40 lines
625 B
C
40 lines
625 B
C
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#include <stdio.h>
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#include <sys/time.h>
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#include <sys/types.h>
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#include <minix/u64.h>
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#include <minix/config.h>
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#include <minix/const.h>
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#include "sysutil.h"
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static u32_t Hz;
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u32_t
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sys_hz(void)
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{
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if(Hz <= 0) {
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int r;
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/* Get HZ. */
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if((r=sys_getinfo(GET_HZ, &Hz, sizeof(Hz), 0, 0)) != OK) {
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Hz = DEFAULT_HZ;
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printf("sys_hz: can not get HZ: error %d.\nUsing default HZ = %u\n",
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r, (unsigned int) Hz);
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}
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}
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return Hz;
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}
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u32_t
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micros_to_ticks(u32_t micros)
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{
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u32_t ticks;
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ticks = div64u(mul64u(micros, sys_hz()), 1000000);
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if(ticks < 1) ticks = 1;
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return ticks;
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}
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