Mercurial > MadButterfly
view src/timertool.c @ 653:34710e86b4a2
Remove cairo-directfb.h but it will be needed at graphic layer initialization of SMP8654.
author | Shih-Yuan Lee (FourDollars) <fourdollars@gmail.com> |
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date | Sat, 31 Jul 2010 16:36:53 +0800 |
parents | 530bb7728546 |
children | 586e50f82c1f |
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#include <stdio.h> #include <sys/time.h> #ifdef __FreeBSD__ #include <machine/cpufunc.h> #include <sys/types.h> #include <sys/sysctl.h> #endif #include "mb_timer.h" #ifdef __FreeBSD__ void get_now(mb_timeval_t *tmo) { struct timeval tv; static uint64_t cpufreq; static uint64_t diff; static mb_timeval_t tm = {0, 0}; static uint64_t last_ts; mb_timeval_t diff_tm; uint64_t ts, udiff, sdiff; size_t sysctl_sz; int r; if(MB_TIMEVAL_SEC(&tm) == 0) { sysctl_sz = sizeof(uint64_t); r = sysctlbyname("kern.timecounter.tc.TSC.frequency", &cpufreq, &sysctl_sz, NULL, 0); if(r == -1) { perror("sysctl"); return; } gettimeofday(&tv, NULL); last_ts = rdtsc(); MB_TIMEVAL_SET(tmo, tv.tv_sec, tv.tv_usec); MB_TIMEVAL_CP(&tm, tmo); diff = 0; } else { ts = rdtsc(); diff += ts - last_ts; sdiff = diff / cpufreq; udiff = (diff % cpufreq) * 1000000 / cpufreq; MB_TIMEVAL_SET(&diff_tm, sdiff, udiff); MB_TIMEVAL_CP(tmo, &tm); MB_TIMEVAL_ADD(tmo, &diff_tm); MB_TIMEVAL_SET(&diff_tm, sdiff, 0); MB_TIMEVAL_ADD(&tm, &diff_tm); diff %= cpufreq; last_ts = ts; } } #else /* __FreeBSD__ */ void get_now(mb_timeval_t *tmo) { struct timeval tv; gettimeofday(&tv, NULL); MB_TIMEVAL_SET(tmo, tv.tv_sec, tv.tv_usec); } #endif /* __FreeBSD__ */