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Goober5000andClaude Fable 5
9bf5b6acf4
w_bank: add a move constructor. object_copy_including_array_member returns by value, and without a move constructor the return fell back to the shallow copy constructor whenever NRVO was not applied (e.g. MSVC debug builds), after which the local's destructor deleted the freshly allocated arrays -- leaving the stored bank dangling and double-deleting at model unload. Also add noexcept to the move operations, replace the destructor call in move-assignment with explicit delete[]s (using an object after its lifetime has ended is undefined behavior), guard against self-move, and document that the defaulted copy constructor is intentionally shallow for object_copy_including_array_member's copy-then-replace pattern. LuaThread: declare the defaulted move operations noexcept. This exposed that LuaTable was not movable at all (its user-declared destructor suppressed the implicit moves), so LuaThread's implicit move spec was formally throwing -- a hard error on gcc 9, which still requires the spec on a defaulted redeclaration to match the implicit one. Restore LuaTable's rule of five and declare the LuaValue and LuaFunction copy operations noexcept (they only copy a shared_ptr, a raw pointer, and an enum), making the noexcept claims hold throughout the hierarchy. Co-Authored-By: Claude Fable 5 <[email protected]>
78 lines
1.6 KiB
C++
78 lines
1.6 KiB
C++
#pragma once
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#include "LuaConvert.h"
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#include "LuaTypes.h"
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#include "LuaValue.h"
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#include "LuaFunction.h"
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#include <iterator>
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namespace luacpp {
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/**
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* @brief Class to improve handling of lua threads (aka coroutines).
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*
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* This class provides a high-level interface to lua threads.
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*
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* @see LuaConvert
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*/
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class LuaThread : public LuaValue {
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LuaReference deleterUserdata;
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LuaTable deleterTable;
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LuaFunction deleterFunc;
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public:
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using ErrorCallback = std::function<bool(lua_State* mainState, lua_State* thread)>;
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struct ResumeState
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{
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bool completed = false;
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LuaValueList returnVals;
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};
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/**
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* @brief Creates a new empty thread.
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*/
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static LuaThread create(lua_State* L, const LuaFunction& func);
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/**
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* @brief Default constructor
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*/
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LuaThread();
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//Copying threads is VERY illegal
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LuaThread(const LuaThread&) = delete;
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LuaThread& operator=(const LuaThread&) = delete;
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LuaThread(LuaThread&&) noexcept;
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LuaThread& operator=(LuaThread&&) noexcept;
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~LuaThread() override;
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/**
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* @brief Sets a new reference.
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* This overload checks if the passed reference is a thread
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*
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* @param ref The new reference
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* @return void
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*/
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void setReference(const LuaReference& ref) override;
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void setErrorCallback(ErrorCallback errorCallback);
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ResumeState resume(const LuaValueList& params) const;
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lua_State* getThreadHandle() const;
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private:
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LuaThread(lua_State* luaState, lua_State* threadHandle);
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lua_State* _thread = nullptr;
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ErrorCallback _errorCallback;
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};
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namespace convert {
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bool popValue(lua_State* luaState, LuaThread& target, int stackposition = -1, bool remove = true);
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}
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} // namespace luacpp
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