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// This code contains NVIDIA Confidential Information and is disclosed to you
// under a form of NVIDIA software license agreement provided separately to you.
//
// Notice
// NVIDIA Corporation and its licensors retain all intellectual property and
/*
* Copyright (c) 2016-2017, NVIDIA CORPORATION. All rights reserved.
*
* NVIDIA CORPORATION and its licensors retain all intellectual property
* and proprietary rights in and to this software, related documentation
* and any modifications thereto. Any use, reproduction, disclosure or
* distribution of this software and related documentation without an express
* license agreement from NVIDIA CORPORATION is strictly prohibited.
*/
#ifndef NVBLASTTKGUID_H
#define NVBLASTTKGUID_H
#include "NvPreprocessor.h"
#if NV_WINDOWS_FAMILY
#include <rpc.h>
#else
//#include <uuid/uuid.h>
#include "NvBlastTime.h"
#endif
#include "PsHash.h"
namespace Nv
{
namespace Blast
{
#if NV_WINDOWS_FAMILY
NV_INLINE NvBlastID TkGenerateGUID(void* ptr)
{
NV_UNUSED(ptr);
NV_COMPILE_TIME_ASSERT(sizeof(UUID) == sizeof(NvBlastID));
NvBlastID guid;
UuidCreate(reinterpret_cast<UUID*>(&guid));
return guid;
}
#else
NV_INLINE NvBlastID TkGenerateGUID(void* ptr)
{
// NV_COMPILE_TIME_ASSERT(sizeof(uuid_t) == sizeof(NvBlastID));
Time time;
NvBlastID guid;
// uuid_generate_random(reinterpret_cast<uuid_t&>(guid));
*reinterpret_cast<uint64_t*>(guid.data) = reinterpret_cast<uintptr_t>(ptr);
*reinterpret_cast<int64_t*>(guid.data + 8) = time.getLastTickCount();
return guid;
}
#endif
/**
Compares two NvBlastIDs.
\param[in] id1 A pointer to the first id to compare.
\param[in] id2 A pointer to the second id to compare.
\return true iff ids are equal.
*/
NV_INLINE bool TkGUIDsEqual(const NvBlastID* id1, const NvBlastID* id2)
{
return !memcmp(id1, id2, sizeof(NvBlastID));
}
/**
Clears an NvBlastID (sets all of its fields to zero).
\param[out] id A pointer to the ID to clear.
*/
NV_INLINE void TkGUIDReset(NvBlastID* id)
{
memset(id, 0, sizeof(NvBlastID));
}
/**
Tests an NvBlastID to determine if it's zeroed. After calling TkGUIDReset
on an ID, passing it to this function will return a value of true.
\param[in] id A pointer to the ID to test.
*/
NV_INLINE bool TkGUIDIsZero(const NvBlastID* id)
{
return *reinterpret_cast<const uint64_t*>(&id->data[0]) == 0 && *reinterpret_cast<const uint64_t*>(&id->data[8]) == 0;
}
} // namespace Blast
} // namespace Nv
namespace physx
{
namespace shdfnd
{
// hash specialization for NvBlastID
template <>
struct Hash<NvBlastID>
{
uint32_t operator()(const NvBlastID& k) const
{
// "DJB" string hash
uint32_t h = 5381;
for (uint32_t i = 0; i < sizeof(k.data) / sizeof(k.data[0]); ++i)
h = ((h << 5) + h) ^ uint32_t(k.data[i]);
return h;
}
bool equal(const NvBlastID& k0, const NvBlastID& k1) const
{
return Nv::Blast::TkGUIDsEqual(&k0, &k1);
}
};
} // namespace shdfnd
} // namespace physx
#endif // #ifndef NVBLASTTKGUID_H
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