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/* This file is part of GNU Dico
Copyright (C) 2008-2019 Sergey Poznyakoff
GNU Dico is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
GNU Dico is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNU Dico. If not, see <http://www.gnu.org/licenses/>. */
#include <config.h>
#include <xdico.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <unistd.h>
#include <string.h>
#include <hash.h>
#include <ctype.h>
#include <xalloc.h>
struct timer_slot {
char *name;
double real;
double self_user; /* user time in sec */
double self_system; /* system time in sec */
double children_user; /* user time in sec */
double children_system; /* system time in sec */
struct timeval real_mark;
struct rusage self_mark;
struct rusage children_mark;
};
static Hash_table *timer_table;
static size_t
hash_string_ci (const char *string, size_t n_buckets)
{
size_t value = 0;
unsigned char ch;
for (; (ch = *string); string++)
value = (value * 31 + tolower(ch)) % n_buckets;
return value;
}
/* Calculate the hash of a string. */
static size_t
timer_hasher(void const *data, size_t n_buckets)
{
const struct timer_slot *t = data;
return hash_string_ci(t->name, n_buckets);
}
/* Compare two strings for equality. */
static bool
timer_compare(void const *data1, void const *data2)
{
const struct timer_slot *t1 = data1;
const struct timer_slot *t2 = data2;
return strcasecmp(t1->name, t2->name) == 0;
}
/* Allocate a timer structure */
static xdico_timer_t
timer_alloc(const char *name)
{
xdico_timer_t t = xmalloc(sizeof(*t) + strlen(name) + 1);
memset(t, 0, sizeof(*t));
t->name = (char*)(t + 1);
strcpy(t->name, name);
return t;
}
/* Lookup a timer by its name. If it does not exist, create it. */
xdico_timer_t
timer_get(const char *name)
{
xdico_timer_t tp, ret;
tp = timer_alloc(name);
if (! ((timer_table
|| (timer_table = hash_initialize(0, 0,
timer_hasher,
timer_compare, 0)))
&& (ret = hash_insert(timer_table, tp))))
xalloc_die ();
if (ret != tp)
free(tp);
return ret;
}
xdico_timer_t
timer_start(const char *name)
{
xdico_timer_t t = timer_get(name);
gettimeofday(&t->real_mark, NULL);
getrusage(RUSAGE_SELF, &t->self_mark);
getrusage(RUSAGE_CHILDREN, &t->children_mark);
return t;
}
#define DIFFTIME(now,then)\
(((now).tv_sec - (then).tv_sec) \
+ ((double)((now).tv_usec - (then).tv_usec))/1000000)
static void
_timer_compute(xdico_timer_t t)
{
struct timeval real;
struct rusage rusage;
gettimeofday(&real, NULL);
t->real = DIFFTIME(real, t->real_mark);
getrusage(RUSAGE_SELF, &rusage);
t->self_user = DIFFTIME(rusage.ru_utime, t->self_mark.ru_utime);
t->self_system = DIFFTIME(rusage.ru_stime, t->self_mark.ru_stime);
getrusage(RUSAGE_CHILDREN, &rusage);
t->children_user = DIFFTIME(rusage.ru_utime, t->children_mark.ru_utime);
t->children_system = DIFFTIME(rusage.ru_stime, t->children_mark.ru_stime);
}
xdico_timer_t
timer_stop(const char *name)
{
xdico_timer_t t = timer_get(name);
_timer_compute(t);
return t;
}
xdico_timer_t
timer_reset(const char *name)
{
xdico_timer_t t = timer_get(name);
t->real = 0.0;
t->self_user = 0.0;
t->self_system = 0.0;
t->children_user = 0.0;
t->children_system = 0.0;
return t;
}
double
timer_get_real(xdico_timer_t t)
{
return t->real;
}
double
timer_get_user(xdico_timer_t t)
{
return t->self_user + t->children_user;
}
double
timer_get_system(xdico_timer_t t)
{
return t->self_system + t->children_system;
}
void
timer_format_time(dico_stream_t stream, double t)
{
static char buf[128];
if (t < 600)
snprintf(buf, sizeof(buf), "%0.3f", t );
else {
long int s, m, h, d;
s = (long int)t;
d = s / (3600*24);
s -= d * 3600 * 24;
h = s / 3600;
s -= h * 3600;
m = s / 60;
s -= m * 60;
if (d)
snprintf(buf, sizeof(buf), "%ld+%02ld:%02ld:%02ld", d, h, m, s);
else if (h)
snprintf(buf, sizeof(buf), "%02ld:%02ld:%02ld", h, m, s);
else
snprintf(buf, sizeof(buf), "%02ld:%02ld", m, s);
}
dico_stream_write(stream, buf, strlen(buf));
}
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