| //===-- Unittests for __sched_cpu_count -----------------------------------===// |
| // |
| // 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 |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "src/__support/OSUtil/syscall.h" |
| #include "src/errno/libc_errno.h" |
| #include "src/sched/sched_getaffinity.h" |
| #include "src/sched/sched_getcpucount.h" |
| #include "test/UnitTest/ErrnoSetterMatcher.h" |
| |
| #include <sched.h> |
| #include <sys/syscall.h> |
| |
| TEST(LlvmLibcSchedCpuCountTest, SmokeTest) { |
| cpu_set_t mask; |
| libc_errno = 0; |
| using __llvm_libc::testing::ErrnoSetterMatcher::Succeeds; |
| pid_t tid = __llvm_libc::syscall_impl(SYS_gettid); |
| ASSERT_GT(tid, pid_t(0)); |
| ASSERT_THAT(__llvm_libc::sched_getaffinity(tid, sizeof(cpu_set_t), &mask), |
| Succeeds(0)); |
| |
| // CPU_COUNT is a macro, but it expands to an LLVM-libc internal function that |
| // needs to be in the appropriate namespace for the test. |
| int num_cpus = __llvm_libc::CPU_COUNT(&mask); |
| ASSERT_GT(num_cpus, 0); |
| ASSERT_LE(num_cpus, int(sizeof(cpu_set_t) * sizeof(unsigned long))); |
| } |