+++ /dev/null
-#ifndef _URCU_UATOMIC_GENERIC_H
-#define _URCU_UATOMIC_GENERIC_H
-
-/*
- * Copyright (c) 1991-1994 by Xerox Corporation. All rights reserved.
- * Copyright (c) 1996-1999 by Silicon Graphics. All rights reserved.
- * Copyright (c) 1999-2004 Hewlett-Packard Development Company, L.P.
- * Copyright (c) 2009 Mathieu Desnoyers
- * Copyright (c) 2010 Paolo Bonzini
- *
- * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
- * OR IMPLIED. ANY USE IS AT YOUR OWN RISK.
- *
- * Permission is hereby granted to use or copy this program
- * for any purpose, provided the above notices are retained on all copies.
- * Permission to modify the code and to distribute modified code is granted,
- * provided the above notices are retained, and a notice that the code was
- * modified is included with the above copyright notice.
- *
- * Code inspired from libuatomic_ops-1.2, inherited in part from the
- * Boehm-Demers-Weiser conservative garbage collector.
- */
-
-#include <urcu/compiler.h>
-#include <urcu/system.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-#ifndef uatomic_set
-#define uatomic_set(addr, v) CMM_STORE_SHARED(*(addr), (v))
-#endif
-
-#ifndef uatomic_read
-#define uatomic_read(addr) CMM_LOAD_SHARED(*(addr))
-#endif
-
-#if !defined __OPTIMIZE__ || defined UATOMIC_NO_LINK_ERROR
-static inline __attribute__((always_inline))
-void _uatomic_link_error()
-{
-#ifdef ILLEGAL_INSTR
- /* generate an illegal instruction. Cannot catch this with linker tricks
- * when optimizations are disabled. */
- __asm__ __volatile__(ILLEGAL_INSTR);
-#else
- __builtin_trap ();
-#endif
-}
-
-#else /* #if !defined __OPTIMIZE__ || defined UATOMIC_NO_LINK_ERROR */
-extern void _uatomic_link_error ();
-#endif /* #else #if !defined __OPTIMIZE__ || defined UATOMIC_NO_LINK_ERROR */
-
-/* cmpxchg */
-
-#ifndef uatomic_cmpxchg
-static inline __attribute__((always_inline))
-unsigned long _uatomic_cmpxchg(void *addr, unsigned long old,
- unsigned long _new, int len)
-{
- switch (len) {
-#ifdef UATOMIC_HAS_ATOMIC_BYTE
- case 1:
- return __sync_val_compare_and_swap_1(addr, old, _new);
-#endif
-#ifdef UATOMIC_HAS_ATOMIC_SHORT
- case 2:
- return __sync_val_compare_and_swap_2(addr, old, _new);
-#endif
- case 4:
- return __sync_val_compare_and_swap_4(addr, old, _new);
-#if (CAA_BITS_PER_LONG == 64)
- case 8:
- return __sync_val_compare_and_swap_8(addr, old, _new);
-#endif
- }
- _uatomic_link_error();
- return 0;
-}
-
-
-#define uatomic_cmpxchg(addr, old, _new) \
- ((__typeof__(*(addr))) _uatomic_cmpxchg((addr), (unsigned long)(old),\
- (unsigned long)(_new), \
- sizeof(*(addr))))
-
-
-/* uatomic_and */
-
-#ifndef uatomic_and
-static inline __attribute__((always_inline))
-void _uatomic_and(void *addr, unsigned long val,
- int len)
-{
- switch (len) {
-#ifdef UATOMIC_HAS_ATOMIC_BYTE
- case 1:
- __sync_and_and_fetch_1(addr, val);
-#endif
-#ifdef UATOMIC_HAS_ATOMIC_SHORT
- case 2:
- __sync_and_and_fetch_2(addr, val);
-#endif
- case 4:
- __sync_and_and_fetch_4(addr, val);
-#if (CAA_BITS_PER_LONG == 64)
- case 8:
- __sync_and_and_fetch_8(addr, val);
-#endif
- }
- _uatomic_link_error();
- return 0;
-}
-
-#define uatomic_and(addr, v) \
- (_uatomic_and((addr), \
- (unsigned long)(v), \
- sizeof(*(addr))))
-#endif
-
-/* uatomic_or */
-
-#ifndef uatomic_or
-static inline __attribute__((always_inline))
-void _uatomic_or(void *addr, unsigned long val,
- int len)
-{
- switch (len) {
-#ifdef UATOMIC_HAS_ATOMIC_BYTE
- case 1:
- __sync_or_and_fetch_1(addr, val);
-#endif
-#ifdef UATOMIC_HAS_ATOMIC_SHORT
- case 2:
- __sync_or_and_fetch_2(addr, val);
-#endif
- case 4:
- __sync_or_and_fetch_4(addr, val);
-#if (CAA_BITS_PER_LONG == 64)
- case 8:
- __sync_or_and_fetch_8(addr, val);
-#endif
- }
- _uatomic_link_error();
- return 0;
-}
-
-#define uatomic_or(addr, v) \
- (_uatomic_or((addr), \
- (unsigned long)(v), \
- sizeof(*(addr))))
-#endif
-
-/* uatomic_add_return */
-
-#ifndef uatomic_add_return
-static inline __attribute__((always_inline))
-unsigned long _uatomic_add_return(void *addr, unsigned long val,
- int len)
-{
- switch (len) {
-#ifdef UATOMIC_HAS_ATOMIC_BYTE
- case 1:
- return __sync_add_and_fetch_1(addr, val);
-#endif
-#ifdef UATOMIC_HAS_ATOMIC_SHORT
- case 2:
- return __sync_add_and_fetch_2(addr, val);
-#endif
- case 4:
- return __sync_add_and_fetch_4(addr, val);
-#if (CAA_BITS_PER_LONG == 64)
- case 8:
- return __sync_add_and_fetch_8(addr, val);
-#endif
- }
- _uatomic_link_error();
- return 0;
-}
-
-
-#define uatomic_add_return(addr, v) \
- ((__typeof__(*(addr))) _uatomic_add_return((addr), \
- (unsigned long)(v), \
- sizeof(*(addr))))
-#endif /* #ifndef uatomic_add_return */
-
-#ifndef uatomic_xchg
-/* xchg */
-
-static inline __attribute__((always_inline))
-unsigned long _uatomic_exchange(void *addr, unsigned long val, int len)
-{
- switch (len) {
-#ifdef UATOMIC_HAS_ATOMIC_BYTE
- case 1:
- {
- unsigned char old;
-
- do {
- old = uatomic_read((unsigned char *)addr);
- } while (!__sync_bool_compare_and_swap_1(addr, old, val));
-
- return old;
- }
-#endif
-#ifdef UATOMIC_HAS_ATOMIC_SHORT
- case 2:
- {
- unsigned short old;
-
- do {
- old = uatomic_read((unsigned short *)addr);
- } while (!__sync_bool_compare_and_swap_2(addr, old, val));
-
- return old;
- }
-#endif
- case 4:
- {
- unsigned int old;
-
- do {
- old = uatomic_read((unsigned int *)addr);
- } while (!__sync_bool_compare_and_swap_4(addr, old, val));
-
- return old;
- }
-#if (CAA_BITS_PER_LONG == 64)
- case 8:
- {
- unsigned long old;
-
- do {
- old = uatomic_read((unsigned long *)addr);
- } while (!__sync_bool_compare_and_swap_8(addr, old, val));
-
- return old;
- }
-#endif
- }
- _uatomic_link_error();
- return 0;
-}
-
-#define uatomic_xchg(addr, v) \
- ((__typeof__(*(addr))) _uatomic_exchange((addr), (unsigned long)(v), \
- sizeof(*(addr))))
-#endif /* #ifndef uatomic_xchg */
-
-#else /* #ifndef uatomic_cmpxchg */
-
-#ifndef uatomic_and
-/* uatomic_and */
-
-static inline __attribute__((always_inline))
-void _uatomic_and(void *addr, unsigned long val, int len)
-{
- switch (len) {
-#ifdef UATOMIC_HAS_ATOMIC_BYTE
- case 1:
- {
- unsigned char old, oldt;
-
- oldt = uatomic_read((unsigned char *)addr);
- do {
- old = oldt;
- oldt = _uatomic_cmpxchg(addr, old, old & val, 1);
- } while (oldt != old);
- }
-#endif
-#ifdef UATOMIC_HAS_ATOMIC_SHORT
- case 2:
- {
- unsigned short old, oldt;
-
- oldt = uatomic_read((unsigned short *)addr);
- do {
- old = oldt;
- oldt = _uatomic_cmpxchg(addr, old, old & val, 2);
- } while (oldt != old);
- }
-#endif
- case 4:
- {
- unsigned int old, oldt;
-
- oldt = uatomic_read((unsigned int *)addr);
- do {
- old = oldt;
- oldt = _uatomic_cmpxchg(addr, old, old & val, 4);
- } while (oldt != old);
- }
-#if (CAA_BITS_PER_LONG == 64)
- case 8:
- {
- unsigned long old, oldt;
-
- oldt = uatomic_read((unsigned long *)addr);
- do {
- old = oldt;
- oldt = _uatomic_cmpxchg(addr, old, old & val, 8);
- } while (oldt != old);
- }
-#endif
- }
- _uatomic_link_error();
- return 0;
-}
-
-#define uatomic_and(addr, v) \
- (uatomic_and((addr), \
- (unsigned long)(v), \
- sizeof(*(addr))))
-#endif /* #ifndef uatomic_and */
-
-#ifndef uatomic_or
-/* uatomic_or */
-
-static inline __attribute__((always_inline))
-void _uatomic_or(void *addr, unsigned long val, int len)
-{
- switch (len) {
-#ifdef UATOMIC_HAS_ATOMIC_BYTE
- case 1:
- {
- unsigned char old, oldt;
-
- oldt = uatomic_read((unsigned char *)addr);
- do {
- old = oldt;
- oldt = _uatomic_cmpxchg(addr, old, old | val, 1);
- } while (oldt != old);
- }
-#endif
-#ifdef UATOMIC_HAS_ATOMIC_SHORT
- case 2:
- {
- unsigned short old, oldt;
-
- oldt = uatomic_read((unsigned short *)addr);
- do {
- old = oldt;
- oldt = _uatomic_cmpxchg(addr, old, old | val, 2);
- } while (oldt != old);
- }
-#endif
- case 4:
- {
- unsigned int old, oldt;
-
- oldt = uatomic_read((unsigned int *)addr);
- do {
- old = oldt;
- oldt = _uatomic_cmpxchg(addr, old, old | val, 4);
- } while (oldt != old);
- }
-#if (CAA_BITS_PER_LONG == 64)
- case 8:
- {
- unsigned long old, oldt;
-
- oldt = uatomic_read((unsigned long *)addr);
- do {
- old = oldt;
- oldt = _uatomic_cmpxchg(addr, old, old | val, 8);
- } while (oldt != old);
- }
-#endif
- }
- _uatomic_link_error();
- return 0;
-}
-
-#define uatomic_or(addr, v) \
- (uatomic_or((addr), \
- (unsigned long)(v), \
- sizeof(*(addr))))
-#endif /* #ifndef uatomic_or */
-
-#ifndef uatomic_add_return
-/* uatomic_add_return */
-
-static inline __attribute__((always_inline))
-unsigned long _uatomic_add_return(void *addr, unsigned long val, int len)
-{
- switch (len) {
-#ifdef UATOMIC_HAS_ATOMIC_BYTE
- case 1:
- {
- unsigned char old, oldt;
-
- oldt = uatomic_read((unsigned char *)addr);
- do {
- old = oldt;
- oldt = uatomic_cmpxchg((unsigned char *)addr,
- old, old + val);
- } while (oldt != old);
-
- return old + val;
- }
-#endif
-#ifdef UATOMIC_HAS_ATOMIC_SHORT
- case 2:
- {
- unsigned short old, oldt;
-
- oldt = uatomic_read((unsigned short *)addr);
- do {
- old = oldt;
- oldt = uatomic_cmpxchg((unsigned short *)addr,
- old, old + val);
- } while (oldt != old);
-
- return old + val;
- }
-#endif
- case 4:
- {
- unsigned int old, oldt;
-
- oldt = uatomic_read((unsigned int *)addr);
- do {
- old = oldt;
- oldt = uatomic_cmpxchg((unsigned int *)addr,
- old, old + val);
- } while (oldt != old);
-
- return old + val;
- }
-#if (CAA_BITS_PER_LONG == 64)
- case 8:
- {
- unsigned long old, oldt;
-
- oldt = uatomic_read((unsigned long *)addr);
- do {
- old = oldt;
- oldt = uatomic_cmpxchg((unsigned long *)addr,
- old, old + val);
- } while (oldt != old);
-
- return old + val;
- }
-#endif
- }
- _uatomic_link_error();
- return 0;
-}
-
-#define uatomic_add_return(addr, v) \
- ((__typeof__(*(addr))) _uatomic_add_return((addr), \
- (unsigned long)(v), \
- sizeof(*(addr))))
-#endif /* #ifndef uatomic_add_return */
-
-#ifndef uatomic_xchg
-/* xchg */
-
-static inline __attribute__((always_inline))
-unsigned long _uatomic_exchange(void *addr, unsigned long val, int len)
-{
- switch (len) {
-#ifdef UATOMIC_HAS_ATOMIC_BYTE
- case 1:
- {
- unsigned char old, oldt;
-
- oldt = uatomic_read((unsigned char *)addr);
- do {
- old = oldt;
- oldt = uatomic_cmpxchg((unsigned char *)addr,
- old, val);
- } while (oldt != old);
-
- return old;
- }
-#endif
-#ifdef UATOMIC_HAS_ATOMIC_SHORT
- case 2:
- {
- unsigned short old, oldt;
-
- oldt = uatomic_read((unsigned short *)addr);
- do {
- old = oldt;
- oldt = uatomic_cmpxchg((unsigned short *)addr,
- old, val);
- } while (oldt != old);
-
- return old;
- }
-#endif
- case 4:
- {
- unsigned int old, oldt;
-
- oldt = uatomic_read((unsigned int *)addr);
- do {
- old = oldt;
- oldt = uatomic_cmpxchg((unsigned int *)addr,
- old, val);
- } while (oldt != old);
-
- return old;
- }
-#if (CAA_BITS_PER_LONG == 64)
- case 8:
- {
- unsigned long old, oldt;
-
- oldt = uatomic_read((unsigned long *)addr);
- do {
- old = oldt;
- oldt = uatomic_cmpxchg((unsigned long *)addr,
- old, val);
- } while (oldt != old);
-
- return old;
- }
-#endif
- }
- _uatomic_link_error();
- return 0;
-}
-
-#define uatomic_xchg(addr, v) \
- ((__typeof__(*(addr))) _uatomic_exchange((addr), (unsigned long)(v), \
- sizeof(*(addr))))
-#endif /* #ifndef uatomic_xchg */
-
-#endif /* #else #ifndef uatomic_cmpxchg */
-
-/* uatomic_sub_return, uatomic_add, uatomic_sub, uatomic_inc, uatomic_dec */
-
-#ifndef uatomic_add
-#define uatomic_add(addr, v) (void)uatomic_add_return((addr), (v))
-#endif
-
-#define uatomic_sub_return(addr, v) uatomic_add_return((addr), -(v))
-#define uatomic_sub(addr, v) uatomic_add((addr), -(v))
-
-#ifndef uatomic_inc
-#define uatomic_inc(addr) uatomic_add((addr), 1)
-#endif
-
-#ifndef uatomic_dec
-#define uatomic_dec(addr) uatomic_add((addr), -1)
-#endif
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /* _URCU_UATOMIC_GENERIC_H */
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