libosip2/include/osip2/osip_time.h

/*
  The oSIP library implements the Session Initiation Protocol (SIP -rfc3261-)
  Copyright (C) 2001-2020 Aymeric MOIZARD amoizard@antisip.com

  This library is free software; you can redistribute it and/or
  modify it under the terms of the GNU Lesser General Public
  License as published by the Free Software Foundation; either
  version 2.1 of the License, or (at your option) any later version.

  This library is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  Lesser General Public License for more details.

  You should have received a copy of the GNU Lesser General Public
  License along with this library; if not, write to the Free Software
  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/

#ifndef _OSIP_TIME_H_
#define _OSIP_TIME_H_

#ifdef __cplusplus
extern "C" {
#endif

/* Common time-related functions and data types */

#if defined(_WIN32_WCE)
struct _timeb {
  time_t time;
  unsigned short millitm;
  short timezone;
  short dstflag;
};

#endif

/* struct timeval, as defined in <sys/time.h>, <winsock.h> or <winsock2.h> */
struct timeval;

/* Time manipulation functions */
void add_gettimeofday(struct timeval *atv, int ms);
void min_timercmp(struct timeval *tv1, struct timeval *tv2);

/* Operations on struct timeval */
#if !defined(timerisset)
#define osip_timerisset(tvp) ((tvp)->tv_sec || (tvp)->tv_usec)
#else
#define osip_timerisset(tvp) timerisset(tvp)
#endif

#if !defined(timercmp)
#define osip_timercmp(a, b, CMP) (((a)->tv_sec == (b)->tv_sec) ? ((a)->tv_usec CMP(b)->tv_usec) : ((a)->tv_sec CMP(b)->tv_sec))
#else
#define osip_timercmp(tvp, uvp, cmp) timercmp(tvp, uvp, cmp)
#endif

#if !defined(timerclear)
#define osip_timerclear(tvp) (tvp)->tv_sec = (tvp)->tv_usec = 0
#else
#define osip_timerclear(tvp) timerclear(tvp)
#endif

#if !defined(timersub)
#define osip_timersub(a, b, result)                  \
  do {                                               \
    (result)->tv_sec = (a)->tv_sec - (b)->tv_sec;    \
    (result)->tv_usec = (a)->tv_usec - (b)->tv_usec; \
    if ((result)->tv_usec < 0) {                     \
      --(result)->tv_sec;                            \
      (result)->tv_usec += 1000000;                  \
    }                                                \
  } while (0)
#else
#define osip_timersub(a, b, result) timersub(a, b, result)
#endif

int osip_gettimeofday(struct timeval *tp, void *tz);
time_t osip_getsystemtime(time_t *t);
void osip_compensatetime(void);

#ifdef __cplusplus
}
#endif
#endif