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/*
* Copyright (c) 2014 Richard Braun.
*
* This program 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 of the License, or
* (at your option) any later version.
*
* This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <string.h>
#include <kern/evcnt.h>
#include <kern/init.h>
#include <kern/list.h>
#include <kern/mutex.h>
#include <kern/printk.h>
/*
* Global list of all registered counters.
*/
static struct list evcnt_list;
static struct mutex evcnt_mutex;
void __init
evcnt_setup(void)
{
list_init(&evcnt_list);
mutex_init(&evcnt_mutex);
}
void
evcnt_register(struct evcnt *evcnt, const char *name)
{
evcnt->count = 0;
strlcpy(evcnt->name, name, sizeof(evcnt->name));
mutex_lock(&evcnt_mutex);
list_insert_tail(&evcnt_list, &evcnt->node);
mutex_unlock(&evcnt_mutex);
}
void
evcnt_info(const char *pattern)
{
struct evcnt *evcnt;
size_t length, pattern_length;
pattern_length = (pattern == NULL) ? 0 : strlen(pattern);
printk("evcnt: name count\n");
mutex_lock(&evcnt_mutex);
list_for_each_entry(&evcnt_list, evcnt, node) {
if (pattern_length != 0) {
length = strlen(evcnt->name);
if ((length < pattern_length)
|| (memcmp(evcnt->name, pattern, pattern_length) != 0)) {
continue;
}
}
printk("evcnt: %-30s %17llu\n", evcnt->name, evcnt->count);
}
mutex_unlock(&evcnt_mutex);
}
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