Add C11 <stdatomic.h>.

Bug: 14903517
Change-Id: I631dbfdaa698cf7fea8e3b5e18a32586383e62a5

tests/stdatomic_test.cpp

@@ -0,0 +1,165 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <gtest/gtest.h>
+
+#if !defined(__GLIBC__) /* TODO: fix our prebuilt toolchains! */
+
+#include <stdatomic.h>
+
+TEST(stdatomic, LOCK_FREE) {
+  ASSERT_TRUE(ATOMIC_BOOL_LOCK_FREE);
+  ASSERT_TRUE(ATOMIC_CHAR16_T_LOCK_FREE);
+  ASSERT_TRUE(ATOMIC_CHAR32_T_LOCK_FREE);
+  ASSERT_TRUE(ATOMIC_CHAR_LOCK_FREE);
+  ASSERT_TRUE(ATOMIC_INT_LOCK_FREE);
+  ASSERT_TRUE(ATOMIC_LLONG_LOCK_FREE);
+  ASSERT_TRUE(ATOMIC_LONG_LOCK_FREE);
+  ASSERT_TRUE(ATOMIC_POINTER_LOCK_FREE);
+  ASSERT_TRUE(ATOMIC_SHORT_LOCK_FREE);
+  ASSERT_TRUE(ATOMIC_WCHAR_T_LOCK_FREE);
+}
+
+TEST(stdatomic, init) {
+  atomic_int v = ATOMIC_VAR_INIT(123);
+  ASSERT_EQ(123, atomic_load(&v));
+
+  atomic_init(&v, 456);
+  ASSERT_EQ(456, atomic_load(&v));
+
+  atomic_flag f = ATOMIC_FLAG_INIT;
+  ASSERT_FALSE(atomic_flag_test_and_set(&f));
+}
+
+TEST(stdatomic, atomic_thread_fence) {
+  atomic_thread_fence(memory_order_relaxed);
+  atomic_thread_fence(memory_order_consume);
+  atomic_thread_fence(memory_order_acquire);
+  atomic_thread_fence(memory_order_release);
+  atomic_thread_fence(memory_order_acq_rel);
+  atomic_thread_fence(memory_order_seq_cst);
+}
+
+TEST(stdatomic, atomic_signal_fence) {
+  atomic_signal_fence(memory_order_relaxed);
+  atomic_signal_fence(memory_order_consume);
+  atomic_signal_fence(memory_order_acquire);
+  atomic_signal_fence(memory_order_release);
+  atomic_signal_fence(memory_order_acq_rel);
+  atomic_signal_fence(memory_order_seq_cst);
+}
+
+TEST(stdatomic, atomic_is_lock_free) {
+  atomic_char small;
+  atomic_intmax_t big;
+  ASSERT_TRUE(atomic_is_lock_free(&small));
+  ASSERT_TRUE(atomic_is_lock_free(&big));
+}
+
+TEST(stdatomic, atomic_flag) {
+  atomic_flag f = ATOMIC_FLAG_INIT;
+  ASSERT_FALSE(atomic_flag_test_and_set(&f));
+  ASSERT_TRUE(atomic_flag_test_and_set(&f));
+
+  atomic_flag_clear(&f);
+
+  ASSERT_FALSE(atomic_flag_test_and_set_explicit(&f, memory_order_relaxed));
+  ASSERT_TRUE(atomic_flag_test_and_set_explicit(&f, memory_order_relaxed));
+
+  atomic_flag_clear_explicit(&f, memory_order_relaxed);
+  ASSERT_FALSE(atomic_flag_test_and_set_explicit(&f, memory_order_relaxed));
+}
+
+TEST(stdatomic, atomic_store) {
+  atomic_int i;
+  atomic_store(&i, 123);
+  ASSERT_EQ(123, atomic_load(&i));
+  atomic_store_explicit(&i, 123, memory_order_relaxed);
+  ASSERT_EQ(123, atomic_load_explicit(&i, memory_order_relaxed));
+}
+
+TEST(stdatomic, atomic_exchange) {
+  atomic_int i;
+  atomic_store(&i, 123);
+  ASSERT_EQ(123, atomic_exchange(&i, 456));
+  ASSERT_EQ(456, atomic_exchange_explicit(&i, 123, memory_order_relaxed));
+}
+
+TEST(stdatomic, atomic_compare_exchange) {
+  atomic_int i;
+  atomic_int expected;
+
+  atomic_store(&i, 123);
+  atomic_store(&expected, 123);
+  ASSERT_TRUE(atomic_compare_exchange_strong(&i, &expected, 456));
+  ASSERT_FALSE(atomic_compare_exchange_strong(&i, &expected, 456));
+  ASSERT_EQ(456, atomic_load(&expected));
+
+  atomic_store(&i, 123);
+  atomic_store(&expected, 123);
+  ASSERT_TRUE(atomic_compare_exchange_strong_explicit(&i, &expected, 456, memory_order_relaxed, memory_order_relaxed));
+  ASSERT_FALSE(atomic_compare_exchange_strong_explicit(&i, &expected, 456, memory_order_relaxed, memory_order_relaxed));
+  ASSERT_EQ(456, atomic_load(&expected));
+
+  atomic_store(&i, 123);
+  atomic_store(&expected, 123);
+  ASSERT_TRUE(atomic_compare_exchange_weak(&i, &expected, 456));
+  ASSERT_FALSE(atomic_compare_exchange_weak(&i, &expected, 456));
+  ASSERT_EQ(456, atomic_load(&expected));
+
+  atomic_store(&i, 123);
+  atomic_store(&expected, 123);
+  ASSERT_TRUE(atomic_compare_exchange_weak_explicit(&i, &expected, 456, memory_order_relaxed, memory_order_relaxed));
+  ASSERT_FALSE(atomic_compare_exchange_weak_explicit(&i, &expected, 456, memory_order_relaxed, memory_order_relaxed));
+  ASSERT_EQ(456, atomic_load(&expected));
+}
+
+TEST(stdatomic, atomic_fetch_add) {
+  atomic_int i = ATOMIC_VAR_INIT(123);
+  ASSERT_EQ(123, atomic_fetch_add(&i, 1));
+  ASSERT_EQ(124, atomic_fetch_add_explicit(&i, 1, memory_order_relaxed));
+  ASSERT_EQ(125, atomic_load(&i));
+}
+
+TEST(stdatomic, atomic_fetch_sub) {
+  atomic_int i = ATOMIC_VAR_INIT(123);
+  ASSERT_EQ(123, atomic_fetch_sub(&i, 1));
+  ASSERT_EQ(122, atomic_fetch_sub_explicit(&i, 1, memory_order_relaxed));
+  ASSERT_EQ(121, atomic_load(&i));
+}
+
+TEST(stdatomic, atomic_fetch_or) {
+  atomic_int i = ATOMIC_VAR_INIT(0x100);
+  ASSERT_EQ(0x100, atomic_fetch_or(&i, 0x020));
+  ASSERT_EQ(0x120, atomic_fetch_or_explicit(&i, 0x003, memory_order_relaxed));
+  ASSERT_EQ(0x123, atomic_load(&i));
+}
+
+TEST(stdatomic, atomic_fetch_xor) {
+  atomic_int i = ATOMIC_VAR_INIT(0x100);
+  ASSERT_EQ(0x100, atomic_fetch_xor(&i, 0x120));
+  ASSERT_EQ(0x020, atomic_fetch_xor_explicit(&i, 0x103, memory_order_relaxed));
+  ASSERT_EQ(0x123, atomic_load(&i));
+}
+
+TEST(stdatomic, atomic_fetch_and) {
+  atomic_int i = ATOMIC_VAR_INIT(0x123);
+  ASSERT_EQ(0x123, atomic_fetch_and(&i, 0x00f));
+  ASSERT_EQ(0x003, atomic_fetch_and_explicit(&i, 0x2, memory_order_relaxed));
+  ASSERT_EQ(0x002, atomic_load(&i));
+}
+
+#endif