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sol2/include/sol/state_view.hpp
Rinat Namazov f5355395b7 Added FFI enabled check
2021-05-15 21:58:51 -04:00

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// sol2
// The MIT License (MIT)
// Copyright (c) 2013-2021 Rapptz, ThePhD and contributors
// Permission is hereby granted, free of charge, to any person obtaining a copy of
// this software and associated documentation files (the "Software"), to deal in
// the Software without restriction, including without limitation the rights to
// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
// the Software, and to permit persons to whom the Software is furnished to do so,
// subject to the following conditions:
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
// FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
// COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
// IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
// CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
#ifndef SOL_STATE_VIEW_HPP
#define SOL_STATE_VIEW_HPP
#include <sol/error.hpp>
#include <sol/table.hpp>
#include <sol/environment.hpp>
#include <sol/load_result.hpp>
#include <sol/state_handling.hpp>
#include <memory>
#include <cstddef>
namespace sol {
class state_view {
private:
lua_State* L;
table reg;
global_table global;
optional<object> is_loaded_package(const std::string& key) {
auto loaded = reg.traverse_get<optional<object>>("_LOADED", key);
bool is53mod = loaded && !(loaded->is<bool>() && !loaded->as<bool>());
if (is53mod)
return loaded;
#if SOL_LUA_VERSION_I_ <= 501
auto loaded51 = global.traverse_get<optional<object>>("package", "loaded", key);
bool is51mod = loaded51 && !(loaded51->is<bool>() && !loaded51->as<bool>());
if (is51mod)
return loaded51;
#endif
return nullopt;
}
template <typename T>
void ensure_package(const std::string& key, T&& sr) {
#if SOL_LUA_VERSION_I_ <= 501
auto pkg = global["package"];
if (!pkg.valid()) {
pkg = create_table_with("loaded", create_table_with(key, sr));
}
else {
auto ld = pkg["loaded"];
if (!ld.valid()) {
ld = create_table_with(key, sr);
}
else {
ld[key] = sr;
}
}
#endif
auto loaded = reg["_LOADED"];
if (!loaded.valid()) {
loaded = create_table_with(key, sr);
}
else {
loaded[key] = sr;
}
}
template <typename Fx>
object require_core(const std::string& key, Fx&& action, bool create_global = true) {
optional<object> loaded = is_loaded_package(key);
if (loaded && loaded->valid())
return std::move(*loaded);
int before = lua_gettop(L);
action();
int after = lua_gettop(L);
if (before == after) {
// I mean, you were supposed to return
// something, ANYTHING, from your requires script. I guess I'll just
// but some trash in here, it's on you after that?
ensure_package(key, static_cast<void*>(L));
return object(L, lua_nil);
}
stack_reference sr(L, -1);
if (create_global)
set(key, sr);
ensure_package(key, sr);
return stack::pop<object>(L);
}
public:
using iterator = typename global_table::iterator;
using const_iterator = typename global_table::const_iterator;
state_view(lua_State* Ls) : L(Ls), reg(Ls, LUA_REGISTRYINDEX), global(Ls, global_tag) {
}
state_view(this_state Ls) : state_view(Ls.L) {
}
lua_State* lua_state() const {
return L;
}
template <typename... Args>
void open_libraries(Args&&... args) {
static_assert(meta::all_same<lib, meta::unqualified_t<Args>...>::value, "all types must be libraries");
if constexpr (sizeof...(args) == 0) {
luaL_openlibs(L);
return;
}
else {
lib libraries[1 + sizeof...(args)] = { lib::count, std::forward<Args>(args)... };
for (auto&& library : libraries) {
switch (library) {
#if SOL_LUA_VERSION_I_ <= 501 && SOL_IS_ON(SOL_USE_LUAJIT_I_)
case lib::coroutine:
#endif // luajit opens coroutine base stuff
case lib::base:
luaL_requiref(L, "base", luaopen_base, 1);
lua_pop(L, 1);
break;
case lib::package:
luaL_requiref(L, "package", luaopen_package, 1);
lua_pop(L, 1);
break;
#if SOL_IS_OFF(SOL_USE_LUAJIT_I_)
case lib::coroutine:
#if SOL_LUA_VERSION_I_ > 501
luaL_requiref(L, "coroutine", luaopen_coroutine, 1);
lua_pop(L, 1);
#endif // Lua 5.2+ only
break;
#endif // Not LuaJIT - comes builtin
case lib::string:
luaL_requiref(L, "string", luaopen_string, 1);
lua_pop(L, 1);
break;
case lib::table:
luaL_requiref(L, "table", luaopen_table, 1);
lua_pop(L, 1);
break;
case lib::math:
luaL_requiref(L, "math", luaopen_math, 1);
lua_pop(L, 1);
break;
case lib::bit32:
#if SOL_IS_ON(SOL_USE_LUAJIT_I_)
luaL_requiref(L, "bit32", luaopen_bit, 1);
lua_pop(L, 1);
#elif SOL_IS_ON(SOL_LUA_BIT32_LIB_I_)
luaL_requiref(L, "bit32", luaopen_bit32, 1);
lua_pop(L, 1);
#else
#endif
break;
case lib::io:
luaL_requiref(L, "io", luaopen_io, 1);
lua_pop(L, 1);
break;
case lib::os:
luaL_requiref(L, "os", luaopen_os, 1);
lua_pop(L, 1);
break;
case lib::debug:
luaL_requiref(L, "debug", luaopen_debug, 1);
lua_pop(L, 1);
break;
case lib::utf8:
#if SOL_LUA_VERSION_I_ > 502 && SOL_IS_OFF(SOL_USE_LUAJIT_I_)
luaL_requiref(L, "utf8", luaopen_utf8, 1);
lua_pop(L, 1);
#endif // Lua 5.3+ only
break;
case lib::ffi:
#if SOL_IS_ON(SOL_USE_LUAJIT_I_) && SOL_IS_OFF(SOL_LUAJIT_FFI_DISABLED_I_)
luaL_requiref(L, "ffi", luaopen_ffi, 1);
lua_pop(L, 1);
#endif // LuaJIT only
break;
case lib::jit:
#if SOL_IS_ON(SOL_USE_LUAJIT_I_)
luaL_requiref(L, "jit", luaopen_jit, 0);
lua_pop(L, 1);
#endif // LuaJIT Only
break;
case lib::count:
default:
break;
}
}
}
}
object require(const std::string& key, lua_CFunction open_function, bool create_global = true) {
luaL_requiref(L, key.c_str(), open_function, create_global ? 1 : 0);
return stack::pop<object>(L);
}
object require_script(const std::string& key, const string_view& code, bool create_global = true,
const std::string& chunkname = detail::default_chunk_name(), load_mode mode = load_mode::any) {
auto action = [this, &code, &chunkname, &mode]() { stack::script(L, code, chunkname, mode); };
return require_core(key, action, create_global);
}
object require_file(const std::string& key, const std::string& filename, bool create_global = true, load_mode mode = load_mode::any) {
auto action = [this, &filename, &mode]() { stack::script_file(L, filename, mode); };
return require_core(key, action, create_global);
}
void clear_package_loaders() {
optional<table> maybe_package = this->global["package"];
if (!maybe_package) {
// package lib wasn't opened
// open package lib
return;
}
table& package = *maybe_package;
// yay for version differences...
// one day Lua 5.1 will die a peaceful death
// and its old bones will find blissful rest
auto loaders_proxy = package
#if SOL_LUA_VERSION_I_ < 502
["loaders"]
#else
["searchers"]
#endif
;
if (!loaders_proxy.valid()) {
// nothing to clear
return;
}
// we need to create the table for loaders
// table does not exist, so create and move forward
loaders_proxy = new_table(1, 0);
}
template <typename Fx>
void add_package_loader(Fx&& fx, bool clear_all_package_loaders = false) {
optional<table> maybe_package = this->global["package"];
if (!maybe_package) {
// package lib wasn't opened
// open package lib
return;
}
table& package = *maybe_package;
// yay for version differences...
// one day Lua 5.1 will die a peaceful death
// and its old bones will find blissful rest
auto loaders_proxy = package
#if SOL_LUA_VERSION_I_ < 502
["loaders"]
#else
["searchers"]
#endif
;
bool make_new_table = clear_all_package_loaders || !loaders_proxy.valid();
if (make_new_table) {
// we need to create the table for loaders
// table does not exist, so create and move forward
loaders_proxy = new_table(1, 0);
}
optional<table> maybe_loaders = loaders_proxy;
if (!maybe_loaders) {
// loaders/searches
// thing exists in package, but it
// ain't a table or a table-alike...!
return;
}
table loaders = loaders_proxy;
loaders.add(std::forward<Fx>(fx));
}
template <typename E>
protected_function_result do_reader(lua_Reader reader, void* data, const basic_environment<E>& env,
const std::string& chunkname = detail::default_chunk_name(), load_mode mode = load_mode::any) {
detail::typical_chunk_name_t basechunkname = {};
const char* chunknametarget = detail::make_chunk_name("lua_Reader", chunkname, basechunkname);
load_status x = static_cast<load_status>(lua_load(L, reader, data, chunknametarget, to_string(mode).c_str()));
if (x != load_status::ok) {
return protected_function_result(L, absolute_index(L, -1), 0, 1, static_cast<call_status>(x));
}
stack_aligned_protected_function pf(L, -1);
set_environment(env, pf);
return pf();
}
protected_function_result do_reader(
lua_Reader reader, void* data, const std::string& chunkname = detail::default_chunk_name(), load_mode mode = load_mode::any) {
detail::typical_chunk_name_t basechunkname = {};
const char* chunknametarget = detail::make_chunk_name("lua_Reader", chunkname, basechunkname);
load_status x = static_cast<load_status>(lua_load(L, reader, data, chunknametarget, to_string(mode).c_str()));
if (x != load_status::ok) {
return protected_function_result(L, absolute_index(L, -1), 0, 1, static_cast<call_status>(x));
}
stack_aligned_protected_function pf(L, -1);
return pf();
}
template <typename E>
protected_function_result do_string(const string_view& code, const basic_environment<E>& env,
const std::string& chunkname = detail::default_chunk_name(), load_mode mode = load_mode::any) {
detail::typical_chunk_name_t basechunkname = {};
const char* chunknametarget = detail::make_chunk_name(code, chunkname, basechunkname);
load_status x = static_cast<load_status>(luaL_loadbufferx(L, code.data(), code.size(), chunknametarget, to_string(mode).c_str()));
if (x != load_status::ok) {
return protected_function_result(L, absolute_index(L, -1), 0, 1, static_cast<call_status>(x));
}
stack_aligned_protected_function pf(L, -1);
set_environment(env, pf);
return pf();
}
protected_function_result do_string(
const string_view& code, const std::string& chunkname = detail::default_chunk_name(), load_mode mode = load_mode::any) {
detail::typical_chunk_name_t basechunkname = {};
const char* chunknametarget = detail::make_chunk_name(code, chunkname, basechunkname);
load_status x = static_cast<load_status>(luaL_loadbufferx(L, code.data(), code.size(), chunknametarget, to_string(mode).c_str()));
if (x != load_status::ok) {
return protected_function_result(L, absolute_index(L, -1), 0, 1, static_cast<call_status>(x));
}
stack_aligned_protected_function pf(L, -1);
return pf();
}
template <typename E>
protected_function_result do_file(const std::string& filename, const basic_environment<E>& env, load_mode mode = load_mode::any) {
load_status x = static_cast<load_status>(luaL_loadfilex(L, filename.c_str(), to_string(mode).c_str()));
if (x != load_status::ok) {
return protected_function_result(L, absolute_index(L, -1), 0, 1, static_cast<call_status>(x));
}
stack_aligned_protected_function pf(L, -1);
set_environment(env, pf);
return pf();
}
protected_function_result do_file(const std::string& filename, load_mode mode = load_mode::any) {
load_status x = static_cast<load_status>(luaL_loadfilex(L, filename.c_str(), to_string(mode).c_str()));
if (x != load_status::ok) {
return protected_function_result(L, absolute_index(L, -1), 0, 1, static_cast<call_status>(x));
}
stack_aligned_protected_function pf(L, -1);
return pf();
}
template <typename Fx,
meta::disable_any<meta::is_string_constructible<meta::unqualified_t<Fx>>,
meta::is_specialization_of<meta::unqualified_t<Fx>, basic_environment>> = meta::enabler>
protected_function_result safe_script(
lua_Reader reader, void* data, Fx&& on_error, const std::string& chunkname = detail::default_chunk_name(), load_mode mode = load_mode::any) {
protected_function_result pfr = do_reader(reader, data, chunkname, mode);
if (!pfr.valid()) {
return on_error(L, std::move(pfr));
}
return pfr;
}
protected_function_result safe_script(
lua_Reader reader, void* data, const std::string& chunkname = detail::default_chunk_name(), load_mode mode = load_mode::any) {
return safe_script(reader, data, script_default_on_error, chunkname, mode);
}
template <typename Fx,
meta::disable_any<meta::is_string_constructible<meta::unqualified_t<Fx>>,
meta::is_specialization_of<meta::unqualified_t<Fx>, basic_environment>> = meta::enabler>
protected_function_result safe_script(
const string_view& code, Fx&& on_error, const std::string& chunkname = detail::default_chunk_name(), load_mode mode = load_mode::any) {
protected_function_result pfr = do_string(code, chunkname, mode);
if (!pfr.valid()) {
return on_error(L, std::move(pfr));
}
return pfr;
}
template <typename Fx, typename E>
protected_function_result safe_script(const string_view& code, const basic_environment<E>& env, Fx&& on_error,
const std::string& chunkname = detail::default_chunk_name(), load_mode mode = load_mode::any) {
protected_function_result pfr = do_string(code, env, chunkname, mode);
if (!pfr.valid()) {
return on_error(L, std::move(pfr));
}
return pfr;
}
template <typename E>
protected_function_result safe_script(const string_view& code, const basic_environment<E>& env,
const std::string& chunkname = detail::default_chunk_name(), load_mode mode = load_mode::any) {
return safe_script(code, env, script_default_on_error, chunkname, mode);
}
protected_function_result safe_script(
const string_view& code, const std::string& chunkname = detail::default_chunk_name(), load_mode mode = load_mode::any) {
return safe_script(code, script_default_on_error, chunkname, mode);
}
template <typename Fx,
meta::disable_any<meta::is_string_constructible<meta::unqualified_t<Fx>>,
meta::is_specialization_of<meta::unqualified_t<Fx>, basic_environment>> = meta::enabler>
protected_function_result safe_script_file(const std::string& filename, Fx&& on_error, load_mode mode = load_mode::any) {
protected_function_result pfr = do_file(filename, mode);
if (!pfr.valid()) {
return on_error(L, std::move(pfr));
}
return pfr;
}
template <typename Fx, typename E>
protected_function_result safe_script_file(
const std::string& filename, const basic_environment<E>& env, Fx&& on_error, load_mode mode = load_mode::any) {
protected_function_result pfr = do_file(filename, env, mode);
if (!pfr.valid()) {
return on_error(L, std::move(pfr));
}
return pfr;
}
template <typename E>
protected_function_result safe_script_file(const std::string& filename, const basic_environment<E>& env, load_mode mode = load_mode::any) {
return safe_script_file(filename, env, script_default_on_error, mode);
}
protected_function_result safe_script_file(const std::string& filename, load_mode mode = load_mode::any) {
return safe_script_file(filename, script_default_on_error, mode);
}
template <typename E>
unsafe_function_result unsafe_script(lua_Reader reader, void* data, const basic_environment<E>& env,
const std::string& chunkname = detail::default_chunk_name(), load_mode mode = load_mode::any) {
detail::typical_chunk_name_t basechunkname = {};
const char* chunknametarget = detail::make_chunk_name("lua_Reader", chunkname, basechunkname);
int index = lua_gettop(L);
if (lua_load(L, reader, data, chunknametarget, to_string(mode).c_str())) {
lua_error(L);
}
set_environment(env, stack_reference(L, raw_index(index + 1)));
if (lua_pcall(L, 0, LUA_MULTRET, 0)) {
lua_error(L);
}
int postindex = lua_gettop(L);
int returns = postindex - index;
return unsafe_function_result(L, (std::max)(postindex - (returns - 1), 1), returns);
}
unsafe_function_result unsafe_script(
lua_Reader reader, void* data, const std::string& chunkname = detail::default_chunk_name(), load_mode mode = load_mode::any) {
int index = lua_gettop(L);
stack::script(L, reader, data, chunkname, mode);
int postindex = lua_gettop(L);
int returns = postindex - index;
return unsafe_function_result(L, (std::max)(postindex - (returns - 1), 1), returns);
}
template <typename E>
unsafe_function_result unsafe_script(const string_view& code, const basic_environment<E>& env,
const std::string& chunkname = detail::default_chunk_name(), load_mode mode = load_mode::any) {
detail::typical_chunk_name_t basechunkname = {};
const char* chunknametarget = detail::make_chunk_name(code, chunkname, basechunkname);
int index = lua_gettop(L);
if (luaL_loadbufferx(L, code.data(), code.size(), chunknametarget, to_string(mode).c_str())) {
lua_error(L);
}
set_environment(env, stack_reference(L, raw_index(index + 1)));
if (lua_pcall(L, 0, LUA_MULTRET, 0)) {
lua_error(L);
}
int postindex = lua_gettop(L);
int returns = postindex - index;
return unsafe_function_result(L, (std::max)(postindex - (returns - 1), 1), returns);
}
unsafe_function_result unsafe_script(
const string_view& code, const std::string& chunkname = detail::default_chunk_name(), load_mode mode = load_mode::any) {
int index = lua_gettop(L);
stack::script(L, code, chunkname, mode);
int postindex = lua_gettop(L);
int returns = postindex - index;
return unsafe_function_result(L, (std::max)(postindex - (returns - 1), 1), returns);
}
template <typename E>
unsafe_function_result unsafe_script_file(const std::string& filename, const basic_environment<E>& env, load_mode mode = load_mode::any) {
int index = lua_gettop(L);
if (luaL_loadfilex(L, filename.c_str(), to_string(mode).c_str())) {
lua_error(L);
}
set_environment(env, stack_reference(L, raw_index(index + 1)));
if (lua_pcall(L, 0, LUA_MULTRET, 0)) {
lua_error(L);
}
int postindex = lua_gettop(L);
int returns = postindex - index;
return unsafe_function_result(L, (std::max)(postindex - (returns - 1), 1), returns);
}
unsafe_function_result unsafe_script_file(const std::string& filename, load_mode mode = load_mode::any) {
int index = lua_gettop(L);
stack::script_file(L, filename, mode);
int postindex = lua_gettop(L);
int returns = postindex - index;
return unsafe_function_result(L, (std::max)(postindex - (returns - 1), 1), returns);
}
template <typename Fx,
meta::disable_any<meta::is_string_constructible<meta::unqualified_t<Fx>>,
meta::is_specialization_of<meta::unqualified_t<Fx>, basic_environment>> = meta::enabler>
protected_function_result script(
const string_view& code, Fx&& on_error, const std::string& chunkname = detail::default_chunk_name(), load_mode mode = load_mode::any) {
return safe_script(code, std::forward<Fx>(on_error), chunkname, mode);
}
template <typename Fx,
meta::disable_any<meta::is_string_constructible<meta::unqualified_t<Fx>>,
meta::is_specialization_of<meta::unqualified_t<Fx>, basic_environment>> = meta::enabler>
protected_function_result script_file(const std::string& filename, Fx&& on_error, load_mode mode = load_mode::any) {
return safe_script_file(filename, std::forward<Fx>(on_error), mode);
}
template <typename Fx, typename E>
protected_function_result script(const string_view& code, const basic_environment<E>& env, Fx&& on_error,
const std::string& chunkname = detail::default_chunk_name(), load_mode mode = load_mode::any) {
return safe_script(code, env, std::forward<Fx>(on_error), chunkname, mode);
}
template <typename Fx, typename E>
protected_function_result script_file(const std::string& filename, const basic_environment<E>& env, Fx&& on_error, load_mode mode = load_mode::any) {
return safe_script_file(filename, env, std::forward<Fx>(on_error), mode);
}
protected_function_result script(
const string_view& code, const environment& env, const std::string& chunkname = detail::default_chunk_name(), load_mode mode = load_mode::any) {
return safe_script(code, env, script_default_on_error, chunkname, mode);
}
protected_function_result script_file(const std::string& filename, const environment& env, load_mode mode = load_mode::any) {
return safe_script_file(filename, env, script_default_on_error, mode);
}
#if SOL_IS_ON(SOL_SAFE_FUNCTION_OBJECTS_I_)
protected_function_result script(
lua_Reader reader, void* data, const std::string& chunkname = detail::default_chunk_name(), load_mode mode = load_mode::any) {
return safe_script(reader, data, chunkname, mode);
}
protected_function_result script(
const string_view& code, const std::string& chunkname = detail::default_chunk_name(), load_mode mode = load_mode::any) {
return safe_script(code, chunkname, mode);
}
protected_function_result script_file(const std::string& filename, load_mode mode = load_mode::any) {
return safe_script_file(filename, mode);
}
#else
unsafe_function_result script(const string_view& code, const std::string& chunkname = detail::default_chunk_name(), load_mode mode = load_mode::any) {
return unsafe_script(code, chunkname, mode);
}
unsafe_function_result script_file(const std::string& filename, load_mode mode = load_mode::any) {
return unsafe_script_file(filename, mode);
}
#endif
load_result load(const string_view& code, const std::string& chunkname = detail::default_chunk_name(), load_mode mode = load_mode::any) {
detail::typical_chunk_name_t basechunkname = {};
const char* chunknametarget = detail::make_chunk_name(code, chunkname, basechunkname);
load_status x = static_cast<load_status>(luaL_loadbufferx(L, code.data(), code.size(), chunknametarget, to_string(mode).c_str()));
return load_result(L, absolute_index(L, -1), 1, 1, x);
}
load_result load_buffer(const char* buff, size_t size, const std::string& chunkname = detail::default_chunk_name(), load_mode mode = load_mode::any) {
return load(string_view(buff, size), chunkname, mode);
}
load_result load_buffer(
const std::byte* buff, size_t size, const std::string& chunkname = detail::default_chunk_name(), load_mode mode = load_mode::any) {
return load(string_view(reinterpret_cast<const char*>(buff), size), chunkname, mode);
}
load_result load_file(const std::string& filename, load_mode mode = load_mode::any) {
load_status x = static_cast<load_status>(luaL_loadfilex(L, filename.c_str(), to_string(mode).c_str()));
return load_result(L, absolute_index(L, -1), 1, 1, x);
}
load_result load(lua_Reader reader, void* data, const std::string& chunkname = detail::default_chunk_name(), load_mode mode = load_mode::any) {
detail::typical_chunk_name_t basechunkname = {};
const char* chunknametarget = detail::make_chunk_name("lua_Reader", chunkname, basechunkname);
load_status x = static_cast<load_status>(lua_load(L, reader, data, chunknametarget, to_string(mode).c_str()));
return load_result(L, absolute_index(L, -1), 1, 1, x);
}
iterator begin() const {
return global.begin();
}
iterator end() const {
return global.end();
}
const_iterator cbegin() const {
return global.cbegin();
}
const_iterator cend() const {
return global.cend();
}
global_table globals() const {
// if we return a reference
// we'll be screwed a bit
return global;
}
global_table& globals() {
return global;
}
table registry() const {
return reg;
}
std::size_t memory_used() const {
return total_memory_used(lua_state());
}
int stack_top() const {
return stack::top(L);
}
int stack_clear() {
int s = stack_top();
lua_pop(L, s);
return s;
}
bool supports_gc_mode(gc_mode mode) const noexcept {
#if SOL_LUA_VERSION_I_ >= 504
// supports all modes
(void)mode;
return true;
#endif
return mode == gc_mode::default_value;
}
bool is_gc_on() const {
#if SOL_LUA_VERSION_I_ >= 502
return lua_gc(lua_state(), LUA_GCISRUNNING, 0) == 1;
#else
// You cannot turn it off in Lua 5.1
return true;
#endif
}
void collect_garbage() {
lua_gc(lua_state(), LUA_GCCOLLECT, 0);
}
void collect_gc() {
collect_garbage();
}
bool step_gc(int step_size_kilobytes) {
// THOUGHT: std::chrono-alikes to map "kilobyte size" here...?
// Make it harder to give MB or KB to a B parameter...?
// Probably overkill for now.
#if SOL_LUA_VERSION_I_ >= 504
// The manual implies that this function is almost always successful...
// is it?? It could depend on the GC mode...
return lua_gc(lua_state(), LUA_GCSTEP, step_size_kilobytes) != 0;
#else
return lua_gc(lua_state(), LUA_GCSTEP, step_size_kilobytes) == 1;
#endif
}
void restart_gc() {
lua_gc(lua_state(), LUA_GCRESTART, 0);
}
void stop_gc() {
lua_gc(lua_state(), LUA_GCSTOP, 0);
}
// Returns the old GC mode. Check support using the supports_gc_mode function.
gc_mode change_gc_mode_incremental(int pause, int step_multiplier, int step_byte_size) {
// "What the fuck does any of this mean??"
// http://www.lua.org/manual/5.4/manual.html#2.5.1
// THOUGHT: std::chrono-alikes to map "byte size" here...?
// Make it harder to give MB or KB to a B parameter...?
// Probably overkill for now.
#if SOL_LUA_VERSION_I_ >= 504
int old_mode = lua_gc(lua_state(), LUA_GCINC, pause, step_multiplier, step_byte_size);
if (old_mode == LUA_GCGEN) {
return gc_mode::generational;
}
else if (old_mode == LUA_GCINC) {
return gc_mode::incremental;
}
#else
lua_gc(lua_state(), LUA_GCSETPAUSE, pause);
lua_gc(lua_state(), LUA_GCSETSTEPMUL, step_multiplier);
(void)step_byte_size; // means nothing in older versions
#endif
return gc_mode::default_value;
}
// Returns the old GC mode. Check support using the supports_gc_mode function.
gc_mode change_gc_mode_generational(int minor_multiplier, int major_multiplier) {
#if SOL_LUA_VERSION_I_ >= 504
// "What does this shit mean?"
// http://www.lua.org/manual/5.4/manual.html#2.5.2
int old_mode = lua_gc(lua_state(), LUA_GCGEN, minor_multiplier, major_multiplier);
if (old_mode == LUA_GCGEN) {
return gc_mode::generational;
}
else if (old_mode == LUA_GCINC) {
return gc_mode::incremental;
}
#else
(void)minor_multiplier;
(void)major_multiplier;
#endif
return gc_mode::default_value;
}
operator lua_State*() const {
return lua_state();
}
void set_panic(lua_CFunction panic) {
lua_atpanic(lua_state(), panic);
}
void set_exception_handler(exception_handler_function handler) {
set_default_exception_handler(lua_state(), handler);
}
template <typename... Args, typename... Keys>
decltype(auto) get(Keys&&... keys) const {
return global.get<Args...>(std::forward<Keys>(keys)...);
}
template <typename T, typename Key>
decltype(auto) get_or(Key&& key, T&& otherwise) const {
return global.get_or(std::forward<Key>(key), std::forward<T>(otherwise));
}
template <typename T, typename Key, typename D>
decltype(auto) get_or(Key&& key, D&& otherwise) const {
return global.get_or<T>(std::forward<Key>(key), std::forward<D>(otherwise));
}
template <typename... Args>
state_view& set(Args&&... args) {
global.set(std::forward<Args>(args)...);
return *this;
}
template <typename T, typename... Keys>
decltype(auto) traverse_get(Keys&&... keys) const {
return global.traverse_get<T>(std::forward<Keys>(keys)...);
}
template <typename... Args>
state_view& traverse_set(Args&&... args) {
global.traverse_set(std::forward<Args>(args)...);
return *this;
}
template <typename Class, typename... Args>
usertype<Class> new_usertype(Args&&... args) {
return global.new_usertype<Class>(std::forward<Args>(args)...);
}
template <bool read_only = true, typename... Args>
state_view& new_enum(const string_view& name, Args&&... args) {
global.new_enum<read_only>(name, std::forward<Args>(args)...);
return *this;
}
template <typename T, bool read_only = true>
state_view& new_enum(const string_view& name, std::initializer_list<std::pair<string_view, T>> items) {
global.new_enum<T, read_only>(name, std::move(items));
return *this;
}
template <typename Fx>
void for_each(Fx&& fx) {
global.for_each(std::forward<Fx>(fx));
}
template <typename T>
table_proxy<global_table&, detail::proxy_key_t<T>> operator[](T&& key) {
return global[std::forward<T>(key)];
}
template <typename T>
table_proxy<const global_table&, detail::proxy_key_t<T>> operator[](T&& key) const {
return global[std::forward<T>(key)];
}
template <typename Sig, typename... Args, typename Key>
state_view& set_function(Key&& key, Args&&... args) {
global.set_function<Sig>(std::forward<Key>(key), std::forward<Args>(args)...);
return *this;
}
template <typename... Args, typename Key>
state_view& set_function(Key&& key, Args&&... args) {
global.set_function(std::forward<Key>(key), std::forward<Args>(args)...);
return *this;
}
template <typename Name>
table create_table(Name&& name, int narr = 0, int nrec = 0) {
return global.create(std::forward<Name>(name), narr, nrec);
}
template <typename Name, typename Key, typename Value, typename... Args>
table create_table(Name&& name, int narr, int nrec, Key&& key, Value&& value, Args&&... args) {
return global.create(std::forward<Name>(name), narr, nrec, std::forward<Key>(key), std::forward<Value>(value), std::forward<Args>(args)...);
}
template <typename Name, typename... Args>
table create_named_table(Name&& name, Args&&... args) {
table x = global.create_with(std::forward<Args>(args)...);
global.set(std::forward<Name>(name), x);
return x;
}
table create_table(int narr = 0, int nrec = 0) {
return create_table(lua_state(), narr, nrec);
}
template <typename Key, typename Value, typename... Args>
table create_table(int narr, int nrec, Key&& key, Value&& value, Args&&... args) {
return create_table(lua_state(), narr, nrec, std::forward<Key>(key), std::forward<Value>(value), std::forward<Args>(args)...);
}
template <typename... Args>
table create_table_with(Args&&... args) {
return create_table_with(lua_state(), std::forward<Args>(args)...);
}
static inline table create_table(lua_State* L, int narr = 0, int nrec = 0) {
return global_table::create(L, narr, nrec);
}
template <typename Key, typename Value, typename... Args>
static inline table create_table(lua_State* L, int narr, int nrec, Key&& key, Value&& value, Args&&... args) {
return global_table::create(L, narr, nrec, std::forward<Key>(key), std::forward<Value>(value), std::forward<Args>(args)...);
}
template <typename... Args>
static inline table create_table_with(lua_State* L, Args&&... args) {
return global_table::create_with(L, std::forward<Args>(args)...);
}
};
} // namespace sol
#endif // SOL_STATE_VIEW_HPP
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