Annotation of embedaddon/libevent/evutil.h, revision 1.1
1.1 ! misho 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_ */
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