/usr/include/sphde/sasatom_generic.h is in libsphde-dev 1.3.0-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* Copyright (c) 1995-2014 IBM Corporation.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*/
#ifndef _SASATOMIC_GENERIC_H
#define _SASATOMIC_GENERIC_H
#define __arch_sas_write_barrier() __asm ("" ::: "memory")
#define __arch_sas_read_barrier() __asm ("" ::: "memory")
#define __arch_sas_full_barrier() __asm ("" ::: "memory")
static inline void
__arch_pause (void)
{
__asm__ (
" nop;"
:
:
: "memory"
);
}
#if GCC_VERSION >= 40700
static inline void *
__arch_fetch_and_add_ptr(void **pointer, long int delta)
{
return __atomic_fetch_add (pointer, delta, __ATOMIC_RELAXED);
}
#else
static inline void *
__arch_fetch_and_add_ptr(void **pointer, long int delta)
{
return (void*)__sync_fetch_and_add((long int*)*pointer, delta);
}
#endif
#if GCC_VERSION >= 40700
static inline long int
__arch_fetch_and_add(long int *pointer, long int delta)
{
return __atomic_fetch_add (pointer, delta, __ATOMIC_RELAXED);
}
#else
static inline long int
__arch_fetch_and_add(void *pointer, long int delta)
{
return __sync_fetch_and_add((long int*)pointer, delta);
}
#endif
#if GCC_VERSION >= 40700
static inline int
__arch_compare_and_swap (volatile long int *pointer,
long int oldval, long int newval)
{
long int temp = oldval;
return __atomic_compare_exchange_n (pointer, &temp, newval, 1, __ATOMIC_ACQUIRE, __ATOMIC_RELAXED);
}
#else
static inline int
__arch_compare_and_swap (volatile long int *p, long int oldval, long int newval)
{
return __sync_val_compare_and_swap(p, oldval, newval);
}
#endif
#if GCC_VERSION >= 40700
static inline long int
__arch_atomic_swap (long int *pointer, long int replace)
{
return __atomic_exchange_n (pointer, replace, __ATOMIC_RELAXED);
}
#else
static inline long int __arch_atomic_swap(long int *p, long int replace)
{
long temp = *p;
int success = 0;
//*p = replace;
do {
temp = *p;
success = __sync_bool_compare_and_swap (p, temp, replace);
}while (!success);
return temp;
}
#endif
#if GCC_VERSION >= 40700
static inline void
__arch_atomic_inc(long int *pointer)
{
const long int inc_val = 1L;
__atomic_fetch_add (pointer, inc_val, __ATOMIC_RELAXED);
}
#else
static inline void
__arch_atomic_inc (long int *pointer)
{
const long int inc_val = 1L;
//(*p)++;
__sync_fetch_and_add (pointer, inc_val);
}
#endif
#if GCC_VERSION >= 40700
static inline void
__arch_atomic_dec(long int *pointer)
{
const long int inc_val = -1L;
__atomic_fetch_add (pointer, inc_val, __ATOMIC_RELAXED);
}
#else
static inline void
__arch_atomic_dec (long int *pointer)
{
const long int inc_val = -1L;
//(*p)--;
__sync_fetch_and_add (pointer, inc_val);
}
#endif
#if GCC_VERSION >= 40700
static inline void
__arch_sas_spin_lock (volatile sas_spin_lock_t *lock)
{
int oldval = 0;
int newval = 1;
int success = 0;
do {
success = __atomic_compare_exchange_n (lock, &oldval, newval, 1,
__ATOMIC_ACQUIRE, __ATOMIC_RELAXED);
} while (!success);
}
#else
static inline void
__arch_sas_spin_lock (volatile sas_spin_lock_t *lock)
{
int oldval = 0;
int newval = 1;
int success = 0;
do {
success = __sync_bool_compare_and_swap (lock, oldval, newval);
} while (!success);
}
#endif
#if GCC_VERSION >= 40700
static inline int
__arch_sas_spin_trylock (volatile sas_spin_lock_t *lock)
{
int oldval = 0;
int newval = 1;
int success = 0;
success = __atomic_compare_exchange_n (lock, &oldval, newval, 1,
__ATOMIC_ACQUIRE, __ATOMIC_RELAXED);
return (!success);
}
#else
static inline int
__arch_sas_spin_trylock (volatile sas_spin_lock_t *lock)
{
int oldval = 0;
int newval = 1;
int success;
success = __sync_bool_compare_and_swap (lock, oldval, newval);
return (!success);
}
#endif
#endif // _SASATOMIC_GENERIC_H
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