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/**************************************************************************/
/* */
/* OCaml */
/* */
/* KC Sivaramakrishnan, Indian Institute of Technology, Madras */
/* Stephen Dolan, University of Cambridge */
/* */
/* Copyright 2018 Indian Institute of Technology, Madras */
/* Copyright 2018 University of Cambridge */
/* */
/* All rights reserved. This file is distributed under the terms of */
/* the GNU Lesser General Public License version 2.1, with the */
/* special exception on linking described in the file LICENSE. */
/* */
/**************************************************************************/
#ifndef CAML_ATOMIC_H
#define CAML_ATOMIC_H
#include "config.h"
/*
* C11 atomics types and utility macros.
*/
#ifdef __cplusplus
extern "C++" {
#include <atomic>
typedef std::atomic<uintnat> atomic_uintnat;
typedef std::atomic<intnat> atomic_intnat;
using std::memory_order_relaxed;
using std::memory_order_acquire;
using std::memory_order_release;
using std::memory_order_acq_rel;
using std::memory_order_seq_cst;
}
#else
#include <stdatomic.h>
typedef _Atomic uintnat atomic_uintnat;
typedef _Atomic intnat atomic_intnat;
#endif
#ifdef CAML_INTERNALS
/* Loads and stores with acquire, release and relaxed semantics */
#define atomic_load_acquire(p) \
atomic_load_explicit((p), memory_order_acquire)
#define atomic_load_relaxed(p) \
atomic_load_explicit((p), memory_order_relaxed)
#define atomic_store_release(p, v) \
atomic_store_explicit((p), (v), memory_order_release)
#define atomic_store_relaxed(p, v) \
atomic_store_explicit((p), (v), memory_order_relaxed)
#endif /* CAML_INTERNALS */
#endif /* CAML_ATOMIC_H */
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