2 * Copyright (c) 2008, 2009, 2010, 2011 Nicira Networks.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at:
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
30 #define va_copy __va_copy
32 #define va_copy(dst, src) ((dst) = (src))
37 /* Build-time assertion building block. */
38 #define BUILD_ASSERT__(EXPR) \
39 sizeof(struct { unsigned int build_assert_failed : (EXPR) ? 1 : -1; })
41 /* Build-time assertion for use in a statement context. */
42 #define BUILD_ASSERT(EXPR) (void) BUILD_ASSERT__(EXPR)
44 /* Build-time assertion for use in a declaration context. */
45 #define BUILD_ASSERT_DECL(EXPR) \
46 extern int (*build_assert(void))[BUILD_ASSERT__(EXPR)]
47 #else /* __cplusplus */
48 #include <boost/static_assert.hpp>
49 #define BUILD_ASSERT BOOST_STATIC_ASSERT
50 #define BUILD_ASSERT_DECL BOOST_STATIC_ASSERT
51 #endif /* __cplusplus */
53 extern const char *program_name;
55 /* Returns the number of elements in ARRAY. */
56 #define ARRAY_SIZE(ARRAY) (sizeof ARRAY / sizeof *ARRAY)
58 /* Returns X / Y, rounding up. X must be nonnegative to round correctly. */
59 #define DIV_ROUND_UP(X, Y) (((X) + ((Y) - 1)) / (Y))
61 /* Returns X rounded up to the nearest multiple of Y. */
62 #define ROUND_UP(X, Y) (DIV_ROUND_UP(X, Y) * (Y))
64 /* Returns X rounded down to the nearest multiple of Y. */
65 #define ROUND_DOWN(X, Y) ((X) / (Y) * (Y))
67 /* Returns true if X is a power of 2, otherwise false. */
68 #define IS_POW2(X) ((X) && !((X) & ((X) - 1)))
71 #define MIN(X, Y) ((X) < (Y) ? (X) : (Y))
75 #define MAX(X, Y) ((X) > (Y) ? (X) : (Y))
78 #define NOT_REACHED() abort()
80 /* Given a pointer-typed lvalue OBJECT, expands to a pointer type that may be
81 * assigned to OBJECT. */
83 #define OVS_TYPEOF(OBJECT) typeof(OBJECT)
85 #define OVS_TYPEOF(OBJECT) void *
88 /* Given OBJECT of type pointer-to-structure, expands to the offset of MEMBER
89 * within an instance of the structure.
91 * The GCC-specific version avoids the technicality of undefined behavior if
92 * OBJECT is null, invalid, or not yet initialized. This makes some static
93 * checkers (like Coverity) happier. But the non-GCC version does not actually
94 * dereference any pointer, so it would be surprising for it to cause any
95 * problems in practice.
98 #define OBJECT_OFFSETOF(OBJECT, MEMBER) offsetof(typeof(*(OBJECT)), MEMBER)
100 #define OBJECT_OFFSETOF(OBJECT, MEMBER) \
101 ((char *) &(OBJECT)->MEMBER - (char *) (OBJECT))
104 /* Given POINTER, the address of the given MEMBER in a STRUCT object, returns
105 the STRUCT object. */
106 #define CONTAINER_OF(POINTER, STRUCT, MEMBER) \
107 ((STRUCT *) (void *) ((char *) (POINTER) - offsetof (STRUCT, MEMBER)))
109 /* Given POINTER, the address of the given MEMBER within an object of the type
110 * that that OBJECT points to, returns OBJECT as an assignment-compatible
111 * pointer type (either the correct pointer type or "void *"). OBJECT must be
114 * This is the same as CONTAINER_OF except that it infers the structure type
115 * from the type of '*OBJECT'. */
116 #define OBJECT_CONTAINING(POINTER, OBJECT, MEMBER) \
117 ((OVS_TYPEOF(OBJECT)) (void *) \
118 ((char *) (POINTER) - OBJECT_OFFSETOF(OBJECT, MEMBER)))
120 /* Given POINTER, the address of the given MEMBER within an object of the type
121 * that that OBJECT points to, assigns the address of the outer object to
122 * OBJECT, which must be an lvalue.
125 #define ASSIGN_CONTAINER(OBJECT, POINTER, MEMBER) \
126 ((OBJECT) = OBJECT_CONTAINING(POINTER, OBJECT, MEMBER), 1)
132 void set_program_name(const char *);
134 void ovs_print_version(char *date, char *time,
135 uint8_t min_ofp, uint8_t max_ofp);
136 #define OVS_PRINT_VERSION(min_ofp, max_ofp) \
137 ovs_print_version(__DATE__, __TIME__, (min_ofp), (max_ofp))
139 void out_of_memory(void) NO_RETURN;
140 void *xmalloc(size_t) MALLOC_LIKE;
141 void *xcalloc(size_t, size_t) MALLOC_LIKE;
142 void *xzalloc(size_t) MALLOC_LIKE;
143 void *xrealloc(void *, size_t);
144 void *xmemdup(const void *, size_t) MALLOC_LIKE;
145 char *xmemdup0(const char *, size_t) MALLOC_LIKE;
146 char *xstrdup(const char *) MALLOC_LIKE;
147 char *xasprintf(const char *format, ...) PRINTF_FORMAT(1, 2) MALLOC_LIKE;
148 char *xvasprintf(const char *format, va_list) PRINTF_FORMAT(1, 0) MALLOC_LIKE;
149 void *x2nrealloc(void *p, size_t *n, size_t s);
151 void ovs_strlcpy(char *dst, const char *src, size_t size);
152 void ovs_strzcpy(char *dst, const char *src, size_t size);
154 void ovs_abort(int err_no, const char *format, ...)
155 PRINTF_FORMAT(2, 3) NO_RETURN;
156 void ovs_fatal(int err_no, const char *format, ...)
157 PRINTF_FORMAT(2, 3) NO_RETURN;
158 void ovs_error(int err_no, const char *format, ...) PRINTF_FORMAT(2, 3);
159 void ovs_error_valist(int err_no, const char *format, va_list)
161 const char *ovs_retval_to_string(int);
162 void ovs_hex_dump(FILE *, const void *, size_t, uintptr_t offset, bool ascii);
164 bool str_to_int(const char *, int base, int *);
165 bool str_to_long(const char *, int base, long *);
166 bool str_to_llong(const char *, int base, long long *);
167 bool str_to_uint(const char *, int base, unsigned int *);
168 bool str_to_ulong(const char *, int base, unsigned long *);
169 bool str_to_ullong(const char *, int base, unsigned long long *);
171 bool str_to_double(const char *, double *);
173 int hexit_value(int c);
174 unsigned int hexits_value(const char *s, size_t n, bool *ok);
177 char *dir_name(const char *file_name);
178 char *base_name(const char *file_name);
179 char *abs_file_name(const char *dir, const char *file_name);
181 void ignore(bool x OVS_UNUSED);