85 lines
1.9 KiB
C
85 lines
1.9 KiB
C
/*
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* clock - determine the processor time used
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*/
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/* $Header$ */
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#include <time.h>
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#if defined(__BSD4_2)
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struct timeval {
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long tv_sec; /* seconds */
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long tv_usec; /* and microseconds */
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};
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#define RUSAGE_SELF 0
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#define RUSAGE_CHILDREN -1
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struct rusage {
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struct timeval ru_utime; /* user time used */
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struct timeval ru_stime; /* system time used */
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long ru_maxrss;
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long ru_ixrss; /* integral shared memory size */
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long ru_idrss; /* integral unshared data size */
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long ru_isrss; /* integral unshared stack size */
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long ru_minflt; /* page reclaims */
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long ru_majflt; /* page faults */
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long ru_nswap; /* swaps */
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long ru_inblock; /* block input operations */
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long ru_oublock; /* block output operations */
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long ru_msgsnd; /* messages sent */
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long ru_msgrcv; /* messages received */
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long ru_nsignals; /* signals received */
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long ru_nvcsw; /* voluntary context switches */
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long ru_nivcsw; /* involuntary context switches */
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};
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void _getrusage(int who, struct rusage *rusage);
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#elif defined(_POSIX_SOURCE) || defined(__USG)
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struct tms {
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time_t tms_utime; /* user time */
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time_t tms_stime; /* system time */
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time_t tms_cutime; /* user time, children */
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time_t tms_cstime; /* system time, children */
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};
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long _times(struct tms *buffer);
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#else /* Version 7 UNIX */
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struct tbuffer {
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long proc_user_time;
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long proc_system_time;
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long child_user_time;
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long child_system_time;
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};
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long _times(struct tbuffer *buffer);
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#endif
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clock_t
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clock(void)
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{
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#if defined(__BSD4_2)
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struct rusage rusage;
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_getrusage(RUSAGE_SELF, &rusage);
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return (((unsigned long)rusage.ru_utime.tv_sec * CLOCKS_PER_SEC)
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+ rusage.ru_utime.tv_usec);
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#elif defined(_POSIX_SOURCE) || defined(__USG)
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struct tms tms;
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_times(&tms);
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/* Assume that time_t can be converted to clock_t for Sys5 */
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return tms.tms_utime;
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#else
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struct tbuffer tbuffer;
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_times(&tbuffer);
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return tbuffer.proc_user_time;
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#endif
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}
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