/*
* Copyright (c) 2008 - 2010
* Jonathan Schleifer <js@webkeks.org>
*
* All rights reserved.
*
* This file is part of ObjFW. It may be distributed under the terms of the
* Q Public License 1.0, which can be found in the file LICENSE included in
* the packaging of this file.
*/
#import "macros.h"
#if defined(OF_THREADS) && !defined(OF_HAVE_GCC_ATOMIC_OPS) && \
!defined(OF_HAVE_LIBKERN_OSATOMIC_H)
# error No atomic operations available!
#endif
#ifdef OF_HAVE_LIBKERN_OSATOMIC_H
# include <libkern/OSAtomic.h>
#endif
static OF_INLINE int32_t
of_atomic_add_32(volatile int32_t *p, int32_t i)
{
#if !defined(OF_THREADS)
return (*p += i);
#elif defined(OF_HAVE_GCC_ATOMIC_OPS)
return __sync_add_and_fetch(p, i);
#elif defined(OF_HAVE_LIBKERN_OSATOMIC_H)
return OSAtomicAdd32Barrier(i, p);
#endif
}
static OF_INLINE int32_t
of_atomic_sub_32(volatile int32_t *p, int32_t i)
{
#if !defined(OF_THREADS)
return (*p -= i);
#elif defined(OF_HAVE_GCC_ATOMIC_OPS)
return __sync_sub_and_fetch(p, i);
#elif defined(OF_HAVE_LIBKERN_OSATOMIC_H)
return OSAtomicAdd32Barrier(-i, p);
#endif
}
static OF_INLINE int32_t
of_atomic_inc_32(volatile int32_t *p)
{
#if !defined(OF_THREADS)
return ++*p;
#elif defined(OF_HAVE_GCC_ATOMIC_OPS)
return __sync_add_and_fetch(p, 1);
#elif defined(OF_HAVE_LIBKERN_OSATOMIC_H)
return OSAtomicIncrement32Barrier(p);
#endif
}
static OF_INLINE int32_t
of_atomic_dec_32(volatile int32_t *p)
{
#if !defined(OF_THREADS)
return --*p;
#elif defined(OF_HAVE_GCC_ATOMIC_OPS)
return __sync_sub_and_fetch(p, 1);
#elif defined(OF_HAVE_LIBKERN_OSATOMIC_H)
return OSAtomicDecrement32Barrier(p);
#endif
}
static OF_INLINE uint32_t
of_atomic_or_32(volatile uint32_t *p, uint32_t i)
{
#if !defined(OF_THREADS)
return (*p |= i);
#elif defined(OF_HAVE_GCC_ATOMIC_OPS)
return __sync_or_and_fetch(p, i);
#elif defined(OF_HAVE_LIBKERN_OSATOMIC_H)
return OSAtomicOr32Barrier(i, p);
#endif
}
static OF_INLINE uint32_t
of_atomic_and_32(volatile uint32_t *p, uint32_t i)
{
#if !defined(OF_THREADS)
return (*p &= i);
#elif defined(OF_HAVE_GCC_ATOMIC_OPS)
return __sync_and_and_fetch(p, i);
#elif defined(OF_HAVE_LIBKERN_OSATOMIC_H)
return OSAtomicAnd32Barrier(i, p);
#endif
}
static OF_INLINE uint32_t
of_atomic_xor_32(volatile uint32_t *p, uint32_t i)
{
#if !defined(OF_THREADS)
return (*p ^= i);
#elif defined(OF_HAVE_GCC_ATOMIC_OPS)
return __sync_xor_and_fetch(p, i);
#elif defined(OF_HAVE_LIBKERN_OSATOMIC_H)
return OSAtomicXor32Barrier(i, p);
#endif
}
static OF_INLINE BOOL
of_atomic_cmpswap_32(volatile int32_t *p, int32_t o, int32_t n)
{
#if !defined(OF_THREADS)
if (*p == o) {
*p = n;
return YES;
}
return NO;
#elif defined(OF_HAVE_GCC_ATOMIC_OPS)
return __sync_bool_compare_and_swap(p, o, n);
#elif defined(OF_HAVE_LIBKERN_OSATOMIC_H)
return OSAtomicCompareAndSwap32Barrier(o, n, p);
#endif
}
static OF_INLINE BOOL
of_atomic_cmpswap_ptr(void* volatile *p, void *o, void *n)
{
#if !defined(OF_THREADS)
if (*p == o) {
*p = n;
return YES;
}
return NO;
#elif defined(OF_HAVE_GCC_ATOMIC_OPS)
return __sync_bool_compare_and_swap(p, o, n);
#elif defined(OF_HAVE_LIBKERN_OSATOMIC_H)
return OSAtomicCompareAndSwapPtrBarrier(o, n, p);
#endif
}