!m_Buffer) || (m_Buffer->Refs() > 1) || (size > m_Buffer->Size()))
Allocate(size, true);
return Buffer();
}
#endif // TOOLBOX_SHARED_H
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