/*
- * Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016 Nicira, Inc.
+ * Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017 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 <sys/types.h>
+#include <netinet/in.h>
#include <arpa/inet.h>
#include <inttypes.h>
#include <limits.h>
+#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "compiler.h"
+#include "util.h"
#include "openvswitch/util.h"
+#if defined(__aarch64__) && __GNUC__ >= 6
+#include <arm_neon.h>
+#endif
extern char *program_name;
#define __ARRAY_SIZE_NOCHECK(ARRAY) (sizeof(ARRAY) / sizeof((ARRAY)[0]))
-#ifdef __GNUC__
+#if __GNUC__ && !defined(__cplusplus)
/* return 0 for array types, 1 otherwise */
#define __ARRAY_CHECK(ARRAY) \
!__builtin_types_compatible_p(typeof(ARRAY), typeof(&ARRAY[0]))
#define __ARRAY_SIZE(ARRAY) \
__builtin_choose_expr(__ARRAY_CHECK(ARRAY), \
__ARRAY_SIZE_NOCHECK(ARRAY), __ARRAY_FAIL(ARRAY))
+#elif defined(__cplusplus)
+#define __ARRAY_SIZE(ARRAY) ( \
+ 0 * sizeof(reinterpret_cast<const ::Bad_arg_to_ARRAY_SIZE *>(ARRAY)) + \
+ 0 * sizeof(::Bad_arg_to_ARRAY_SIZE::check_type((ARRAY), &(ARRAY))) + \
+ sizeof(ARRAY) / sizeof((ARRAY)[0]) )
+
+struct Bad_arg_to_ARRAY_SIZE {
+ class Is_pointer;
+ class Is_array {};
+ template <typename T>
+ static Is_pointer check_type(const T *, const T * const *);
+ static Is_array check_type(const void *, const void *);
+};
#else
#define __ARRAY_SIZE(ARRAY) __ARRAY_SIZE_NOCHECK(ARRAY)
#endif
#define CACHE_LINE_SIZE 64
BUILD_ASSERT_DECL(IS_POW2(CACHE_LINE_SIZE));
+/* Cacheline marking is typically done using zero-sized array.
+ * However MSVC doesn't like zero-sized array in struct/union.
+ * C4200: https://msdn.microsoft.com/en-us/library/79wf64bc.aspx
+ */
+typedef uint8_t OVS_CACHE_LINE_MARKER[1];
+
static inline void
ovs_prefetch_range(const void *start, size_t size)
{
#define MAX(X, Y) ((X) > (Y) ? (X) : (Y))
#endif
+/* Comparisons for ints with modular arithmetic */
+#define INT_MOD_LT(a,b) ((int) ((a)-(b)) < 0)
+#define INT_MOD_LEQ(a,b) ((int) ((a)-(b)) <= 0)
+#define INT_MOD_GT(a,b) ((int) ((a)-(b)) > 0)
+#define INT_MOD_GEQ(a,b) ((int) ((a)-(b)) >= 0)
+
+#define INT_MOD_MIN(a, b) ((INT_MOD_LT(a, b)) ? (a) : (b))
+#define INT_MOD_MAX(a, b) ((INT_MOD_GT(a, b)) ? (a) : (b))
+
#define OVS_NOT_REACHED() abort()
/* Use "%"PRIuSIZE to format size_t with printf(). */
const char *get_subprogram_name(void);
void set_subprogram_name(const char *);
+unsigned int get_page_size(void);
+long long int get_boot_time(void);
+
+void ctl_timeout_setup(unsigned int secs);
+
void ovs_print_version(uint8_t min_ofp, uint8_t max_ofp);
+void set_memory_locked(void);
+bool memory_locked(void);
+
OVS_NO_RETURN void out_of_memory(void);
void *xmalloc(size_t) MALLOC_LIKE;
void *xcalloc(size_t, size_t) MALLOC_LIKE;
void *xmemdup(const void *, size_t) MALLOC_LIKE;
char *xmemdup0(const char *, size_t) MALLOC_LIKE;
char *xstrdup(const char *) MALLOC_LIKE;
+char *nullable_xstrdup(const char *) MALLOC_LIKE;
+bool nullable_string_is_equal(const char *a, const char *b);
char *xasprintf(const char *format, ...) OVS_PRINTF_FORMAT(1, 2) MALLOC_LIKE;
char *xvasprintf(const char *format, va_list) OVS_PRINTF_FORMAT(1, 0) MALLOC_LIKE;
void *x2nrealloc(void *p, size_t *n, size_t s);
void ovs_strlcpy(char *dst, const char *src, size_t size);
void ovs_strzcpy(char *dst, const char *src, size_t size);
+int string_ends_with(const char *str, const char *suffix);
+
+void *xmalloc_pagealign(size_t) MALLOC_LIKE;
+void free_pagealign(void *);
+void *xmalloc_size_align(size_t, size_t) MALLOC_LIKE;
+void free_size_align(void *);
+
+/* The C standards say that neither the 'dst' nor 'src' argument to
+ * memcpy() may be null, even if 'n' is zero. This wrapper tolerates
+ * the null case. */
+static inline void
+nullable_memcpy(void *dst, const void *src, size_t n)
+{
+ if (n) {
+ memcpy(dst, src, n);
+ }
+}
+
+/* The C standards say that the 'dst' argument to memset may not be
+ * null, even if 'n' is zero. This wrapper tolerates the null case. */
+static inline void
+nullable_memset(void *dst, int c, size_t n)
+{
+ if (n) {
+ memset(dst, c, n);
+ }
+}
+
+/* Copy string SRC to DST, but no more bytes than the shorter of DST or SRC.
+ * DST and SRC must both be char arrays, not pointers, and with GNU C, this
+ * raises a compiler error if either DST or SRC is a pointer instead of an
+ * array. */
+#define ovs_strlcpy_arrays(DST, SRC) \
+ ovs_strlcpy(DST, SRC, MIN(ARRAY_SIZE(DST), ARRAY_SIZE(SRC)))
+
OVS_NO_RETURN void ovs_abort(int err_no, const char *format, ...)
OVS_PRINTF_FORMAT(2, 3);
OVS_NO_RETURN void ovs_abort_valist(int err_no, const char *format, va_list)
bool str_to_int(const char *, int base, int *);
bool str_to_long(const char *, int base, long *);
bool str_to_llong(const char *, int base, long long *);
+bool str_to_llong_with_tail(const char *, char **, int base, long long *);
bool str_to_uint(const char *, int base, unsigned int *);
+bool str_to_ullong(const char *, int base, unsigned long long *);
+bool str_to_llong_range(const char *, int base, long long *, long long *);
bool ovs_scan(const char *s, const char *format, ...) OVS_SCANF_FORMAT(2, 3);
bool ovs_scan_len(const char *s, int *n, const char *format, ...);
bool str_to_double(const char *, double *);
-int hexit_value(int c);
+int hexit_value(unsigned char c);
uintmax_t hexits_value(const char *s, size_t n, bool *ok);
int parse_int_string(const char *s, uint8_t *valuep, int field_width,
char *base_name(const char *file_name);
#endif
char *abs_file_name(const char *dir, const char *file_name);
+bool is_file_name_absolute(const char *);
char *follow_symlinks(const char *filename);
static inline unsigned int
count_1bits(uint64_t x)
{
-#if __GNUC__ >= 4 && __POPCNT__
+#if (__GNUC__ >= 4 && __POPCNT__) || (defined(__aarch64__) && __GNUC__ >= 7)
return __builtin_popcountll(x);
+#elif defined(__aarch64__) && __GNUC__ >= 6
+ return vaddv_u8(vcnt_u8(vcreate_u8(x)));
#else
/* This portable implementation is the fastest one we know of for 64
* bits, and about 3x faster than GCC 4.7 __builtin_popcountll(). */
return htonl((uint64_t)UINT32_MAX << (32 - plen));
}
\f
+/* Returns true if the 1-bits in 'super' are a superset of the 1-bits in 'sub',
+ * false otherwise. */
+static inline bool
+uint_is_superset(uintmax_t super, uintmax_t sub)
+{
+ return (super & sub) == sub;
+}
+
+/* Returns true if the 1-bits in 'super' are a superset of the 1-bits in 'sub',
+ * false otherwise. */
+static inline bool
+be16_is_superset(ovs_be16 super, ovs_be16 sub)
+{
+ return (super & sub) == sub;
+}
+
+/* Returns true if the 1-bits in 'super' are a superset of the 1-bits in 'sub',
+ * false otherwise. */
+static inline bool
+be32_is_superset(ovs_be32 super, ovs_be32 sub)
+{
+ return (super & sub) == sub;
+}
+
+/* Returns true if the 1-bits in 'super' are a superset of the 1-bits in 'sub',
+ * false otherwise. */
+static inline bool
+be64_is_superset(ovs_be64 super, ovs_be64 sub)
+{
+ return (super & sub) == sub;
+}
+\f
bool is_all_zeros(const void *, size_t);
bool is_all_ones(const void *, size_t);
+bool is_all_byte(const void *, size_t, uint8_t byte);
+void or_bytes(void *dst, const void *src, size_t n);
void bitwise_copy(const void *src, unsigned int src_len, unsigned int src_ofs,
void *dst, unsigned int dst_len, unsigned int dst_ofs,
unsigned int n_bits);
/* Returns non-zero if the parameters have equal value. */
static inline int
-ovs_u128_equals(const ovs_u128 *a, const ovs_u128 *b)
+ovs_u128_equals(const ovs_u128 a, const ovs_u128 b)
{
- return (a->u64.hi == b->u64.hi) && (a->u64.lo == b->u64.lo);
+ return (a.u64.hi == b.u64.hi) && (a.u64.lo == b.u64.lo);
}
/* Returns true if 'val' is 0. */
static inline bool
-ovs_u128_is_zero(const ovs_u128 *val)
+ovs_u128_is_zero(const ovs_u128 val)
{
- return !(val->u64.hi || val->u64.lo);
+ return !(val.u64.hi || val.u64.lo);
}
/* Returns true if 'val' is all ones. */
static inline bool
-ovs_u128_is_ones(const ovs_u128 *val)
+ovs_u128_is_ones(const ovs_u128 val)
{
- return ovs_u128_equals(val, &OVS_U128_MAX);
+ return ovs_u128_equals(val, OVS_U128_MAX);
}
/* Returns non-zero if the parameters have equal value. */
static inline int
-ovs_be128_equals(const ovs_be128 *a, const ovs_be128 *b)
+ovs_be128_equals(const ovs_be128 a, const ovs_be128 b)
{
- return (a->be64.hi == b->be64.hi) && (a->be64.lo == b->be64.lo);
+ return (a.be64.hi == b.be64.hi) && (a.be64.lo == b.be64.lo);
}
/* Returns true if 'val' is 0. */
static inline bool
-ovs_be128_is_zero(const ovs_be128 *val)
+ovs_be128_is_zero(const ovs_be128 val)
{
- return !(val->be64.hi || val->be64.lo);
+ return !(val.be64.hi || val.be64.lo);
}
static inline ovs_u128
return dst;
}
+static inline bool
+ovs_be128_is_superset(ovs_be128 super, ovs_be128 sub)
+{
+ return (be64_is_superset(super.be64.hi, sub.be64.hi) &&
+ be64_is_superset(super.be64.lo, sub.be64.lo));
+}
+
+static inline bool
+ovs_u128_is_superset(ovs_u128 super, ovs_u128 sub)
+{
+ return (uint_is_superset(super.u64.hi, sub.u64.hi) &&
+ uint_is_superset(super.u64.lo, sub.u64.lo));
+}
+
void xsleep(unsigned int seconds);
+void xnanosleep(uint64_t nanoseconds);
bool is_stdout_a_tty(void);
projects / mirror_ovs.git / blobdiff