Convert control lock to cglock.

cgminer.c

@@ -189,7 +189,7 @@ pthread_cond_t gws_cond;
 double total_mhashes_done;
 static struct timeval total_tv_start, total_tv_end;
 
-pthread_mutex_t control_lock;
+cglock_t control_lock;
 pthread_mutex_t stats_lock;
 
 int hw_errors;
@@ -468,9 +468,9 @@ struct pool *current_pool(void)
 {
 	struct pool *pool;
 
-	mutex_lock(&control_lock);
+	cg_rlock(&control_lock);
 	pool = currentpool;
-	mutex_unlock(&control_lock);
+	cg_runlock(&control_lock);
 	return pool;
 }
 
@@ -1388,9 +1388,9 @@ static struct work *make_work(void)
 
 	if (unlikely(!work))
 		quit(1, "Failed to calloc work in make_work");
-	mutex_lock(&control_lock);
+	cg_wlock(&control_lock);
 	work->id = total_work++;
-	mutex_unlock(&control_lock);
+	cg_wunlock(&control_lock);
 	return work;
 }
 
@@ -2374,12 +2374,12 @@ static uint64_t share_diff(const struct work *work)
 	if (unlikely(!d64))
 		d64 = 1;
 	ret = diffone / d64;
-	mutex_lock(&control_lock);
+	cg_wlock(&control_lock);
 	if (ret > best_diff) {
 		best_diff = ret;
 		suffix_string(best_diff, best_share, 0);
 	}
-	mutex_unlock(&control_lock);
+	cg_wunlock(&control_lock);
 	return ret;
 }
 
@@ -3256,7 +3256,7 @@ void switch_pools(struct pool *selected)
 	struct pool *pool, *last_pool;
 	int i, pool_no, next_pool;
 
-	mutex_lock(&control_lock);
+	cg_wlock(&control_lock);
 	last_pool = currentpool;
 	pool_no = currentpool->pool_no;
 
@@ -3311,7 +3311,7 @@ void switch_pools(struct pool *selected)
 
 	currentpool = pools[pool_no];
 	pool = currentpool;
-	mutex_unlock(&control_lock);
+	cg_wunlock(&control_lock);
 
 	/* Set the lagging flag to avoid pool not providing work fast enough
 	 * messages in failover only mode since  we have to get all fresh work
@@ -4987,9 +4987,9 @@ static inline int cp_prio(void)
 {
 	int prio;
 
-	mutex_lock(&control_lock);
+	cg_rlock(&control_lock);
 	prio = currentpool->prio;
-	mutex_unlock(&control_lock);
+	cg_runlock(&control_lock);
 	return prio;
 }
 
@@ -6460,7 +6460,7 @@ int main(int argc, char *argv[])
 	mutex_init(&hash_lock);
 	mutex_init(&qd_lock);
 	mutex_init(&console_lock);
-	mutex_init(&control_lock);
+	cglock_init(&control_lock);
 	mutex_init(&stats_lock);
 	mutex_init(&sharelog_lock);
 	mutex_init(&ch_lock);