*/
#include <urcu/compiler.h>
+#include <urcu/system.h>
+
+#ifndef __SIZEOF_LONG__
+#if defined(__x86_64__) || defined(__amd64__)
+#define __SIZEOF_LONG__ 8
+#else
+#define __SIZEOF_LONG__ 4
+#endif
+#endif
#ifndef BITS_PER_LONG
#define BITS_PER_LONG (__SIZEOF_LONG__ * 8)
};
#define __hp(x) ((struct __uatomic_dummy *)(x))
-#define uatomic_set(addr, v) \
-do { \
- ACCESS_ONCE(*(addr)) = (v); \
-} while (0)
-
-#define uatomic_read(addr) ACCESS_ONCE(*(addr))
+#define _uatomic_set(addr, v) STORE_SHARED(*(addr), (v))
+#define _uatomic_read(addr) LOAD_SHARED(*(addr))
/* cmpxchg */
static inline __attribute__((always_inline))
-unsigned long _uatomic_cmpxchg(void *addr, unsigned long old,
+unsigned long __uatomic_cmpxchg(void *addr, unsigned long old,
unsigned long _new, int len)
{
switch (len) {
return 0;
}
-#define uatomic_cmpxchg(addr, old, _new) \
- ((__typeof__(*(addr))) _uatomic_cmpxchg((addr), (unsigned long)(old),\
- (unsigned long)(_new), \
+#define _uatomic_cmpxchg(addr, old, _new) \
+ ((__typeof__(*(addr))) __uatomic_cmpxchg((addr), (unsigned long)(old),\
+ (unsigned long)(_new), \
sizeof(*(addr))))
/* xchg */
static inline __attribute__((always_inline))
-unsigned long _uatomic_exchange(void *addr, unsigned long val, int len)
+unsigned long __uatomic_exchange(void *addr, unsigned long val, int len)
{
/* Note: the "xchg" instruction does not need a "lock" prefix. */
switch (len) {
return 0;
}
-#define uatomic_xchg(addr, v) \
- ((__typeof__(*(addr))) _uatomic_exchange((addr), (unsigned long)(v), \
+#define _uatomic_xchg(addr, v) \
+ ((__typeof__(*(addr))) __uatomic_exchange((addr), (unsigned long)(v), \
sizeof(*(addr))))
/* uatomic_add_return, uatomic_sub_return */
static inline __attribute__((always_inline))
-unsigned long _uatomic_add_return(void *addr, unsigned long val,
+unsigned long __uatomic_add_return(void *addr, unsigned long val,
int len)
{
switch (len) {
return 0;
}
-#define uatomic_add_return(addr, v) \
- ((__typeof__(*(addr))) _uatomic_add_return((addr), \
+#define _uatomic_add_return(addr, v) \
+ ((__typeof__(*(addr))) __uatomic_add_return((addr), \
(unsigned long)(v), \
sizeof(*(addr))))
-#define uatomic_sub_return(addr, v) uatomic_add_return((addr), -(v))
+#define _uatomic_sub_return(addr, v) _uatomic_add_return((addr), -(v))
/* uatomic_add, uatomic_sub */
static inline __attribute__((always_inline))
-void _uatomic_add(void *addr, unsigned long val, int len)
+void __uatomic_add(void *addr, unsigned long val, int len)
{
switch (len) {
case 1:
return;
}
-#define uatomic_add(addr, v) \
- (_uatomic_add((addr), (unsigned long)(v), sizeof(*(addr))))
+#define _uatomic_add(addr, v) \
+ (__uatomic_add((addr), (unsigned long)(v), sizeof(*(addr))))
-#define uatomic_sub(addr, v) uatomic_add((addr), -(v))
+#define _uatomic_sub(addr, v) _uatomic_add((addr), -(v))
/* uatomic_inc */
static inline __attribute__((always_inline))
-void _uatomic_inc(void *addr, int len)
+void __uatomic_inc(void *addr, int len)
{
switch (len) {
case 1:
return;
}
-#define uatomic_inc(addr) (_uatomic_inc((addr), sizeof(*(addr))))
+#define _uatomic_inc(addr) (__uatomic_inc((addr), sizeof(*(addr))))
/* uatomic_dec */
static inline __attribute__((always_inline))
-void _uatomic_dec(void *addr, int len)
+void __uatomic_dec(void *addr, int len)
{
switch (len) {
case 1:
return;
}
-#define uatomic_dec(addr) (_uatomic_dec((addr), sizeof(*(addr))))
+#define _uatomic_dec(addr) (__uatomic_dec((addr), sizeof(*(addr))))
-#if (BITS_PER_LONG == 64)
-#define URCU_CAS_AVAIL() 1
-#define compat_uatomic_cmpxchg(ptr, old, _new) uatomic_cmpxchg(ptr, old, _new)
-#else
+#if ((BITS_PER_LONG != 64) && defined(CONFIG_URCU_COMPAT_ARCH))
extern int __urcu_cas_avail;
extern int __urcu_cas_init(void);
-#define URCU_CAS_AVAIL() \
- ((likely(__urcu_cas_avail > 0)) ? \
- (1) : \
- ((unlikely(__urcu_cas_avail < 0) ? \
- (__urcu_cas_init()) : \
- (0))))
+
+#define UATOMIC_COMPAT(insn) \
+ ((likely(__urcu_cas_avail > 0)) \
+ ? (_uatomic_##insn) \
+ : ((unlikely(__urcu_cas_avail < 0) \
+ ? ((__urcu_cas_init() > 0) \
+ ? (_uatomic_##insn) \
+ : (compat_uatomic_##insn)) \
+ : (compat_uatomic_##insn))))
+
+extern unsigned long _compat_uatomic_set(void *addr,
+ unsigned long _new, int len);
+#define compat_uatomic_set(addr, _new) \
+ ((__typeof__(*(addr))) _compat_uatomic_set((addr), \
+ (unsigned long)(_new), \
+ sizeof(*(addr))))
+
+
+extern unsigned long _compat_uatomic_xchg(void *addr,
+ unsigned long _new, int len);
+#define compat_uatomic_xchg(addr, _new) \
+ ((__typeof__(*(addr))) _compat_uatomic_xchg((addr), \
+ (unsigned long)(_new), \
+ sizeof(*(addr))))
extern unsigned long _compat_uatomic_cmpxchg(void *addr, unsigned long old,
- unsigned long _new, int len);
+ unsigned long _new, int len);
+#define compat_uatomic_cmpxchg(addr, old, _new) \
+ ((__typeof__(*(addr))) _compat_uatomic_cmpxchg((addr), \
+ (unsigned long)(old), \
+ (unsigned long)(_new), \
+ sizeof(*(addr))))
-#define compat_uatomic_cmpxchg(addr, old, _new) \
- ((__typeof__(*(addr))) _uatomic_cmpxchg((addr), (unsigned long)(old),\
- (unsigned long)(_new), \
+extern unsigned long _compat_uatomic_xchg(void *addr,
+ unsigned long _new, int len);
+#define compat_uatomic_add_return(addr, v) \
+ ((__typeof__(*(addr))) _compat_uatomic_add_return((addr), \
+ (unsigned long)(v), \
sizeof(*(addr))))
+
+#define compat_uatomic_sub_return(addr, v) \
+ compat_uatomic_add_return((addr), -(v))
+#define compat_uatomic_add(addr, v) \
+ ((void)compat_uatomic_add_return((addr), (v)))
+#define compat_uatomic_sub(addr, v) \
+ ((void)compat_uatomic_sub_return((addr), (v)))
+#define compat_uatomic_inc(addr) \
+ (compat_uatomic_add((addr), 1))
+#define compat_uatomic_dec(addr) \
+ (compat_uatomic_sub((addr), 1))
+
+#else
+#define UATOMIC_COMPAT(insn) (_uatomic_##insn)
#endif
+/* Read is atomic even in compat mode */
+#define uatomic_read(addr) _uatomic_read(addr)
+
+#define uatomic_set(addr, v) \
+ UATOMIC_COMPAT(set(addr, v))
+#define uatomic_cmpxchg(addr, old, _new) \
+ UATOMIC_COMPAT(cmpxchg(addr, old, _new))
+#define uatomic_xchg(addr, v) \
+ UATOMIC_COMPAT(xchg(addr, v))
+#define uatomic_add_return(addr, v) \
+ UATOMIC_COMPAT(add_return(addr, v))
+#define uatomic_sub_return(addr, v) \
+ UATOMIC_COMPAT(sub_return(addr, v))
+#define uatomic_add(addr, v) UATOMIC_COMPAT(add(addr, v))
+#define uatomic_sub(addr, v) UATOMIC_COMPAT(sub(addr, v))
+#define uatomic_inc(addr) UATOMIC_COMPAT(inc(addr))
+#define uatomic_dec(addr) UATOMIC_COMPAT(dec(addr))
+
#endif /* _URCU_ARCH_UATOMIC_X86_H */
projects / urcu.git / blobdiff