45 lines · cpp
1//===-- Unittests for clock_gettime ---------------------------------------===//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-exception6//7//===----------------------------------------------------------------------===//8 9#include "hdr/time_macros.h"10#include "hdr/types/struct_timespec.h"11#include "hdr/types/time_t.h"12#include "src/__support/macros/properties/architectures.h"13#include "src/time/clock_gettime.h"14#include "test/UnitTest/Test.h"15 16TEST(LlvmLibcClockGetTime, RealTime) {17 timespec tp;18 int result;19 result = LIBC_NAMESPACE::clock_gettime(CLOCK_REALTIME, &tp);20 // The GPU does not implement CLOCK_REALTIME but provides it so programs will21 // compile.22#ifdef LIBC_TARGET_ARCH_IS_GPU23 ASSERT_EQ(result, -1);24#else25 ASSERT_EQ(result, 0);26 ASSERT_GT(tp.tv_sec, time_t(0));27#endif28}29 30#ifdef CLOCK_MONOTONIC31TEST(LlvmLibcClockGetTime, MonotonicTime) {32 timespec tp1, tp2;33 int result;34 result = LIBC_NAMESPACE::clock_gettime(CLOCK_MONOTONIC, &tp1);35 ASSERT_EQ(result, 0);36 ASSERT_GT(tp1.tv_sec, time_t(0));37 result = LIBC_NAMESPACE::clock_gettime(CLOCK_MONOTONIC, &tp2);38 ASSERT_EQ(result, 0);39 ASSERT_GE(tp2.tv_sec, tp1.tv_sec); // The monotonic clock should increase.40 if (tp2.tv_sec == tp1.tv_sec) {41 ASSERT_GE(tp2.tv_nsec, tp1.tv_nsec);42 }43}44#endif // CLOCK_MONOTONIC45