4ed1d977fc
Some platforms (*cough* web *cough*) have hard limits on the number of threads that can be spawned. Currently, ThreadPoolWork (mostly used in rendering/physics servers) will spawn as many threads as CPUs available causing exception on machines with high CPU count. This commit adds a new overridable method to OS that returns the default thread pool size (still the CPU count by default), and overrides it for the JavaScript platform so it always allocate only one thread. We can likely improve the whole ThreadPoolWork in the future to always allocate X amount of threads, and assign jobs to them on the fly, but that will require some more architectural changes.
103 lines
4.4 KiB
C++
103 lines
4.4 KiB
C++
/*************************************************************************/
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/* os_javascript.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) 2007-2021 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md). */
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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 OS_JAVASCRIPT_H
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#define OS_JAVASCRIPT_H
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#include "audio_driver_javascript.h"
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#include "core/input/input.h"
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#include "drivers/unix/os_unix.h"
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#include "servers/audio_server.h"
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#include <emscripten/html5.h>
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class OS_JavaScript : public OS_Unix {
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MainLoop *main_loop = nullptr;
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List<AudioDriverJavaScript *> audio_drivers;
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bool idb_is_syncing = false;
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bool idb_available = false;
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bool idb_needs_sync = false;
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static void main_loop_callback();
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static void file_access_close_callback(const String &p_file, int p_flags);
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static void fs_sync_callback();
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protected:
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void initialize() override;
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void set_main_loop(MainLoop *p_main_loop) override;
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void delete_main_loop() override;
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void finalize() override;
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bool _check_internal_feature_support(const String &p_feature) override;
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public:
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// Override return type to make writing static callbacks less tedious.
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static OS_JavaScript *get_singleton();
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void initialize_joypads() override;
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MainLoop *get_main_loop() const override;
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bool main_loop_iterate();
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Error execute(const String &p_path, const List<String> &p_arguments, String *r_pipe = nullptr, int *r_exitcode = nullptr, bool read_stderr = false, Mutex *p_pipe_mutex = nullptr) override;
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Error create_process(const String &p_path, const List<String> &p_arguments, ProcessID *r_child_id = nullptr) override;
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Error kill(const ProcessID &p_pid) override;
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int get_process_id() const override;
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int get_processor_count() const override;
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int get_default_thread_pool_size() const override { return 1; }
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String get_executable_path() const override;
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Error shell_open(String p_uri) override;
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String get_name() const override;
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// Override default OS implementation which would block the main thread with delay_usec.
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// Implemented in javascript_main.cpp loop callback instead.
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void add_frame_delay(bool p_can_draw) override {}
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String get_cache_path() const override;
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String get_config_path() const override;
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String get_data_path() const override;
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String get_user_data_dir() const override;
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bool is_userfs_persistent() const override;
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void alert(const String &p_alert, const String &p_title = "ALERT!") override;
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Error open_dynamic_library(const String p_path, void *&p_library_handle, bool p_also_set_library_path) override;
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void resume_audio();
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OS_JavaScript();
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};
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#endif
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