cryptonote: untangle dependency from miner to blockchain

It causes link errors at least on mac

src/cryptonote_basic/miner.cpp

@@ -102,13 +102,13 @@ namespace cryptonote
   }
 
 
-  miner::miner(i_miner_handler* phandler, Blockchain* pbc):m_stop(1),
+  miner::miner(i_miner_handler* phandler, const get_block_hash_t &gbh):m_stop(1),
     m_template{},
     m_template_no(0),
     m_diffic(0),
     m_thread_index(0),
     m_phandler(phandler),
-    m_pbc(pbc),
+    m_gbh(gbh),
     m_height(0),
     m_threads_active(0),
     m_pausers_count(0),
@@ -471,12 +471,12 @@ namespace cryptonote
     return true;
   }
   //-----------------------------------------------------------------------------------------------------
-  bool miner::find_nonce_for_given_block(const Blockchain *pbc, block& bl, const difficulty_type& diffic, uint64_t height)
+  bool miner::find_nonce_for_given_block(const get_block_hash_t &gbh, block& bl, const difficulty_type& diffic, uint64_t height)
   {
     for(; bl.nonce != std::numeric_limits<uint32_t>::max(); bl.nonce++)
     {
       crypto::hash h;
-      get_block_longhash(pbc, bl, h, height, tools::get_max_concurrency());
+      gbh(bl, height, tools::get_max_concurrency(), h);
 
       if(check_hash(h, diffic))
       {
@@ -572,7 +572,7 @@ namespace cryptonote
 
       b.nonce = nonce;
       crypto::hash h;
-      get_block_longhash(m_pbc, b, h, height, tools::get_max_concurrency());
+      m_gbh(b, height, tools::get_max_concurrency(), h);
 
       if(check_hash(h, local_diff))
       {

src/cryptonote_basic/miner.h

@@ -52,7 +52,7 @@ namespace cryptonote
     ~i_miner_handler(){};
   };
 
-  class Blockchain;
+  typedef std::function<bool(const cryptonote::block&, uint64_t, unsigned int, crypto::hash&)> get_block_hash_t;
 
   /************************************************************************/
   /*                                                                      */
@@ -60,7 +60,7 @@ namespace cryptonote
   class miner
   {
   public: 
-    miner(i_miner_handler* phandler, Blockchain* pbc);
+    miner(i_miner_handler* phandler, const get_block_hash_t& gbh);
     ~miner();
     bool init(const boost::program_options::variables_map& vm, network_type nettype);
     static void init_options(boost::program_options::options_description& desc);
@@ -76,7 +76,7 @@ namespace cryptonote
     bool on_idle();
     void on_synchronized();
     //synchronous analog (for fast calls)
-    static bool find_nonce_for_given_block(const Blockchain *pbc, block& bl, const difficulty_type& diffic, uint64_t height);
+    static bool find_nonce_for_given_block(const get_block_hash_t &gbh, block& bl, const difficulty_type& diffic, uint64_t height);
     void pause();
     void resume();
     void do_print_hashrate(bool do_hr);
@@ -135,7 +135,7 @@ namespace cryptonote
     std::list<boost::thread> m_threads;
     epee::critical_section m_threads_lock;
     i_miner_handler* m_phandler;
-    Blockchain* m_pbc;
+    get_block_hash_t m_gbh;
     account_public_address m_mine_address;
     epee::math_helper::once_a_time_seconds<5> m_update_block_template_interval;
     epee::math_helper::once_a_time_seconds<2> m_update_merge_hr_interval;

src/cryptonote_core/cryptonote_core.cpp

@@ -223,7 +223,9 @@ namespace cryptonote
   core::core(i_cryptonote_protocol* pprotocol):
               m_mempool(m_blockchain_storage),
               m_blockchain_storage(m_mempool),
-              m_miner(this, &m_blockchain_storage),
+              m_miner(this, [this](const cryptonote::block &b, uint64_t height, unsigned int threads, crypto::hash &hash) {
+                return cryptonote::get_block_longhash(&m_blockchain_storage, b, hash, height, threads);
+              }),
               m_starter_message_showed(false),
               m_target_blockchain_height(0),
               m_checkpoints_path(""),

src/cryptonote_core/cryptonote_tx_utils.cpp

@@ -663,7 +663,9 @@ namespace cryptonote
     bl.minor_version = CURRENT_BLOCK_MINOR_VERSION;
     bl.timestamp = 0;
     bl.nonce = nonce;
-    miner::find_nonce_for_given_block(NULL, bl, 1, 0);
+    miner::find_nonce_for_given_block([](const cryptonote::block &b, uint64_t height, unsigned int threads, crypto::hash &hash){
+      return cryptonote::get_block_longhash(NULL, b, hash, height, threads);
+    }, bl, 1, 0);
     bl.invalidate_hashes();
     return true;
   }

src/rpc/core_rpc_server.cpp

@@ -1833,7 +1833,9 @@ namespace cryptonote
         return false;
       }
       b.nonce = req.starting_nonce;
-      miner::find_nonce_for_given_block(&(m_core.get_blockchain_storage()), b, template_res.difficulty, template_res.height);
+      miner::find_nonce_for_given_block([this](const cryptonote::block &b, uint64_t height, unsigned int threads, crypto::hash &hash) {
+        return cryptonote::get_block_longhash(&(m_core.get_blockchain_storage()), b, hash, height, threads);
+      }, b, template_res.difficulty, template_res.height);
 
       submit_req.front() = string_tools::buff_to_hex_nodelimer(block_to_blob(b));
       r = on_submitblock(submit_req, submit_res, error_resp, ctx);

tests/core_tests/chaingen.cpp

@@ -186,7 +186,9 @@ bool test_generator::construct_block(cryptonote::block& blk, uint64_t height, co
 
   // Nonce search...
   blk.nonce = 0;
-  while (!miner::find_nonce_for_given_block(NULL, blk, get_test_difficulty(hf_ver), height))
+  while (!miner::find_nonce_for_given_block([](const cryptonote::block &b, uint64_t height, unsigned int threads, crypto::hash &hash){
+    return cryptonote::get_block_longhash(NULL, b, hash, height, threads);
+  }, blk, get_test_difficulty(hf_ver), height))
     blk.timestamp++;
 
   add_block(blk, txs_weight, block_weights, already_generated_coins, hf_ver ? hf_ver.get() : 1);
@@ -797,7 +799,9 @@ void fill_tx_sources_and_destinations(const std::vector<test_event_entry>& event
 void fill_nonce(cryptonote::block& blk, const difficulty_type& diffic, uint64_t height)
 {
   blk.nonce = 0;
-  while (!miner::find_nonce_for_given_block(NULL, blk, diffic, height))
+  while (!miner::find_nonce_for_given_block([](const cryptonote::block &b, uint64_t height, unsigned int threads, crypto::hash &hash){
+    return cryptonote::get_block_longhash(NULL, b, hash, height, threads);
+  }, blk, diffic, height))
     blk.timestamp++;
 }