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/*
* Copyright (C) 2013-2019 Argonne National Laboratory, Department of Energy,
* UChicago Argonne, LLC and The HDF Group.
* All rights reserved.
*
* The full copyright notice, including terms governing use, modification,
* and redistribution, is contained in the COPYING file that can be
* found at the root of the source code distribution tree.
*/
#ifndef MERCURY_ATOMIC_H
#define MERCURY_ATOMIC_H
#include "mercury_util_config.h"
#if defined(_WIN32)
# include <windows.h>
typedef struct {
volatile LONG value;
} hg_atomic_int32_t;
typedef struct {
volatile LONGLONG value;
} hg_atomic_int64_t;
# define HG_ATOMIC_VAR_INIT(x) \
{ \
(x) \
}
#elif defined(HG_UTIL_HAS_OPA_PRIMITIVES_H)
# include <opa_primitives.h>
typedef OPA_int_t hg_atomic_int32_t;
typedef OPA_ptr_t hg_atomic_int64_t; /* OPA has only limited 64-bit support */
# define HG_ATOMIC_VAR_INIT(x) OPA_PTR_T_INITIALIZER(x)
#elif defined(HG_UTIL_HAS_STDATOMIC_H)
# include <stdatomic.h>
typedef atomic_int hg_atomic_int32_t;
# if HG_UTIL_ATOMIC_LONG_WIDTH == 8
typedef atomic_long hg_atomic_int64_t;
# else
typedef atomic_llong hg_atomic_int64_t;
# endif
# define HG_ATOMIC_VAR_INIT(x) ATOMIC_VAR_INIT(x)
#elif defined(__APPLE__)
# include <libkern/OSAtomic.h>
typedef struct {
volatile hg_util_int32_t value;
} hg_atomic_int32_t;
typedef struct {
volatile hg_util_int64_t value;
} hg_atomic_int64_t;
# define HG_ATOMIC_VAR_INIT(x) \
{ \
(x) \
}
#else
# error "Not supported on this platform."
#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, hg_util_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, hg_util_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 hg_util_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 hg_util_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 hg_util_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 hg_util_int32_t
hg_atomic_or32(hg_atomic_int32_t *ptr, hg_util_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 hg_util_int32_t
hg_atomic_xor32(hg_atomic_int32_t *ptr, hg_util_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 hg_util_int32_t
hg_atomic_and32(hg_atomic_int32_t *ptr, hg_util_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 HG_UTIL_TRUE if swapped or HG_UTIL_FALSE
*/
static HG_UTIL_INLINE hg_util_bool_t
hg_atomic_cas32(hg_atomic_int32_t *ptr, hg_util_int32_t compare_value,
hg_util_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, hg_util_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, hg_util_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 hg_util_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 hg_util_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 hg_util_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 hg_util_int64_t
hg_atomic_or64(hg_atomic_int64_t *ptr, hg_util_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 hg_util_int64_t
hg_atomic_xor64(hg_atomic_int64_t *ptr, hg_util_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 hg_util_int64_t
hg_atomic_and64(hg_atomic_int64_t *ptr, hg_util_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 HG_UTIL_TRUE if swapped or HG_UTIL_FALSE
*/
static HG_UTIL_INLINE hg_util_bool_t
hg_atomic_cas64(hg_atomic_int64_t *ptr, hg_util_int64_t compare_value,
hg_util_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, hg_util_int32_t value)
{
#if defined(HG_UTIL_HAS_STDATOMIC_H) && !defined(HG_UTIL_HAS_OPA_PRIMITIVES_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, hg_util_int32_t value)
{
#if defined(_WIN32)
ptr->value = value;
#elif defined(HG_UTIL_HAS_OPA_PRIMITIVES_H)
OPA_store_int(ptr, value);
#elif defined(HG_UTIL_HAS_STDATOMIC_H)
atomic_store_explicit(ptr, value, memory_order_release);
#elif defined(__APPLE__)
ptr->value = value;
#else
# error "Not supported on this platform."
#endif
}
/*---------------------------------------------------------------------------*/
static HG_UTIL_INLINE hg_util_int32_t
hg_atomic_get32(hg_atomic_int32_t *ptr)
{
hg_util_int32_t ret;
#if defined(_WIN32)
ret = ptr->value;
#elif defined(HG_UTIL_HAS_OPA_PRIMITIVES_H)
ret = OPA_load_int(ptr);
#elif defined(HG_UTIL_HAS_STDATOMIC_H)
ret = atomic_load_explicit(ptr, memory_order_acquire);
#elif defined(__APPLE__)
ret = ptr->value;
#else
# error "Not supported on this platform."
#endif
return ret;
}
/*---------------------------------------------------------------------------*/
static HG_UTIL_INLINE hg_util_int32_t
hg_atomic_incr32(hg_atomic_int32_t *ptr)
{
hg_util_int32_t ret;
#if defined(_WIN32)
ret = InterlockedIncrementNoFence(&ptr->value);
#elif defined(HG_UTIL_HAS_OPA_PRIMITIVES_H)
ret = OPA_fetch_and_incr_int(ptr) + 1;
#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
# error "Not supported on this platform."
#endif
return ret;
}
/*---------------------------------------------------------------------------*/
static HG_UTIL_INLINE hg_util_int32_t
hg_atomic_decr32(hg_atomic_int32_t *ptr)
{
hg_util_int32_t ret;
#if defined(_WIN32)
ret = InterlockedDecrementNoFence(&ptr->value);
#elif defined(HG_UTIL_HAS_OPA_PRIMITIVES_H)
ret = OPA_fetch_and_decr_int(ptr) - 1;
#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
# error "Not supported on this platform."
#endif
return ret;
}
/*---------------------------------------------------------------------------*/
static HG_UTIL_INLINE hg_util_int32_t
hg_atomic_or32(hg_atomic_int32_t *ptr, hg_util_int32_t value)
{
hg_util_int32_t ret;
#if defined(_WIN32)
ret = InterlockedOrNoFence(&ptr->value, value);
#elif defined(HG_UTIL_HAS_STDATOMIC_H) && !defined(HG_UTIL_HAS_OPA_PRIMITIVES_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
do {
ret = hg_atomic_get32(ptr);
} while (!hg_atomic_cas32(ptr, ret, (ret | value)));
#endif
return ret;
}
/*---------------------------------------------------------------------------*/
static HG_UTIL_INLINE hg_util_int32_t
hg_atomic_xor32(hg_atomic_int32_t *ptr, hg_util_int32_t value)
{
hg_util_int32_t ret;
#if defined(_WIN32)
ret = InterlockedXorNoFence(&ptr->value, value);
#elif defined(HG_UTIL_HAS_STDATOMIC_H) && !defined(HG_UTIL_HAS_OPA_PRIMITIVES_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
do {
ret = hg_atomic_get32(ptr);
} while (!hg_atomic_cas32(ptr, ret, (ret ^ value)));
#endif
return ret;
}
/*---------------------------------------------------------------------------*/
static HG_UTIL_INLINE hg_util_int32_t
hg_atomic_and32(hg_atomic_int32_t *ptr, hg_util_int32_t value)
{
hg_util_int32_t ret;
#if defined(_WIN32)
ret = InterlockedAndNoFence(&ptr->value, value);
#elif defined(HG_UTIL_HAS_STDATOMIC_H) && !defined(HG_UTIL_HAS_OPA_PRIMITIVES_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
do {
ret = hg_atomic_get32(ptr);
} while (!hg_atomic_cas32(ptr, ret, (ret & value)));
#endif
return ret;
}
/*---------------------------------------------------------------------------*/
static HG_UTIL_INLINE hg_util_bool_t
hg_atomic_cas32(hg_atomic_int32_t *ptr, hg_util_int32_t compare_value,
hg_util_int32_t swap_value)
{
hg_util_bool_t ret;
#if defined(_WIN32)
ret = (compare_value == InterlockedCompareExchangeNoFence(
&ptr->value, swap_value, compare_value));
#elif defined(HG_UTIL_HAS_OPA_PRIMITIVES_H)
ret = (hg_util_bool_t)(
compare_value == OPA_cas_int(ptr, compare_value, swap_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
# error "Not supported on this platform."
#endif
return ret;
}
/*---------------------------------------------------------------------------*/
static HG_UTIL_INLINE void
hg_atomic_init64(hg_atomic_int64_t *ptr, hg_util_int64_t value)
{
#if defined(HG_UTIL_HAS_STDATOMIC_H) && !defined(HG_UTIL_HAS_OPA_PRIMITIVES_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, hg_util_int64_t value)
{
#if defined(_WIN32)
ptr->value = value;
#elif defined(HG_UTIL_HAS_OPA_PRIMITIVES_H)
OPA_store_ptr(ptr, (void *) value);
#elif defined(HG_UTIL_HAS_STDATOMIC_H)
atomic_store_explicit(ptr, value, memory_order_release);
#elif defined(__APPLE__)
ptr->value = value;
#else
# error "Not supported on this platform."
#endif
}
/*---------------------------------------------------------------------------*/
static HG_UTIL_INLINE hg_util_int64_t
hg_atomic_get64(hg_atomic_int64_t *ptr)
{
hg_util_int64_t ret;
#if defined(_WIN32)
ret = ptr->value;
#elif defined(HG_UTIL_HAS_OPA_PRIMITIVES_H)
ret = (hg_util_int64_t) OPA_load_ptr(ptr);
#elif defined(HG_UTIL_HAS_STDATOMIC_H)
ret = atomic_load_explicit(ptr, memory_order_acquire);
#elif defined(__APPLE__)
ptr->value = value;
#else
# error "Not supported on this platform."
#endif
return ret;
}
/*---------------------------------------------------------------------------*/
static HG_UTIL_INLINE hg_util_int64_t
hg_atomic_incr64(hg_atomic_int64_t *ptr)
{
hg_util_int64_t ret;
#if defined(_WIN32)
ret = InterlockedIncrementNoFence64(&ptr->value);
#elif defined(HG_UTIL_HAS_STDATOMIC_H) && !defined(HG_UTIL_HAS_OPA_PRIMITIVES_H)
ret = atomic_fetch_add_explicit(ptr, 1, memory_order_acq_rel) + 1;
#elif defined(__APPLE__)
ret = OSAtomicIncrement64(&ptr->value);
#else
do {
ret = hg_atomic_get64(ptr);
} while (!hg_atomic_cas64(ptr, ret, ret + 1));
ret++;
#endif
return ret;
}
/*---------------------------------------------------------------------------*/
static HG_UTIL_INLINE hg_util_int64_t
hg_atomic_decr64(hg_atomic_int64_t *ptr)
{
hg_util_int64_t ret;
#if defined(_WIN32)
ret = InterlockedDecrementNoFence64(&ptr->value);
#elif defined(HG_UTIL_HAS_STDATOMIC_H) && !defined(HG_UTIL_HAS_OPA_PRIMITIVES_H)
ret = atomic_fetch_sub_explicit(ptr, 1, memory_order_acq_rel) - 1;
#elif defined(__APPLE__)
ret = OSAtomicDecrement64(&ptr->value);
#else
do {
ret = hg_atomic_get64(ptr);
} while (!hg_atomic_cas64(ptr, ret, ret - 1));
ret--;
#endif
return ret;
}
/*---------------------------------------------------------------------------*/
static HG_UTIL_INLINE hg_util_int64_t
hg_atomic_or64(hg_atomic_int64_t *ptr, hg_util_int64_t value)
{
hg_util_int64_t ret;
#if defined(_WIN32)
ret = InterlockedOr64NoFence(&ptr->value, value);
#elif defined(HG_UTIL_HAS_STDATOMIC_H) && !defined(HG_UTIL_HAS_OPA_PRIMITIVES_H)
ret = atomic_fetch_or_explicit(ptr, value, memory_order_acq_rel);
#else
do {
ret = hg_atomic_get64(ptr);
} while (!hg_atomic_cas64(ptr, ret, (ret | value)));
#endif
return ret;
}
/*---------------------------------------------------------------------------*/
static HG_UTIL_INLINE hg_util_int64_t
hg_atomic_xor64(hg_atomic_int64_t *ptr, hg_util_int64_t value)
{
hg_util_int64_t ret;
#if defined(_WIN32)
ret = InterlockedXor64NoFence(&ptr->value, value);
#elif defined(HG_UTIL_HAS_STDATOMIC_H) && !defined(HG_UTIL_HAS_OPA_PRIMITIVES_H)
ret = atomic_fetch_xor_explicit(ptr, value, memory_order_acq_rel);
#else
do {
ret = hg_atomic_get64(ptr);
} while (!hg_atomic_cas64(ptr, ret, (ret ^ value)));
#endif
return ret;
}
/*---------------------------------------------------------------------------*/
static HG_UTIL_INLINE hg_util_int64_t
hg_atomic_and64(hg_atomic_int64_t *ptr, hg_util_int64_t value)
{
hg_util_int64_t ret;
#if defined(_WIN32)
ret = InterlockedAnd64NoFence(&ptr->value, value);
#elif defined(HG_UTIL_HAS_STDATOMIC_H) && !defined(HG_UTIL_HAS_OPA_PRIMITIVES_H)
ret = atomic_fetch_and_explicit(ptr, value, memory_order_acq_rel);
#else
do {
ret = hg_atomic_get64(ptr);
} while (!hg_atomic_cas64(ptr, ret, (ret & value)));
#endif
return ret;
}
/*---------------------------------------------------------------------------*/
static HG_UTIL_INLINE hg_util_bool_t
hg_atomic_cas64(hg_atomic_int64_t *ptr, hg_util_int64_t compare_value,
hg_util_int64_t swap_value)
{
hg_util_bool_t ret;
#if defined(_WIN32)
ret = (compare_value == InterlockedCompareExchangeNoFence64(
&ptr->value, swap_value, compare_value));
#elif defined(HG_UTIL_HAS_OPA_PRIMITIVES_H)
ret = (hg_util_bool_t)(
compare_value == (hg_util_int64_t) OPA_cas_ptr(
ptr, (void *) compare_value, (void *) swap_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
# error "Not supported on this platform."
#endif
return ret;
}
/*---------------------------------------------------------------------------*/
static HG_UTIL_INLINE void
hg_atomic_fence()
{
#if defined(_WIN32)
MemoryBarrier();
#elif defined(HG_UTIL_HAS_OPA_PRIMITIVES_H)
OPA_read_write_barrier();
#elif defined(HG_UTIL_HAS_STDATOMIC_H)
atomic_thread_fence(memory_order_acq_rel);
#elif defined(__APPLE__)
OSMemoryBarrier();
#else
# error "Not supported on this platform."
#endif
}
#ifdef __cplusplus
}
#endif
#endif /* MERCURY_ATOMIC_H */
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