1 files changed, 72 insertions, 0 deletions
diff --git a/kern/macros.h b/kern/macros.h
new file mode 100644
index 0000000..fb8dc5e
--- /dev/null
+++ b/kern/macros.h
@@ -0,0 +1,72 @@
+/*
+ * Copyright (c) 2009, 2010, 2013 Richard Braun.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ *
+ * Helper macros.
+ */
+
+#ifndef _KERN_MACROS_H
+#define _KERN_MACROS_H
+
+#define MACRO_BEGIN         ({
+#define MACRO_END           })
+#define	MACRO_RETURN	if (1) return
+
+#define __QUOTE(x)          #x
+#define QUOTE(x)            __QUOTE(x)
+
+#ifdef __ASSEMBLER__
+#define DECL_CONST(x, s)    x
+#else /* __ASSEMBLER__ */
+#define __DECL_CONST(x, s)  x##s
+#define DECL_CONST(x, s)    __DECL_CONST(x, s)
+#endif /* __ASSEMBLER__ */
+
+#define STRLEN(x)           (sizeof(x) - 1)
+#define ARRAY_SIZE(x)       (sizeof(x) / sizeof((x)[0]))
+
+#define MIN(a, b)           ((a) < (b) ? (a) : (b))
+#define MAX(a, b)           ((a) > (b) ? (a) : (b))
+
+#define DIV_CEIL(n, d)      (((n) + (d) - 1) / (d))
+
+#define P2ALIGNED(x, a)     (((x) & ((a) - 1)) == 0)
+#define ISP2(x)             P2ALIGNED(x, x)
+#define P2ALIGN(x, a)       ((x) & -(a))
+#define P2ROUND(x, a)       (-(-(x) & -(a)))
+#define P2END(x, a)         (-(~(x) & -(a)))
+
+#define structof(ptr, type, member) \
+    ((type *)((char *)(ptr) - offsetof(type, member)))
+
+#define alignof(x)          __alignof__(x)
+
+#define likely(expr)        __builtin_expect(!!(expr), 1)
+#define unlikely(expr)      __builtin_expect(!!(expr), 0)
+
+#define barrier()           asm volatile("" : : : "memory")
+
+#define __noreturn          __attribute__((noreturn))
+#define __aligned(x)        __attribute__((aligned(x)))
+#define __always_inline     inline __attribute__((always_inline))
+#define __section(x)        __attribute__((section(x)))
+#define __packed            __attribute__((packed))
+#define __alias(x)          __attribute__((alias(x)))
+
+#define __format_printf(fmt, args) \
+    __attribute__((format(printf, fmt, args)))
+
+#endif /* _KERN_MACROS_H */