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util.c
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util.c
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/* XMRig
* Copyright 2010 Jeff Garzik <jgarzik@pobox.com>
* Copyright 2012-2014 pooler <pooler@litecoinpool.org>
* Copyright 2014 Lucas Jones <https://github.com/lucasjones>
* Copyright 2014-2016 Wolf9466 <https://github.com/OhGodAPet>
* Copyright 2016 Jay D Dee <jayddee246@gmail.com>
* Copyright 2016-2017 XMRig <support@xmrig.com>
*
*
* 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 <stdio.h>
#include <stdbool.h>
#include <stdlib.h>
#include <pthread.h>
#include "util.h"
#include "elist.h"
#include "utils/applog.h"
struct tq_ent {
void *data;
struct list_head q_node;
};
struct thread_q {
struct list_head q;
bool frozen;
pthread_mutex_t mutex;
pthread_cond_t cond;
};
json_t *json_decode(const char *s)
{
json_error_t err;
json_t *val = json_loads(s, 0, &err);
if (!val) {
applog(LOG_ERR, "JSON decode failed(%d): %s", err.line, err.text);
}
return val;
}
/**
* @brief bin2hex
* @param p
* @param len
* @return
*/
char *bin2hex(const unsigned char *p, size_t len)
{
char *s = malloc((len * 2) + 1);
if (!s) {
return NULL;
}
for (int i = 0; i < len; i++) {
sprintf(s + (i * 2), "%02x", (unsigned int) p[i]);
}
return s;
}
/**
* @brief hex2bin
* @param p
* @param hexstr
* @param len
* @return
*/
bool hex2bin(unsigned char *p, const char *hexstr, size_t len)
{
char hex_byte[3];
char *ep;
hex_byte[2] = '\0';
while (*hexstr && len) {
if (!hexstr[1]) {
applog(LOG_ERR, "hex2bin str truncated");
return false;
}
hex_byte[0] = hexstr[0];
hex_byte[1] = hexstr[1];
*p = (unsigned char) strtol(hex_byte, &ep, 16);
if (*ep) {
applog(LOG_ERR, "hex2bin failed on '%s'", hex_byte);
return false;
}
p++;
hexstr += 2;
len--;
}
return (len == 0 && *hexstr == 0) ? true : false;
}
/**
* @brief tq_new
* @return
*/
struct thread_q *tq_new(void)
{
struct thread_q *tq;
tq = calloc(1, sizeof(*tq));
if (!tq)
return NULL;
INIT_LIST_HEAD(&tq->q);
pthread_mutex_init(&tq->mutex, NULL);
pthread_cond_init(&tq->cond, NULL);
return tq;
}
/**
* @brief tq_free
* @param tq
*/
void tq_free(struct thread_q *tq)
{
struct tq_ent *ent, *iter;
if (!tq)
return;
list_for_each_entry_safe(ent, iter, &tq->q, q_node) {
list_del(&ent->q_node);
free(ent);
}
pthread_cond_destroy(&tq->cond);
pthread_mutex_destroy(&tq->mutex);
memset(tq, 0, sizeof(*tq)); /* poison */
free(tq);
}
/**
* @brief tq_freezethaw
* @param tq
* @param frozen
*/
static void tq_freezethaw(struct thread_q *tq, bool frozen)
{
pthread_mutex_lock(&tq->mutex);
tq->frozen = frozen;
pthread_cond_signal(&tq->cond);
pthread_mutex_unlock(&tq->mutex);
}
/**
* @brief tq_freeze
* @param tq
*/
void tq_freeze(struct thread_q *tq)
{
tq_freezethaw(tq, true);
}
/**
* @brief tq_thaw
* @param tq
*/
void tq_thaw(struct thread_q *tq)
{
tq_freezethaw(tq, false);
}
/**
* @brief tq_push
* @param tq
* @param data
* @return
*/
bool tq_push(struct thread_q *tq, void *data)
{
struct tq_ent *ent;
bool rc = true;
ent = calloc(1, sizeof(*ent));
if (!ent)
return false;
ent->data = data;
INIT_LIST_HEAD(&ent->q_node);
pthread_mutex_lock(&tq->mutex);
if (!tq->frozen) {
list_add_tail(&ent->q_node, &tq->q);
} else {
free(ent);
rc = false;
}
pthread_cond_signal(&tq->cond);
pthread_mutex_unlock(&tq->mutex);
return rc;
}
/**
* @brief tq_pop
* @param tq
* @param abstime
* @return
*/
void *tq_pop(struct thread_q *tq, const struct timespec *abstime)
{
struct tq_ent *ent;
void *rval = NULL;
int rc;
pthread_mutex_lock(&tq->mutex);
if (!list_empty(&tq->q))
goto pop;
if (abstime)
rc = pthread_cond_timedwait(&tq->cond, &tq->mutex, abstime);
else
rc = pthread_cond_wait(&tq->cond, &tq->mutex);
if (rc)
goto out;
if (list_empty(&tq->q))
goto out;
pop:
ent = list_entry(tq->q.next, struct tq_ent, q_node);
rval = ent->data;
list_del(&ent->q_node);
free(ent);
out:
pthread_mutex_unlock(&tq->mutex);
return rval;
}