Remove retainer, add block allocation metadata.

include/bitcoin/node/block_arena.hpp

@@ -40,12 +40,6 @@ class BCN_API block_arena final
 
     block_arena& operator=(block_arena&& other) NOEXCEPT;
 
-    /// Get memory block retainer mutex.
-    inline std::shared_mutex& get_mutex() NOEXCEPT
-    {
-        return mutex_;
-    }
-
     void* require(size_t bytes) NOEXCEPT override;
 
 private:
@@ -57,7 +51,6 @@ class BCN_API block_arena final
     size_t capacity() const NOEXCEPT;
 
     // These are thread safe (set only construct).
-    std::shared_mutex mutex_{};
     uint8_t* memory_map_;
     size_t size_;
 

include/bitcoin/node/block_memory.hpp

@@ -40,9 +40,6 @@ class BCN_API block_memory final
     /// Each thread obtains an arena of the same size.
     arena* get_arena() NOEXCEPT override;
 
-    /// Each thread obtains its arena's retainer.
-    retainer::ptr get_retainer(size_t allocation=zero) NOEXCEPT override;
-
 protected:
     block_arena* get_block_arena() const THROWS;
 

src/block_arena.cpp

@@ -61,10 +61,7 @@ block_arena::block_arena(block_arena&& other) NOEXCEPT
 block_arena::~block_arena() NOEXCEPT
 {
     if (!is_null(memory_map_))
-    {
-        std::unique_lock lock(mutex_);
         free(memory_map_);
-    }
 }
 
 block_arena& block_arena::operator=(block_arena&& other) NOEXCEPT
@@ -88,10 +85,7 @@ size_t block_arena::capacity() const NOEXCEPT
 void* block_arena::require(size_t bytes) NOEXCEPT
 {
     if (bytes > capacity())
-    {
-        std::unique_lock lock{ mutex_ };
         offset_ = zero;
-    }
 
     return memory_map_ + offset_;
 }

src/block_memory.cpp

@@ -40,12 +40,6 @@ arena* block_memory::get_arena() NOEXCEPT
     return get_block_arena();
 }
 
-retainer::ptr block_memory::get_retainer(size_t allocation) NOEXCEPT
-{
-    return std::make_shared<retainer>(get_block_arena()->get_mutex(),
-        allocation);
-}
-
 // protected
 block_arena* block_memory::get_block_arena() const THROWS
 {

src/protocols/protocol_block_in_31800.cpp

@@ -392,7 +392,7 @@ void protocol_block_in_31800::complete(const code& ec,
     {
         notify(ec, chase::checked, height);
         fire(events::block_archived, height);
-        ////const auto bytes = block->get_retainer()->allocation();
+        ////const auto bytes = block->get_allocation();
     }
 }