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/**
* Copyright (c) 2013-2021 UChicago Argonne, LLC and The HDF Group.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#ifndef MERCURY_ATOMIC_H
#define MERCURY_ATOMIC_H
#include "mercury_util_config.h"
#if defined(_WIN32)
#define _WINSOCKAPI_
#include <windows.h>
typedef struct {
volatile LONG value;
} hg_atomic_int32_t;
typedef struct {
volatile LONGLONG value;
} hg_atomic_int64_t;
/* clang-format off */
# define HG_ATOMIC_VAR_INIT(x) {(x)}
/* clang-format on */
#elif defined(HG_UTIL_HAS_STDATOMIC_H)
#ifndef __cplusplus
#include <stdatomic.h>
typedef atomic_int hg_atomic_int32_t;
#if (HG_UTIL_ATOMIC_LONG_WIDTH == 8) && !defined(__APPLE__)
typedef atomic_long hg_atomic_int64_t;
#else
typedef atomic_llong hg_atomic_int64_t;
#endif
#else
#include <atomic>
typedef std::atomic_int hg_atomic_int32_t;
#if (HG_UTIL_ATOMIC_LONG_WIDTH == 8) && !defined(__APPLE__)
typedef std::atomic_long hg_atomic_int64_t;
#else
typedef std::atomic_llong hg_atomic_int64_t;
#endif
using std::atomic_fetch_add_explicit;
using std::atomic_thread_fence;
using std::memory_order_acq_rel;
using std::memory_order_acquire;
using std::memory_order_release;
#endif
#define HG_ATOMIC_VAR_INIT(x) ATOMIC_VAR_INIT(x)
#elif defined(__APPLE__)
#include <libkern/OSAtomic.h>
typedef struct {
volatile int32_t value;
} hg_atomic_int32_t;
typedef struct {
volatile int64_t value;
} hg_atomic_int64_t;
/* clang-format off */
# define HG_ATOMIC_VAR_INIT(x) {(x)}
/* clang-format on */
#else /* GCC 4.7 */
#if !defined(__GNUC__) || ((__GNUC__ < 4) && (__GNUC_MINOR__ < 7))
#error "GCC version >= 4.7 required to support built-in atomics."
#endif
/* builtins do not require volatile */
typedef int32_t hg_atomic_int32_t;
typedef int64_t hg_atomic_int64_t;
#define HG_ATOMIC_VAR_INIT(x) (x)
#endif
#ifdef __cplusplus
extern "C" {
#endif
/**
* Init atomic value (32-bit integer).
*
* \param ptr [OUT] pointer to an atomic32 integer
* \param value [IN] value
*/
static HG_UTIL_INLINE void hg_atomic_init32(hg_atomic_int32_t *ptr, int32_t value);
/**
* Set atomic value (32-bit integer).
*
* \param ptr [OUT] pointer to an atomic32 integer
* \param value [IN] value
*/
static HG_UTIL_INLINE void hg_atomic_set32(hg_atomic_int32_t *ptr, int32_t value);
/**
* Get atomic value (32-bit integer).
*
* \param ptr [OUT] pointer to an atomic32 integer
*
* \return Value of the atomic integer
*/
static HG_UTIL_INLINE int32_t hg_atomic_get32(hg_atomic_int32_t *ptr);
/**
* Increment atomic value (32-bit integer).
*
* \param ptr [IN/OUT] pointer to an atomic32 integer
*
* \return Incremented value
*/
static HG_UTIL_INLINE int32_t hg_atomic_incr32(hg_atomic_int32_t *ptr);
/**
* Decrement atomic value (32-bit integer).
*
* \param ptr [IN/OUT] pointer to an atomic32 integer
*
* \return Decremented value
*/
static HG_UTIL_INLINE int32_t hg_atomic_decr32(hg_atomic_int32_t *ptr);
/**
* OR atomic value (32-bit integer).
*
* \param ptr [IN/OUT] pointer to an atomic32 integer
* \param value [IN] value to OR with
*
* \return Original value
*/
static HG_UTIL_INLINE int32_t hg_atomic_or32(hg_atomic_int32_t *ptr, int32_t value);
/**
* XOR atomic value (32-bit integer).
*
* \param ptr [IN/OUT] pointer to an atomic32 integer
* \param value [IN] value to XOR with
*
* \return Original value
*/
static HG_UTIL_INLINE int32_t hg_atomic_xor32(hg_atomic_int32_t *ptr, int32_t value);
/**
* AND atomic value (32-bit integer).
*
* \param ptr [IN/OUT] pointer to an atomic32 integer
* \param value [IN] value to AND with
*
* \return Original value
*/
static HG_UTIL_INLINE int32_t hg_atomic_and32(hg_atomic_int32_t *ptr, int32_t value);
/**
* Compare and swap values (32-bit integer).
*
* \param ptr [IN/OUT] pointer to an atomic32 integer
* \param compare_value [IN] value to compare to
* \param swap_value [IN] value to swap with if ptr value is equal to
* compare value
*
* \return true if swapped or false
*/
static HG_UTIL_INLINE bool hg_atomic_cas32(hg_atomic_int32_t *ptr, int32_t compare_value, int32_t swap_value);
/**
* Init atomic value (64-bit integer).
*
* \param ptr [OUT] pointer to an atomic32 integer
* \param value [IN] value
*/
static HG_UTIL_INLINE void hg_atomic_init64(hg_atomic_int64_t *ptr, int64_t value);
/**
* Set atomic value (64-bit integer).
*
* \param ptr [OUT] pointer to an atomic64 integer
* \param value [IN] value
*/
static HG_UTIL_INLINE void hg_atomic_set64(hg_atomic_int64_t *ptr, int64_t value);
/**
* Get atomic value (64-bit integer).
*
* \param ptr [OUT] pointer to an atomic64 integer
*
* \return Value of the atomic integer
*/
static HG_UTIL_INLINE int64_t hg_atomic_get64(hg_atomic_int64_t *ptr);
/**
* Increment atomic value (64-bit integer).
*
* \param ptr [IN/OUT] pointer to an atomic64 integer
*
* \return Incremented value
*/
static HG_UTIL_INLINE int64_t hg_atomic_incr64(hg_atomic_int64_t *ptr);
/**
* Decrement atomic value (64-bit integer).
*
* \param ptr [IN/OUT] pointer to an atomic64 integer
*
* \return Decremented value
*/
static HG_UTIL_INLINE int64_t hg_atomic_decr64(hg_atomic_int64_t *ptr);
/**
* OR atomic value (64-bit integer).
*
* \param ptr [IN/OUT] pointer to an atomic64 integer
* \param value [IN] value to OR with
*
* \return Original value
*/
static HG_UTIL_INLINE int64_t hg_atomic_or64(hg_atomic_int64_t *ptr, int64_t value);
/**
* XOR atomic value (64-bit integer).
*
* \param ptr [IN/OUT] pointer to an atomic64 integer
* \param value [IN] value to XOR with
*
* \return Original value
*/
static HG_UTIL_INLINE int64_t hg_atomic_xor64(hg_atomic_int64_t *ptr, int64_t value);
/**
* AND atomic value (64-bit integer).
*
* \param ptr [IN/OUT] pointer to an atomic64 integer
* \param value [IN] value to AND with
*
* \return Original value
*/
static HG_UTIL_INLINE int64_t hg_atomic_and64(hg_atomic_int64_t *ptr, int64_t value);
/**
* Compare and swap values (64-bit integer).
*
* \param ptr [IN/OUT] pointer to an atomic64 integer
* \param compare_value [IN] value to compare to
* \param swap_value [IN] value to swap with if ptr value is equal to
* compare value
*
* \return true if swapped or false
*/
static HG_UTIL_INLINE bool hg_atomic_cas64(hg_atomic_int64_t *ptr, int64_t compare_value, int64_t swap_value);
/**
* Memory barrier.
*
*/
static HG_UTIL_INLINE void hg_atomic_fence(void);
/*---------------------------------------------------------------------------*/
static HG_UTIL_INLINE void
hg_atomic_init32(hg_atomic_int32_t *ptr, int32_t value)
{
#if defined(HG_UTIL_HAS_STDATOMIC_H)
atomic_init(ptr, value);
#else
hg_atomic_set32(ptr, value);
#endif
}
/*---------------------------------------------------------------------------*/
static HG_UTIL_INLINE void
hg_atomic_set32(hg_atomic_int32_t *ptr, int32_t value)
{
#if defined(_WIN32)
ptr->value = value;
#elif defined(HG_UTIL_HAS_STDATOMIC_H)
atomic_store_explicit(ptr, value, memory_order_release);
#elif defined(__APPLE__)
ptr->value = value;
#else
__atomic_store_n(ptr, value, __ATOMIC_RELEASE);
#endif
}
/*---------------------------------------------------------------------------*/
static HG_UTIL_INLINE int32_t
hg_atomic_get32(hg_atomic_int32_t *ptr)
{
int32_t ret;
#if defined(_WIN32)
ret = ptr->value;
#elif defined(HG_UTIL_HAS_STDATOMIC_H)
ret = atomic_load_explicit(ptr, memory_order_acquire);
#elif defined(__APPLE__)
ret = ptr->value;
#else
ret = __atomic_load_n(ptr, __ATOMIC_ACQUIRE);
#endif
return ret;
}
/*---------------------------------------------------------------------------*/
static HG_UTIL_INLINE int32_t
hg_atomic_incr32(hg_atomic_int32_t *ptr)
{
int32_t ret;
#if defined(_WIN32)
ret = InterlockedIncrementNoFence(&ptr->value);
#elif defined(HG_UTIL_HAS_STDATOMIC_H)
ret = atomic_fetch_add_explicit(ptr, 1, memory_order_acq_rel) + 1;
#elif defined(__APPLE__)
ret = OSAtomicIncrement32(&ptr->value);
#else
ret = __atomic_fetch_add(ptr, 1, __ATOMIC_ACQ_REL) + 1;
#endif
return ret;
}
/*---------------------------------------------------------------------------*/
static HG_UTIL_INLINE int32_t
hg_atomic_decr32(hg_atomic_int32_t *ptr)
{
int32_t ret;
#if defined(_WIN32)
ret = InterlockedDecrementNoFence(&ptr->value);
#elif defined(HG_UTIL_HAS_STDATOMIC_H)
ret = atomic_fetch_sub_explicit(ptr, 1, memory_order_acq_rel) - 1;
#elif defined(__APPLE__)
ret = OSAtomicDecrement32(&ptr->value);
#else
ret = __atomic_fetch_sub(ptr, 1, __ATOMIC_ACQ_REL) - 1;
#endif
return ret;
}
/*---------------------------------------------------------------------------*/
static HG_UTIL_INLINE int32_t
hg_atomic_or32(hg_atomic_int32_t *ptr, int32_t value)
{
int32_t ret;
#if defined(_WIN32)
ret = InterlockedOrNoFence(&ptr->value, value);
#elif defined(HG_UTIL_HAS_STDATOMIC_H)
ret = atomic_fetch_or_explicit(ptr, value, memory_order_acq_rel);
#elif defined(__APPLE__)
ret = OSAtomicOr32Orig((uint32_t)value, (volatile uint32_t *)&ptr->value);
#else
ret = __atomic_fetch_or(ptr, value, __ATOMIC_ACQ_REL);
#endif
return ret;
}
/*---------------------------------------------------------------------------*/
static HG_UTIL_INLINE int32_t
hg_atomic_xor32(hg_atomic_int32_t *ptr, int32_t value)
{
int32_t ret;
#if defined(_WIN32)
ret = InterlockedXorNoFence(&ptr->value, value);
#elif defined(HG_UTIL_HAS_STDATOMIC_H)
ret = atomic_fetch_xor_explicit(ptr, value, memory_order_acq_rel);
#elif defined(__APPLE__)
ret = OSAtomicXor32Orig((uint32_t)value, (volatile uint32_t *)&ptr->value);
#else
ret = __atomic_fetch_xor(ptr, value, __ATOMIC_ACQ_REL);
#endif
return ret;
}
/*---------------------------------------------------------------------------*/
static HG_UTIL_INLINE int32_t
hg_atomic_and32(hg_atomic_int32_t *ptr, int32_t value)
{
int32_t ret;
#if defined(_WIN32)
ret = InterlockedAndNoFence(&ptr->value, value);
#elif defined(HG_UTIL_HAS_STDATOMIC_H)
ret = atomic_fetch_and_explicit(ptr, value, memory_order_acq_rel);
#elif defined(__APPLE__)
ret = OSAtomicAnd32Orig((uint32_t)value, (volatile uint32_t *)&ptr->value);
#else
ret = __atomic_fetch_and(ptr, value, __ATOMIC_ACQ_REL);
#endif
return ret;
}
/*---------------------------------------------------------------------------*/
static HG_UTIL_INLINE bool
hg_atomic_cas32(hg_atomic_int32_t *ptr, int32_t compare_value, int32_t swap_value)
{
bool ret;
#if defined(_WIN32)
ret = (compare_value == InterlockedCompareExchangeNoFence(&ptr->value, swap_value, compare_value));
#elif defined(HG_UTIL_HAS_STDATOMIC_H)
ret = atomic_compare_exchange_strong_explicit(ptr, &compare_value, swap_value, memory_order_acq_rel,
memory_order_acquire);
#elif defined(__APPLE__)
ret = OSAtomicCompareAndSwap32(compare_value, swap_value, &ptr->value);
#else
ret = __atomic_compare_exchange_n(ptr, &compare_value, swap_value, false, __ATOMIC_ACQ_REL,
__ATOMIC_ACQUIRE);
#endif
return ret;
}
/*---------------------------------------------------------------------------*/
static HG_UTIL_INLINE void
hg_atomic_init64(hg_atomic_int64_t *ptr, int64_t value)
{
#if defined(HG_UTIL_HAS_STDATOMIC_H)
atomic_init(ptr, value);
#else
hg_atomic_set64(ptr, value);
#endif
}
/*---------------------------------------------------------------------------*/
static HG_UTIL_INLINE void
hg_atomic_set64(hg_atomic_int64_t *ptr, int64_t value)
{
#if defined(_WIN32)
ptr->value = value;
#elif defined(HG_UTIL_HAS_STDATOMIC_H)
atomic_store_explicit(ptr, value, memory_order_release);
#elif defined(__APPLE__)
ptr->value = value;
#else
__atomic_store_n(ptr, value, __ATOMIC_RELEASE);
#endif
}
/*---------------------------------------------------------------------------*/
static HG_UTIL_INLINE int64_t
hg_atomic_get64(hg_atomic_int64_t *ptr)
{
int64_t ret;
#if defined(_WIN32)
ret = ptr->value;
#elif defined(HG_UTIL_HAS_STDATOMIC_H)
ret = atomic_load_explicit(ptr, memory_order_acquire);
#elif defined(__APPLE__)
ptr->value = value;
#else
ret = __atomic_load_n(ptr, __ATOMIC_ACQUIRE);
#endif
return ret;
}
/*---------------------------------------------------------------------------*/
static HG_UTIL_INLINE int64_t
hg_atomic_incr64(hg_atomic_int64_t *ptr)
{
int64_t ret;
#if defined(_WIN32)
ret = InterlockedIncrementNoFence64(&ptr->value);
#elif defined(HG_UTIL_HAS_STDATOMIC_H)
ret = atomic_fetch_add_explicit(ptr, (int64_t)1, memory_order_acq_rel) + 1;
#elif defined(__APPLE__)
ret = OSAtomicIncrement64(&ptr->value);
#else
ret = __atomic_fetch_add(ptr, (int64_t)1, __ATOMIC_ACQ_REL) + 1;
#endif
return ret;
}
/*---------------------------------------------------------------------------*/
static HG_UTIL_INLINE int64_t
hg_atomic_decr64(hg_atomic_int64_t *ptr)
{
int64_t ret;
#if defined(_WIN32)
ret = InterlockedDecrementNoFence64(&ptr->value);
#elif defined(HG_UTIL_HAS_STDATOMIC_H)
ret = atomic_fetch_sub_explicit(ptr, (int64_t)1, memory_order_acq_rel) - 1;
#elif defined(__APPLE__)
ret = OSAtomicDecrement64(&ptr->value);
#else
ret = __atomic_fetch_sub(ptr, (int64_t)1, __ATOMIC_ACQ_REL) - 1;
#endif
return ret;
}
/*---------------------------------------------------------------------------*/
static HG_UTIL_INLINE int64_t
hg_atomic_or64(hg_atomic_int64_t *ptr, int64_t value)
{
int64_t ret;
#if defined(_WIN32)
ret = InterlockedOr64NoFence(&ptr->value, value);
#elif defined(HG_UTIL_HAS_STDATOMIC_H)
ret = atomic_fetch_or_explicit(ptr, value, memory_order_acq_rel);
#else
ret = __atomic_fetch_or(ptr, value, __ATOMIC_ACQ_REL);
#endif
return ret;
}
/*---------------------------------------------------------------------------*/
static HG_UTIL_INLINE int64_t
hg_atomic_xor64(hg_atomic_int64_t *ptr, int64_t value)
{
int64_t ret;
#if defined(_WIN32)
ret = InterlockedXor64NoFence(&ptr->value, value);
#elif defined(HG_UTIL_HAS_STDATOMIC_H)
ret = atomic_fetch_xor_explicit(ptr, value, memory_order_acq_rel);
#else
ret = __atomic_fetch_xor(ptr, value, __ATOMIC_ACQ_REL);
#endif
return ret;
}
/*---------------------------------------------------------------------------*/
static HG_UTIL_INLINE int64_t
hg_atomic_and64(hg_atomic_int64_t *ptr, int64_t value)
{
int64_t ret;
#if defined(_WIN32)
ret = InterlockedAnd64NoFence(&ptr->value, value);
#elif defined(HG_UTIL_HAS_STDATOMIC_H)
ret = atomic_fetch_and_explicit(ptr, value, memory_order_acq_rel);
#else
ret = __atomic_fetch_and(ptr, value, __ATOMIC_ACQ_REL);
#endif
return ret;
}
/*---------------------------------------------------------------------------*/
static HG_UTIL_INLINE bool
hg_atomic_cas64(hg_atomic_int64_t *ptr, int64_t compare_value, int64_t swap_value)
{
bool ret;
#if defined(_WIN32)
ret = (compare_value == InterlockedCompareExchangeNoFence64(&ptr->value, swap_value, compare_value));
#elif defined(HG_UTIL_HAS_STDATOMIC_H)
ret = atomic_compare_exchange_strong_explicit(ptr, &compare_value, swap_value, memory_order_acq_rel,
memory_order_acquire);
#elif defined(__APPLE__)
ret = OSAtomicCompareAndSwap64(compare_value, swap_value, &ptr->value);
#else
ret = __atomic_compare_exchange_n(ptr, &compare_value, swap_value, false, __ATOMIC_ACQ_REL,
__ATOMIC_ACQUIRE);
#endif
return ret;
}
/*---------------------------------------------------------------------------*/
static HG_UTIL_INLINE void
hg_atomic_fence(void)
{
#if defined(_WIN32)
MemoryBarrier();
#elif defined(HG_UTIL_HAS_STDATOMIC_H)
atomic_thread_fence(memory_order_acq_rel);
#elif defined(__APPLE__)
OSMemoryBarrier();
#else
__atomic_thread_fence(__ATOMIC_ACQ_REL);
#endif
}
#ifdef __cplusplus
}
#endif
#endif /* MERCURY_ATOMIC_H */
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