File size: 1,947 Bytes
501e3f2 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 | // -*- C++ -*-
//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
// SPDX-FileCopyrightText: Copyright (c) 2023 NVIDIA CORPORATION & AFFILIATES.
//
//===----------------------------------------------------------------------===//
#ifndef _LIBCUDACXX___CUDA_CHRONO_H
#define _LIBCUDACXX___CUDA_CHRONO_H
#ifndef __cuda_std__
#error "<__cuda/chrono> should only be included in from <cuda/std/chrono>"
#endif // __cuda_std__
#include <nv/target>
#if defined(_CCCL_IMPLICIT_SYSTEM_HEADER_GCC)
# pragma GCC system_header
#elif defined(_CCCL_IMPLICIT_SYSTEM_HEADER_CLANG)
# pragma clang system_header
#elif defined(_CCCL_IMPLICIT_SYSTEM_HEADER_MSVC)
# pragma system_header
#endif // no system header
_LIBCUDACXX_BEGIN_NAMESPACE_STD
namespace chrono {
inline _LIBCUDACXX_INLINE_VISIBILITY
system_clock::time_point system_clock::now() noexcept
{
NV_DISPATCH_TARGET(
NV_IS_DEVICE, (
uint64_t __time;
asm volatile("mov.u64 %0, %%globaltimer;":"=l"(__time)::);
return time_point(duration_cast<duration>(nanoseconds(__time)));
),
NV_IS_HOST, (
return time_point(duration_cast<duration>(nanoseconds(
::std::chrono::duration_cast<::std::chrono::nanoseconds>(
::std::chrono::system_clock::now().time_since_epoch()
).count()
)));
));
}
inline _LIBCUDACXX_INLINE_VISIBILITY
time_t system_clock::to_time_t(const system_clock::time_point& __t) noexcept
{
return time_t(duration_cast<seconds>(__t.time_since_epoch()).count());
}
inline _LIBCUDACXX_INLINE_VISIBILITY
system_clock::time_point system_clock::from_time_t(time_t __t) noexcept
{
return time_point(seconds(__t));;
}
}
_LIBCUDACXX_END_NAMESPACE_STD
#endif // _LIBCUDACXX___CUDA_CHRONO_H
|