X-Git-Url: https://git.kernel.dk/?a=blobdiff_plain;f=compiler%2Fcompiler.h;h=20df21d050c3ba7941e705bf51140430dd7b237a;hb=a6415d76bd7256a5b9fccc51858da776b3c513aa;hp=e1afcb424b8efa06380311cd1e865df3fb6f0d64;hpb=ff8039b745d59ede0ce9245ed24da14ecf2d3f38;p=fio.git

diff --git a/compiler/compiler.h b/compiler/compiler.h
index e1afcb42..20df21d0 100644
--- a/compiler/compiler.h
+++ b/compiler/compiler.h
@@ -1,5 +1,6 @@
 #ifndef FIO_COMPILER_H
 #define FIO_COMPILER_H
+#include <assert.h>
 
 #if __GNUC__ >= 4
 #include "compiler-gcc4.h"
@@ -33,4 +34,39 @@
 	1; \
 })
 
+
+#if defined(CONFIG_STATIC_ASSERT)
+#define compiletime_assert(condition, msg) _Static_assert(condition, msg)
+
+#elif !defined(CONFIG_DISABLE_OPTIMIZATIONS)
+
+#ifndef __compiletime_error
+#define __compiletime_error(message)
+#endif
+
+#ifndef __compiletime_error_fallback
+#define __compiletime_error_fallback(condition)	do { } while (0)
+#endif
+
+#define __compiletime_assert(condition, msg, prefix, suffix)		\
+	do {								\
+		int __cond = !(condition);				\
+		extern void prefix ## suffix(void) __compiletime_error(msg); \
+		if (__cond)						\
+			prefix ## suffix();				\
+		__compiletime_error_fallback(__cond);			\
+	} while (0)
+
+#define _compiletime_assert(condition, msg, prefix, suffix) \
+	__compiletime_assert(condition, msg, prefix, suffix)
+
+#define compiletime_assert(condition, msg) \
+	_compiletime_assert(condition, msg, __compiletime_assert_, __LINE__)
+
+#else
+
+#define compiletime_assert(condition, msg)	do { } while (0)
+
+#endif
+
 #endif