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/*************************************************************************/
/* native_extension_manager.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md). */
/* */
/* 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. */
/*************************************************************************/
#include "native_extension_manager.h"
#include "core/io/file_access.h"
NativeExtensionManager::LoadStatus NativeExtensionManager::load_extension(const String &p_path) {
if (native_extension_map.has(p_path)) {
return LOAD_STATUS_ALREADY_LOADED;
}
Ref<NativeExtension> extension = ResourceLoader::load(p_path);
if (extension.is_null()) {
return LOAD_STATUS_FAILED;
}
if (level >= 0) { //already initialized up to some level
int32_t minimum_level = extension->get_minimum_library_initialization_level();
if (minimum_level < MIN(level, NativeExtension::INITIALIZATION_LEVEL_SCENE)) {
return LOAD_STATUS_NEEDS_RESTART;
}
//initialize up to current level
for (int32_t i = minimum_level; i < level; i++) {
extension->initialize_library(NativeExtension::InitializationLevel(level));
}
}
native_extension_map[p_path] = extension;
return LOAD_STATUS_OK;
}
NativeExtensionManager::LoadStatus NativeExtensionManager::reload_extension(const String &p_path) {
return LOAD_STATUS_OK; //TODO
}
NativeExtensionManager::LoadStatus NativeExtensionManager::unload_extension(const String &p_path) {
if (!native_extension_map.has(p_path)) {
return LOAD_STATUS_NOT_LOADED;
}
Ref<NativeExtension> extension = native_extension_map[p_path];
if (level >= 0) { //already initialized up to some level
int32_t minimum_level = extension->get_minimum_library_initialization_level();
if (minimum_level < MIN(level, NativeExtension::INITIALIZATION_LEVEL_SCENE)) {
return LOAD_STATUS_NEEDS_RESTART;
}
//initialize up to current level
for (int32_t i = level; i >= minimum_level; i--) {
extension->deinitialize_library(NativeExtension::InitializationLevel(level));
}
}
native_extension_map.erase(p_path);
return LOAD_STATUS_OK;
}
bool NativeExtensionManager::is_extension_loaded(const String &p_path) const {
return native_extension_map.has(p_path);
}
Vector<String> NativeExtensionManager::get_loaded_extensions() const {
Vector<String> ret;
for (const Map<String, Ref<NativeExtension>>::Element *E = native_extension_map.front(); E; E = E->next()) {
ret.push_back(E->key());
}
return ret;
}
Ref<NativeExtension> NativeExtensionManager::get_extension(const String &p_path) {
Map<String, Ref<NativeExtension>>::Element *E = native_extension_map.find(p_path);
ERR_FAIL_COND_V(!E, Ref<NativeExtension>());
return E->get();
}
void NativeExtensionManager::initialize_extensions(NativeExtension::InitializationLevel p_level) {
ERR_FAIL_COND(int32_t(p_level) - 1 != level);
for (Map<String, Ref<NativeExtension>>::Element *E = native_extension_map.front(); E; E = E->next()) {
E->get()->initialize_library(p_level);
}
level = p_level;
}
void NativeExtensionManager::deinitialize_extensions(NativeExtension::InitializationLevel p_level) {
ERR_FAIL_COND(int32_t(p_level) != level);
for (Map<String, Ref<NativeExtension>>::Element *E = native_extension_map.front(); E; E = E->next()) {
E->get()->deinitialize_library(p_level);
}
level = int32_t(p_level) - 1;
}
void NativeExtensionManager::load_extensions() {
FileAccessRef f = FileAccess::open(NativeExtension::EXTENSION_LIST_CONFIG_FILE, FileAccess::READ);
while (f && !f->eof_reached()) {
String s = f->get_line().strip_edges();
if (s != String()) {
LoadStatus err = load_extension(s);
ERR_CONTINUE_MSG(err == LOAD_STATUS_FAILED, "Error loading extension: " + s);
}
}
}
NativeExtensionManager *NativeExtensionManager::get_singleton() {
return singleton;
}
void NativeExtensionManager::_bind_methods() {
ClassDB::bind_method(D_METHOD("load_extension", "path"), &NativeExtensionManager::load_extension);
ClassDB::bind_method(D_METHOD("reload_extension", "path"), &NativeExtensionManager::reload_extension);
ClassDB::bind_method(D_METHOD("unload_extension", "path"), &NativeExtensionManager::unload_extension);
ClassDB::bind_method(D_METHOD("is_extension_loaded", "path"), &NativeExtensionManager::is_extension_loaded);
ClassDB::bind_method(D_METHOD("get_loaded_extensions"), &NativeExtensionManager::get_loaded_extensions);
ClassDB::bind_method(D_METHOD("get_extension", "path"), &NativeExtensionManager::get_extension);
BIND_ENUM_CONSTANT(LOAD_STATUS_OK);
BIND_ENUM_CONSTANT(LOAD_STATUS_FAILED);
BIND_ENUM_CONSTANT(LOAD_STATUS_ALREADY_LOADED);
BIND_ENUM_CONSTANT(LOAD_STATUS_NOT_LOADED);
BIND_ENUM_CONSTANT(LOAD_STATUS_NEEDS_RESTART);
}
NativeExtensionManager *NativeExtensionManager::singleton = nullptr;
NativeExtensionManager::NativeExtensionManager() {
ERR_FAIL_COND(singleton != nullptr);
singleton = this;
}
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