X-Git-Url: http://git.lttng.org./?a=blobdiff_plain;f=urcu%2Fuatomic_arch_x86.h;h=dfb58763a37259b88a8962f9bd607767d5c59a3a;hb=c4c181795ea4f221c12c0c5aed5d89471c55be99;hp=43de9e6be5543bb90811f373007b0fa88b6f1af6;hpb=48d848c7291ec22da6258ac03cd9c1dafec1fdfb;p=urcu.git

diff --git a/urcu/uatomic_arch_x86.h b/urcu/uatomic_arch_x86.h
index 43de9e6..dfb5876 100644
--- a/urcu/uatomic_arch_x86.h
+++ b/urcu/uatomic_arch_x86.h
@@ -397,4 +397,26 @@ void _uatomic_dec(void *addr, int len)
 
 #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
+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))))
+
+extern unsigned long _compat_uatomic_cmpxchg(void *addr, unsigned long old,
+			      unsigned long _new, int len);
+
+#define compat_uatomic_cmpxchg(addr, old, _new)				     \
+	((__typeof__(*(addr))) _uatomic_cmpxchg((addr), (unsigned long)(old),\
+						(unsigned long)(_new), 	     \
+						sizeof(*(addr))))
+#endif
+
 #endif /* _URCU_ARCH_UATOMIC_X86_H */