urcu-bp: do not call munmap for NULL registry at exit

[urcu.git] / urcu / compiler.h

diff --git a/urcu/compiler.h b/urcu/compiler.h
index 64d12d344a26a1fdca56fd0b1201437241b9967a..489677b3aefe1ad6dd294006d903721f375f66a7 100644 (file)
--- a/urcu/compiler.h
+++ b/urcu/compiler.h
@@ -39,12 +39,12 @@
  */
 #define CMM_ACCESS_ONCE(x)     (*(volatile typeof(x) *)&(x))
 
-#ifndef max
-#define max(a,b) ((a)>(b)?(a):(b))
+#ifndef caa_max
+#define caa_max(a,b) ((a)>(b)?(a):(b))
 #endif
 
-#ifndef min
-#define min(a,b) ((a)<(b)?(a):(b))
+#ifndef caa_min
+#define caa_min(a,b) ((a)<(b)?(a):(b))
 #endif
 
 #if defined(__SIZEOF_LONG__)
@@ -61,4 +61,7 @@
                (type *)((char *)__ptr - offsetof(type, member));       \
        })
 
+#define CAA_BUILD_BUG_ON_ZERO(cond) (sizeof(struct { int:-!!(cond); }))
+#define CAA_BUILD_BUG_ON(cond) ((void)BUILD_BUG_ON_ZERO(cond))
+
 #endif /* _URCU_COMPILER_H */