From e6c57fcb05b0dcbfa8129bb6f7d99093f4819370 Mon Sep 17 00:00:00 2001 From: Elliott Hughes Date: Fri, 23 May 2014 20:06:03 -0700 Subject: [PATCH] Add C11 . Bug: 14903517 Change-Id: I631dbfdaa698cf7fea8e3b5e18a32586383e62a5 --- libc/include/stdatomic.h | 420 +++++++++++++++++++++++++++++++++++++++ libc/include/sys/cdefs.h | 18 ++ tests/Android.mk | 1 + tests/stdatomic_test.cpp | 165 +++++++++++++++ 4 files changed, 604 insertions(+) create mode 100644 libc/include/stdatomic.h create mode 100644 tests/stdatomic_test.cpp diff --git a/libc/include/stdatomic.h b/libc/include/stdatomic.h new file mode 100644 index 000000000..43ec7534b --- /dev/null +++ b/libc/include/stdatomic.h @@ -0,0 +1,420 @@ +/*- + * Copyright (c) 2011 Ed Schouten + * David Chisnall + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ + +#ifndef _STDATOMIC_H_ +#define _STDATOMIC_H_ + +#include +#include +#include + +#if __has_extension(c_atomic) || __has_extension(cxx_atomic) +#define __CLANG_ATOMICS +#elif __GNUC_PREREQ__(4, 7) +#define __GNUC_ATOMICS +#elif defined(__GNUC__) +#define __SYNC_ATOMICS +#else +#error "stdatomic.h does not support your compiler" +#endif + +/* + * 7.17.1 Atomic lock-free macros. + */ + +#ifdef __GCC_ATOMIC_BOOL_LOCK_FREE +#define ATOMIC_BOOL_LOCK_FREE __GCC_ATOMIC_BOOL_LOCK_FREE +#endif +#ifdef __GCC_ATOMIC_CHAR_LOCK_FREE +#define ATOMIC_CHAR_LOCK_FREE __GCC_ATOMIC_CHAR_LOCK_FREE +#endif +#ifdef __GCC_ATOMIC_CHAR16_T_LOCK_FREE +#define ATOMIC_CHAR16_T_LOCK_FREE __GCC_ATOMIC_CHAR16_T_LOCK_FREE +#endif +#ifdef __GCC_ATOMIC_CHAR32_T_LOCK_FREE +#define ATOMIC_CHAR32_T_LOCK_FREE __GCC_ATOMIC_CHAR32_T_LOCK_FREE +#endif +#ifdef __GCC_ATOMIC_WCHAR_T_LOCK_FREE +#define ATOMIC_WCHAR_T_LOCK_FREE __GCC_ATOMIC_WCHAR_T_LOCK_FREE +#endif +#ifdef __GCC_ATOMIC_SHORT_LOCK_FREE +#define ATOMIC_SHORT_LOCK_FREE __GCC_ATOMIC_SHORT_LOCK_FREE +#endif +#ifdef __GCC_ATOMIC_INT_LOCK_FREE +#define ATOMIC_INT_LOCK_FREE __GCC_ATOMIC_INT_LOCK_FREE +#endif +#ifdef __GCC_ATOMIC_LONG_LOCK_FREE +#define ATOMIC_LONG_LOCK_FREE __GCC_ATOMIC_LONG_LOCK_FREE +#endif +#ifdef __GCC_ATOMIC_LLONG_LOCK_FREE +#define ATOMIC_LLONG_LOCK_FREE __GCC_ATOMIC_LLONG_LOCK_FREE +#endif +#ifdef __GCC_ATOMIC_POINTER_LOCK_FREE +#define ATOMIC_POINTER_LOCK_FREE __GCC_ATOMIC_POINTER_LOCK_FREE +#endif + +/* + * 7.17.2 Initialization. + */ + +#if defined(__CLANG_ATOMICS) +#define ATOMIC_VAR_INIT(value) (value) +#define atomic_init(obj, value) __c11_atomic_init(obj, value) +#else +#define ATOMIC_VAR_INIT(value) { .__val = (value) } +#define atomic_init(obj, value) ((void)((obj)->__val = (value))) +#endif + +/* + * Clang and recent GCC both provide predefined macros for the memory + * orderings. If we are using a compiler that doesn't define them, use the + * clang values - these will be ignored in the fallback path. + */ + +#ifndef __ATOMIC_RELAXED +#define __ATOMIC_RELAXED 0 +#endif +#ifndef __ATOMIC_CONSUME +#define __ATOMIC_CONSUME 1 +#endif +#ifndef __ATOMIC_ACQUIRE +#define __ATOMIC_ACQUIRE 2 +#endif +#ifndef __ATOMIC_RELEASE +#define __ATOMIC_RELEASE 3 +#endif +#ifndef __ATOMIC_ACQ_REL +#define __ATOMIC_ACQ_REL 4 +#endif +#ifndef __ATOMIC_SEQ_CST +#define __ATOMIC_SEQ_CST 5 +#endif + +/* + * 7.17.3 Order and consistency. + * + * The memory_order_* constants that denote the barrier behaviour of the + * atomic operations. + */ + +typedef enum { + memory_order_relaxed = __ATOMIC_RELAXED, + memory_order_consume = __ATOMIC_CONSUME, + memory_order_acquire = __ATOMIC_ACQUIRE, + memory_order_release = __ATOMIC_RELEASE, + memory_order_acq_rel = __ATOMIC_ACQ_REL, + memory_order_seq_cst = __ATOMIC_SEQ_CST +} memory_order; + +/* + * 7.17.4 Fences. + */ + +static __inline void +atomic_thread_fence(memory_order __order __unused) +{ + +#ifdef __CLANG_ATOMICS + __c11_atomic_thread_fence(__order); +#elif defined(__GNUC_ATOMICS) + __atomic_thread_fence(__order); +#else + __sync_synchronize(); +#endif +} + +static __inline void +atomic_signal_fence(memory_order __order __unused) +{ + +#ifdef __CLANG_ATOMICS + __c11_atomic_signal_fence(__order); +#elif defined(__GNUC_ATOMICS) + __atomic_signal_fence(__order); +#else + __asm volatile ("" ::: "memory"); +#endif +} + +/* + * 7.17.5 Lock-free property. + */ + +#if defined(_KERNEL) +/* Atomics in kernelspace are always lock-free. */ +#define atomic_is_lock_free(obj) \ + ((void)(obj), (_Bool)1) +#elif defined(__CLANG_ATOMICS) +#define atomic_is_lock_free(obj) \ + __atomic_is_lock_free(sizeof(*(obj)), obj) +#elif defined(__GNUC_ATOMICS) +#define atomic_is_lock_free(obj) \ + __atomic_is_lock_free(sizeof((obj)->__val), &(obj)->__val) +#else +#define atomic_is_lock_free(obj) \ + ((void)(obj), sizeof((obj)->__val) <= sizeof(void *)) +#endif + +/* + * 7.17.6 Atomic integer types. + */ + +#if !__has_extension(c_atomic) && !__has_extension(cxx_atomic) +/* + * No native support for _Atomic(). Place object in structure to prevent + * most forms of direct non-atomic access. + */ +#define _Atomic(T) struct { T volatile __val; } +#endif + +typedef _Atomic(bool) atomic_bool; +typedef _Atomic(char) atomic_char; +typedef _Atomic(signed char) atomic_schar; +typedef _Atomic(unsigned char) atomic_uchar; +typedef _Atomic(short) atomic_short; +typedef _Atomic(unsigned short) atomic_ushort; +typedef _Atomic(int) atomic_int; +typedef _Atomic(unsigned int) atomic_uint; +typedef _Atomic(long) atomic_long; +typedef _Atomic(unsigned long) atomic_ulong; +typedef _Atomic(long long) atomic_llong; +typedef _Atomic(unsigned long long) atomic_ullong; +typedef _Atomic(char16_t) atomic_char16_t; +typedef _Atomic(char32_t) atomic_char32_t; +typedef _Atomic(wchar_t) atomic_wchar_t; +typedef _Atomic(int_least8_t) atomic_int_least8_t; +typedef _Atomic(uint_least8_t) atomic_uint_least8_t; +typedef _Atomic(int_least16_t) atomic_int_least16_t; +typedef _Atomic(uint_least16_t) atomic_uint_least16_t; +typedef _Atomic(int_least32_t) atomic_int_least32_t; +typedef _Atomic(uint_least32_t) atomic_uint_least32_t; +typedef _Atomic(int_least64_t) atomic_int_least64_t; +typedef _Atomic(uint_least64_t) atomic_uint_least64_t; +typedef _Atomic(int_fast8_t) atomic_int_fast8_t; +typedef _Atomic(uint_fast8_t) atomic_uint_fast8_t; +typedef _Atomic(int_fast16_t) atomic_int_fast16_t; +typedef _Atomic(uint_fast16_t) atomic_uint_fast16_t; +typedef _Atomic(int_fast32_t) atomic_int_fast32_t; +typedef _Atomic(uint_fast32_t) atomic_uint_fast32_t; +typedef _Atomic(int_fast64_t) atomic_int_fast64_t; +typedef _Atomic(uint_fast64_t) atomic_uint_fast64_t; +typedef _Atomic(intptr_t) atomic_intptr_t; +typedef _Atomic(uintptr_t) atomic_uintptr_t; +typedef _Atomic(size_t) atomic_size_t; +typedef _Atomic(ptrdiff_t) atomic_ptrdiff_t; +typedef _Atomic(intmax_t) atomic_intmax_t; +typedef _Atomic(uintmax_t) atomic_uintmax_t; + +/* + * 7.17.7 Operations on atomic types. + */ + +/* + * Compiler-specific operations. + */ + +#if defined(__CLANG_ATOMICS) +#define atomic_compare_exchange_strong_explicit(object, expected, \ + desired, success, failure) \ + __c11_atomic_compare_exchange_strong(object, expected, desired, \ + success, failure) +#define atomic_compare_exchange_weak_explicit(object, expected, \ + desired, success, failure) \ + __c11_atomic_compare_exchange_weak(object, expected, desired, \ + success, failure) +#define atomic_exchange_explicit(object, desired, order) \ + __c11_atomic_exchange(object, desired, order) +#define atomic_fetch_add_explicit(object, operand, order) \ + __c11_atomic_fetch_add(object, operand, order) +#define atomic_fetch_and_explicit(object, operand, order) \ + __c11_atomic_fetch_and(object, operand, order) +#define atomic_fetch_or_explicit(object, operand, order) \ + __c11_atomic_fetch_or(object, operand, order) +#define atomic_fetch_sub_explicit(object, operand, order) \ + __c11_atomic_fetch_sub(object, operand, order) +#define atomic_fetch_xor_explicit(object, operand, order) \ + __c11_atomic_fetch_xor(object, operand, order) +#define atomic_load_explicit(object, order) \ + __c11_atomic_load(object, order) +#define atomic_store_explicit(object, desired, order) \ + __c11_atomic_store(object, desired, order) +#elif defined(__GNUC_ATOMICS) +#define atomic_compare_exchange_strong_explicit(object, expected, \ + desired, success, failure) \ + __atomic_compare_exchange_n(&(object)->__val, expected, \ + desired, 0, success, failure) +#define atomic_compare_exchange_weak_explicit(object, expected, \ + desired, success, failure) \ + __atomic_compare_exchange_n(&(object)->__val, expected, \ + desired, 1, success, failure) +#define atomic_exchange_explicit(object, desired, order) \ + __atomic_exchange_n(&(object)->__val, desired, order) +#define atomic_fetch_add_explicit(object, operand, order) \ + __atomic_fetch_add(&(object)->__val, operand, order) +#define atomic_fetch_and_explicit(object, operand, order) \ + __atomic_fetch_and(&(object)->__val, operand, order) +#define atomic_fetch_or_explicit(object, operand, order) \ + __atomic_fetch_or(&(object)->__val, operand, order) +#define atomic_fetch_sub_explicit(object, operand, order) \ + __atomic_fetch_sub(&(object)->__val, operand, order) +#define atomic_fetch_xor_explicit(object, operand, order) \ + __atomic_fetch_xor(&(object)->__val, operand, order) +#define atomic_load_explicit(object, order) \ + __atomic_load_n(&(object)->__val, order) +#define atomic_store_explicit(object, desired, order) \ + __atomic_store_n(&(object)->__val, desired, order) +#else +#define __atomic_apply_stride(object, operand) \ + (((__typeof__((object)->__val))0) + (operand)) +#define atomic_compare_exchange_strong_explicit(object, expected, \ + desired, success, failure) __extension__ ({ \ + __typeof__(expected) __ep = (expected); \ + __typeof__(*__ep) __e = *__ep; \ + (void)(success); (void)(failure); \ + (bool)((*__ep = __sync_val_compare_and_swap(&(object)->__val, \ + __e, desired)) == __e); \ +}) +#define atomic_compare_exchange_weak_explicit(object, expected, \ + desired, success, failure) \ + atomic_compare_exchange_strong_explicit(object, expected, \ + desired, success, failure) +#if __has_builtin(__sync_swap) +/* Clang provides a full-barrier atomic exchange - use it if available. */ +#define atomic_exchange_explicit(object, desired, order) \ + ((void)(order), __sync_swap(&(object)->__val, desired)) +#else +/* + * __sync_lock_test_and_set() is only an acquire barrier in theory (although in + * practice it is usually a full barrier) so we need an explicit barrier before + * it. + */ +#define atomic_exchange_explicit(object, desired, order) \ +__extension__ ({ \ + __typeof__(object) __o = (object); \ + __typeof__(desired) __d = (desired); \ + (void)(order); \ + __sync_synchronize(); \ + __sync_lock_test_and_set(&(__o)->__val, __d); \ +}) +#endif +#define atomic_fetch_add_explicit(object, operand, order) \ + ((void)(order), __sync_fetch_and_add(&(object)->__val, \ + __atomic_apply_stride(object, operand))) +#define atomic_fetch_and_explicit(object, operand, order) \ + ((void)(order), __sync_fetch_and_and(&(object)->__val, operand)) +#define atomic_fetch_or_explicit(object, operand, order) \ + ((void)(order), __sync_fetch_and_or(&(object)->__val, operand)) +#define atomic_fetch_sub_explicit(object, operand, order) \ + ((void)(order), __sync_fetch_and_sub(&(object)->__val, \ + __atomic_apply_stride(object, operand))) +#define atomic_fetch_xor_explicit(object, operand, order) \ + ((void)(order), __sync_fetch_and_xor(&(object)->__val, operand)) +#define atomic_load_explicit(object, order) \ + ((void)(order), __sync_fetch_and_add(&(object)->__val, 0)) +#define atomic_store_explicit(object, desired, order) \ + ((void)atomic_exchange_explicit(object, desired, order)) +#endif + +/* + * Convenience functions. + * + * Don't provide these in kernel space. In kernel space, we should be + * disciplined enough to always provide explicit barriers. + */ + +#ifndef _KERNEL +#define atomic_compare_exchange_strong(object, expected, desired) \ + atomic_compare_exchange_strong_explicit(object, expected, \ + desired, memory_order_seq_cst, memory_order_seq_cst) +#define atomic_compare_exchange_weak(object, expected, desired) \ + atomic_compare_exchange_weak_explicit(object, expected, \ + desired, memory_order_seq_cst, memory_order_seq_cst) +#define atomic_exchange(object, desired) \ + atomic_exchange_explicit(object, desired, memory_order_seq_cst) +#define atomic_fetch_add(object, operand) \ + atomic_fetch_add_explicit(object, operand, memory_order_seq_cst) +#define atomic_fetch_and(object, operand) \ + atomic_fetch_and_explicit(object, operand, memory_order_seq_cst) +#define atomic_fetch_or(object, operand) \ + atomic_fetch_or_explicit(object, operand, memory_order_seq_cst) +#define atomic_fetch_sub(object, operand) \ + atomic_fetch_sub_explicit(object, operand, memory_order_seq_cst) +#define atomic_fetch_xor(object, operand) \ + atomic_fetch_xor_explicit(object, operand, memory_order_seq_cst) +#define atomic_load(object) \ + atomic_load_explicit(object, memory_order_seq_cst) +#define atomic_store(object, desired) \ + atomic_store_explicit(object, desired, memory_order_seq_cst) +#endif /* !_KERNEL */ + +/* + * 7.17.8 Atomic flag type and operations. + * + * XXX: Assume atomic_bool can be used as an atomic_flag. Is there some + * kind of compiler built-in type we could use? + */ + +typedef struct { + atomic_bool __flag; +} atomic_flag; + +#define ATOMIC_FLAG_INIT { ATOMIC_VAR_INIT(0) } + +static __inline bool +atomic_flag_test_and_set_explicit(volatile atomic_flag *__object, + memory_order __order) +{ + return (atomic_exchange_explicit(&__object->__flag, 1, __order)); +} + +static __inline void +atomic_flag_clear_explicit(volatile atomic_flag *__object, memory_order __order) +{ + + atomic_store_explicit(&__object->__flag, 0, __order); +} + +#ifndef _KERNEL +static __inline bool +atomic_flag_test_and_set(volatile atomic_flag *__object) +{ + + return (atomic_flag_test_and_set_explicit(__object, + memory_order_seq_cst)); +} + +static __inline void +atomic_flag_clear(volatile atomic_flag *__object) +{ + + atomic_flag_clear_explicit(__object, memory_order_seq_cst); +} +#endif /* !_KERNEL */ + +#endif /* !_STDATOMIC_H_ */ diff --git a/libc/include/sys/cdefs.h b/libc/include/sys/cdefs.h index 685de32c9..028661628 100644 --- a/libc/include/sys/cdefs.h +++ b/libc/include/sys/cdefs.h @@ -37,6 +37,24 @@ #ifndef _SYS_CDEFS_H_ #define _SYS_CDEFS_H_ +/* + * Testing against Clang-specific extensions. + */ + +#ifndef __has_extension +#define __has_extension __has_feature +#endif +#ifndef __has_feature +#define __has_feature(x) 0 +#endif +#ifndef __has_include +#define __has_include(x) 0 +#endif +#ifndef __has_builtin +#define __has_builtin(x) 0 +#endif + + /* * Macro to test if we're using a GNU C compiler of a specific vintage * or later, for e.g. features that appeared in a particular version diff --git a/tests/Android.mk b/tests/Android.mk index 37aeec3b0..d753acc38 100644 --- a/tests/Android.mk +++ b/tests/Android.mk @@ -87,6 +87,7 @@ libBionicStandardTests_src_files := \ stack_protector_test.cpp \ stack_unwinding_test.cpp \ stack_unwinding_test_impl.c \ + stdatomic_test.cpp \ stdint_test.cpp \ stdio_test.cpp \ stdlib_test.cpp \ diff --git a/tests/stdatomic_test.cpp b/tests/stdatomic_test.cpp new file mode 100644 index 000000000..44f5c7bdc --- /dev/null +++ b/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 + +#if !defined(__GLIBC__) /* TODO: fix our prebuilt toolchains! */ + +#include + +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