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-exception |
6 | // |
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 | |
16 | TEST(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 will |
21 | // compile. |
22 | #ifdef LIBC_TARGET_ARCH_IS_GPU |
23 | ASSERT_EQ(result, -1); |
24 | #else |
25 | ASSERT_EQ(result, 0); |
26 | ASSERT_GT(tp.tv_sec, time_t(0)); |
27 | #endif |
28 | } |
29 | |
30 | #ifdef CLOCK_MONOTONIC |
31 | TEST(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_MONOTONIC |
45 | |