X-Git-Url: http://git.lttng.org./?a=blobdiff_plain;f=urcu%2Fcompiler.h;h=2f32b38d6fb1850291ebd500f0a2fdca53f5c428;hb=HEAD;hp=aab2c5cdd7bff1c590896f0add675ba3435fcc3a;hpb=f540a0fdac1fb71bba34c6aafff55f0e2fce7877;p=userspace-rcu.git diff --git a/urcu/compiler.h b/urcu/compiler.h deleted file mode 100644 index aab2c5c..0000000 --- a/urcu/compiler.h +++ /dev/null @@ -1,50 +0,0 @@ -#ifndef _URCU_COMPILER_H -#define _URCU_COMPILER_H - -/* - * compiler.h - * - * Compiler definitions. - * - * Copyright (c) 2009 Mathieu Desnoyers - * - * 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. - */ - -#include /* for offsetof */ - -#define likely(x) __builtin_expect(!!(x), 1) -#define unlikely(x) __builtin_expect(!!(x), 0) - -#define barrier() asm volatile("" : : : "memory") - -/* - * Instruct the compiler to perform only a single access to a variable - * (prohibits merging and refetching). The compiler is also forbidden to reorder - * successive instances of ACCESS_ONCE(), but only when the compiler is aware of - * particular ordering. Compiler ordering can be ensured, for example, by - * putting two ACCESS_ONCE() in separate C statements. - * - * This macro does absolutely -nothing- to prevent the CPU from reordering, - * merging, or refetching absolutely anything at any time. Its main intended - * use is to mediate communication between process-level code and irq/NMI - * handlers, all running on the same CPU. - */ -#define ACCESS_ONCE(x) (*(volatile typeof(x) *)&x) - -#ifndef max -#define max(a,b) ((a)>(b)?(a):(b)) -#endif - -#ifndef min -#define min(a,b) ((a)<(b)?(a):(b)) -#endif - -#endif /* _URCU_COMPILER_H */