| 1 | //===-- Unittests for __sched_cpu_count -----------------------------------===// |
|---|---|
| 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 "src/__support/OSUtil/syscall.h" |
| 10 | #include "src/errno/libc_errno.h" |
| 11 | #include "src/sched/sched_getaffinity.h" |
| 12 | #include "src/sched/sched_getcpucount.h" |
| 13 | #include "test/UnitTest/ErrnoSetterMatcher.h" |
| 14 | |
| 15 | #include <sched.h> |
| 16 | #include <sys/syscall.h> |
| 17 | |
| 18 | TEST(LlvmLibcSchedCpuCountTest, SmokeTest) { |
| 19 | cpu_set_t mask; |
| 20 | LIBC_NAMESPACE::libc_errno = 0; |
| 21 | using LIBC_NAMESPACE::testing::ErrnoSetterMatcher::Succeeds; |
| 22 | pid_t tid = LIBC_NAMESPACE::syscall_impl<pid_t>(SYS_gettid); |
| 23 | ASSERT_GT(tid, pid_t(0)); |
| 24 | ASSERT_THAT(LIBC_NAMESPACE::sched_getaffinity(tid, sizeof(cpu_set_t), &mask), |
| 25 | Succeeds(0)); |
| 26 | |
| 27 | // CPU_COUNT is a macro, but it expands to an LLVM-libc internal function that |
| 28 | // needs to be in the appropriate namespace for the test. |
| 29 | int num_cpus = LIBC_NAMESPACE::CPU_COUNT(&mask); |
| 30 | ASSERT_GT(num_cpus, 0); |
| 31 | ASSERT_LE(num_cpus, int(sizeof(cpu_set_t) * sizeof(unsigned long))); |
| 32 | } |
| 33 |