/*
* Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015
* 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.QPL included in
* the packaging of this file.
*
* Alternatively, it may be distributed under the terms of the GNU General
* Public License, either version 2 or 3, which can be found in the file
* LICENSE.GPLv2 or LICENSE.GPLv3 respectively included in the packaging of this
* file.
*/
#import "objfw-defs.h"
#ifndef OF_HAVE_ATOMIC_OPS
# error No atomic operations available!
#endif
#include <stdlib.h>
#import "macros.h"
#ifdef OF_HAVE_OSATOMIC
# include <libkern/OSAtomic.h>
#endif
OF_ASSUME_NONNULL_BEGIN
static OF_INLINE int
of_atomic_int_add(volatile int *OF_NONNULL p, int i)
{
#if !defined(OF_HAVE_THREADS)
return (*p += i);
#elif defined(OF_HAVE_GCC_ATOMIC_OPS)
return __sync_add_and_fetch(p, i);
#elif defined(OF_X86_64_ASM) || defined(OF_X86_ASM)
if (sizeof(int) == 4)
__asm__ __volatile__ (
"lock\n\t"
"xaddl %0, %2\n\t"
"addl %1, %0"
: "+&r"(i)
: "r"(i), "m"(*p)
);
# ifdef OF_X86_64_ASM
else if (sizeof(int) == 8)
__asm__ __volatile__ (
"lock\n\t"
"xaddq %0, %2\n\t"
"addq %1, %0"
: "+&r"(i)
: "r"(i), "m"(*p)
);
# endif
else
abort();
return i;
#elif defined(OF_PPC_ASM)
__asm__ __volatile__ (
"0:\n\t"
"lwarx %0, 0, %2\n\t"
"add %0, %0, %1\n\t"
"stwcx. %0, 0, %2\n\t"
"bne- 0b"
: "=&r"(i)
: "r"(i), "r"(p)
);
return i;
#elif defined(OF_HAVE_OSATOMIC)
return OSAtomicAdd32Barrier(i, p);
#else
# error of_atomic_int_add not implemented!
#endif
}
static OF_INLINE int32_t
of_atomic_int32_add(volatile int32_t *OF_NONNULL p, int32_t i)
{
#if !defined(OF_HAVE_THREADS)
return (*p += i);
#elif defined(OF_HAVE_GCC_ATOMIC_OPS)
return __sync_add_and_fetch(p, i);
#elif defined(OF_X86_64_ASM) || defined(OF_X86_ASM)
__asm__ __volatile__ (
"lock\n\t"
"xaddl %0, %2\n\t"
"addl %1, %0"
: "+&r"(i)
: "r"(i), "m"(*p)
);
return i;
#elif defined(OF_PPC_ASM)
__asm__ __volatile__ (
"0:\n\t"
"lwarx %0, 0, %2\n\t"
"add %0, %0, %1\n\t"
"stwcx. %0, 0, %2\n\t"
"bne- 0b"
: "=&r"(i)
: "r"(i), "r"(p)
);
return i;
#elif defined(OF_HAVE_OSATOMIC)
return OSAtomicAdd32Barrier(i, p);
#else
# error of_atomic_int32_add not implemented!
#endif
}
static OF_INLINE void*
of_atomic_ptr_add(void *volatile OF_NULLABLE *OF_NONNULL p, intptr_t i)
{
#if !defined(OF_HAVE_THREADS)
return (*(char* volatile*)p += i);
#elif defined(OF_HAVE_GCC_ATOMIC_OPS)
return __sync_add_and_fetch(p, (void*)i);
#elif defined(OF_X86_64_ASM)
__asm__ __volatile__ (
"lock\n\t"
"xaddq %0, %2\n\t"
"addq %1, %0"
: "+&r"(i)
: "r"(i), "m"(*p)
);
return (void*)i;
#elif defined(OF_X86_ASM)
__asm__ __volatile__ (
"lock\n\t"
"xaddl %0, %2\n\t"
"addl %1, %0"
: "+&r"(i)
: "r"(i), "m"(*p)
);
return (void*)i;
#elif defined(OF_PPC_ASM)
__asm__ __volatile__ (
"0:\n\t"
"lwarx %0, 0, %2\n\t"
"add %0, %0, %1\n\t"
"stwcx. %0, 0, %2\n\t"
"bne- 0b"
: "=&r"(i)
: "r"(i), "r"(p)
);
return (void*)i;
#elif defined(OF_HAVE_OSATOMIC)
# ifdef __LP64__
return (void*)OSAtomicAdd64Barrier(i, (int64_t*)p);
# else
return (void*)OSAtomicAdd32Barrier(i, (int32_t*)p);
# endif
#else
# error of_atomic_ptr_add not implemented!
#endif
}
static OF_INLINE int
of_atomic_int_sub(volatile int *OF_NONNULL p, int i)
{
#if !defined(OF_HAVE_THREADS)
return (*p -= i);
#elif defined(OF_HAVE_GCC_ATOMIC_OPS)
return __sync_sub_and_fetch(p, i);
#elif defined(OF_X86_64_ASM) || defined(OF_X86_ASM)
if (sizeof(int) == 4)
__asm__ __volatile__ (
"negl %0\n\t"
"lock\n\t"
"xaddl %0, %2\n\t"
"subl %1, %0"
: "+&r"(i)
: "r"(i), "m"(*p)
);
# ifdef OF_X86_64_ASM
else if (sizeof(int) == 8)
__asm__ __volatile__ (
"negq %0\n\t"
"lock\n\t"
"xaddq %0, %2\n\t"
"subq %1, %0"
: "+&r"(i)
: "r"(i), "m"(*p)
);
# endif
else
abort();
return i;
#elif defined(OF_PPC_ASM)
__asm__ __volatile__ (
"0:\n\t"
"lwarx %0, 0, %2\n\t"
"sub %0, %0, %1\n\t"
"stwcx. %0, 0, %2\n\t"
"bne- 0b"
: "=&r"(i)
: "r"(i), "r"(p)
);
return i;
#elif defined(OF_HAVE_OSATOMIC)
return OSAtomicAdd32Barrier(-i, p);
#else
# error of_atomic_int_sub not implemented!
#endif
}
static OF_INLINE int32_t
of_atomic_int32_sub(volatile int32_t *OF_NONNULL p, int32_t i)
{
#if !defined(OF_HAVE_THREADS)
return (*p -= i);
#elif defined(OF_HAVE_GCC_ATOMIC_OPS)
return __sync_sub_and_fetch(p, i);
#elif defined(OF_X86_64_ASM) || defined(OF_X86_ASM)
__asm__ __volatile__ (
"negl %0\n\t"
"lock\n\t"
"xaddl %0, %2\n\t"
"subl %1, %0"
: "+&r"(i)
: "r"(i), "m"(*p)
);
return i;
#elif defined(OF_PPC_ASM)
__asm__ __volatile__ (
"0:\n\t"
"lwarx %0, 0, %2\n\t"
"sub %0, %0, %1\n\t"
"stwcx. %0, 0, %2\n\t"
"bne- 0b"
: "=&r"(i)
: "r"(i), "r"(p)
);
return i;
#elif defined(OF_HAVE_OSATOMIC)
return OSAtomicAdd32Barrier(-i, p);
#else
# error of_atomic_int32_sub not implemented!
#endif
}
static OF_INLINE void*
of_atomic_ptr_sub(void *volatile OF_NULLABLE *OF_NONNULL p, intptr_t i)
{
#if !defined(OF_HAVE_THREADS)
return (*(char* volatile*)p -= i);
#elif defined(OF_HAVE_GCC_ATOMIC_OPS)
return __sync_sub_and_fetch(p, (void*)i);
#elif defined(OF_X86_64_ASM)
__asm__ __volatile__ (
"negq %0\n\t"
"lock\n\t"
"xaddq %0, %2\n\t"
"subq %1, %0"
: "+&r"(i)
: "r"(i), "m"(*p)
);
return (void*)i;
#elif defined(OF_X86_ASM)
__asm__ __volatile__ (
"negl %0\n\t"
"lock\n\t"
"xaddl %0, %2\n\t"
"subl %1, %0"
: "+&r"(i)
: "r"(i), "m"(*p)
);
return (void*)i;
#elif defined(OF_PPC_ASM)
__asm__ __volatile__ (
"0:\n\t"
"lwarx %0, 0, %2\n\t"
"sub %0, %0, %1\n\t"
"stwcx. %0, 0, %2\n\t"
"bne- 0b"
: "=&r"(i)
: "r"(i), "r"(p)
);
return (void*)i;
#elif defined(OF_HAVE_OSATOMIC)
# ifdef __LP64__
return (void*)OSAtomicAdd64Barrier(-i, (int64_t*)p);
# else
return (void*)OSAtomicAdd32Barrier(-i, (int32_t*)p);
# endif
#else
# error of_atomic_ptr_sub not implemented!
#endif
}
static OF_INLINE int
of_atomic_int_inc(volatile int *OF_NONNULL p)
{
#if !defined(OF_HAVE_THREADS)
return ++*p;
#elif defined(OF_HAVE_GCC_ATOMIC_OPS)
return __sync_add_and_fetch(p, 1);
#elif defined(OF_X86_64_ASM) || defined(OF_X86_ASM)
int i;
if (sizeof(int) == 4)
__asm__ __volatile__ (
"xorl %0, %0\n\t"
"incl %0\n\t"
"lock\n\t"
"xaddl %0, %1\n\t"
"incl %0"
: "=&r"(i)
: "m"(*p)
);
# ifdef OF_X86_64_ASM
else if (sizeof(int) == 8)
__asm__ __volatile__ (
"xorq %0, %0\n\t"
"incq %0\n\t"
"lock\n\t"
"xaddq %0, %1\n\t"
"incq %0"
: "=&r"(i)
: "m"(*p)
);
# endif
else
abort();
return i;
#elif defined(OF_PPC_ASM)
int i;
__asm__ __volatile__ (
"0:\n\t"
"lwarx %0, 0, %1\n\t"
"addi %0, %0, 1\n\t"
"stwcx. %0, 0, %1\n\t"
"bne- 0b"
: "=&r"(i)
: "r"(p)
);
return i;
#elif defined(OF_HAVE_OSATOMIC)
return OSAtomicIncrement32Barrier(p);
#else
# error of_atomic_int_inc not implemented!
#endif
}
static OF_INLINE int32_t
of_atomic_int32_inc(volatile int32_t *OF_NONNULL p)
{
#if !defined(OF_HAVE_THREADS)
return ++*p;
#elif defined(OF_HAVE_GCC_ATOMIC_OPS)
return __sync_add_and_fetch(p, 1);
#elif defined(OF_X86_64_ASM) || defined(OF_X86_ASM)
int32_t i;
__asm__ __volatile__ (
"xorl %0, %0\n\t"
"incl %0\n\t"
"lock\n\t"
"xaddl %0, %1\n\t"
"incl %0"
: "=&r"(i)
: "m"(*p)
);
return i;
#elif defined(OF_PPC_ASM)
int32_t i;
__asm__ __volatile__ (
"0:\n\t"
"lwarx %0, 0, %1\n\t"
"addi %0, %0, 1\n\t"
"stwcx. %0, 0, %1\n\t"
"bne- 0b"
: "=&r"(i)
: "r"(p)
);
return i;
#elif defined(OF_HAVE_OSATOMIC)
return OSAtomicIncrement32Barrier(p);
#else
# error of_atomic_int32_inc not implemented!
#endif
}
static OF_INLINE int
of_atomic_int_dec(volatile int *OF_NONNULL p)
{
#if !defined(OF_HAVE_THREADS)
return --*p;
#elif defined(OF_HAVE_GCC_ATOMIC_OPS)
return __sync_sub_and_fetch(p, 1);
#elif defined(OF_X86_64_ASM) || defined(OF_X86_ASM)
int i;
if (sizeof(int) == 4)
__asm__ __volatile__ (
"xorl %0, %0\n\t"
"decl %0\n\t"
"lock\n\t"
"xaddl %0, %1\n\t"
"decl %0"
: "=&r"(i)
: "m"(*p)
);
# ifdef OF_X86_64_ASM
else if (sizeof(int) == 8)
__asm__ __volatile__ (
"xorq %0, %0\n\t"
"decq %0\n\t"
"lock\n\t"
"xaddq %0, %1\n\t"
"decq %0"
: "=&r"(i)
: "m"(*p)
);
# endif
else
abort();
return i;
#elif defined(OF_PPC_ASM)
int i;
__asm__ __volatile__ (
"0:\n\t"
"lwarx %0, 0, %1\n\t"
"subi %0, %0, 1\n\t"
"stwcx. %0, 0, %1\n\t"
"bne- 0b"
: "=&r"(i)
: "r"(p)
);
return i;
#elif defined(OF_HAVE_OSATOMIC)
return OSAtomicDecrement32Barrier(p);
#else
# error of_atomic_int_dec not implemented!
#endif
}
static OF_INLINE int32_t
of_atomic_int32_dec(volatile int32_t *OF_NONNULL p)
{
#if !defined(OF_HAVE_THREADS)
return --*p;
#elif defined(OF_HAVE_GCC_ATOMIC_OPS)
return __sync_sub_and_fetch(p, 1);
#elif defined(OF_X86_64_ASM) || defined(OF_X86_ASM)
int32_t i;
__asm__ __volatile__ (
"xorl %0, %0\n\t"
"decl %0\n\t"
"lock\n\t"
"xaddl %0, %1\n\t"
"decl %0"
: "=&r"(i)
: "m"(*p)
);
return i;
#elif defined(OF_PPC_ASM)
int32_t i;
__asm__ __volatile__ (
"0:\n\t"
"lwarx %0, 0, %1\n\t"
"subi %0, %0, 1\n\t"
"stwcx. %0, 0, %1\n\t"
"bne- 0b"
: "=&r"(i)
: "r"(p)
);
return i;
#elif defined(OF_HAVE_OSATOMIC)
return OSAtomicDecrement32Barrier(p);
#else
# error of_atomic_int32_dec not implemented!
#endif
}
static OF_INLINE unsigned int
of_atomic_int_or(volatile unsigned int *OF_NONNULL p, unsigned int i)
{
#if !defined(OF_HAVE_THREADS)
return (*p |= i);
#elif defined(OF_HAVE_GCC_ATOMIC_OPS)
return __sync_or_and_fetch(p, i);
#elif defined(OF_X86_64_ASM) || defined(OF_X86_ASM)
if (sizeof(int) == 4)
__asm__ __volatile__ (
"0:\n\t"
"movl %2, %0\n\t"
"movl %0, %%eax\n\t"
"orl %1, %0\n\t"
"lock\n\t"
"cmpxchg %0, %2\n\t"
"jne 0b"
: "=&r"(i)
: "r"(i), "m"(*p)
: "eax", "cc"
);
# ifdef OF_X86_64_ASM
else if (sizeof(int) == 8)
__asm__ __volatile__ (
"0:\n\t"
"movq %2, %0\n\t"
"movq %0, %%rax\n\t"
"orq %1, %0\n\t"
"lock\n\t"
"cmpxchg %0, %2\n\t"
"jne 0b"
: "=&r"(i)
: "r"(i), "m"(*p)
: "rax", "cc"
);
# endif
else
abort();
return i;
#elif defined(OF_PPC_ASM)
__asm__ __volatile__ (
"0:\n\t"
"lwarx %0, 0, %2\n\t"
"or %0, %0, %1\n\t"
"stwcx. %0, 0, %2\n\t"
"bne- 0b"
: "=&r"(i)
: "r"(i), "r"(p)
);
return i;
#elif defined(OF_HAVE_OSATOMIC)
return OSAtomicOr32Barrier(i, p);
#else
# error of_atomic_int_or not implemented!
#endif
}
static OF_INLINE uint32_t
of_atomic_int32_or(volatile uint32_t *OF_NONNULL p, uint32_t i)
{
#if !defined(OF_HAVE_THREADS)
return (*p |= i);
#elif defined(OF_HAVE_GCC_ATOMIC_OPS)
return __sync_or_and_fetch(p, i);
#elif defined(OF_X86_64_ASM) || defined(OF_X86_ASM)
__asm__ __volatile__ (
"0:\n\t"
"movl %2, %0\n\t"
"movl %0, %%eax\n\t"
"orl %1, %0\n\t"
"lock\n\t"
"cmpxchg %0, %2\n\t"
"jne 0b"
: "=&r"(i)
: "r"(i), "m"(*p)
: "eax", "cc"
);
return i;
#elif defined(OF_PPC_ASM)
__asm__ __volatile__ (
"0:\n\t"
"lwarx %0, 0, %2\n\t"
"or %0, %0, %1\n\t"
"stwcx. %0, 0, %2\n\t"
"bne- 0b"
: "=&r"(i)
: "r"(i), "r"(p)
);
return i;
#elif defined(OF_HAVE_OSATOMIC)
return OSAtomicOr32Barrier(i, p);
#else
# error of_atomic_int32_or not implemented!
#endif
}
static OF_INLINE unsigned int
of_atomic_int_and(volatile unsigned int *OF_NONNULL p, unsigned int i)
{
#if !defined(OF_HAVE_THREADS)
return (*p &= i);
#elif defined(OF_HAVE_GCC_ATOMIC_OPS)
return __sync_and_and_fetch(p, i);
#elif defined(OF_X86_64_ASM) || defined(OF_X86_ASM)
if (sizeof(int) == 4)
__asm__ __volatile__ (
"0:\n\t"
"movl %2, %0\n\t"
"movl %0, %%eax\n\t"
"andl %1, %0\n\t"
"lock\n\t"
"cmpxchg %0, %2\n\t"
"jne 0b"
: "=&r"(i)
: "r"(i), "m"(*p)
: "eax", "cc"
);
# ifdef OF_X86_64_ASM
else if (sizeof(int) == 8)
__asm__ __volatile__ (
"0:\n\t"
"movq %2, %0\n\t"
"movq %0, %%rax\n\t"
"andq %1, %0\n\t"
"lock\n\t"
"cmpxchg %0, %2\n\t"
"jne 0b"
: "=&r"(i)
: "r"(i), "m"(*p)
: "rax", "cc"
);
# endif
else
abort();
return i;
#elif defined(OF_PPC_ASM)
__asm__ __volatile__ (
"0:\n\t"
"lwarx %0, 0, %2\n\t"
"and %0, %0, %1\n\t"
"stwcx. %0, 0, %2\n\t"
"bne- 0b"
: "=&r"(i)
: "r"(i), "r"(p)
);
return i;
#elif defined(OF_HAVE_OSATOMIC)
return OSAtomicAnd32Barrier(i, p);
#else
# error of_atomic_int_and not implemented!
#endif
}
static OF_INLINE uint32_t
of_atomic_int32_and(volatile uint32_t *OF_NONNULL p, uint32_t i)
{
#if !defined(OF_HAVE_THREADS)
return (*p &= i);
#elif defined(OF_HAVE_GCC_ATOMIC_OPS)
return __sync_and_and_fetch(p, i);
#elif defined(OF_X86_64_ASM) || defined(OF_X86_ASM)
__asm__ __volatile__ (
"0:\n\t"
"movl %2, %0\n\t"
"movl %0, %%eax\n\t"
"andl %1, %0\n\t"
"lock\n\t"
"cmpxchg %0, %2\n\t"
"jne 0b"
: "=&r"(i)
: "r"(i), "m"(*p)
: "eax", "cc"
);
return i;
#elif defined(OF_PPC_ASM)
__asm__ __volatile__ (
"0:\n\t"
"lwarx %0, 0, %2\n\t"
"and %0, %0, %1\n\t"
"stwcx. %0, 0, %2\n\t"
"bne- 0b"
: "=&r"(i)
: "r"(i), "r"(p)
);
return i;
#elif defined(OF_HAVE_OSATOMIC)
return OSAtomicAnd32Barrier(i, p);
#else
# error of_atomic_int32_and not implemented!
#endif
}
static OF_INLINE unsigned int
of_atomic_int_xor(volatile unsigned int *OF_NONNULL p, unsigned int i)
{
#if !defined(OF_HAVE_THREADS)
return (*p ^= i);
#elif defined(OF_HAVE_GCC_ATOMIC_OPS)
return __sync_xor_and_fetch(p, i);
#elif defined(OF_X86_64_ASM) || defined(OF_X86_ASM)
if (sizeof(int) == 4)
__asm__ __volatile__ (
"0:\n\t"
"movl %2, %0\n\t"
"movl %0, %%eax\n\t"
"xorl %1, %0\n\t"
"lock\n\t"
"cmpxchg %0, %2\n\t"
"jne 0b"
: "=&r"(i)
: "r"(i), "m"(*p)
: "eax", "cc"
);
# ifdef OF_X86_64_ASM
else if (sizeof(int) == 8)
__asm__ __volatile__ (
"0:\n\t"
"movq %2, %0\n\t"
"movq %0, %%rax\n\t"
"xorq %1, %0\n\t"
"lock\n\t"
"cmpxchg %0, %2\n\t"
"jne 0b"
: "=&r"(i)
: "r"(i), "m"(*p)
: "rax", "cc"
);
# endif
else
abort();
return i;
#elif defined(OF_PPC_ASM)
__asm__ __volatile__ (
"0:\n\t"
"lwarx %0, 0, %2\n\t"
"xor %0, %0, %1\n\t"
"stwcx. %0, 0, %2\n\t"
"bne- 0b"
: "=&r"(i)
: "r"(i), "r"(p)
);
return i;
#elif defined(OF_HAVE_OSATOMIC)
return OSAtomicXor32Barrier(i, p);
#else
# error of_atomic_int_xor not implemented!
#endif
}
static OF_INLINE uint32_t
of_atomic_int32_xor(volatile uint32_t *OF_NONNULL p, uint32_t i)
{
#if !defined(OF_HAVE_THREADS)
return (*p ^= i);
#elif defined(OF_HAVE_GCC_ATOMIC_OPS)
return __sync_xor_and_fetch(p, i);
#elif defined(OF_X86_64_ASM) || defined(OF_X86_ASM)
__asm__ __volatile__ (
"0:\n\t"
"movl %2, %0\n\t"
"movl %0, %%eax\n\t"
"xorl %1, %0\n\t"
"lock\n\t"
"cmpxchgl %0, %2\n\t"
"jne 0b"
: "=&r"(i)
: "r"(i), "m"(*p)
: "eax", "cc"
);
return i;
#elif defined(OF_PPC_ASM)
__asm__ __volatile__ (
"0:\n\t"
"lwarx %0, 0, %2\n\t"
"xor %0, %0, %1\n\t"
"stwcx. %0, 0, %2\n\t"
"bne- 0b"
: "=&r"(i)
: "r"(i), "r"(p)
);
return i;
#elif defined(OF_HAVE_OSATOMIC)
return OSAtomicXor32Barrier(i, p);
#else
# error of_atomic_int32_xor not implemented!
#endif
}
static OF_INLINE bool
of_atomic_int_cmpswap(volatile int *OF_NONNULL p, int o, int n)
{
#if !defined(OF_HAVE_THREADS)
if (*p == o) {
*p = n;
return true;
}
return false;
#elif defined(OF_HAVE_GCC_ATOMIC_OPS)
return __sync_bool_compare_and_swap(p, o, n);
#elif defined(OF_X86_64_ASM) || defined(OF_X86_ASM)
int r;
__asm__ __volatile__ (
"lock\n\t"
"cmpxchg %2, %3\n\t"
"sete %b0\n\t"
"movzbl %b0, %0"
: "=&d"(r), "+a"(o) /* use d instead of r to avoid a gcc bug */
: "r"(n), "m"(*p)
: "cc"
);
return r;
#elif defined(OF_PPC_ASM)
int r;
__asm__ __volatile__ (
"0:\n\t"
"lwarx %0, 0, %3\n\t"
"cmpw %0, %1\n\t"
"bne 1f\n\t"
"stwcx. %2, 0, %3\n\t"
"bne- 0b\n\t"
"li %0, 1\n\t"
"b 2f\n\t"
"1:\n\t"
"stwcx. %0, 0, %3\n\t"
"li %0, 0\n\t"
"2:"
: "=&r"(r)
: "r"(o), "r"(n), "r"(p)
: "cc"
);
return r;
#elif defined(OF_HAVE_OSATOMIC)
return OSAtomicCompareAndSwapIntBarrier(o, n, p);
#else
# error of_atomic_int_cmpswap not implemented!
#endif
}
static OF_INLINE bool
of_atomic_int32_cmpswap(volatile int32_t *OF_NONNULL p, int32_t o, int32_t n)
{
#if !defined(OF_HAVE_THREADS)
if (*p == o) {
*p = n;
return true;
}
return false;
#elif defined(OF_HAVE_GCC_ATOMIC_OPS)
return __sync_bool_compare_and_swap(p, o, n);
#elif defined(OF_X86_64_ASM) || defined(OF_X86_ASM)
int r;
__asm__ __volatile__ (
"lock\n\t"
"cmpxchg %2, %3\n\t"
"sete %b0\n\t"
"movzbl %b0, %0"
: "=&d"(r), "+a"(o) /* use d instead of r to avoid a gcc bug */
: "r"(n), "m"(*p)
: "cc"
);
return r;
#elif defined(OF_PPC_ASM)
int r;
__asm__ __volatile__ (
"0:\n\t"
"lwarx %0, 0, %3\n\t"
"cmpw %0, %1\n\t"
"bne 1f\n\t"
"stwcx. %2, 0, %3\n\t"
"bne- 0b\n\t"
"li %0, 1\n\t"
"b 2f\n\t"
"1:\n\t"
"stwcx. %0, 0, %3\n\t"
"li %0, 0\n\t"
"2:"
: "=&r"(r)
: "r"(o), "r"(n), "r"(p)
: "cc"
);
return r;
#elif defined(OF_HAVE_OSATOMIC)
return OSAtomicCompareAndSwap32Barrier(o, n, p);
#else
# error of_atomic_int32_cmpswap not implemented!
#endif
}
static OF_INLINE bool
of_atomic_ptr_cmpswap(void *volatile OF_NULLABLE *OF_NONNULL p,
void *OF_NULLABLE o, void *OF_NULLABLE n)
{
#if !defined(OF_HAVE_THREADS)
if (*p == o) {
*p = n;
return true;
}
return false;
#elif defined(OF_HAVE_GCC_ATOMIC_OPS)
return __sync_bool_compare_and_swap(p, o, n);
#elif defined(OF_X86_64_ASM) || defined(OF_X86_ASM)
int r;
__asm__ __volatile__ (
"lock\n\t"
"cmpxchg %2, %3\n\t"
"sete %b0\n\t"
"movzbl %b0, %0"
: "=&d"(r), "+a"(o) /* use d instead of r to avoid a gcc bug */
: "r"(n), "m"(*p)
: "cc"
);
return r;
#elif defined(OF_PPC_ASM)
int r;
__asm__ __volatile__ (
"0:\n\t"
"lwarx %0, 0, %3\n\t"
"cmpw %0, %1\n\t"
"bne 1f\n\t"
"stwcx. %2, 0, %3\n\t"
"bne- 0b\n\t"
"li %0, 1\n\t"
"b 2f\n\t"
"1:\n\t"
"stwcx. %0, 0, %3\n\t"
"li %0, 0\n\t"
"2:"
: "=&r"(r)
: "r"(o), "r"(n), "r"(p)
: "cc"
);
return r;
#elif defined(OF_HAVE_OSATOMIC)
return OSAtomicCompareAndSwapPtrBarrier(o, n, p);
#else
# error of_atomic_ptr_cmpswap not implemented!
#endif
}
static OF_INLINE void
of_memory_barrier(void)
{
#if !defined(OF_HAVE_THREADS)
#elif defined(OF_X86_64_ASM) || defined(OF_X86_ASM)
__asm__ __volatile__ (
"mfence"
);
#elif defined(OF_PPC_ASM)
__asm__ __volatile__ (
"sync"
);
#elif defined(OF_HAVE_GCC_ATOMIC_OPS)
__sync_synchronize();
#elif defined(OF_HAVE_OSATOMIC)
OSMemoryBarrier();
#else
# error of_memory_barrier not implemented!
#endif
}
static OF_INLINE void
of_memory_read_barrier(void)
{
#if !defined(OF_HAVE_THREADS)
#elif defined(OF_X86_64_ASM) || defined(OF_X86_ASM)
__asm__ __volatile__ (
"lfence"
);
#else
of_memory_barrier();
#endif
}
static OF_INLINE void
of_memory_write_barrier(void)
{
#if !defined(OF_HAVE_THREADS)
#elif defined(OF_X86_64_ASM) || defined(OF_X86_ASM)
__asm__ __volatile__ (
"sfence"
);
#else
of_memory_barrier();
#endif
}
OF_ASSUME_NONNULL_END