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Update obj.h

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This commit is contained in:
blueloveTH 2023-05-23 19:45:10 +08:00
parent afb2442712
commit 9257d18a75
1 changed files with 4 additions and 1 deletions
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src/obj.h
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@ -26,11 +26,14 @@ struct NativeFunc {
using UserData = char[32]; using UserData = char[32];
UserData _userdata; UserData _userdata;
bool _has_userdata;
template <typename T> template <typename T>
void set_userdata(T data) { void set_userdata(T data) {
static_assert(std::is_trivially_copyable_v<T>); static_assert(std::is_trivially_copyable_v<T>);
static_assert(sizeof(T) <= sizeof(UserData)); static_assert(sizeof(T) <= sizeof(UserData));
if(_has_userdata) throw std::runtime_error("userdata already set");
_has_userdata = true;
memcpy(_userdata, &data, sizeof(T)); memcpy(_userdata, &data, sizeof(T));
} }
@ -41,7 +44,7 @@ struct NativeFunc {
return reinterpret_cast<const T&>(_userdata); return reinterpret_cast<const T&>(_userdata);
} }
NativeFunc(NativeFuncC f, int argc, bool method) : f(f), argc(argc), method(method), _lua_f(nullptr) {} NativeFunc(NativeFuncC f, int argc, bool method) : f(f), argc(argc), method(method), _has_userdata(false) {}
PyObject* operator()(VM* vm, ArgsView args) const; PyObject* operator()(VM* vm, ArgsView args) const;
}; };