2 * Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014 Nicira, Inc.
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.
17 #ifndef OPENVSWITCH_UTIL_H
18 #define OPENVSWITCH_UTIL_H 1
20 #include <openvswitch/version.h>
26 void ovs_set_program_name__(const char *name, const char *version,
27 const char *date, const char *time);
29 #define ovs_set_program_name(name, version) \
30 ovs_set_program_name__(name, version, __DATE__, __TIME__)
32 const char *ovs_get_program_name(void);
33 const char *ovs_get_program_version(void);
35 /* Expands to a string that looks like "<file>:<line>", e.g. "tmp.c:10".
37 * See http://c-faq.com/ansi/stringize.html for an explanation of OVS_STRINGIZE
38 * and OVS_STRINGIZE2. */
39 #define OVS_SOURCE_LOCATOR __FILE__ ":" OVS_STRINGIZE(__LINE__)
40 #define OVS_STRINGIZE(ARG) OVS_STRINGIZE2(ARG)
41 #define OVS_STRINGIZE2(ARG) #ARG
43 /* Saturating multiplication of "unsigned int"s: overflow yields UINT_MAX. */
44 #define OVS_SAT_MUL(X, Y) \
46 : (X) <= UINT_MAX / (Y) ? (unsigned int) (X) * (unsigned int) (Y) \