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Annotation of 42BSD/sys/h/time.h, revision 1.1.1.1

1.1       root        1: /*     time.h  6.1     83/07/29        */
                      2: 
                      3: /*
                      4:  * Structure returned by gettimeofday(2) system call,
                      5:  * and used in other calls.
                      6:  */
                      7: struct timeval {
                      8:        long    tv_sec;         /* seconds */
                      9:        long    tv_usec;        /* and microseconds */
                     10: };
                     11: 
                     12: struct timezone {
                     13:        int     tz_minuteswest; /* minutes west of Greenwich */
                     14:        int     tz_dsttime;     /* type of dst correction */
                     15: };
                     16: #define        DST_NONE        0       /* not on dst */
                     17: #define        DST_USA         1       /* USA style dst */
                     18: #define        DST_AUST        2       /* Australian style dst */
                     19: #define        DST_WET         3       /* Western European dst */
                     20: #define        DST_MET         4       /* Middle European dst */
                     21: #define        DST_EET         5       /* Eastern European dst */
                     22: 
                     23: /*
                     24:  * Operations on timevals.
                     25:  *
                     26:  * NB: timercmp does not work for >= or <=.
                     27:  */
                     28: #define        timerisset(tvp)         ((tvp)->tv_sec || (tvp)->tv_usec)
                     29: #define        timercmp(tvp, uvp, cmp) \
                     30:        ((tvp)->tv_sec cmp (uvp)->tv_sec || \
                     31:         (tvp)->tv_sec == (uvp)->tv_sec && (tvp)->tv_usec cmp (uvp)->tv_usec)
                     32: #define        timerclear(tvp)         (tvp)->tv_sec = (tvp)->tv_usec = 0
                     33: 
                     34: /*
                     35:  * Names of the interval timers, and structure
                     36:  * defining a timer setting.
                     37:  */
                     38: #define        ITIMER_REAL     0
                     39: #define        ITIMER_VIRTUAL  1
                     40: #define        ITIMER_PROF     2
                     41: 
                     42: struct itimerval {
                     43:        struct  timeval it_interval;    /* timer interval */
                     44:        struct  timeval it_value;       /* current value */
                     45: };
                     46: 
                     47: /*
                     48:  * Structure returned by gmtime and localtime calls (see ctime(3)).
                     49:  */
                     50: struct tm {
                     51:        int     tm_sec;
                     52:        int     tm_min;
                     53:        int     tm_hour;
                     54:        int     tm_mday;
                     55:        int     tm_mon;
                     56:        int     tm_year;
                     57:        int     tm_wday;
                     58:        int     tm_yday;
                     59:        int     tm_isdst;
                     60: };
                     61: 
                     62: #ifndef KERNEL
                     63: extern struct tm *gmtime(), *localtime();
                     64: extern char *asctime(), *ctime();
                     65: #endif

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