virtualx-engine/modules/gdscript/gdscript_cache.cpp
Rémi Verschelde 5f9175f969
Merge pull request from Rindbee/return-null-on-fail-load-script
Returns null and does not cache when the source code of the script fails to load
2023-06-19 21:17:47 +02:00

454 lines
12 KiB
C++

/**************************************************************************/
/* gdscript_cache.cpp */
/**************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/**************************************************************************/
/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
/* */
/* 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 "gdscript_cache.h"
#include "gdscript.h"
#include "gdscript_analyzer.h"
#include "gdscript_compiler.h"
#include "gdscript_parser.h"
#include "core/io/file_access.h"
#include "core/templates/vector.h"
#include "scene/resources/packed_scene.h"
bool GDScriptParserRef::is_valid() const {
return parser != nullptr;
}
GDScriptParserRef::Status GDScriptParserRef::get_status() const {
return status;
}
GDScriptParser *GDScriptParserRef::get_parser() const {
return parser;
}
GDScriptAnalyzer *GDScriptParserRef::get_analyzer() {
if (analyzer == nullptr) {
analyzer = memnew(GDScriptAnalyzer(parser));
}
return analyzer;
}
Error GDScriptParserRef::raise_status(Status p_new_status) {
ERR_FAIL_COND_V(parser == nullptr, ERR_INVALID_DATA);
if (result != OK) {
return result;
}
while (p_new_status > status) {
switch (status) {
case EMPTY:
status = PARSED;
result = parser->parse(GDScriptCache::get_source_code(path), path, false);
break;
case PARSED: {
status = INHERITANCE_SOLVED;
Error inheritance_result = get_analyzer()->resolve_inheritance();
if (result == OK) {
result = inheritance_result;
}
} break;
case INHERITANCE_SOLVED: {
status = INTERFACE_SOLVED;
Error interface_result = get_analyzer()->resolve_interface();
if (result == OK) {
result = interface_result;
}
} break;
case INTERFACE_SOLVED: {
status = FULLY_SOLVED;
Error body_result = get_analyzer()->resolve_body();
if (result == OK) {
result = body_result;
}
} break;
case FULLY_SOLVED: {
return result;
}
}
if (result != OK) {
return result;
}
}
return result;
}
void GDScriptParserRef::clear() {
if (cleared) {
return;
}
cleared = true;
if (parser != nullptr) {
memdelete(parser);
}
if (analyzer != nullptr) {
memdelete(analyzer);
}
}
GDScriptParserRef::~GDScriptParserRef() {
clear();
MutexLock lock(GDScriptCache::singleton->mutex);
GDScriptCache::singleton->parser_map.erase(path);
}
GDScriptCache *GDScriptCache::singleton = nullptr;
void GDScriptCache::move_script(const String &p_from, const String &p_to) {
if (singleton == nullptr || p_from == p_to) {
return;
}
MutexLock lock(singleton->mutex);
if (singleton->cleared) {
return;
}
for (KeyValue<String, HashSet<String>> &E : singleton->packed_scene_dependencies) {
if (E.value.has(p_from)) {
E.value.insert(p_to);
E.value.erase(p_from);
}
}
if (singleton->parser_map.has(p_from) && !p_from.is_empty()) {
singleton->parser_map[p_to] = singleton->parser_map[p_from];
}
singleton->parser_map.erase(p_from);
if (singleton->shallow_gdscript_cache.has(p_from) && !p_from.is_empty()) {
singleton->shallow_gdscript_cache[p_to] = singleton->shallow_gdscript_cache[p_from];
}
singleton->shallow_gdscript_cache.erase(p_from);
if (singleton->full_gdscript_cache.has(p_from) && !p_from.is_empty()) {
singleton->full_gdscript_cache[p_to] = singleton->full_gdscript_cache[p_from];
}
singleton->full_gdscript_cache.erase(p_from);
}
void GDScriptCache::remove_script(const String &p_path) {
if (singleton == nullptr) {
return;
}
MutexLock lock(singleton->mutex);
if (singleton->cleared) {
return;
}
for (KeyValue<String, HashSet<String>> &E : singleton->packed_scene_dependencies) {
if (!E.value.has(p_path)) {
continue;
}
E.value.erase(p_path);
}
GDScriptCache::clear_unreferenced_packed_scenes();
if (singleton->parser_map.has(p_path)) {
singleton->parser_map[p_path]->clear();
singleton->parser_map.erase(p_path);
}
singleton->dependencies.erase(p_path);
singleton->shallow_gdscript_cache.erase(p_path);
singleton->full_gdscript_cache.erase(p_path);
}
Ref<GDScriptParserRef> GDScriptCache::get_parser(const String &p_path, GDScriptParserRef::Status p_status, Error &r_error, const String &p_owner) {
MutexLock lock(singleton->mutex);
Ref<GDScriptParserRef> ref;
if (!p_owner.is_empty()) {
singleton->dependencies[p_owner].insert(p_path);
}
if (singleton->parser_map.has(p_path)) {
ref = Ref<GDScriptParserRef>(singleton->parser_map[p_path]);
if (ref.is_null()) {
r_error = ERR_INVALID_DATA;
return ref;
}
} else {
if (!FileAccess::exists(p_path)) {
r_error = ERR_FILE_NOT_FOUND;
return ref;
}
GDScriptParser *parser = memnew(GDScriptParser);
ref.instantiate();
ref->parser = parser;
ref->path = p_path;
singleton->parser_map[p_path] = ref.ptr();
}
r_error = ref->raise_status(p_status);
return ref;
}
String GDScriptCache::get_source_code(const String &p_path) {
Vector<uint8_t> source_file;
Error err;
Ref<FileAccess> f = FileAccess::open(p_path, FileAccess::READ, &err);
ERR_FAIL_COND_V(err, "");
uint64_t len = f->get_length();
source_file.resize(len + 1);
uint64_t r = f->get_buffer(source_file.ptrw(), len);
ERR_FAIL_COND_V(r != len, "");
source_file.write[len] = 0;
String source;
if (source.parse_utf8((const char *)source_file.ptr()) != OK) {
ERR_FAIL_V_MSG("", "Script '" + p_path + "' contains invalid unicode (UTF-8), so it was not loaded. Please ensure that scripts are saved in valid UTF-8 unicode.");
}
return source;
}
Ref<GDScript> GDScriptCache::get_shallow_script(const String &p_path, Error &r_error, const String &p_owner) {
MutexLock lock(singleton->mutex);
if (!p_owner.is_empty()) {
singleton->dependencies[p_owner].insert(p_path);
}
if (singleton->full_gdscript_cache.has(p_path)) {
return singleton->full_gdscript_cache[p_path];
}
if (singleton->shallow_gdscript_cache.has(p_path)) {
return singleton->shallow_gdscript_cache[p_path];
}
Ref<GDScript> script;
script.instantiate();
script->set_path(p_path, true);
r_error = script->load_source_code(p_path);
if (r_error) {
return Ref<GDScript>(); // Returns null and does not cache when the script fails to load.
}
Ref<GDScriptParserRef> parser_ref = get_parser(p_path, GDScriptParserRef::PARSED, r_error);
if (r_error == OK) {
GDScriptCompiler::make_scripts(script.ptr(), parser_ref->get_parser()->get_tree(), true);
}
singleton->shallow_gdscript_cache[p_path] = script;
return script;
}
Ref<GDScript> GDScriptCache::get_full_script(const String &p_path, Error &r_error, const String &p_owner, bool p_update_from_disk) {
MutexLock lock(singleton->mutex);
if (!p_owner.is_empty()) {
singleton->dependencies[p_owner].insert(p_path);
}
Ref<GDScript> script;
r_error = OK;
if (singleton->full_gdscript_cache.has(p_path)) {
script = singleton->full_gdscript_cache[p_path];
if (!p_update_from_disk) {
return script;
}
}
if (script.is_null()) {
script = get_shallow_script(p_path, r_error);
if (r_error) {
return script;
}
}
if (p_update_from_disk) {
r_error = script->load_source_code(p_path);
}
if (r_error) {
return script;
}
singleton->full_gdscript_cache[p_path] = script;
singleton->shallow_gdscript_cache.erase(p_path);
script->reload(true);
return script;
}
Ref<GDScript> GDScriptCache::get_cached_script(const String &p_path) {
MutexLock lock(singleton->mutex);
if (singleton->full_gdscript_cache.has(p_path)) {
return singleton->full_gdscript_cache[p_path];
}
if (singleton->shallow_gdscript_cache.has(p_path)) {
return singleton->shallow_gdscript_cache[p_path];
}
return Ref<GDScript>();
}
Error GDScriptCache::finish_compiling(const String &p_owner) {
MutexLock lock(singleton->mutex);
// Mark this as compiled.
Ref<GDScript> script = get_cached_script(p_owner);
singleton->full_gdscript_cache[p_owner] = script;
singleton->shallow_gdscript_cache.erase(p_owner);
HashSet<String> depends = singleton->dependencies[p_owner];
Error err = OK;
for (const String &E : depends) {
Error this_err = OK;
// No need to save the script. We assume it's already referenced in the owner.
get_full_script(E, this_err);
if (this_err != OK) {
err = this_err;
}
}
singleton->dependencies.erase(p_owner);
return err;
}
void GDScriptCache::add_static_script(Ref<GDScript> p_script) {
ERR_FAIL_COND_MSG(p_script.is_null(), "Trying to cache empty script as static.");
ERR_FAIL_COND_MSG(!p_script->is_valid(), "Trying to cache non-compiled script as static.");
singleton->static_gdscript_cache[p_script->get_fully_qualified_name()] = p_script;
}
void GDScriptCache::remove_static_script(const String &p_fqcn) {
singleton->static_gdscript_cache.erase(p_fqcn);
}
Ref<PackedScene> GDScriptCache::get_packed_scene(const String &p_path, Error &r_error, const String &p_owner) {
MutexLock lock(singleton->mutex);
if (singleton->packed_scene_cache.has(p_path)) {
singleton->packed_scene_dependencies[p_path].insert(p_owner);
return singleton->packed_scene_cache[p_path];
}
Ref<PackedScene> scene = ResourceCache::get_ref(p_path);
if (scene.is_valid()) {
singleton->packed_scene_cache[p_path] = scene;
singleton->packed_scene_dependencies[p_path].insert(p_owner);
return scene;
}
scene.instantiate();
r_error = OK;
if (p_path.is_empty()) {
r_error = ERR_FILE_BAD_PATH;
return scene;
}
scene->set_path(p_path);
singleton->packed_scene_cache[p_path] = scene;
singleton->packed_scene_dependencies[p_path].insert(p_owner);
scene->reload_from_file();
return scene;
}
void GDScriptCache::clear_unreferenced_packed_scenes() {
if (singleton == nullptr) {
return;
}
MutexLock lock(singleton->mutex);
if (singleton->cleared) {
return;
}
for (KeyValue<String, HashSet<String>> &E : singleton->packed_scene_dependencies) {
if (E.value.size() > 0 || !ResourceLoader::is_imported(E.key)) {
continue;
}
singleton->packed_scene_dependencies.erase(E.key);
singleton->packed_scene_cache.erase(E.key);
}
}
void GDScriptCache::clear() {
if (singleton == nullptr) {
return;
}
MutexLock lock(singleton->mutex);
if (singleton->cleared) {
return;
}
singleton->cleared = true;
RBSet<Ref<GDScriptParserRef>> parser_map_refs;
for (KeyValue<String, GDScriptParserRef *> &E : singleton->parser_map) {
parser_map_refs.insert(E.value);
}
for (Ref<GDScriptParserRef> &E : parser_map_refs) {
if (E.is_valid())
E->clear();
}
singleton->packed_scene_dependencies.clear();
singleton->packed_scene_cache.clear();
parser_map_refs.clear();
singleton->parser_map.clear();
singleton->shallow_gdscript_cache.clear();
singleton->full_gdscript_cache.clear();
singleton->packed_scene_cache.clear();
singleton->packed_scene_dependencies.clear();
}
GDScriptCache::GDScriptCache() {
singleton = this;
}
GDScriptCache::~GDScriptCache() {
if (!cleared) {
clear();
}
singleton = nullptr;
}