third_party/libevent/evutil.h

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