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/*
* Copyright 2010 Jeff Garzik
*
* 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 2 of the License, or (at your option)
* any later version. See COPYING for more details.
*/
#include "cpuminer-config.h"
#define _GNU_SOURCE
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdbool.h>
#include <stdint.h>
#include <unistd.h>
#include <sys/time.h>
#include <time.h>
#ifndef WIN32
#include <sys/resource.h>
#endif
#include <getopt.h>
#include <jansson.h>
#include <curl/curl.h>
#include "compat.h"
#include "miner.h"
#define PROGRAM_NAME "minerd"
#define DEF_RPC_URL "http://127.0.0.1:8332/"
#define DEF_RPC_USERNAME "rpcuser"
#define DEF_RPC_PASSWORD "rpcpass"
#define DEF_RPC_USERPASS DEF_RPC_USERNAME ":" DEF_RPC_PASSWORD
#ifdef __linux /* Linux specific policy and affinity management */
#include <sched.h>
static inline void drop_policy(void)
{
struct sched_param param;
#ifdef SCHED_IDLE
if (unlikely(sched_setscheduler(0, SCHED_IDLE, &param) == -1))
#endif
#ifdef SCHED_BATCH
sched_setscheduler(0, SCHED_BATCH, &param);
#endif
}
static inline void affine_to_cpu(int id, int cpu)
{
cpu_set_t set;
CPU_ZERO(&set);
CPU_SET(cpu, &set);
sched_setaffinity(0, sizeof(&set), &set);
applog(LOG_INFO, "Binding thread %d to cpu %d", id, cpu);
}
#else
static inline void drop_policy(void)
{
}
static inline void affine_to_cpu(int id, int cpu)
{
}
#endif
enum workio_commands {
WC_GET_WORK,
WC_SUBMIT_WORK,
};
struct workio_cmd {
enum workio_commands cmd;
struct thr_info *thr;
union {
struct work *work;
} u;
};
enum sha256_algos {
ALGO_C, /* plain C */
ALGO_4WAY, /* parallel SSE2 */
ALGO_VIA, /* VIA padlock */
ALGO_CRYPTOPP, /* Crypto++ (C) */
ALGO_CRYPTOPP_ASM32, /* Crypto++ 32-bit assembly */
ALGO_SSE2_64, /* SSE2 for x86_64 */
ALGO_SCRYPT, /* scrypt(1024,1,1) */
};
static const char *algo_names[] = {
[ALGO_C] = "c",
#ifdef WANT_SSE2_4WAY
[ALGO_4WAY] = "4way",
#endif
#ifdef WANT_VIA_PADLOCK
[ALGO_VIA] = "via",
#endif
[ALGO_CRYPTOPP] = "cryptopp",
#ifdef WANT_CRYPTOPP_ASM32
[ALGO_CRYPTOPP_ASM32] = "cryptopp_asm32",
#endif
#ifdef WANT_X8664_SSE2
[ALGO_SSE2_64] = "sse2_64",
#endif
[ALGO_SCRYPT] = "scrypt",
};
bool opt_debug = false;
bool opt_protocol = false;
bool want_longpoll = true;
bool have_longpoll = false;
bool use_syslog = false;
static bool opt_quiet = false;
static int opt_retries = 10;
static int opt_fail_pause = 30;
int opt_scantime = 5;
static json_t *opt_config;
static const bool opt_time = true;
#ifdef WANT_X8664_SSE2
static enum sha256_algos opt_algo = ALGO_SCRYPT;
#else
static enum sha256_algos opt_algo = ALGO_SCRYPT;
#endif
static int opt_n_threads;
static int num_processors;
static char *rpc_url;
static char *rpc_userpass;
static char *rpc_user, *rpc_pass;
struct thr_info *thr_info;
static int work_thr_id;
int longpoll_thr_id;
struct work_restart *work_restart = NULL;
pthread_mutex_t time_lock;
struct option_help {
const char *name;
const char *helptext;
};
static struct option_help options_help[] = {
{ "help",
"(-h) Display this help text" },
{ "config FILE",
"(-c FILE) JSON-format configuration file (default: none)\n"
"See example-cfg.json for an example configuration." },
{ "algo XXX",
"(-a XXX) USE *ONLY* scrypt (e.g. --algo scrypt) WITH TENEBRIX\n"
"\tscrypt is the default now" },
{ "quiet",
"(-q) Disable per-thread hashmeter output (default: off)" },
{ "debug",
"(-D) Enable debug output (default: off)" },
{ "no-longpoll",
"Disable X-Long-Polling support (default: enabled)" },
{ "protocol-dump",
"(-P) Verbose dump of protocol-level activities (default: off)" },
{ "retries N",
"(-r N) Number of times to retry, if JSON-RPC call fails\n"
"\t(default: 10; use -1 for \"never\")" },
{ "retry-pause N",
"(-R N) Number of seconds to pause, between retries\n"
"\t(default: 30)" },
{ "scantime N",
"(-s N) Upper bound on time spent scanning current work,\n"
"\tin seconds. (default: 5)" },
#ifdef HAVE_SYSLOG_H
{ "syslog",
"Use system log for output messages (default: standard error)" },
#endif
{ "threads N",
"(-t N) Number of miner threads (default: 1)" },
{ "url URL",
"URL for bitcoin JSON-RPC server "
"(default: " DEF_RPC_URL ")" },
{ "userpass USERNAME:PASSWORD",
"Username:Password pair for bitcoin JSON-RPC server "
"(default: " DEF_RPC_USERPASS ")" },
{ "user USERNAME",
"(-u USERNAME) Username for bitcoin JSON-RPC server "
"(default: " DEF_RPC_USERNAME ")" },
{ "pass PASSWORD",
"(-p PASSWORD) Password for bitcoin JSON-RPC server "
"(default: " DEF_RPC_PASSWORD ")" },
};
static struct option options[] = {
{ "algo", 1, NULL, 'a' },
{ "config", 1, NULL, 'c' },
{ "debug", 0, NULL, 'D' },
{ "help", 0, NULL, 'h' },
{ "no-longpoll", 0, NULL, 1003 },
{ "pass", 1, NULL, 'p' },
{ "protocol-dump", 0, NULL, 'P' },
{ "quiet", 0, NULL, 'q' },
{ "threads", 1, NULL, 't' },
{ "retries", 1, NULL, 'r' },
{ "retry-pause", 1, NULL, 'R' },
{ "scantime", 1, NULL, 's' },
#ifdef HAVE_SYSLOG_H
{ "syslog", 0, NULL, 1004 },
#endif
{ "url", 1, NULL, 1001 },
{ "user", 1, NULL, 'u' },
{ "userpass", 1, NULL, 1002 },
{ }
};
struct work {
unsigned char data[128];
unsigned char hash1[64];
unsigned char midstate[32];
unsigned char target[32];
unsigned char hash[32];
};
static bool jobj_binary(const json_t *obj, const char *key,
void *buf, size_t buflen)
{
const char *hexstr;
json_t *tmp;
tmp = json_object_get(obj, key);
if (unlikely(!tmp)) {
applog(LOG_ERR, "JSON key '%s' not found", key);
return false;
}
hexstr = json_string_value(tmp);
if (unlikely(!hexstr)) {
applog(LOG_ERR, "JSON key '%s' is not a string", key);
return false;
}
if (!hex2bin(buf, hexstr, buflen))
return false;
return true;
}
static bool work_decode(const json_t *val, struct work *work)
{
if (unlikely(!jobj_binary(val, "midstate",
work->midstate, sizeof(work->midstate)))) {
applog(LOG_ERR, "JSON inval midstate");
goto err_out;
}
if (unlikely(!jobj_binary(val, "data", work->data, sizeof(work->data)))) {
applog(LOG_ERR, "JSON inval data");
goto err_out;
}
if (unlikely(!jobj_binary(val, "hash1", work->hash1, sizeof(work->hash1)))) {
applog(LOG_ERR, "JSON inval hash1");
goto err_out;
}
if (unlikely(!jobj_binary(val, "target", work->target, sizeof(work->target)))) {
applog(LOG_ERR, "JSON inval target");
goto err_out;
}
memset(work->hash, 0, sizeof(work->hash));
return true;
err_out:
return false;
}
static bool submit_upstream_work(CURL *curl, const struct work *work)
{
char *hexstr = NULL;
json_t *val, *res;
char s[345];
bool rc = false;
/* build hex string */
hexstr = bin2hex(work->data, sizeof(work->data));
if (unlikely(!hexstr)) {
applog(LOG_ERR, "submit_upstream_work OOM");
goto out;
}
/* build JSON-RPC request */
sprintf(s,
"{\"method\": \"getwork\", \"params\": [ \"%s\" ], \"id\":1}\r\n",
hexstr);
if (opt_debug)
applog(LOG_DEBUG, "DBG: sending RPC call: %s", s);
/* issue JSON-RPC request */
val = json_rpc_call(curl, rpc_url, rpc_userpass, s, false, false);
if (unlikely(!val)) {
applog(LOG_ERR, "submit_upstream_work json_rpc_call failed");
goto out;
}
res = json_object_get(val, "result");
applog(LOG_INFO, "PROOF OF WORK RESULT: %s",
json_is_true(res) ? "true (yay!!!)" : "false (booooo)");
json_decref(val);
rc = true;
out:
free(hexstr);
return rc;
}
static const char *rpc_req =
"{\"method\": \"getwork\", \"params\": [], \"id\":0}\r\n";
static bool get_upstream_work(CURL *curl, struct work *work)
{
json_t *val;
bool rc;
val = json_rpc_call(curl, rpc_url, rpc_userpass, rpc_req,
want_longpoll, false);
if (!val)
return false;
rc = work_decode(json_object_get(val, "result"), work);
json_decref(val);
return rc;
}
static void workio_cmd_free(struct workio_cmd *wc)
{
if (!wc)
return;
switch (wc->cmd) {
case WC_SUBMIT_WORK:
free(wc->u.work);
break;
default: /* do nothing */
break;
}
memset(wc, 0, sizeof(*wc)); /* poison */
free(wc);
}
static bool workio_get_work(struct workio_cmd *wc, CURL *curl)
{
struct work *ret_work;
int failures = 0;
ret_work = calloc(1, sizeof(*ret_work));
if (!ret_work)
return false;
/* obtain new work from bitcoin via JSON-RPC */
while (!get_upstream_work(curl, ret_work)) {
if (unlikely((opt_retries >= 0) && (++failures > opt_retries))) {
applog(LOG_ERR, "json_rpc_call failed, terminating workio thread");
free(ret_work);
return false;
}
/* pause, then restart work-request loop */
applog(LOG_ERR, "json_rpc_call failed, retry after %d seconds",
opt_fail_pause);
sleep(opt_fail_pause);
}
/* send work to requesting thread */
if (!tq_push(wc->thr->q, ret_work))
free(ret_work);
return true;
}
static bool workio_submit_work(struct workio_cmd *wc, CURL *curl)
{
int failures = 0;
/* submit solution to bitcoin via JSON-RPC */
while (!submit_upstream_work(curl, wc->u.work)) {
if (unlikely((opt_retries >= 0) && (++failures > opt_retries))) {
applog(LOG_ERR, "...terminating workio thread");
return false;
}
/* pause, then restart work-request loop */
applog(LOG_ERR, "...retry after %d seconds",
opt_fail_pause);
sleep(opt_fail_pause);
}
return true;
}
static void *workio_thread(void *userdata)
{
struct thr_info *mythr = userdata;
CURL *curl;
bool ok = true;
curl = curl_easy_init();
if (unlikely(!curl)) {
applog(LOG_ERR, "CURL initialization failed");
return NULL;
}
while (ok) {
struct workio_cmd *wc;
/* wait for workio_cmd sent to us, on our queue */
wc = tq_pop(mythr->q, NULL);
if (!wc) {
ok = false;
break;
}
/* process workio_cmd */
switch (wc->cmd) {
case WC_GET_WORK:
ok = workio_get_work(wc, curl);
break;
case WC_SUBMIT_WORK:
ok = workio_submit_work(wc, curl);
break;
default: /* should never happen */
ok = false;
break;
}
workio_cmd_free(wc);
}
tq_freeze(mythr->q);
curl_easy_cleanup(curl);
return NULL;
}
static void hashmeter(int thr_id, const struct timeval *diff,
unsigned long hashes_done)
{
double khashes, secs;
khashes = hashes_done / 1000.0;
secs = (double)diff->tv_sec + ((double)diff->tv_usec / 1000000.0);
if (!opt_quiet)
applog(LOG_INFO, "thread %d: %lu hashes, %.2f khash/sec",
thr_id, hashes_done,
khashes / secs);
}
static bool get_work(struct thr_info *thr, struct work *work)
{
struct workio_cmd *wc;
struct work *work_heap;
/* fill out work request message */
wc = calloc(1, sizeof(*wc));
if (!wc)
return false;
wc->cmd = WC_GET_WORK;
wc->thr = thr;
/* send work request to workio thread */
if (!tq_push(thr_info[work_thr_id].q, wc)) {
workio_cmd_free(wc);
return false;
}
/* wait for response, a unit of work */
work_heap = tq_pop(thr->q, NULL);
if (!work_heap)
return false;
/* copy returned work into storage provided by caller */
memcpy(work, work_heap, sizeof(*work));
free(work_heap);
return true;
}
static bool submit_work(struct thr_info *thr, const struct work *work_in)
{
struct workio_cmd *wc;
/* fill out work request message */
wc = calloc(1, sizeof(*wc));
if (!wc)
return false;
wc->u.work = malloc(sizeof(*work_in));
if (!wc->u.work)
goto err_out;
wc->cmd = WC_SUBMIT_WORK;
wc->thr = thr;
memcpy(wc->u.work, work_in, sizeof(*work_in));
/* send solution to workio thread */
if (!tq_push(thr_info[work_thr_id].q, wc))
goto err_out;
return true;
err_out:
workio_cmd_free(wc);
return false;
}
static void *miner_thread(void *userdata)
{
struct thr_info *mythr = userdata;
int thr_id = mythr->id;
uint32_t max_nonce = 0xffffff;
unsigned char *scratchbuf = NULL;
/* Set worker threads to nice 19 and then preferentially to SCHED_IDLE
* and if that fails, then SCHED_BATCH. No need for this to be an
* error if it fails */
setpriority(PRIO_PROCESS, 0, 19);
drop_policy();
/* Cpu affinity only makes sense if the number of threads is a multiple
* of the number of CPUs */
if (!(opt_n_threads % num_processors))
affine_to_cpu(mythr->id, mythr->id % num_processors);
if (opt_algo == ALGO_SCRYPT)
{
scratchbuf = malloc(131583);
max_nonce = 0xffff;
}
while (1) {
struct work work __attribute__((aligned(128)));
unsigned long hashes_done;
struct timeval tv_start, tv_end, diff;
uint64_t max64;
bool rc;
/* obtain new work from internal workio thread */
if (unlikely(!get_work(mythr, &work))) {
applog(LOG_ERR, "work retrieval failed, exiting "
"mining thread %d", mythr->id);
goto out;
}
hashes_done = 0;
gettimeofday(&tv_start, NULL);
/* scan nonces for a proof-of-work hash */
switch (opt_algo) {
case ALGO_C:
rc = scanhash_c(thr_id, work.midstate, work.data + 64,
work.hash1, work.hash, work.target,
max_nonce, &hashes_done);
break;
#ifdef WANT_X8664_SSE2
case ALGO_SSE2_64: {
unsigned int rc5 =
scanhash_sse2_64(thr_id, work.midstate, work.data + 64,
work.hash1, work.hash,
work.target,
max_nonce, &hashes_done);
rc = (rc5 == -1) ? false : true;
}
break;
#endif
#ifdef WANT_SSE2_4WAY
case ALGO_4WAY: {
unsigned int rc4 =
ScanHash_4WaySSE2(thr_id, work.midstate, work.data + 64,
work.hash1, work.hash,
work.target,
max_nonce, &hashes_done);
rc = (rc4 == -1) ? false : true;
}
break;
#endif
#ifdef WANT_VIA_PADLOCK
case ALGO_VIA:
rc = scanhash_via(thr_id, work.data, work.target,
max_nonce, &hashes_done);
break;
#endif
case ALGO_CRYPTOPP:
rc = scanhash_cryptopp(thr_id, work.midstate, work.data + 64,
work.hash1, work.hash, work.target,
max_nonce, &hashes_done);
break;
#ifdef WANT_CRYPTOPP_ASM32
case ALGO_CRYPTOPP_ASM32:
rc = scanhash_asm32(thr_id, work.midstate, work.data + 64,
work.hash1, work.hash, work.target,
max_nonce, &hashes_done);
break;
#endif
case ALGO_SCRYPT:
rc = scanhash_scrypt(thr_id, work.data, scratchbuf,
work.target, max_nonce, &hashes_done);
break;
default:
/* should never happen */
goto out;
}
/* record scanhash elapsed time */
gettimeofday(&tv_end, NULL);
timeval_subtract(&diff, &tv_end, &tv_start);
hashmeter(thr_id, &diff, hashes_done);
/* adjust max_nonce to meet target scan time */
if (diff.tv_usec > 500000)
diff.tv_sec++;
if (diff.tv_sec > 0) {
max64 =
((uint64_t)hashes_done * opt_scantime) / diff.tv_sec;
if (max64 > 0xfffffffaULL)
max64 = 0xfffffffaULL;
max_nonce = max64;
}
/* if nonce found, submit work */
if (rc && !submit_work(mythr, &work))
break;
}
out:
tq_freeze(mythr->q);
return NULL;
}
static void restart_threads(void)
{
int i;
for (i = 0; i < opt_n_threads; i++)
work_restart[i].restart = 1;
}
static void *longpoll_thread(void *userdata)
{
struct thr_info *mythr = userdata;
CURL *curl = NULL;
char *copy_start, *hdr_path, *lp_url = NULL;
bool need_slash = false;
int failures = 0;
hdr_path = tq_pop(mythr->q, NULL);
if (!hdr_path)
goto out;
/* full URL */
if (strstr(hdr_path, "://")) {
lp_url = hdr_path;
hdr_path = NULL;
}
/* absolute path, on current server */
else {
copy_start = (*hdr_path == '/') ? (hdr_path + 1) : hdr_path;
if (rpc_url[strlen(rpc_url) - 1] != '/')
need_slash = true;
lp_url = malloc(strlen(rpc_url) + strlen(copy_start) + 2);
if (!lp_url)
goto out;
sprintf(lp_url, "%s%s%s", rpc_url, need_slash ? "/" : "", copy_start);
}
applog(LOG_INFO, "Long-polling activated for %s", lp_url);
curl = curl_easy_init();
if (unlikely(!curl)) {
applog(LOG_ERR, "CURL initialization failed");
goto out;
}
while (1) {
json_t *val;
val = json_rpc_call(curl, lp_url, rpc_userpass, rpc_req,
false, true);
if (likely(val)) {
failures = 0;
json_decref(val);
applog(LOG_INFO, "LONGPOLL detected new block");
restart_threads();
} else {
if (failures++ < 10) {
sleep(30);
applog(LOG_ERR,
"longpoll failed, sleeping for 30s");
} else {
applog(LOG_ERR,
"longpoll failed, ending thread");
goto out;
}
}
}
out:
free(hdr_path);
free(lp_url);
tq_freeze(mythr->q);
if (curl)
curl_easy_cleanup(curl);
return NULL;
}
static void show_usage(void)
{
int i;
printf("minerd version %s\n\n", VERSION);
printf("Usage:\tminerd [options]\n\nSupported options:\n");
for (i = 0; i < ARRAY_SIZE(options_help); i++) {
struct option_help *h;
h = &options_help[i];
printf("--%s\n%s\n\n", h->name, h->helptext);
}
exit(1);
}
static void parse_arg (int key, char *arg)
{
int v, i;
switch(key) {
case 'a':
for (i = 0; i < ARRAY_SIZE(algo_names); i++) {
if (algo_names[i] &&
!strcmp(arg, algo_names[i])) {
opt_algo = i;
break;
}
}
if (i == ARRAY_SIZE(algo_names))
show_usage();
break;
case 'c': {
json_error_t err;
if (opt_config)
json_decref(opt_config);
#if JANSSON_VERSION_HEX >= 0x020000
opt_config = json_load_file(arg, 0, &err);
#else
opt_config = json_load_file(arg, &err);
#endif
if (!json_is_object(opt_config)) {
applog(LOG_ERR, "JSON decode of %s failed", arg);
show_usage();
}
break;
}
case 'q':
opt_quiet = true;
break;
case 'D':
opt_debug = true;
break;
case 'p':
free(rpc_pass);
rpc_pass = strdup(arg);
break;
case 'P':
opt_protocol = true;
break;
case 'r':
v = atoi(arg);
if (v < -1 || v > 9999) /* sanity check */
show_usage();
opt_retries = v;
break;
case 'R':
v = atoi(arg);
if (v < 1 || v > 9999) /* sanity check */
show_usage();
opt_fail_pause = v;
break;
case 's':
v = atoi(arg);
if (v < 1 || v > 9999) /* sanity check */
show_usage();
opt_scantime = v;
break;
case 't':
v = atoi(arg);
if (v < 1 || v > 9999) /* sanity check */
show_usage();
opt_n_threads = v;
break;
case 'u':
free(rpc_user);
rpc_user = strdup(arg);
break;
case 1001: /* --url */
if (strncmp(arg, "http://", 7) &&
strncmp(arg, "https://", 8))
show_usage();
free(rpc_url);
rpc_url = strdup(arg);
break;
case 1002: /* --userpass */
if (!strchr(arg, ':'))
show_usage();
free(rpc_userpass);
rpc_userpass = strdup(arg);
break;
case 1003:
want_longpoll = false;
break;
case 1004:
use_syslog = true;
break;
default:
show_usage();
}
#ifdef WIN32
if (!opt_n_threads)
opt_n_threads = 1;
#else
num_processors = sysconf(_SC_NPROCESSORS_ONLN);
if (!opt_n_threads)
opt_n_threads = num_processors;
#endif /* !WIN32 */
}
static void parse_config(void)
{
int i;
json_t *val;
if (!json_is_object(opt_config))
return;
for (i = 0; i < ARRAY_SIZE(options); i++) {
if (!options[i].name)
break;
if (!strcmp(options[i].name, "config"))
continue;
val = json_object_get(opt_config, options[i].name);
if (!val)
continue;
if (options[i].has_arg && json_is_string(val)) {
char *s = strdup(json_string_value(val));
if (!s)
break;
parse_arg(options[i].val, s);
free(s);
} else if (!options[i].has_arg && json_is_true(val))
parse_arg(options[i].val, "");
else
applog(LOG_ERR, "JSON option %s invalid",
options[i].name);
}
}
static void parse_cmdline(int argc, char *argv[])
{
int key;
while (1) {
key = getopt_long(argc, argv, "a:c:qDPr:s:t:h?", options, NULL);
if (key < 0)
break;
parse_arg(key, optarg);
}
parse_config();
}
int main (int argc, char *argv[])
{
struct thr_info *thr;
int i;
rpc_url = strdup(DEF_RPC_URL);
/* parse command line */
parse_cmdline(argc, argv);
if (!rpc_userpass) {
if (!rpc_user || !rpc_pass) {
applog(LOG_ERR, "No login credentials supplied");
return 1;
}
rpc_userpass = malloc(strlen(rpc_user) + strlen(rpc_pass) + 2);
if (!rpc_userpass)
return 1;
sprintf(rpc_userpass, "%s:%s", rpc_user, rpc_pass);
}
pthread_mutex_init(&time_lock, NULL);
#ifdef HAVE_SYSLOG_H
if (use_syslog)
openlog("cpuminer", LOG_PID, LOG_USER);
#endif
work_restart = calloc(opt_n_threads, sizeof(*work_restart));
if (!work_restart)
return 1;
thr_info = calloc(opt_n_threads + 2, sizeof(*thr));
if (!thr_info)
return 1;
/* init workio thread info */
work_thr_id = opt_n_threads;
thr = &thr_info[work_thr_id];
thr->id = work_thr_id;
thr->q = tq_new();
if (!thr->q)
return 1;
/* start work I/O thread */
if (pthread_create(&thr->pth, NULL, workio_thread, thr)) {
applog(LOG_ERR, "workio thread create failed");
return 1;
}
/* init longpoll thread info */
if (want_longpoll) {
longpoll_thr_id = opt_n_threads + 1;
thr = &thr_info[longpoll_thr_id];
thr->id = longpoll_thr_id;
thr->q = tq_new();
if (!thr->q)
return 1;
/* start longpoll thread */
if (unlikely(pthread_create(&thr->pth, NULL, longpoll_thread, thr))) {
applog(LOG_ERR, "longpoll thread create failed");
return 1;
}
} else
longpoll_thr_id = -1;
/* start mining threads */
for (i = 0; i < opt_n_threads; i++) {
thr = &thr_info[i];
thr->id = i;
thr->q = tq_new();
if (!thr->q)
return 1;
if (unlikely(pthread_create(&thr->pth, NULL, miner_thread, thr))) {
applog(LOG_ERR, "thread %d create failed", i);
return 1;
}
sleep(1); /* don't pound RPC server all at once */
}
applog(LOG_INFO, "%d miner threads started, "
"using SHA256 '%s' algorithm.",
opt_n_threads,
algo_names[opt_algo]);
/* main loop - simply wait for workio thread to exit */
pthread_join(thr_info[work_thr_id].pth, NULL);
applog(LOG_INFO, "workio thread dead, exiting.");
return 0;
}
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