X-Git-Url: https://git.liburcu.org/?p=urcu.git;a=blobdiff_plain;f=urcu%2Fuatomic_arch_x86.h;h=dfb58763a37259b88a8962f9bd607767d5c59a3a;hp=fccea8e2d350321ebe9cbf4517a68866e4b5fa19;hb=e156285068a631eaafa643d9e930b31780468d00;hpb=7d413817f09b2d17b1a79ea012590609ffab5eb6

diff --git a/urcu/uatomic_arch_x86.h b/urcu/uatomic_arch_x86.h
index fccea8e..dfb5876 100644
--- a/urcu/uatomic_arch_x86.h
+++ b/urcu/uatomic_arch_x86.h
@@ -402,7 +402,13 @@ void _uatomic_dec(void *addr, int len)
 #define compat_uatomic_cmpxchg(ptr, old, _new)	uatomic_cmpxchg(ptr, old, _new)
 #else
 extern int __urcu_cas_avail;
-#define URCU_CAS_AVAIL()	__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);