external/bsd/libevent/dist/evutil.h

   1 /*      $NetBSD$        */
   2 /*
   3  * Copyright (c) 2007 Niels Provos <provos@citi.umich.edu>
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  * 3. The name of the author may not be used to endorse or promote products
  15  *    derived from this software without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  */
  28 #ifndef _EVUTIL_H_
  29 #define _EVUTIL_H_
  30
  31 /** @file evutil.h
  32
  33   Common convenience functions for cross-platform portability and
  34   related socket manipulations.
  35
  36  */
  37
  38 #ifdef __cplusplus
  39 extern "C" {
  40 #endif
  41
  42 #include <event-config.h>
  43 #ifdef _EVENT_HAVE_SYS_TIME_H
  44 #include <sys/time.h>
  45 #endif
  46 #ifdef _EVENT_HAVE_STDINT_H
  47 #include <stdint.h>
  48 #elif defined(_EVENT_HAVE_INTTYPES_H)
  49 #include <inttypes.h>
  50 #endif
  51 #ifdef _EVENT_HAVE_SYS_TYPES_H
  52 #include <sys/types.h>
  53 #endif
  54 #include <stdarg.h>
  55
  56 #ifdef _EVENT_HAVE_UINT64_T
  57 #define ev_uint64_t uint64_t
  58 #define ev_int64_t int64_t
  59 #elif defined(WIN32)
  60 #define ev_uint64_t unsigned __int64
  61 #define ev_int64_t signed __int64
  62 #elif _EVENT_SIZEOF_LONG_LONG == 8
  63 #define ev_uint64_t unsigned long long
  64 #define ev_int64_t long long
  65 #elif _EVENT_SIZEOF_LONG == 8
  66 #define ev_uint64_t unsigned long
  67 #define ev_int64_t long
  68 #else
  69 #error "No way to define ev_uint64_t"
  70 #endif
  71
  72 #ifdef _EVENT_HAVE_UINT32_T
  73 #define ev_uint32_t uint32_t
  74 #elif defined(WIN32)
  75 #define ev_uint32_t unsigned int
  76 #elif _EVENT_SIZEOF_LONG == 4
  77 #define ev_uint32_t unsigned long
  78 #elif _EVENT_SIZEOF_INT == 4
  79 #define ev_uint32_t unsigned int
  80 #else
  81 #error "No way to define ev_uint32_t"
  82 #endif
  83
  84 #ifdef _EVENT_HAVE_UINT16_T
  85 #define ev_uint16_t uint16_t
  86 #elif defined(WIN32)
  87 #define ev_uint16_t unsigned short
  88 #elif _EVENT_SIZEOF_INT == 2
  89 #define ev_uint16_t unsigned int
  90 #elif _EVENT_SIZEOF_SHORT == 2
  91 #define ev_uint16_t unsigned short
  92 #else
  93 #error "No way to define ev_uint16_t"
  94 #endif
  95
  96 #ifdef _EVENT_HAVE_UINT8_T
  97 #define ev_uint8_t uint8_t
  98 #else
  99 #define ev_uint8_t unsigned char
 100 #endif
 101
 102 int evutil_socketpair(int d, int type, int protocol, int sv[2]);
 103 int evutil_make_socket_nonblocking(int sock);
 104 #ifdef WIN32
 105 #define EVUTIL_CLOSESOCKET(s) closesocket(s)
 106 #else
 107 #define EVUTIL_CLOSESOCKET(s) close(s)
 108 #endif
 109
 110 #ifdef WIN32
 111 #define EVUTIL_SOCKET_ERROR() WSAGetLastError()
 112 #define EVUTIL_SET_SOCKET_ERROR(errcode)                \
 113         do { WSASetLastError(errcode); } while (0)
 114 #else
 115 #define EVUTIL_SOCKET_ERROR() (errno)
 116 #define EVUTIL_SET_SOCKET_ERROR(errcode)                \
 117                 do { errno = (errcode); } while (0)
 118 #endif
 119
 120 /*
 121  * Manipulation functions for struct timeval
 122  */
 123 #ifdef _EVENT_HAVE_TIMERADD
 124 #define evutil_timeradd(tvp, uvp, vvp) timeradd((tvp), (uvp), (vvp))
 125 #define evutil_timersub(tvp, uvp, vvp) timersub((tvp), (uvp), (vvp))
 126 #else
 127 #define evutil_timeradd(tvp, uvp, vvp)                                                  \
 128         do {                                                                                                            \
 129                 (vvp)->tv_sec = (tvp)->tv_sec + (uvp)->tv_sec;                  \
 130                 (vvp)->tv_usec = (tvp)->tv_usec + (uvp)->tv_usec;       \
 131                 if ((vvp)->tv_usec >= 1000000) {                                                \
 132                         (vvp)->tv_sec++;                                                                        \
 133                         (vvp)->tv_usec -= 1000000;                                                      \
 134                 }                                                                                                               \
 135         } while (0)
 136 #define evutil_timersub(tvp, uvp, vvp)                                          \
 137         do {                                                                                                    \
 138                 (vvp)->tv_sec = (tvp)->tv_sec - (uvp)->tv_sec;          \
 139                 (vvp)->tv_usec = (tvp)->tv_usec - (uvp)->tv_usec;       \
 140                 if ((vvp)->tv_usec < 0) {                                                       \
 141                         (vvp)->tv_sec--;                                                                \
 142                         (vvp)->tv_usec += 1000000;                                              \
 143                 }                                                                                                       \
 144         } while (0)
 145 #endif /* !_EVENT_HAVE_HAVE_TIMERADD */
 146
 147 #ifdef _EVENT_HAVE_TIMERCLEAR
 148 #define evutil_timerclear(tvp) timerclear(tvp)
 149 #else
 150 #define evutil_timerclear(tvp)  (tvp)->tv_sec = (tvp)->tv_usec = 0
 151 #endif
 152
 153 #define evutil_timercmp(tvp, uvp, cmp)                                                  \
 154         (((tvp)->tv_sec == (uvp)->tv_sec) ?                                                     \
 155          ((tvp)->tv_usec cmp (uvp)->tv_usec) :                                          \
 156          ((tvp)->tv_sec cmp (uvp)->tv_sec))
 157
 158 #ifdef _EVENT_HAVE_TIMERISSET
 159 #define evutil_timerisset(tvp) timerisset(tvp)
 160 #else
 161 #define evutil_timerisset(tvp)  ((tvp)->tv_sec || (tvp)->tv_usec)
 162 #endif
 163
 164
 165 /* big-int related functions */
 166 ev_int64_t evutil_strtoll(const char *s, char **endptr, int base);
 167
 168
 169 #ifdef _EVENT_HAVE_GETTIMEOFDAY
 170 #define evutil_gettimeofday(tv, tz) gettimeofday((tv), (tz))
 171 #else
 172 int evutil_gettimeofday(struct timeval *tv, struct timezone *tz);
 173 #endif
 174
 175 int evutil_snprintf(char *buf, size_t buflen, const char *format, ...)
 176 #ifdef __GNUC__
 177         __attribute__((format(printf, 3, 4)))
 178 #endif
 179         ;
 180 int evutil_vsnprintf(char *buf, size_t buflen, const char *format, va_list ap);
 181
 182 #ifdef __cplusplus
 183 }
 184 #endif
 185
 186 #endif /* _EVUTIL_H_ */