ccminer/cpu-miner.c

/*
 * Copyright 2010 Jeff Garzik
 * Copyright 2012-2014 pooler
 *
 * 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 <inttypes.h>
#include <unistd.h>
#include <sys/time.h>
#include <time.h>
#include <signal.h>
#ifdef WIN32
#include <windows.h>
#include <stdint.h>
BOOL WINAPI ConsoleHandler(DWORD);
#else
#include <errno.h>
#include <sys/resource.h>
#if HAVE_SYS_SYSCTL_H
#include <sys/types.h>
#if HAVE_SYS_PARAM_H
#include <sys/param.h>
#endif
#include <sys/sysctl.h>
#endif
#endif
#include <jansson.h>
#include <curl/curl.h>
#include <openssl/sha.h>
#include "compat.h"
#include "miner.h"

#ifdef WIN32
#include <Mmsystem.h>
#pragma comment(lib, "winmm.lib")
#endif

#define PROGRAM_NAME		"minerd"
#define LP_SCANTIME		60
#define HEAVYCOIN_BLKHDR_SZ		84
#define MNR_BLKHDR_SZ 80

// from heavy.cu
#ifdef __cplusplus
extern "C"
{
#endif
int cuda_num_devices();
void cuda_devicenames();
void cuda_devicereset();
int cuda_finddevice(char *name);
#ifdef __cplusplus
}
#endif


#ifdef __linux /* Linux specific policy and affinity management */
#include <sched.h>
static inline void drop_policy(void)
{
	struct sched_param param;
	param.sched_priority = 0;

#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);
}
#elif defined(__FreeBSD__) /* FreeBSD specific policy and affinity management */
#include <sys/cpuset.h>
static inline void drop_policy(void)
{
}

static inline void affine_to_cpu(int id, int cpu)
{
	cpuset_t set;
	CPU_ZERO(&set);
	CPU_SET(cpu, &set);
	cpuset_setaffinity(CPU_LEVEL_WHICH, CPU_WHICH_TID, -1, sizeof(cpuset_t), &set);
}
#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;
};

typedef enum {
	ALGO_HEAVY,		/* Heavycoin hash */
	ALGO_MJOLLNIR,		/* Mjollnir hash */
	ALGO_FUGUE256,		/* Fugue256 */
	ALGO_GROESTL,
	ALGO_MYR_GR,
	ALGO_JACKPOT,
	ALGO_QUARK,
	ALGO_ANIME,
	ALGO_FRESH,
	ALGO_NIST5,
	ALGO_WHC,
	ALGO_X11,
	ALGO_X13,
	ALGO_X14,
	ALGO_X15,
	ALGO_X17,
	ALGO_M7,
	ALGO_DMD_GR,
} sha256_algos;

static const char *algo_names[] = {
	"heavy",
	"mjollnir",
	"fugue256",
	"groestl",
	"myr-gr",
	"jackpot",
	"quark",
	"anime",
	"fresh",
	"nist5",
	"whirl",
	"x11",
	"x13",
	"x14",
	"x15",
	"x17",
	"m7",
	"dmd-gr",
};

bool opt_debug = false;
bool opt_protocol = false;
bool opt_benchmark = false;
bool want_longpoll = true;
bool have_longpoll = false;
bool want_stratum = true;
bool have_stratum = false;
static bool submit_old = false;
bool use_syslog = false;
bool use_colors = false;
static bool opt_background = false;
static bool opt_quiet = false;
static int opt_retries = -1;
static int opt_fail_pause = 30;
int opt_timeout = 270;
static int opt_scantime = 5;
static json_t *opt_config;
static const bool opt_time = true;
static sha256_algos opt_algo = ALGO_HEAVY;
static int opt_n_threads = 0;
static double opt_difficulty = 1; // CH
bool opt_trust_pool = false;
uint16_t opt_vote = 9999;
static int num_processors;
int device_map[8] = {0,1,2,3,4,5,6,7}; // CB
char *device_name[8]; // CB
static char *rpc_url;
static char *rpc_userpass;
static char *rpc_user, *rpc_pass;
char *opt_cert;
char *opt_proxy;
long opt_proxy_type;
struct thr_info *thr_info;
static int work_thr_id;
int longpoll_thr_id = -1;
int stratum_thr_id = -1;
struct work_restart *work_restart = NULL;
static struct stratum_ctx stratum;
pthread_mutex_t applog_lock;
static pthread_mutex_t stats_lock;

static unsigned long accepted_count = 0L;
static unsigned long rejected_count = 0L;
static double *thr_hashrates;

#ifdef HAVE_GETOPT_LONG
#include <getopt.h>
#else
struct option {
	const char *name;
	int has_arg;
	int *flag;
	int val;
};
#endif

static char const usage[] = "\
Usage: " PROGRAM_NAME " [OPTIONS]\n\
Options:\n\
  -a, --algo=ALGO       specify the algorithm to use\n\
                        fugue256  Fuguecoin hash\n\
                        heavy     Heavycoin hash\n\
                        mjollnir  Mjollnircoin hash\n\
                        groestl   Groestlcoin hash\n\
                        myr-gr    Myriad-Groestl hash\n\
                        jackpot   Jackpot hash\n\
                        quark     Quark hash\n\
                        anime     Animecoin hash\n\
                        fresh     Freshcoin hash (shavite 80)\n\
                        nist5     NIST5 (TalkCoin) hash\n\
                        whirl     Whirlcoin (old whirlpool)\n\
                        x11       X11 (DarkCoin) hash\n\
                        x13       X13 (MaruCoin) hash\n\
                        x14       X14 hash\n\
                        x15       X15 hash\n\
                        x17       X17 (peoplecurrency) hash\n\
                        m7        M7  (crytonite) hash\n\
                        dmd-gr    Diamond-Groestl hash\n\
  -d, --devices         takes a comma separated list of CUDA devices to use.\n\
                        Device IDs start counting from 0! Alternatively takes\n\
                        string names of your cards like gtx780ti or gt640#2\n\
                        (matching 2nd gt640 in the PC)\n\
  -f, --diff            Divide difficulty by this factor (std is 1) \n\
  -v, --vote=VOTE       block reward vote (for HeavyCoin)\n\
  -m, --trust-pool      trust the max block reward vote (maxvote) sent by the pool\n\
  -o, --url=URL         URL of mining server\n\
  -O, --userpass=U:P    username:password pair for mining server\n\
  -u, --user=USERNAME   username for mining server\n\
  -p, --pass=PASSWORD   password for mining server\n\
      --cert=FILE       certificate for mining server using SSL\n\
  -x, --proxy=[PROTOCOL://]HOST[:PORT]  connect through a proxy\n\
  -t, --threads=N       number of miner threads (default: number of nVidia GPUs)\n\
  -r, --retries=N       number of times to retry if a network call fails\n\
                          (default: retry indefinitely)\n\
  -R, --retry-pause=N   time to pause between retries, in seconds (default: 30)\n\
  -T, --timeout=N       network timeout, in seconds (default: 270)\n\
  -s, --scantime=N      upper bound on time spent scanning current work when\n\
                          long polling is unavailable, in seconds (default: 5)\n\
      --no-longpoll     disable X-Long-Polling support\n\
      --no-stratum      disable X-Stratum support\n\
  -q, --quiet           disable per-thread hashmeter output\n\
  -C, --color           enable colored output\n\
  -D, --debug           enable debug output\n\
  -P, --protocol-dump   verbose dump of protocol-level activities\n"
#ifdef HAVE_SYSLOG_H
"\
  -S, --syslog          use system log for output messages\n"
#endif
#ifndef WIN32
"\
  -B, --background      run the miner in the background\n"
#endif
"\
      --benchmark       run in offline benchmark mode\n\
      --cputest         debug hashes from cpu algorithms\n\
  -c, --config=FILE     load a JSON-format configuration file\n\
  -V, --version         display version information and exit\n\
  -h, --help            display this help text and exit\n\
";

static char const short_options[] =
#ifndef WIN32
	"B"
#endif
#ifdef HAVE_SYSLOG_H
	"S"
#endif
	"a:c:CDhp:Px:qr:R:s:t:T:o:u:O:Vd:f:mv:";

static struct option const options[] = {
	{ "algo", 1, NULL, 'a' },
#ifndef WIN32
	{ "background", 0, NULL, 'B' },
#endif
	{ "benchmark", 0, NULL, 1005 },
	{ "cputest", 0, NULL, 1006 },
	{ "cert", 1, NULL, 1001 },
	{ "config", 1, NULL, 'c' },
	{ "color", 0, NULL, 'C' },
	{ "debug", 0, NULL, 'D' },
	{ "help", 0, NULL, 'h' },
	{ "no-longpoll", 0, NULL, 1003 },
	{ "no-stratum", 0, NULL, 1007 },
	{ "pass", 1, NULL, 'p' },
	{ "protocol-dump", 0, NULL, 'P' },
	{ "proxy", 1, NULL, 'x' },
	{ "quiet", 0, NULL, 'q' },
	{ "retries", 1, NULL, 'r' },
	{ "retry-pause", 1, NULL, 'R' },
	{ "scantime", 1, NULL, 's' },
#ifdef HAVE_SYSLOG_H
	{ "syslog", 0, NULL, 'S' },
#endif
	{ "threads", 1, NULL, 't' },
	{ "vote", 1, NULL, 'v' },
	{ "trust-pool", 0, NULL, 'm' },
	{ "timeout", 1, NULL, 'T' },
	{ "url", 1, NULL, 'o' },
	{ "user", 1, NULL, 'u' },
	{ "userpass", 1, NULL, 'O' },
	{ "version", 0, NULL, 'V' },
	{ "devices", 1, NULL, 'd' },
	{ "diff", 1, NULL, 'f' },
	{ 0, 0, 0, 0 }
};

struct work {
	union {
		uint16_t data16[64];
		uint32_t data[32];
		uint64_t data64[16];
	};
	uint32_t target[8];
	uint32_t maxvote;

	uint32_t hash[8];

	char job_id[128];
	size_t xnonce2_len;
	unsigned char xnonce2[32];
};

static struct work g_work;
static time_t g_work_time;
static pthread_mutex_t g_work_lock;

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((unsigned char*)buf, hexstr, buflen))
		return false;

	return true;
}

static bool work_decode(const json_t *val, struct work *work)
{
	int i;
	int datasz = sizeof(work->data);
	if (opt_algo == ALGO_M7) {
		datasz = 122;
	}
	if (unlikely(!jobj_binary(val, "data", work->data, datasz))) {
		applog(LOG_ERR, "JSON inval data");
		goto err_out;
	}
	if (unlikely(!jobj_binary(val, "target", work->target, sizeof(work->target)))) {
		applog(LOG_ERR, "JSON inval target");
		goto err_out;
	}
	if (opt_algo == ALGO_HEAVY) {
		if (unlikely(!jobj_binary(val, "maxvote", &work->maxvote, sizeof(work->maxvote)))) {
			work->maxvote = 1024;
		}
	} else work->maxvote = 0;

	if (opt_algo == ALGO_M7)
		return true;

	for (i = 0; i < ARRAY_SIZE(work->data); i++)
		work->data[i] = le32dec(work->data + i);
	for (i = 0; i < ARRAY_SIZE(work->target); i++)
		work->target[i] = le32dec(work->target + i);

	return true;

err_out:
	return false;
}

static void share_result(int result, const char *reason)
{
	char s[345];
	double hashrate;
	int i;

	hashrate = 0.;
	pthread_mutex_lock(&stats_lock);
	for (i = 0; i < opt_n_threads; i++)
		hashrate += thr_hashrates[i];
	result ? accepted_count++ : rejected_count++;
	pthread_mutex_unlock(&stats_lock);
	
	sprintf(s, hashrate >= 1e6 ? "%.0f" : "%.2f", 1e-3 * hashrate);
	applog(LOG_NOTICE, "accepted: %lu/%lu (%.2f%%), %s khash/s %s",
			accepted_count,
			accepted_count + rejected_count,
			100. * accepted_count / (accepted_count + rejected_count),
			s,
			use_colors ?
				(result ? CL_GRN "(yay!!!)" : CL_RED "(booooo)")
			:	(result ? "(yay!!!)" : "(booooo)"));

	if (opt_debug && reason)
		applog(LOG_DEBUG, "DEBUG: reject reason: %s", reason);
}

static bool submit_upstream_work(CURL *curl, struct work *work)
{
	char *str = NULL;
	json_t *val, *res, *reason;
	char s[345];
	int i;
	bool rc = false;

	if (opt_algo == ALGO_M7) {
		if (memcmp(work->data, g_work.data, (24*4))) {
			if (opt_debug) {
				applog(LOG_DEBUG, "DEBUG: stale work detected, discarding HT=%8x <> %8x",
					work->data[19], g_work.data[19]);
			}
			return true;
		}
	}
	else
	/* pass if the previous hash is not the current previous hash */
	if (memcmp(work->data + 1, g_work.data + 1, 32)) {
		if (opt_debug)
			applog(LOG_DEBUG, "DEBUG: stale work detected, discarding");
		return true;
	}

	if (have_stratum && opt_algo == ALGO_M7) {
		uint64_t ntime, nonce;
		char *ntimestr, *noncestr, *xnonce2str;

		be64enc(&ntime, work->data64[12]);
		be32enc(&nonce, work->data[29]);
		ntimestr=bin2hex((const unsigned char *)(&ntime), 8);
		noncestr=bin2hex((const unsigned char *)(&nonce), 4);
		xnonce2str=bin2hex(work->xnonce2, work->xnonce2_len);
		sprintf(s,
			"{\"method\": \"mining.submit\", \"params\": [\"%s\", \"%s\", \"%s\", \"%s\", \"%s\"], \"id\":4}",
			rpc_user, work->job_id, xnonce2str, ntimestr, noncestr);
		free(xnonce2str);
		free(noncestr);
		free(ntimestr);

		if (unlikely(!stratum_send_line(&stratum, s))) {
			applog(LOG_ERR, "submit_upstream_work stratum_send_line failed");
			goto out;
		}
	}
	else
	if (have_stratum) {
		uint32_t ntime, nonce;
		uint16_t nvote;
		char *ntimestr, *noncestr, *xnonce2str, *nvotestr;

		le32enc(&ntime, work->data[17]);
		le32enc(&nonce, work->data[19]);
		be16enc(&nvote, *((uint16_t*)&work->data[20]));

		ntimestr = bin2hex((const unsigned char *)(&ntime), 4);
		noncestr = bin2hex((const unsigned char *)(&nonce), 4);
		xnonce2str = bin2hex(work->xnonce2, work->xnonce2_len);
		nvotestr = bin2hex((const unsigned char *)(&nvote), 2);
		if (opt_algo == ALGO_HEAVY) {
			sprintf(s,
				"{\"method\": \"mining.submit\", \"params\": [\"%s\", \"%s\", \"%s\", \"%s\", \"%s\", \"%s\"], \"id\":4}",
				rpc_user, work->job_id, xnonce2str, ntimestr, noncestr, nvotestr);
		} else {
			sprintf(s,
				"{\"method\": \"mining.submit\", \"params\": [\"%s\", \"%s\", \"%s\", \"%s\", \"%s\"], \"id\":4}",
				rpc_user, work->job_id, xnonce2str, ntimestr, noncestr);
		}
		free(ntimestr);
		free(noncestr);
		free(xnonce2str);
		free(nvotestr);

		if (unlikely(!stratum_send_line(&stratum, s))) {
			applog(LOG_ERR, "submit_upstream_work stratum_send_line failed");
			goto out;
		}
	} else {

		/* build hex string */

		if (opt_algo == ALGO_M7) {
			str = bin2hex((unsigned char *)work->data, 122);
			if (unlikely(!str)) {
				applog(LOG_ERR, "submit_upstream_work OOM");
				goto out;
			}
		}
		else
		if (opt_algo != ALGO_HEAVY && opt_algo != ALGO_MJOLLNIR) {
			for (i = 0; i < ARRAY_SIZE(work->data); i++)
				le32enc(work->data + i, work->data[i]);
			}
			str = bin2hex((unsigned char *)work->data, sizeof(work->data));
			if (unlikely(!str)) {
				applog(LOG_ERR, "submit_upstream_work OOM");
				goto out;
		}

		/* build JSON-RPC request */
		sprintf(s,
			"{\"method\": \"getwork\", \"params\": [ \"%s\" ], \"id\":1}\r\n",
			str);

		/* issue JSON-RPC request */
		val = json_rpc_call(curl, rpc_url, rpc_userpass, s, false, false, NULL);
		if (unlikely(!val)) {
			applog(LOG_ERR, "submit_upstream_work json_rpc_call failed");
			goto out;
		}

		res = json_object_get(val, "result");
		reason = json_object_get(val, "reject-reason");
		share_result(json_is_true(res), reason ? json_string_value(reason) : NULL);

		json_decref(val);
	}

	rc = true;

out:
	free(str);
	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;
	struct timeval tv_start, tv_end, diff;

	gettimeofday(&tv_start, NULL);
	val = json_rpc_call(curl, rpc_url, rpc_userpass, rpc_req,
			    want_longpoll, false, NULL);
	gettimeofday(&tv_end, NULL);

	if (have_stratum) {
		if (val)
			json_decref(val);
		return true;
	}

	if (!val)
		return false;

	rc = work_decode(json_object_get(val, "result"), work);

	if (opt_debug && rc) {
		timeval_subtract(&diff, &tv_end, &tv_start);
		applog(LOG_DEBUG, "DEBUG: got new work in %d ms",
		       diff.tv_sec * 1000 + diff.tv_usec / 1000);
	}

	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 = (struct 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 */
		if (!opt_benchmark)
			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 = (struct thr_info*)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 = (struct workio_cmd *)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 bool get_work(struct thr_info *thr, struct work *work)
{
	struct workio_cmd *wc;
	struct work *work_heap;

	if (opt_benchmark) {
		memset(work->data, 0x55, 76);
		work->data[17] = swab32((uint32_t)time(NULL));
		memset(work->data + 19, 0x00, 52);
		work->data[20] = 0x80000000;
		work->data[31] = 0x00000280;
		memset(work->target, 0x00, sizeof(work->target));
		return true;
	}

	/* fill out work request message */
	wc = (struct workio_cmd *)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 = (struct work *)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 = (struct workio_cmd *)calloc(1, sizeof(*wc));
	if (!wc)
		return false;

	wc->u.work = (struct 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 stratum_gen_work(struct stratum_ctx *sctx, struct work *work)
{
	unsigned char merkle_root[64];
	int i;

	pthread_mutex_lock(&sctx->work_lock);

	strcpy(work->job_id, sctx->job.job_id);
	work->xnonce2_len = sctx->xnonce2_size;
	memcpy(work->xnonce2, sctx->job.xnonce2, sctx->xnonce2_size);

	/* Generate merkle root */
	if (opt_algo == ALGO_HEAVY || opt_algo == ALGO_MJOLLNIR)
		heavycoin_hash(merkle_root, sctx->job.coinbase, (int)sctx->job.coinbase_size);
	else
	if (opt_algo == ALGO_FUGUE256 || opt_algo == ALGO_GROESTL || opt_algo == ALGO_WHC)
		SHA256((unsigned char*)sctx->job.coinbase, sctx->job.coinbase_size, (unsigned char*)merkle_root);
	else
		sha256d(merkle_root, sctx->job.coinbase, (int)sctx->job.coinbase_size);

	for (i = 0; i < sctx->job.merkle_count; i++) {
		memcpy(merkle_root + 32, sctx->job.merkle[i], 32);
		if (opt_algo == ALGO_HEAVY || opt_algo == ALGO_MJOLLNIR)
			heavycoin_hash(merkle_root, merkle_root, 64);
		else
			sha256d(merkle_root, merkle_root, 64);
	}
	
	/* Increment extranonce2 */
	for (i = 0; i < (int)sctx->xnonce2_size && !++sctx->job.xnonce2[i]; i++);

	/* Assemble block header */
	memset(work->data, 0, 128);
	work->data[0] = le32dec(sctx->job.version);
	for (i = 0; i < 8; i++)
		work->data[1 + i] = le32dec((uint32_t *)sctx->job.prevhash + i);
	for (i = 0; i < 8; i++)
		work->data[9 + i] = be32dec((uint32_t *)merkle_root + i);
	work->data[17] = le32dec(sctx->job.ntime);
	work->data[18] = le32dec(sctx->job.nbits);
	if (opt_algo == ALGO_MJOLLNIR)
	{
		for (i = 0; i < 20; i++)
			work->data[i] = be32dec((uint32_t *)&work->data[i]);
	}

	work->data[20] = 0x80000000;
	work->data[31] = (opt_algo == ALGO_MJOLLNIR) ? 0x000002A0 : 0x00000280;

	// HeavyCoin
	if (opt_algo == ALGO_HEAVY) {
		uint16_t *ext;
		work->maxvote = 1024;
		ext = (uint16_t*)(&work->data[20]);
		ext[0] = opt_vote;
		ext[1] = be16dec(sctx->job.nreward);

		for (i = 0; i < 20; i++)
			work->data[i] = be32dec((uint32_t *)&work->data[i]);
	}
	//

	pthread_mutex_unlock(&sctx->work_lock);

	if (opt_debug) {
		char *xnonce2str = bin2hex(work->xnonce2, sctx->xnonce2_size);
		applog(LOG_DEBUG, "DEBUG: job_id='%s' extranonce2=%s ntime=%08x",
		       work->job_id, xnonce2str, swab32(work->data[17]));
		free(xnonce2str);
	}

	if (opt_algo == ALGO_JACKPOT)
		diff_to_target(work->target, sctx->job.diff / (65536.0 * opt_difficulty));
	else if (opt_algo == ALGO_FUGUE256 || opt_algo == ALGO_GROESTL || opt_algo == ALGO_DMD_GR || opt_algo == ALGO_FRESH)
		diff_to_target(work->target, sctx->job.diff / (256.0 * opt_difficulty));
	else
		diff_to_target(work->target, sctx->job.diff / opt_difficulty);
}

static void stratum_gen_work_m7(struct stratum_ctx *sctx, struct work *work)
{
	unsigned char merkle_root[64];

	pthread_mutex_lock(&sctx->work_lock);
	strcpy(work->job_id, sctx->job.job_id);
	work->xnonce2_len = sctx->xnonce2_size;
	memcpy(work->xnonce2, sctx->job.xnonce2, sctx->xnonce2_size);

	/* Increment extranonce2 */
	for (int i = 0; i < (int) sctx->xnonce2_size && !++sctx->job.xnonce2[i]; i++);

	/* Assemble block header */
	memset(work->data, 0, 122);
	memcpy(work->data, sctx->job.m7prevblock, 32);
	memcpy(work->data + 8, sctx->job.m7accroot, 32);
	memcpy(work->data + 16, sctx->job.m7merkleroot, 32);
	work->data64[12] = be64dec(sctx->job.m7ntime);
	work->data64[13] = be64dec(sctx->job.m7height);
	unsigned char *xnonce_ptr = (unsigned char *)(work->data + 28);
	for (int i = 0; i < (int) sctx->xnonce1_size; i++) {
		*(xnonce_ptr + i) = sctx->xnonce1[i];
	}
	for (int i = 0; i < (int) work->xnonce2_len; i++) {
		*(xnonce_ptr + sctx->xnonce1_size + i) = work->xnonce2[i];
	}
	work->data16[60] = be16dec(sctx->job.m7version);

	pthread_mutex_unlock(&sctx->work_lock);
	diff_to_target(work->target, sctx->job.diff / (65536.0* opt_difficulty));

	if (opt_debug) {
		char data_str[245], target_str[65];
		cbin2hex(data_str, (unsigned char *)work->data, 122);
		applog(LOG_DEBUG, "DEBUG: stratum_gen_work data %s", data_str);
		cbin2hex(target_str, (unsigned char *)work->target, 32);
		applog(LOG_DEBUG, "DEBUG: stratum_gen_work target %s", target_str);
	}
}

static void *miner_thread(void *userdata)
{
	struct thr_info *mythr = (struct thr_info *)userdata;
	int thr_id = mythr->id;
	struct work work;
	uint32_t max_nonce;
	uint32_t end_nonce = 0xffffffffU / opt_n_threads * (thr_id + 1) - 0x20;
	unsigned char *scratchbuf = NULL;
	char s[16];
	int i;

	memset(&work, 0, sizeof(work)); // prevent work from being used uninitialized

	/* 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 */
	if (!opt_benchmark) {
		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 (num_processors > 1 && opt_n_threads % num_processors == 0) {
		if (!opt_quiet)
			applog(LOG_DEBUG, "Binding thread %d to cpu %d", thr_id,
					thr_id % num_processors);
		affine_to_cpu(thr_id, thr_id % num_processors);
	}

	while (1) {
		unsigned long hashes_done;
		struct timeval tv_start, tv_end, diff;
		int64_t max64;
		int rc;
		int wcmplen = 76;
		uint32_t* wnonce = &work.data[19];

		if (opt_algo == ALGO_M7) {
			wnonce = &work.data[29];
			wcmplen = 116;
		}

		if (have_stratum) {
			while (time(NULL) >= g_work_time + 120)
				sleep(1);
			pthread_mutex_lock(&g_work_lock);

			if (*wnonce >= end_nonce)
				if (opt_algo != ALGO_M7)
					stratum_gen_work(&stratum, &g_work);
				else if (!memcmp(work.data, g_work.data, wcmplen))
					stratum_gen_work_m7(&stratum, &g_work);
		} else {
			int min_scantime = have_longpoll ? LP_SCANTIME : opt_scantime;
			/* obtain new work from internal workio thread */
			pthread_mutex_lock(&g_work_lock);
			if (!have_stratum && (!have_longpoll ||
					time(NULL) >= g_work_time + min_scantime ||
					*wnonce >= end_nonce)) {
				if (unlikely(!get_work(mythr, &g_work))) {
					applog(LOG_ERR, "work retrieval failed, exiting "
						"mining thread %d", mythr->id);
					pthread_mutex_unlock(&g_work_lock);
					goto out;
				}
				g_work_time = have_stratum ? 0 : time(NULL);
			}
			if (have_stratum) {
				pthread_mutex_unlock(&g_work_lock);
				continue;
			}
		}
		if (memcmp(work.data, g_work.data, wcmplen)) {
			memcpy(&work, &g_work, sizeof(struct work));
			*wnonce = 0xffffffffU / opt_n_threads * thr_id;
		} else
			(*wnonce)++;
		pthread_mutex_unlock(&g_work_lock);
		work_restart[thr_id].restart = 0;

		/* adjust max_nonce to meet target scan time */
		if (have_stratum)
			max64 = LP_SCANTIME;
		else
			max64 = g_work_time + (have_longpoll ? LP_SCANTIME : opt_scantime)
			      - time(NULL);
		max64 *= (int64_t)thr_hashrates[thr_id];
		if (max64 <= 0) {
			switch (opt_algo) {
				case ALGO_JACKPOT:
					max64 = 0x1fffLL;
					break;
				case ALGO_M7:
					max64 = 0x3ffffLL;
					break;
				default:
					max64 = 0xfffffLL;
			}
		}
		if ((int64_t)*wnonce + max64 > end_nonce)
			max_nonce = end_nonce;
		else
			max_nonce = (uint32_t)(*wnonce + max64);
		hashes_done = 0;
		gettimeofday(&tv_start, NULL);

		/* scan nonces for a proof-of-work hash */
		switch (opt_algo) {

		case ALGO_HEAVY:
			rc = scanhash_heavy(thr_id, work.data, work.target,
			                      max_nonce, &hashes_done, work.maxvote, HEAVYCOIN_BLKHDR_SZ);
			break;

		case ALGO_MJOLLNIR:
			rc = scanhash_heavy(thr_id, work.data, work.target,
			                      max_nonce, &hashes_done, 0, MNR_BLKHDR_SZ);
			break;

		case ALGO_FUGUE256:
			rc = scanhash_fugue256(thr_id, work.data, work.target,
			                      max_nonce, &hashes_done);
			break;

		case ALGO_GROESTL:
		case ALGO_DMD_GR:
			rc = scanhash_groestlcoin(thr_id, work.data, work.target,
			                      max_nonce, &hashes_done);
			break;

		case ALGO_MYR_GR:
			rc = scanhash_myriad(thr_id, work.data, work.target,
			                      max_nonce, &hashes_done);
			break;

		case ALGO_JACKPOT:
			rc = scanhash_jackpot(thr_id, work.data, work.target,
			                      max_nonce, &hashes_done);
			break;

		case ALGO_QUARK:
			rc = scanhash_quark(thr_id, work.data, work.target,
			                      max_nonce, &hashes_done);
			break;

		case ALGO_ANIME:
			rc = scanhash_anime(thr_id, work.data, work.target,
			                      max_nonce, &hashes_done);
			break;

		case ALGO_FRESH:
			rc = scanhash_fresh(thr_id, work.data, work.target,
			                      max_nonce, &hashes_done);
			break;

		case ALGO_NIST5:
			rc = scanhash_nist5(thr_id, work.data, work.target,
			                      max_nonce, &hashes_done);
			break;

		case ALGO_WHC:
			rc = scanhash_whc(thr_id, work.data, work.target,
			                      max_nonce, &hashes_done);
			break;

		case ALGO_X11:
			rc = scanhash_x11(thr_id, work.data, work.target,
			                      max_nonce, &hashes_done);
			break;

		case ALGO_X13:
			rc = scanhash_x13(thr_id, work.data, work.target,
			                      max_nonce, &hashes_done);
			break;

		case ALGO_X14:
			rc = scanhash_x14(thr_id, work.data, work.target,
				max_nonce, &hashes_done);
			break;

		case ALGO_X15:
			rc = scanhash_x15(thr_id, work.data, work.target,
				max_nonce, &hashes_done);
			break;

		case ALGO_X17:
			rc = scanhash_x17(thr_id, work.data, work.target,
				max_nonce, &hashes_done);
			break;

		case ALGO_M7:
			rc = scanhash_m7(thr_id, work.data, 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);
		if (diff.tv_usec || diff.tv_sec) {
			pthread_mutex_lock(&stats_lock);
			thr_hashrates[thr_id] =
				hashes_done / (diff.tv_sec + 1e-6 * diff.tv_usec);
			pthread_mutex_unlock(&stats_lock);
		}
		if (!opt_quiet) {
			sprintf(s, thr_hashrates[thr_id] >= 1e6 ? "%.0f" : "%.2f",
				1e-3 * thr_hashrates[thr_id]);
			applog(LOG_INFO, "GPU #%d: %s, %s khash/s",
				device_map[thr_id], device_name[thr_id], s);
		}
		if (opt_benchmark && thr_id == opt_n_threads - 1) {
			double hashrate = 0.;
			for (i = 0; i < opt_n_threads && thr_hashrates[i]; i++)
				hashrate += thr_hashrates[i];
			if (i == opt_n_threads) {
				sprintf(s, hashrate >= 1e6 ? "%.0f" : "%.2f", hashrate / 1000.);
				applog(LOG_NOTICE, "Total: %s khash/s", s);
			}
		}

		/* if nonce found, submit work */
		if (rc && !opt_benchmark && !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 = (struct thr_info *)userdata;
	CURL *curl = NULL;
	char *copy_start, *hdr_path = NULL, *lp_url = NULL;
	bool need_slash = false;

	curl = curl_easy_init();
	if (unlikely(!curl)) {
		applog(LOG_ERR, "CURL initialization failed");
		goto out;
	}

start:
	hdr_path = (char*)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 = (char*)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);

	while (1) {
		json_t *val, *soval;
		int err;

		val = json_rpc_call(curl, lp_url, rpc_userpass, rpc_req,
				    false, true, &err);
		if (have_stratum) {
			if (val)
				json_decref(val);
			goto out;
		}
		if (likely(val)) {
			if (!opt_quiet) applog(LOG_INFO, "LONGPOLL detected new block");
			soval = json_object_get(json_object_get(val, "result"), "submitold");
			submit_old = soval ? json_is_true(soval) : false;
			pthread_mutex_lock(&g_work_lock);
			if (work_decode(json_object_get(val, "result"), &g_work)) {
				if (opt_debug)
					applog(LOG_BLUE, "LONGPOLL pushed new work");
				time(&g_work_time);
				restart_threads();
			}
			pthread_mutex_unlock(&g_work_lock);
			json_decref(val);
		} else {
			pthread_mutex_lock(&g_work_lock);
			g_work_time -= LP_SCANTIME;
			pthread_mutex_unlock(&g_work_lock);
			if (err == CURLE_OPERATION_TIMEDOUT) {
				restart_threads();
			} else {
				have_longpoll = false;
				restart_threads();
				free(hdr_path);
				free(lp_url);
				lp_url = NULL;
				sleep(opt_fail_pause);
				goto start;
			}
		}
	}

out:
	free(hdr_path);
	free(lp_url);
	tq_freeze(mythr->q);
	if (curl)
		curl_easy_cleanup(curl);

	return NULL;
}

static bool stratum_handle_response(char *buf)
{
	json_t *val, *err_val, *res_val, *id_val;
	json_error_t err;
	bool ret = false;

	val = JSON_LOADS(buf, &err);
	if (!val) {
		applog(LOG_INFO, "JSON decode failed(%d): %s", err.line, err.text);
		goto out;
	}

	res_val = json_object_get(val, "result");
	err_val = json_object_get(val, "error");
	id_val = json_object_get(val, "id");

	if (!id_val || json_is_null(id_val) || !res_val)
		goto out;

	share_result(json_is_true(res_val),
		err_val ? json_string_value(json_array_get(err_val, 1)) : NULL);

	ret = true;
out:
	if (val)
		json_decref(val);

	return ret;
}

static void *stratum_thread(void *userdata)
{
	struct thr_info *mythr = (struct thr_info *)userdata;
	char *s;

	stratum.url = (char*)tq_pop(mythr->q, NULL);
	if (!stratum.url)
		goto out;
	applog(LOG_INFO, "Starting Stratum on %s", stratum.url);

	while (1) {
		int failures = 0;

		while (!stratum.curl) {
			pthread_mutex_lock(&g_work_lock);
			g_work_time = 0;
			pthread_mutex_unlock(&g_work_lock);
			restart_threads();

			if (!stratum_connect(&stratum, stratum.url) ||
			    !stratum_subscribe(&stratum) ||
			    !stratum_authorize(&stratum, rpc_user, rpc_pass)) {
				stratum_disconnect(&stratum);
				if (opt_retries >= 0 && ++failures > opt_retries) {
					applog(LOG_ERR, "...terminating workio thread");
					tq_push(thr_info[work_thr_id].q, NULL);
					goto out;
				}
				if (!opt_benchmark)
					applog(LOG_ERR, "...retry after %d seconds", opt_fail_pause);
				sleep(opt_fail_pause);
			}
		}

		if (stratum.job.job_id &&
		    (strcmp(stratum.job.job_id, g_work.job_id) || !g_work_time)) {
			pthread_mutex_lock(&g_work_lock);
			if (opt_algo == ALGO_M7)
				stratum_gen_work_m7(&stratum, &g_work);
			else
				stratum_gen_work(&stratum, &g_work);
			time(&g_work_time);
			pthread_mutex_unlock(&g_work_lock);
			if (stratum.job.clean) {
				if (!opt_quiet) applog(LOG_BLUE, "Stratum detected new block");
				restart_threads();
			}
		}

		if (!stratum_socket_full(&stratum, 120)) {
			applog(LOG_ERR, "Stratum connection timed out");
			s = NULL;
		} else
			s = stratum_recv_line(&stratum);
		if (!s) {
			stratum_disconnect(&stratum);
			applog(LOG_ERR, "Stratum connection interrupted");
			continue;
		}
		if (opt_algo == ALGO_M7) {
			if (!stratum_handle_method_m7(&stratum, s))
				stratum_handle_response(s);
		} else
		if (!stratum_handle_method(&stratum, s))
			stratum_handle_response(s);
		free(s);
	}

out:
	return NULL;
}

static void show_version_and_exit(void)
{
	printf("%s\n%s\n", PACKAGE_STRING, curl_version());
	exit(0);
}

static void show_usage_and_exit(int status)
{
	if (status)
		fprintf(stderr, "Try `" PROGRAM_NAME " --help' for more information.\n");
	else
		printf(usage);
	exit(status);
}

static void parse_arg (int key, char *arg)
{
	char *p;
	int v, i;
	double d;

	switch(key) {
	case 'a':
		for (i = 0; i < ARRAY_SIZE(algo_names); i++) {
			if (algo_names[i] &&
			    !strcmp(arg, algo_names[i])) {
				opt_algo = (sha256_algos)i;
				break;
			}
		}
		if (i == ARRAY_SIZE(algo_names))
			show_usage_and_exit(1);
		break;
	case 'B':
		opt_background = true;
		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);
			exit(1);
		}
		break;
	}
	case 'C':
		use_colors = true;
		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_and_exit(1);
		opt_retries = v;
		break;
	case 'R':
		v = atoi(arg);
		if (v < 1 || v > 9999)	/* sanity check */
			show_usage_and_exit(1);
		opt_fail_pause = v;
		break;
	case 's':
		v = atoi(arg);
		if (v < 1 || v > 9999)	/* sanity check */
			show_usage_and_exit(1);
		opt_scantime = v;
		break;
	case 'T':
		v = atoi(arg);
		if (v < 1 || v > 99999)	/* sanity check */
			show_usage_and_exit(1);
		opt_timeout = v;
		break;
	case 't':
		v = atoi(arg);
		if (v < 1 || v > 9999)	/* sanity check */
			show_usage_and_exit(1);
		opt_n_threads = v;
		break;
	case 'v':
		v = atoi(arg);
		if (v < 0 || v > 1024)	/* sanity check */
			show_usage_and_exit(1);
		opt_vote = (uint16_t)v;
		break;
	case 'm':
		opt_trust_pool = true;
		break;
	case 'u':
		free(rpc_user);
		rpc_user = strdup(arg);
		break;
	case 'o':			/* --url */
		p = strstr(arg, "://");
		if (p) {
			if (strncasecmp(arg, "http://", 7) && strncasecmp(arg, "https://", 8) &&
					strncasecmp(arg, "stratum+tcp://", 14))
				show_usage_and_exit(1);
			free(rpc_url);
			rpc_url = strdup(arg);
		} else {
			if (!strlen(arg) || *arg == '/')
				show_usage_and_exit(1);
			free(rpc_url);
			rpc_url = (char*)malloc(strlen(arg) + 8);
			sprintf(rpc_url, "http://%s", arg);
		}
		p = strrchr(rpc_url, '@');
		if (p) {
			char *sp, *ap;
			*p = '\0';
			ap = strstr(rpc_url, "://") + 3;
			sp = strchr(ap, ':');
			if (sp) {
				free(rpc_userpass);
				rpc_userpass = strdup(ap);
				free(rpc_user);
				rpc_user = (char*)calloc(sp - ap + 1, 1);
				strncpy(rpc_user, ap, sp - ap);
				free(rpc_pass);
				rpc_pass = strdup(sp + 1);
			} else {
				free(rpc_user);
				rpc_user = strdup(ap);
			}
			memmove(ap, p + 1, strlen(p + 1) + 1);
		}
		have_stratum = !opt_benchmark && !strncasecmp(rpc_url, "stratum", 7);
		break;
	case 'O':			/* --userpass */
		p = strchr(arg, ':');
		if (!p)
			show_usage_and_exit(1);
		free(rpc_userpass);
		rpc_userpass = strdup(arg);
		free(rpc_user);
		rpc_user = (char*)calloc(p - arg + 1, 1);
		strncpy(rpc_user, arg, p - arg);
		free(rpc_pass);
		rpc_pass = strdup(p + 1);
		break;
	case 'x':			/* --proxy */
		if (!strncasecmp(arg, "socks4://", 9))
			opt_proxy_type = CURLPROXY_SOCKS4;
		else if (!strncasecmp(arg, "socks5://", 9))
			opt_proxy_type = CURLPROXY_SOCKS5;
#if LIBCURL_VERSION_NUM >= 0x071200
		else if (!strncasecmp(arg, "socks4a://", 10))
			opt_proxy_type = CURLPROXY_SOCKS4A;
		else if (!strncasecmp(arg, "socks5h://", 10))
			opt_proxy_type = CURLPROXY_SOCKS5_HOSTNAME;
#endif
		else
			opt_proxy_type = CURLPROXY_HTTP;
		free(opt_proxy);
		opt_proxy = strdup(arg);
		break;
	case 1001:
		free(opt_cert);
		opt_cert = strdup(arg);
		break;
	case 1005:
		opt_benchmark = true;
		want_longpoll = false;
		want_stratum = false;
		have_stratum = false;
		break;
	case 1006:
		print_hash_tests();
		exit(0);
		break;
	case 1003:
		want_longpoll = false;
		break;
	case 1007:
		want_stratum = false;
		break;
	case 'S':
		use_syslog = true;
		break;
	case 'd': // CB
		{
			char * pch = strtok (arg,",");
			opt_n_threads = 0;
			while (pch != NULL) {
				if (pch[0] >= '0' && pch[0] <= '9' && pch[1] == '\0')
				{
					if (atoi(pch) < num_processors)
						device_map[opt_n_threads++] = atoi(pch);
					else {
						applog(LOG_ERR, "Non-existant CUDA device #%d specified in -d option", atoi(pch));
						exit(1);
					}
				} else {
					int device = cuda_finddevice(pch);
					if (device >= 0 && device < num_processors)
						device_map[opt_n_threads++] = device;
					else {
						applog(LOG_ERR, "Non-existant CUDA device '%s' specified in -d option", pch);
						exit(1);
					}
				}
				pch = strtok (NULL, ",");
			}
		}
		break;
	case 'f': // CH - Divisor for Difficulty
		d = atof(arg);
		if (d == 0)	/* sanity check */
			show_usage_and_exit(1);
		opt_difficulty = d;
		break;
	case 'V':
		show_version_and_exit();
	case 'h':
		show_usage_and_exit(0);
	default:
		show_usage_and_exit(1);
	}

	if (use_syslog)
		use_colors = false;
}

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);
	}

	if (opt_algo == ALGO_HEAVY && opt_vote == 9999) {
		fprintf(stderr, "Heavycoin hash requires block reward vote parameter (see --vote)\n");
		show_usage_and_exit(1);
	}
}

static void parse_cmdline(int argc, char *argv[])
{
	int key;

	while (1) {
#if HAVE_GETOPT_LONG
		key = getopt_long(argc, argv, short_options, options, NULL);
#else
		key = getopt(argc, argv, short_options);
#endif
		if (key < 0)
			break;

		parse_arg(key, optarg);
	}
	if (optind < argc) {
		fprintf(stderr, "%s: unsupported non-option argument '%s'\n",
			argv[0], argv[optind]);
		show_usage_and_exit(1);
	}

	if (opt_algo == ALGO_HEAVY && opt_vote == 9999) {
		fprintf(stderr, "%s: Heavycoin hash requires block reward vote parameter (see --vote)\n",
			argv[0]);
		show_usage_and_exit(1);
	}

	parse_config();
}

#ifndef WIN32
static void signal_handler(int sig)
{
	switch (sig) {
	case SIGHUP:
		applog(LOG_INFO, "SIGHUP received");
		break;
	case SIGINT:
		signal(sig, SIG_IGN);
		applog(LOG_INFO, "SIGINT received, exiting");
		cuda_devicereset();
		exit(0);
		break;
	case SIGTERM:
		applog(LOG_INFO, "SIGTERM received, exiting");
		cuda_devicereset();
		exit(0);
		break;
	}
}
#else
BOOL WINAPI ConsoleHandler(DWORD dwType)
{
	switch (dwType) {
	case CTRL_C_EVENT:
		applog(LOG_INFO, "CTRL_C_EVENT received, exiting");
		cuda_devicereset();
		exit(0);
		break;
	case CTRL_BREAK_EVENT:
		applog(LOG_INFO, "CTRL_BREAK_EVENT received, exiting");
		cuda_devicereset();
		exit(0);
		break;
	default:
		return false;
	}
	return true;
}
#endif

#define PROGRAM_VERSION "1.3"
int main(int argc, char *argv[])
{
	struct thr_info *thr;
	long flags;
	int i;

	printf("*** ccMiner for nVidia GPUs by Christian Buchner and Christian H. ***\n");
	printf("\t This is the forked version "PROGRAM_VERSION" (tpruvot@github)\n");
#ifdef WIN32
	printf("\t  Built with VC++ 2013 and nVidia CUDA SDK 6.5\n\n");
#else
	printf("\t  Built with the nVidia CUDA SDK 6.5\n\n");
#endif
	printf("\t  based on pooler-cpuminer 2.3.2 (c) 2010 Jeff Garzik, 2012 pooler\n");
	printf("\t    and HVC extension from http://hvc.1gh.com/" "\n\n");
	printf("\tCuda additions Copyright 2014 Christian Buchner, Christian H.\n");
	printf("\t  BTC donation address: 16hJF5mceSojnTD3ZTUDqdRhDyPJzoRakM\n");
	printf("\tCleaned and optimized by Tanguy Pruvot\n");
	printf("\t  BTC donation address: 1AJdfCpLWPNoAMDfHF1wD5y8VgKSSTHxPo\n\n");

	rpc_user = strdup("");
	rpc_pass = strdup("");

	pthread_mutex_init(&applog_lock, NULL);
	num_processors = cuda_num_devices();

	/* parse command line */
	parse_cmdline(argc, argv);

	cuda_devicenames();

	if (!opt_benchmark && !rpc_url) {
		fprintf(stderr, "%s: no URL supplied\n", argv[0]);
		show_usage_and_exit(1);
	}

	if (!rpc_userpass) {
		rpc_userpass = (char*)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(&stats_lock, NULL);
	pthread_mutex_init(&g_work_lock, NULL);
	pthread_mutex_init(&stratum.sock_lock, NULL);
	pthread_mutex_init(&stratum.work_lock, NULL);

	flags = !opt_benchmark && strncmp(rpc_url, "https:", 6)
	      ? (CURL_GLOBAL_ALL & ~CURL_GLOBAL_SSL)
	      : CURL_GLOBAL_ALL;
	if (curl_global_init(flags)) {
		applog(LOG_ERR, "CURL initialization failed");
		return 1;
	}

#ifndef WIN32
	if (opt_background) {
		i = fork();
		if (i < 0) exit(1);
		if (i > 0) exit(0);
		i = setsid();
		if (i < 0)
			applog(LOG_ERR, "setsid() failed (errno = %d)", errno);
		i = chdir("/");
		if (i < 0)
			applog(LOG_ERR, "chdir() failed (errno = %d)", errno);
		signal(SIGHUP, signal_handler);
		signal(SIGTERM, signal_handler);
	}
	/* Always catch Ctrl+C */
	signal(SIGINT, signal_handler);
#else
	SetConsoleCtrlHandler((PHANDLER_ROUTINE)ConsoleHandler, TRUE);
#endif

	if (num_processors == 0)
	{
		applog(LOG_ERR, "No CUDA devices found! terminating.");
		exit(1);
	}
	if (!opt_n_threads)
		opt_n_threads = num_processors;

#ifdef HAVE_SYSLOG_H
	if (use_syslog)
		openlog("cpuminer", LOG_PID, LOG_USER);
#endif

	work_restart = (struct work_restart *)calloc(opt_n_threads, sizeof(*work_restart));
	if (!work_restart)
		return 1;

	thr_info = (struct thr_info *)calloc(opt_n_threads + 3, sizeof(*thr));
	if (!thr_info)
		return 1;
	
	thr_hashrates = (double *) calloc(opt_n_threads, sizeof(double));
	if (!thr_hashrates)
		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;
	}

	if (want_longpoll && !have_stratum) {
		/* init longpoll thread info */
		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;
		}
	}
	if (want_stratum) {
		/* init stratum thread info */
		stratum_thr_id = opt_n_threads + 2;
		thr = &thr_info[stratum_thr_id];
		thr->id = stratum_thr_id;
		thr->q = tq_new();
		if (!thr->q)
			return 1;

		/* start stratum thread */
		if (unlikely(pthread_create(&thr->pth, NULL, stratum_thread, thr))) {
			applog(LOG_ERR, "stratum thread create failed");
			return 1;
		}

		if (have_stratum)
			tq_push(thr_info[stratum_thr_id].q, strdup(rpc_url));
	}

	/* 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;
		}
	}

	applog(LOG_INFO, "%d miner threads started, "
		"using '%s' algorithm.",
		opt_n_threads,
		algo_names[opt_algo]);

#ifdef WIN32
	timeBeginPeriod(1); // enable high timer precision (similar to Google Chrome Trick)
#endif

	/* main loop - simply wait for workio thread to exit */
	pthread_join(thr_info[work_thr_id].pth, NULL);

#ifdef WIN32
	timeEndPeriod(1); // be nice and forego high timer precision
#endif

	applog(LOG_INFO, "workio thread dead, exiting.");

	// nvprof requires this
	cuda_devicereset();

	return 0;
}