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310 lines
14 KiB
C++
310 lines
14 KiB
C++
/**************************************************************************/
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/* resource_loader.h */
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/**************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/**************************************************************************/
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/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
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/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/**************************************************************************/
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#ifndef RESOURCE_LOADER_H
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#define RESOURCE_LOADER_H
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#include "core/io/resource.h"
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#include "core/object/gdvirtual.gen.inc"
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#include "core/object/worker_thread_pool.h"
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#include "core/os/semaphore.h"
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#include "core/os/thread.h"
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class ConditionVariable;
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template <int Tag>
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class SafeBinaryMutex;
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class ResourceFormatLoader : public RefCounted {
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GDCLASS(ResourceFormatLoader, RefCounted);
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public:
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enum CacheMode {
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CACHE_MODE_IGNORE,
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CACHE_MODE_REUSE,
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CACHE_MODE_REPLACE,
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CACHE_MODE_IGNORE_DEEP,
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CACHE_MODE_REPLACE_DEEP,
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};
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protected:
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static void _bind_methods();
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GDVIRTUAL0RC(Vector<String>, _get_recognized_extensions)
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GDVIRTUAL2RC(bool, _recognize_path, String, StringName)
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GDVIRTUAL1RC(bool, _handles_type, StringName)
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GDVIRTUAL1RC(String, _get_resource_type, String)
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GDVIRTUAL1RC(String, _get_resource_script_class, String)
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GDVIRTUAL1RC(ResourceUID::ID, _get_resource_uid, String)
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GDVIRTUAL2RC(Vector<String>, _get_dependencies, String, bool)
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GDVIRTUAL1RC(Vector<String>, _get_classes_used, String)
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GDVIRTUAL2RC(Error, _rename_dependencies, String, Dictionary)
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GDVIRTUAL1RC(bool, _exists, String)
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GDVIRTUAL4RC(Variant, _load, String, String, bool, int)
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public:
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virtual Ref<Resource> load(const String &p_path, const String &p_original_path = "", Error *r_error = nullptr, bool p_use_sub_threads = false, float *r_progress = nullptr, CacheMode p_cache_mode = CACHE_MODE_REUSE);
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virtual bool exists(const String &p_path) const;
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virtual void get_recognized_extensions(List<String> *p_extensions) const;
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virtual void get_recognized_extensions_for_type(const String &p_type, List<String> *p_extensions) const;
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virtual bool recognize_path(const String &p_path, const String &p_for_type = String()) const;
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virtual bool handles_type(const String &p_type) const;
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virtual void get_classes_used(const String &p_path, HashSet<StringName> *r_classes);
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virtual String get_resource_type(const String &p_path) const;
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virtual String get_resource_script_class(const String &p_path) const;
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virtual ResourceUID::ID get_resource_uid(const String &p_path) const;
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virtual void get_dependencies(const String &p_path, List<String> *p_dependencies, bool p_add_types = false);
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virtual Error rename_dependencies(const String &p_path, const HashMap<String, String> &p_map);
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virtual bool is_import_valid(const String &p_path) const { return true; }
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virtual bool is_imported(const String &p_path) const { return false; }
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virtual int get_import_order(const String &p_path) const { return 0; }
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virtual String get_import_group_file(const String &p_path) const { return ""; } //no group
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virtual ~ResourceFormatLoader() {}
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};
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VARIANT_ENUM_CAST(ResourceFormatLoader::CacheMode)
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typedef void (*ResourceLoadErrorNotify)(const String &p_text);
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typedef void (*DependencyErrorNotify)(const String &p_loading, const String &p_which, const String &p_type);
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typedef Error (*ResourceLoaderImport)(const String &p_path);
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typedef void (*ResourceLoadedCallback)(Ref<Resource> p_resource, const String &p_path);
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class ResourceLoader {
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friend class LoadToken;
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enum {
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MAX_LOADERS = 64
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};
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struct ThreadLoadTask;
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public:
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enum ThreadLoadStatus {
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THREAD_LOAD_INVALID_RESOURCE,
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THREAD_LOAD_IN_PROGRESS,
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THREAD_LOAD_FAILED,
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THREAD_LOAD_LOADED
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};
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enum LoadThreadMode {
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LOAD_THREAD_FROM_CURRENT,
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LOAD_THREAD_SPAWN_SINGLE,
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LOAD_THREAD_DISTRIBUTE,
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};
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struct LoadToken : public RefCounted {
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String local_path;
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String user_path;
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uint32_t user_rc = 0; // Having user RC implies regular RC incremented in one, until the user RC reaches zero.
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ThreadLoadTask *task_if_unregistered = nullptr;
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void clear();
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virtual ~LoadToken();
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};
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static const int BINARY_MUTEX_TAG = 1;
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static Ref<LoadToken> _load_start(const String &p_path, const String &p_type_hint, LoadThreadMode p_thread_mode, ResourceFormatLoader::CacheMode p_cache_mode, bool p_for_user = false);
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static Ref<Resource> _load_complete(LoadToken &p_load_token, Error *r_error);
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private:
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static LoadToken *_load_threaded_request_reuse_user_token(const String &p_path);
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static void _load_threaded_request_setup_user_token(LoadToken *p_token, const String &p_path);
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static Ref<Resource> _load_complete_inner(LoadToken &p_load_token, Error *r_error, MutexLock<SafeBinaryMutex<BINARY_MUTEX_TAG>> &p_thread_load_lock);
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static Ref<ResourceFormatLoader> loader[MAX_LOADERS];
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static int loader_count;
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static bool timestamp_on_load;
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static void *err_notify_ud;
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static ResourceLoadErrorNotify err_notify;
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static void *dep_err_notify_ud;
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static DependencyErrorNotify dep_err_notify;
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static bool abort_on_missing_resource;
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static bool create_missing_resources_if_class_unavailable;
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static HashMap<String, Vector<String>> translation_remaps;
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static HashMap<String, String> path_remaps;
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static String _path_remap(const String &p_path, bool *r_translation_remapped = nullptr);
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friend class Resource;
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static SelfList<Resource>::List remapped_list;
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friend class ResourceFormatImporter;
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static Ref<Resource> _load(const String &p_path, const String &p_original_path, const String &p_type_hint, ResourceFormatLoader::CacheMode p_cache_mode, Error *r_error, bool p_use_sub_threads, float *r_progress);
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static ResourceLoadedCallback _loaded_callback;
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static Ref<ResourceFormatLoader> _find_custom_resource_format_loader(const String &path);
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struct ThreadLoadTask {
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WorkerThreadPool::TaskID task_id = 0; // Used if run on a worker thread from the pool.
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Thread::ID thread_id = 0; // Used if running on an user thread (e.g., simple non-threaded load).
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bool awaited = false; // If it's in the pool, this helps not awaiting from more than one dependent thread.
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ConditionVariable *cond_var = nullptr; // In not in the worker pool or already awaiting, this is used as a secondary awaiting mechanism.
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uint32_t awaiters_count = 0;
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bool need_wait = true;
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LoadToken *load_token = nullptr;
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String local_path;
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String type_hint;
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float progress = 0.0f;
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float max_reported_progress = 0.0f;
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uint64_t last_progress_check_main_thread_frame = UINT64_MAX;
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ThreadLoadStatus status = THREAD_LOAD_IN_PROGRESS;
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ResourceFormatLoader::CacheMode cache_mode = ResourceFormatLoader::CACHE_MODE_REUSE;
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Error error = OK;
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Ref<Resource> resource;
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bool use_sub_threads = false;
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HashSet<String> sub_tasks;
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struct ResourceChangedConnection {
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Resource *source = nullptr;
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Callable callable;
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uint32_t flags = 0;
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};
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LocalVector<ResourceChangedConnection> resource_changed_connections;
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};
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static void _run_load_task(void *p_userdata);
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static thread_local int load_nesting;
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static thread_local HashMap<int, HashMap<String, Ref<Resource>>> res_ref_overrides; // Outermost key is nesting level.
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static thread_local Vector<String> load_paths_stack;
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static thread_local ThreadLoadTask *curr_load_task;
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static SafeBinaryMutex<BINARY_MUTEX_TAG> thread_load_mutex;
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friend SafeBinaryMutex<BINARY_MUTEX_TAG> &_get_res_loader_mutex();
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static HashMap<String, ThreadLoadTask> thread_load_tasks;
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static bool cleaning_tasks;
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static HashMap<String, LoadToken *> user_load_tokens;
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static float _dependency_get_progress(const String &p_path);
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static bool _ensure_load_progress();
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public:
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static Error load_threaded_request(const String &p_path, const String &p_type_hint = "", bool p_use_sub_threads = false, ResourceFormatLoader::CacheMode p_cache_mode = ResourceFormatLoader::CACHE_MODE_REUSE);
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static ThreadLoadStatus load_threaded_get_status(const String &p_path, float *r_progress = nullptr);
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static Ref<Resource> load_threaded_get(const String &p_path, Error *r_error = nullptr);
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static bool is_within_load() { return load_nesting > 0; }
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static void resource_changed_connect(Resource *p_source, const Callable &p_callable, uint32_t p_flags);
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static void resource_changed_disconnect(Resource *p_source, const Callable &p_callable);
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static void resource_changed_emit(Resource *p_source);
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static Ref<Resource> load(const String &p_path, const String &p_type_hint = "", ResourceFormatLoader::CacheMode p_cache_mode = ResourceFormatLoader::CACHE_MODE_REUSE, Error *r_error = nullptr);
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static bool exists(const String &p_path, const String &p_type_hint = "");
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static void get_recognized_extensions_for_type(const String &p_type, List<String> *p_extensions);
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static void add_resource_format_loader(Ref<ResourceFormatLoader> p_format_loader, bool p_at_front = false);
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static void remove_resource_format_loader(Ref<ResourceFormatLoader> p_format_loader);
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static void get_classes_used(const String &p_path, HashSet<StringName> *r_classes);
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static String get_resource_type(const String &p_path);
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static String get_resource_script_class(const String &p_path);
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static ResourceUID::ID get_resource_uid(const String &p_path);
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static void get_dependencies(const String &p_path, List<String> *p_dependencies, bool p_add_types = false);
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static Error rename_dependencies(const String &p_path, const HashMap<String, String> &p_map);
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static bool is_import_valid(const String &p_path);
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static String get_import_group_file(const String &p_path);
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static bool is_imported(const String &p_path);
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static int get_import_order(const String &p_path);
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static void set_timestamp_on_load(bool p_timestamp) { timestamp_on_load = p_timestamp; }
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static bool get_timestamp_on_load() { return timestamp_on_load; }
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// Loaders can safely use this regardless which thread they are running on.
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static void notify_load_error(const String &p_err) {
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if (err_notify) {
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MessageQueue::get_main_singleton()->push_callable(callable_mp_static(err_notify).bind(p_err));
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}
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}
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static void set_error_notify_func(ResourceLoadErrorNotify p_err_notify) {
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err_notify = p_err_notify;
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}
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// Loaders can safely use this regardless which thread they are running on.
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static void notify_dependency_error(const String &p_path, const String &p_dependency, const String &p_type) {
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if (dep_err_notify) {
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if (Thread::get_caller_id() == Thread::get_main_id()) {
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dep_err_notify(p_path, p_dependency, p_type);
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} else {
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MessageQueue::get_main_singleton()->push_callable(callable_mp_static(dep_err_notify).bind(p_path, p_dependency, p_type));
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}
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}
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}
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static void set_dependency_error_notify_func(DependencyErrorNotify p_err_notify) {
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dep_err_notify = p_err_notify;
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}
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static void set_abort_on_missing_resources(bool p_abort) { abort_on_missing_resource = p_abort; }
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static bool get_abort_on_missing_resources() { return abort_on_missing_resource; }
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static String path_remap(const String &p_path);
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static String import_remap(const String &p_path);
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static void load_path_remaps();
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static void clear_path_remaps();
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static void reload_translation_remaps();
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static void load_translation_remaps();
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static void clear_translation_remaps();
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static void clear_thread_load_tasks();
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static void set_load_callback(ResourceLoadedCallback p_callback);
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static ResourceLoaderImport import;
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static bool add_custom_resource_format_loader(const String &script_path);
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static void add_custom_loaders();
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static void remove_custom_loaders();
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static void set_create_missing_resources_if_class_unavailable(bool p_enable);
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_FORCE_INLINE_ static bool is_creating_missing_resources_if_class_unavailable_enabled() { return create_missing_resources_if_class_unavailable; }
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static Ref<Resource> ensure_resource_ref_override_for_outer_load(const String &p_path, const String &p_res_type);
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static Ref<Resource> get_resource_ref_override(const String &p_path);
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static bool is_cleaning_tasks();
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static void initialize();
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static void finalize();
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};
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#endif // RESOURCE_LOADER_H
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