95 lines
2.0 KiB
C
95 lines
2.0 KiB
C
#include "lnag-utils.h"
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#include "nsutils.h"
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#include <sys/types.h>
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#include <stdarg.h>
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#include <stdio.h>
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#if defined(hpux) || defined(__hpux) || defined(_hpux)
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# include <sys/pstat.h>
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#endif
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/*
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* By doing this in two steps we can at least get
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* the function to be somewhat coherent, even
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* with this disgusting nest of #ifdefs.
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*/
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#ifndef _SC_NPROCESSORS_ONLN
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# ifdef _SC_NPROC_ONLN
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# define _SC_NPROCESSORS_ONLN _SC_NPROC_ONLN
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# elif defined _SC_CRAY_NCPU
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# define _SC_NPROCESSORS_ONLN _SC_CRAY_NCPU
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# endif
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#endif
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int real_online_cpus(void)
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{
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#ifdef _SC_NPROCESSORS_ONLN
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long ncpus;
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if ((ncpus = (long)sysconf(_SC_NPROCESSORS_ONLN)) > 0)
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return (int)ncpus;
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#elif defined(hpux) || defined(__hpux) || defined(_hpux)
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struct pst_dynamic psd;
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if (!pstat_getdynamic(&psd, sizeof(psd), (size_t)1, 0))
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return (int)psd.psd_proc_cnt;
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#endif
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return 0;
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}
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int online_cpus(void)
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{
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int ncpus = real_online_cpus();
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return ncpus > 0 ? ncpus : 1;
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}
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int tv_delta_msec(const struct timeval *start, const struct timeval *stop)
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{
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int msecs;
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unsigned long usecs = 0;
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msecs = (stop->tv_sec - start->tv_sec) * 1000;
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if (stop->tv_usec < start->tv_usec) {
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msecs -= 1000;
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usecs += 1000000;
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}
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usecs += stop->tv_usec - start->tv_usec;
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msecs += (usecs / 1000);
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return msecs;
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}
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float tv_delta_f(const struct timeval *start, const struct timeval *stop)
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{
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#define DIVIDER 1000000
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float ret;
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time_t usecs, stop_usec;
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ret = stop->tv_sec - start->tv_sec;
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stop_usec = stop->tv_usec;
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if (stop_usec < start->tv_usec) {
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ret -= 1.0;
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stop_usec += DIVIDER;
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}
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usecs = stop_usec - start->tv_usec;
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ret += (float)((float)usecs / DIVIDER);
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return ret;
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}
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#define MKSTR_BUFS 256 /* should be plenty */
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const char *mkstr(const char *fmt, ...)
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{
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static char buf[MKSTR_BUFS][32]; /* 8k statically on the stack */
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static int slot = 0;
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char *ret;
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va_list ap;
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va_start(ap, fmt);
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ret = buf[slot++ % MKSTR_BUFS];
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vsnprintf(ret, sizeof(buf[0]), fmt, ap);
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va_end(ap);
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return ret;
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}
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