optimize some data transferring and throw sol::error instead of writing to std::cerr

src/shared-table.cpp

@@ -16,14 +16,13 @@ sol::object SharedTable::getUserType(sol::state_view &lua) noexcept {
     return sol::stack::pop<sol::object>(lua);
 }
 
-void SharedTable::set(StoredObject key, StoredObject value) noexcept {
+void SharedTable::set(StoredObject&& key, StoredObject&& value) noexcept {
     std::lock_guard<SpinMutex> g(lock_);
     data_[std::move(key)] = std::move(value);
 }
 
-void SharedTable::luaSet(sol::stack_object luaKey, sol::stack_object luaValue) {
-    if (!luaKey.valid())
-        throw sol::error("Invalid table index");
+void SharedTable::luaSet(const sol::stack_object& luaKey, const sol::stack_object& luaValue) {
+    ASSERT(luaKey.valid()) << "Invalid table index";
 
     StoredObject key(luaKey);
     if (luaValue.get_type() == sol::type::nil) {
@@ -31,13 +30,11 @@ void SharedTable::luaSet(sol::stack_object luaKey, sol::stack_object luaValue) {
         // in this case object is not obligatory to own data
         data_.erase(key);
     } else {
-        StoredObject value(luaValue);
-        std::lock_guard<SpinMutex> g(lock_);
-        data_[std::move(key)] = std::move(value);
+        set(std::move(key), StoredObject(luaValue));
     }
 }
 
-sol::object SharedTable::luaGet(sol::stack_object key, sol::this_state state) const noexcept {
+sol::object SharedTable::luaGet(const sol::stack_object& key, const sol::this_state& state) const noexcept {
     assert(key.valid());
 
     StoredObject cppKey(key);

src/shared-table.h

@@ -17,12 +17,12 @@ public:
     virtual ~SharedTable() = default;
 
     static sol::object getUserType(sol::state_view &lua) noexcept;
-    void set(StoredObject, StoredObject) noexcept;
+    void set(StoredObject&&, StoredObject&&) noexcept;
     size_t size() const noexcept;
 
 public: // lua bindings
-    void luaSet(sol::stack_object luaKey, sol::stack_object luaValue);
-    sol::object luaGet(sol::stack_object key, sol::this_state state) const noexcept;
+    void luaSet(const sol::stack_object& luaKey, const sol::stack_object& luaValue);
+    sol::object luaGet(const sol::stack_object& key, const sol::this_state& state) const noexcept;
 
 protected:
     mutable SpinMutex lock_;

src/stored-object.cpp

@@ -16,17 +16,17 @@ namespace {
 template<typename StoredType>
 class PrimitiveHolder : public BaseHolder {
 public:
-    PrimitiveHolder(sol::stack_object luaObject) noexcept
+    PrimitiveHolder(const sol::stack_object& luaObject) noexcept
             : BaseHolder(luaObject.get_type()), data_(luaObject.as<StoredType>()) {}
 
-    PrimitiveHolder(sol::object luaObject) noexcept
+    PrimitiveHolder(const sol::object& luaObject) noexcept
             : BaseHolder(luaObject.get_type()), data_(luaObject.as<StoredType>()) {}
 
     PrimitiveHolder(sol::type type, const StoredType& init) noexcept
             : BaseHolder(type), data_(init) {}
 
     bool rawCompare(const BaseHolder* other) const noexcept final {
-        assert(type_ == other->type());
+        ASSERT(type_ == other->type());
         return static_cast<const PrimitiveHolder<StoredType>*>(other)->data_ == data_;
     }
 
@@ -50,7 +50,7 @@ public:
         sol::state_view lua(luaObject.lua_state());
         sol::function dumper = lua["string"]["dump"];
 
-        assert(dumper.valid());
+        ASSERT(dumper.valid());
         function_ = dumper(luaObject);
     }
 
@@ -65,14 +65,11 @@ public:
     sol::object unpack(sol::this_state state) const noexcept final {
         sol::state_view lua((lua_State*)state);
         sol::function loader = lua["loadstring"];
-        assert(loader.valid());
+        ASSERT(loader.valid());
 
         sol::function result = loader(function_);
-        if (!result.valid()) {
-            ERROR << "Unable to restore function!" << std::endl;
-            ERROR << "Content:" << std::endl;
-            ERROR << function_ << std::endl;
-        }
+        ASSERT(result.valid()) << "Unable to restore function!" << std::endl
+            << "Content:" << std::endl << function_ << std::endl;
         return sol::make_object(state, result);
     }
 
@@ -115,7 +112,7 @@ void dumpTable(SharedTable* target, sol::table luaTable, SolTableToShared& visit
 }
 
 template<typename SolObject>
-std::unique_ptr<BaseHolder> fromSolObject(SolObject luaObject) {
+std::unique_ptr<BaseHolder> fromSolObject(const SolObject& luaObject) {
     switch(luaObject.get_type()) {
         case sol::type::nil:
             break;
@@ -158,11 +155,11 @@ StoredObject::StoredObject(SharedTable* table) noexcept
         : data_(new PrimitiveHolder<SharedTable*>(sol::type::userdata, table)) {
 }
 
-StoredObject::StoredObject(sol::object object) noexcept
+StoredObject::StoredObject(const sol::object& object) noexcept
         : data_(fromSolObject(object)) {
 }
 
-StoredObject::StoredObject(sol::stack_object object) noexcept
+StoredObject::StoredObject(const sol::stack_object& object) noexcept
         : data_(fromSolObject(object)) {
 }
 

src/stored-object.h

@@ -1,6 +1,6 @@
 #pragma once
 
-#include <sol.hpp>
+#include <utils.h>
 
 #include <utility>
 #include <iostream>
@@ -17,7 +17,7 @@ public:
     }
 
     bool compare(const BaseHolder* other) const noexcept {
-        assert(other != nullptr);
+        ASSERT(other != nullptr);
         return type_ == other->type_ && rawCompare(other);
     }
 
@@ -40,8 +40,8 @@ public:
     StoredObject() = default;
     StoredObject(StoredObject&& init) noexcept;
     StoredObject(SharedTable*) noexcept;
-    StoredObject(sol::object) noexcept;
-    StoredObject(sol::stack_object) noexcept;
+    StoredObject(const sol::object&) noexcept;
+    StoredObject(const sol::stack_object&) noexcept;
 
     operator bool() const noexcept;
     std::size_t hash() const noexcept;

src/threading.cpp

@@ -9,7 +9,7 @@ LuaThread::LuaThread(const sol::function& function, const sol::variadic_args& ar
 
     // 2. Create new state
     p_state_.reset(new sol::state);
-    assert(p_state_.get() != NULL);
+    ASSERT(p_state_.get() != NULL);
     p_state_->open_libraries(
         sol::lib::base, sol::lib::string,
         sol::lib::package, sol::lib::io, sol::lib::os
@@ -22,7 +22,7 @@ LuaThread::LuaThread(const sol::function& function, const sol::variadic_args& ar
 
     // 4. Run thread
     p_thread_.reset(new std::thread(&LuaThread::work, this));
-    assert(p_thread_.get() != NULL);
+    ASSERT(p_thread_.get() != NULL);
 }
 
 void LuaThread::storeArgs(const sol::variadic_args &args) noexcept {
@@ -49,15 +49,13 @@ void LuaThread::detach() noexcept {
 }
 
 void LuaThread::work() noexcept  {
-    if (p_state_.get() && p_arguments_.get()) {
-        std::string func_owner = std::move(str_function_);
-        std::shared_ptr<sol::state> state_owner = p_state_;
-        std::shared_ptr<std::vector<sol::object>> arguments_owner = p_arguments_;
-        sol::function_result func = (*state_owner)["loadstring"](func_owner);
-        func.get<sol::function>()(sol::as_args(*arguments_owner));
-    } else {
-        throw sol::error("Internal error: invalid thread Lua state");
-    }
+    ASSERT(p_state_.get() && p_arguments_.get()) << "invalid thread Lua state" << std::endl;
+
+    std::string func_owner = std::move(str_function_);
+    std::shared_ptr<sol::state> state_owner = p_state_;
+    std::shared_ptr<std::vector<sol::object>> arguments_owner = p_arguments_;
+    sol::function_result func = (*state_owner)["loadstring"](func_owner);
+    func.get<sol::function>()(sol::as_args(*arguments_owner));
 }
 
 std::string LuaThread::threadId() noexcept {

src/threading.h

@@ -2,8 +2,6 @@
 
 #include "shared-table.h"
 
-#include <sol.hpp>
-
 #include <iostream>
 #include <sstream>
 #include <thread>

src/utils.h

@@ -1,9 +1,29 @@
 #pragma once
 
 #include <iostream>
+#include <sstream>
+
+#include <sol.hpp>
+
+namespace utils {
+
+class ExceptionThrower
+{
+public:
+    void operator =(const std::ostream& os)
+    {
+        throw sol::error(static_cast<const std::stringstream&>(os).str());
+    }
+
+    operator bool()
+    {
+        return true;
+    }
+
+};
+
+}
+
+#define ERROR if (auto thr = utils::ExceptionThrower()) thr = std::stringstream() << __FILE__ << ":" << __LINE__ << std::endl
+#define ASSERT(cond) if (!(cond)) ERROR << "In condition '" << #cond << "': "
 
-#ifdef NDEBUG
-#    define ERROR if(false) std::cerr
-#else
-#    define ERROR std::cerr
-#endif