add stdatomic compatability header for older gcc and clang versions
This commit is contained in:
William Woodall
parent
5c07b9eec3
commit
4ccaefb602
2 changed files with 401 additions and 0 deletions
|
|
@ -17,7 +17,15 @@
|
|||
|
||||
#if !defined(WIN32)
|
||||
|
||||
#if defined(__GNUC__) && __GNUC__ <= 4 && __GNUC_MINOR__ <= 9
|
||||
// If GCC and below GCC-4.9, use the compatability header.
|
||||
#include "stdatomic_helper/gcc/stdatomic.h"
|
||||
#elif defined(__clang__) && defined(__has_feature) && !__has_feature(c_atomic)
|
||||
// If Clang and no c_atomics (true for some older versions), use the compatability header.
|
||||
#include "stdatomic_helper/gcc/stdatomic.h"
|
||||
#else
|
||||
#include <stdatomic.h>
|
||||
#endif
|
||||
|
||||
#define rcl_atomic_load(object, out) (out) = atomic_load(object)
|
||||
|
||||
|
|
|
|||
393
rcl/src/rcl/stdatomic_helper/gcc/stdatomic.h
Normal file
393
rcl/src/rcl/stdatomic_helper/gcc/stdatomic.h
Normal file
|
|
@ -0,0 +1,393 @@
|
|||
// Copyright 2015 Open Source Robotics Foundation, Inc.
|
||||
//
|
||||
// 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.
|
||||
|
||||
/* This file was taken from:
|
||||
* https://gist.github.com/nhatminhle/5181506
|
||||
* It is a modification of the FreeBSD stdatomic header with some modifications
|
||||
* so that it will work with gcc 4.7+ and Clang 3.1+.
|
||||
* The original FreeBSD header can be found here:
|
||||
* https://github.com/freebsd/freebsd/blob/release/10.2.0/sys/sys/stdatomic.h
|
||||
*/
|
||||
|
||||
/**** Start included file. ****/
|
||||
|
||||
/*
|
||||
* An implementation of C11 stdatomic.h directly borrowed from FreeBSD
|
||||
* (original copyright follows), with minor modifications for
|
||||
* portability to other systems. Works for recent Clang (that
|
||||
* implement the feature c_atomic) and GCC 4.7+; includes
|
||||
* compatibility for GCC below 4.7 but I wouldn't recommend it.
|
||||
*
|
||||
* Caveats and limitations:
|
||||
* - Only the ``_Atomic parentheses'' notation is implemented, while
|
||||
* the ``_Atomic space'' one is not.
|
||||
* - _Atomic types must be typedef'ed, or programs using them will
|
||||
* not type check correctly (incompatible anonymous structure
|
||||
* types).
|
||||
* - Non-scalar _Atomic types would require runtime support for
|
||||
* runtime locking, which, as far as I know, is not currently
|
||||
* available on any system.
|
||||
*/
|
||||
|
||||
/*-
|
||||
* Copyright (c) 2011 Ed Schouten <ed@FreeBSD.org>
|
||||
* David Chisnall <theraven@FreeBSD.org>
|
||||
* 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: src/include/stdatomic.h,v 1.10.2.2 2012/05/30 19:21:54 theraven Exp $
|
||||
*/
|
||||
|
||||
#ifndef _STDATOMIC_H_
|
||||
#define _STDATOMIC_H_
|
||||
|
||||
#include <stddef.h>
|
||||
#include <stdint.h>
|
||||
|
||||
#if !defined(__has_feature)
|
||||
#define __has_feature(x) 0
|
||||
#endif
|
||||
#if !defined(__has_builtin)
|
||||
#define __has_builtin(x) 0
|
||||
#endif
|
||||
#if !defined(__GNUC_PREREQ__)
|
||||
#if defined(__GNUC__) && defined(__GNUC_MINOR__)
|
||||
#define __GNUC_PREREQ__(maj, min) \
|
||||
((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
|
||||
#else
|
||||
#define __GNUC_PREREQ__(maj, min) 0
|
||||
#endif
|
||||
#endif
|
||||
|
||||
#if !defined(__CLANG_ATOMICS) && !defined(__GNUC_ATOMICS)
|
||||
#if __has_feature(c_atomic)
|
||||
#define __CLANG_ATOMICS
|
||||
#elif __GNUC_PREREQ__(4, 7)
|
||||
#define __GNUC_ATOMICS
|
||||
#elif !defined(__GNUC__)
|
||||
#error "stdatomic.h does not support your compiler"
|
||||
#endif
|
||||
#endif
|
||||
|
||||
#if !defined(__CLANG_ATOMICS)
|
||||
#define _Atomic(T) struct { volatile __typeof__(T) __val; }
|
||||
#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) do { \
|
||||
(obj)->__val = (value); \
|
||||
} while (0)
|
||||
#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.
|
||||
*/
|
||||
|
||||
enum memory_order {
|
||||
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
|
||||
};
|
||||
|
||||
typedef enum memory_order memory_order;
|
||||
|
||||
/*
|
||||
* 7.17.4 Fences.
|
||||
*/
|
||||
|
||||
#ifdef __CLANG_ATOMICS
|
||||
#define atomic_thread_fence(order) __c11_atomic_thread_fence(order)
|
||||
#define atomic_signal_fence(order) __c11_atomic_signal_fence(order)
|
||||
#elif defined(__GNUC_ATOMICS)
|
||||
#define atomic_thread_fence(order) __atomic_thread_fence(order)
|
||||
#define atomic_signal_fence(order) __atomic_signal_fence(order)
|
||||
#else
|
||||
#define atomic_thread_fence(order) __sync_synchronize()
|
||||
#define atomic_signal_fence(order) __asm volatile ("" : : : "memory")
|
||||
#endif
|
||||
|
||||
/*
|
||||
* 7.17.5 Lock-free property.
|
||||
*/
|
||||
|
||||
#if defined(__CLANG_ATOMICS)
|
||||
#define atomic_is_lock_free(obj) \
|
||||
__c11_atomic_is_lock_free(sizeof(obj))
|
||||
#elif defined(__GNUC_ATOMICS)
|
||||
#define atomic_is_lock_free(obj) \
|
||||
__atomic_is_lock_free(sizeof((obj)->__val))
|
||||
#else
|
||||
#define atomic_is_lock_free(obj) \
|
||||
(sizeof((obj)->__val) <= sizeof(void *))
|
||||
#endif
|
||||
|
||||
/*
|
||||
* 7.17.6 Atomic integer types.
|
||||
*/
|
||||
|
||||
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;
|
||||
#if 0
|
||||
typedef _Atomic(char16_t) atomic_char16_t;
|
||||
typedef _Atomic(char32_t) atomic_char32_t;
|
||||
#endif
|
||||
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_compare_exchange_strong_explicit(object, expected, \
|
||||
desired, success, failure) ({ \
|
||||
__typeof__((object)->__val) __v; \
|
||||
_Bool __r; \
|
||||
__v = __sync_val_compare_and_swap(&(object)->__val, \
|
||||
*(expected), desired); \
|
||||
__r = *(expected) == __v; \
|
||||
*(expected) = __v; \
|
||||
__r; \
|
||||
})
|
||||
|
||||
#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) \
|
||||
__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 after
|
||||
* it.
|
||||
*/
|
||||
#define atomic_exchange_explicit(object, desired, order) ({ \
|
||||
__typeof__((object)->__val) __v; \
|
||||
__v = __sync_lock_test_and_set(&(object)->__val, desired); \
|
||||
__sync_synchronize(); \
|
||||
__v; \
|
||||
})
|
||||
#endif
|
||||
#define atomic_fetch_add_explicit(object, operand, order) \
|
||||
__sync_fetch_and_add(&(object)->__val, operand)
|
||||
#define atomic_fetch_and_explicit(object, operand, order) \
|
||||
__sync_fetch_and_and(&(object)->__val, operand)
|
||||
#define atomic_fetch_or_explicit(object, operand, order) \
|
||||
__sync_fetch_and_or(&(object)->__val, operand)
|
||||
#define atomic_fetch_sub_explicit(object, operand, order) \
|
||||
__sync_fetch_and_sub(&(object)->__val, operand)
|
||||
#define atomic_fetch_xor_explicit(object, operand, order) \
|
||||
__sync_fetch_and_xor(&(object)->__val, operand)
|
||||
#define atomic_load_explicit(object, order) \
|
||||
__sync_fetch_and_add(&(object)->__val, 0)
|
||||
#define atomic_store_explicit(object, desired, order) do { \
|
||||
__sync_synchronize(); \
|
||||
(object)->__val = (desired); \
|
||||
__sync_synchronize(); \
|
||||
} while (0)
|
||||
#endif
|
||||
|
||||
/*
|
||||
* Convenience functions.
|
||||
*/
|
||||
|
||||
#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)
|
||||
|
||||
/*
|
||||
* 7.17.8 Atomic flag type and operations.
|
||||
*/
|
||||
|
||||
typedef atomic_bool atomic_flag;
|
||||
|
||||
#define ATOMIC_FLAG_INIT ATOMIC_VAR_INIT(0)
|
||||
|
||||
#define atomic_flag_clear_explicit(object, order) \
|
||||
atomic_store_explicit(object, 0, order)
|
||||
#define atomic_flag_test_and_set_explicit(object, order) \
|
||||
atomic_compare_exchange_strong_explicit(object, 0, 1, order, order)
|
||||
|
||||
#define atomic_flag_clear(object) \
|
||||
atomic_flag_clear_explicit(object, memory_order_seq_cst)
|
||||
#define atomic_flag_test_and_set(object) \
|
||||
atomic_flag_test_and_set_explicit(object, memory_order_seq_cst)
|
||||
|
||||
#endif /* !_STDATOMIC_H_ */
|
||||
Loading…
Add table
Add a link
Reference in a new issue