| //===-- Unittests for Atomic ----------------------------------------------===// |
| // |
| // 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/CPP/atomic.h" |
| #include "utils/UnitTest/Test.h" |
| |
| // Tests in this file do not test atomicity as it would require using |
| // threads, at which point it becomes a chicken and egg problem. |
| |
| TEST(LlvmLibcAtomicTest, LoadStore) { |
| __llvm_libc::cpp::Atomic<int> aint(123); |
| ASSERT_EQ(aint.load(), 123); |
| |
| aint.store(100); |
| ASSERT_EQ(aint.load(), 100); |
| |
| aint = 1234; // Equivalent of store |
| ASSERT_EQ(aint.load(), 1234); |
| } |
| |
| TEST(LlvmLibcAtomicTest, CompareExchangeStrong) { |
| int desired = 123; |
| __llvm_libc::cpp::Atomic<int> aint(desired); |
| ASSERT_TRUE(aint.compare_exchange_strong(desired, 100)); |
| ASSERT_EQ(aint.load(), 100); |
| |
| ASSERT_FALSE(aint.compare_exchange_strong(desired, 100)); |
| ASSERT_EQ(aint.load(), 100); |
| } |