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/*
* blogc: A blog compiler.
* Copyright (C) 2014-2019 Rafael G. Martins <rafael@rafaelmartins.eng.br>
*
* This program can be distributed under the terms of the BSD License.
* See the file LICENSE.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif /* HAVE_CONFIG_H */
#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#endif /* HAVE_SYS_TIME_H */
#ifdef HAVE_SYS_RESOURCE_H
#include <sys/resource.h>
#endif /* HAVE_SYS_RESOURCE_H */
#include "../common/utils.h"
#include "rusage.h"
// FIXME: optimize to use a single syscall for both cpu time and memory?
long long
blogc_rusage_get_cpu_time(void)
{
#ifndef HAVE_RUSAGE
return 0;
#else
struct rusage usage;
if (0 != getrusage(RUSAGE_SELF, &usage))
return 0;
return (
(usage.ru_utime.tv_sec * 1000000) + usage.ru_utime.tv_usec +
(usage.ru_stime.tv_sec * 1000000) + usage.ru_stime.tv_usec);
#endif
}
char*
blogc_rusage_format_cpu_time(long long time)
{
if (time > 1000000)
return bc_strdup_printf("%.3s", ((float) time) / 1000000.0);
// this is a special case: some systems may report the cpu time rounded up to the
// milisecond. it is useless to show ".000" in this case.
if (time > 1000)
return bc_strdup_printf("%.*fms", time % 1000 ? 3 : 0, ((float) time) / 1000.0);
return bc_strdup_printf("%dus", time);
}
char*
blogc_rusage_cpu_time(void)
{
return blogc_rusage_format_cpu_time(blogc_rusage_get_cpu_time());
}
long
blogc_rusage_get_memory(void)
{
#ifndef HAVE_RUSAGE
return 0;
#else
struct rusage usage;
if (0 != getrusage(RUSAGE_SELF, &usage))
return 0;
return usage.ru_maxrss;
#endif
}
char*
blogc_rusage_format_memory(long mem)
{
if (mem > 1048576)
return bc_strdup_printf("%.3fGB", ((float) mem) / 1048576.0);
if (mem > 1024)
return bc_strdup_printf("%.3fMB", ((float) mem) / 1024.0);
return bc_strdup_printf("%dKB", mem);
}
char*
blogc_rusage_memory(void)
{
return blogc_rusage_format_memory(blogc_rusage_get_memory());
}
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