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/**
@file GUniqueID.h
@author Morgan McGuire, http://graphics.cs.williams.edu
*/
#ifndef G3D_GUNIQUEID_H
#define G3D_GUNIQUEID_H
#include "G3D/platform.h"
#include "G3D/g3dmath.h"
#include "G3D/Table.h"
namespace G3D {
/** Globally unique identifiers. The probability of two different
programs generating the same value from UniqueID::create is
vanishingly small.
UniqueIDs optionally contain a 10-bit application specific tag
that distinguishes their type.
*/
class GUniqueID {
private:
uint64 id;
public:
GUniqueID() : id(0) {}
bool uninitialized() const {
return id == 0;
}
uint16 tag() const {
return id >> 54;
}
operator uint64() const {
return id;
}
bool operator==(const GUniqueID& other) const {
return id == other.id;
}
bool operator!=(const GUniqueID& other) const {
return id != other.id;
}
void serialize(class BinaryOutput& b) const;
void deserialize(class BinaryInput& b);
void serialize(class TextOutput& t) const;
void deserialize(class TextInput& t);
/** Create a new ID */
static GUniqueID create(uint16 tag = 0);
};
} // G3D
/** For Table and Set */
template<> struct HashTrait<class G3D::GUniqueID> {
static size_t hashCode(G3D::GUniqueID id) { return (size_t)(G3D::uint64)id; }
};
#endif
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