/*
- * Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013 Nicira, Inc.
+ * Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014 Nicira, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
#ifndef UTIL_H
#define UTIL_H 1
+#include <inttypes.h>
#include <limits.h>
#include <stdarg.h>
#include <stdbool.h>
/* Returns X rounded up to the nearest multiple of Y. */
#define ROUND_UP(X, Y) (DIV_ROUND_UP(X, Y) * (Y))
+/* Returns the least number that, when added to X, yields a multiple of Y. */
+#define PAD_SIZE(X, Y) (ROUND_UP(X, Y) - (X))
+
/* Returns X rounded down to the nearest multiple of Y. */
#define ROUND_DOWN(X, Y) ((X) / (Y) * (Y))
#define RDP2_4(X) (RDP2_5(X) | (RDP2_5(X) >> 2))
#define RDP2_5(X) ( (X) | ( (X) >> 1))
+/* This system's cache line size, in bytes.
+ * Being wrong hurts performance but not correctness. */
+#define CACHE_LINE_SIZE 64
+BUILD_ASSERT_DECL(IS_POW2(CACHE_LINE_SIZE));
+
#ifndef MIN
#define MIN(X, Y) ((X) < (Y) ? (X) : (Y))
#endif
char *xvasprintf(const char *format, va_list) PRINTF_FORMAT(1, 0) MALLOC_LIKE;
void *x2nrealloc(void *p, size_t *n, size_t s);
+void *xmalloc_cacheline(size_t) MALLOC_LIKE;
+void *xzalloc_cacheline(size_t) MALLOC_LIKE;
+void free_cacheline(void *);
+
void ovs_strlcpy(char *dst, const char *src, size_t size);
void ovs_strzcpy(char *dst, const char *src, size_t size);
uint64_t bitwise_get(const void *src, unsigned int src_len,
unsigned int src_ofs, unsigned int n_bits);
+void xsleep(unsigned int seconds);
#ifdef _WIN32
\f
char *ovs_format_message(int error);
char *ovs_lasterror_to_string(void);
+int ftruncate(int fd, off_t length);
#endif
#ifdef __cplusplus