8393ea5d1d
Summary: This patch implements `clock_gettime` using the monotonic clock. This allows users to get time elapsed at nanosecond resolution. This is primarily to facilitate compiling the `chrono` library from `libc++`. For this reason we provide both `CLOCK_MONOTONIC`, which we can implement with the GPU's global fixed-frequency clock, and `CLOCK_REALTIME` which we cannot. The latter is provided just to make people who use this header happy and it will always return failure.
18 lines
585 B
C
18 lines
585 B
C
//===-- Definition of macros from time.h ---------------------------------===//
|
|
//
|
|
// 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
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_LIBC_MACROS_GPU_TIME_MACROS_H
|
|
#define LLVM_LIBC_MACROS_GPU_TIME_MACROS_H
|
|
|
|
#define CLOCK_REALTIME 0
|
|
#define CLOCK_MONOTONIC 1
|
|
|
|
#define CLOCKS_PER_SEC 1000000
|
|
|
|
#endif // LLVM_LIBC_MACROS_GPU_TIME_MACROS_H
|