clang/lib/Headers/openmp_wrappers/time.h

   1 /*===---- time.h - OpenMP time header wrapper ------------------------ c ---===
   2  *
   3  * Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4  * See https://llvm.org/LICENSE.txt for license information.
   5  * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6  *
   7  *===-----------------------------------------------------------------------===
   8  */
   9
  10 #ifndef __CLANG_OPENMP_TIME_H__
  11 #define __CLANG_OPENMP_TIME_H__
  12
  13 #ifndef _OPENMP
  14 #error "This file is for OpenMP compilation only."
  15 #endif
  16
  17 #if defined(__cplusplus)
  18 #define __DEVICE__ static constexpr __attribute__((always_inline, nothrow))
  19 #else
  20 #define __DEVICE__ static __attribute__((always_inline, nothrow))
  21 #endif
  22
  23 #include_next <time.h>
  24
  25 #pragma omp begin declare variant match(                                       \
  26     device = {arch(nvptx, nvptx64)}, implementation = {extension(match_any)})
  27
  28 __DEVICE__ clock_t clock() { return __nvvm_read_ptx_sreg_clock(); }
  29
  30 #pragma omp end declare variant
  31
  32 #endif