godot/platform/javascript/os_javascript.h
Fabio Alessandrelli dccd71c7a3 JS synchronous start, better persistent FS sync.
The engine now expects to emscripten FS to be setup and sync-ed before
main is called. This is exposed via `Module["initFS"]` which also allows
to setup multiple persistence paths (internal use only for now).

Additionally, FS syncing is done **once** for every loop if at least one
file in a persistent path was open for writing and closed, and if the FS
is not syncing already.

This should potentially fix issues reported by users where "autosave"
would not work on the web (never calling `syncfs` because of too many
writes).
2020-09-23 09:51:06 +02:00

101 lines
4.2 KiB
C++

/*************************************************************************/
/* os_javascript.h */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2020 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. */
/*************************************************************************/
#ifndef OS_JAVASCRIPT_H
#define OS_JAVASCRIPT_H
#include "audio_driver_javascript.h"
#include "core/input/input.h"
#include "drivers/unix/os_unix.h"
#include "servers/audio_server.h"
#include <emscripten/html5.h>
class OS_JavaScript : public OS_Unix {
MainLoop *main_loop = nullptr;
AudioDriverJavaScript *audio_driver_javascript = nullptr;
bool finalizing = false;
bool idb_available = false;
bool idb_needs_sync = false;
static void main_loop_callback();
static void file_access_close_callback(const String &p_file, int p_flags);
protected:
void initialize() override;
void set_main_loop(MainLoop *p_main_loop) override;
void delete_main_loop() override;
void finalize() override;
bool _check_internal_feature_support(const String &p_feature) override;
public:
bool idb_is_syncing = false;
// Override return type to make writing static callbacks less tedious.
static OS_JavaScript *get_singleton();
void initialize_joypads() override;
MainLoop *get_main_loop() const override;
void finalize_async();
bool main_loop_iterate();
Error execute(const String &p_path, const List<String> &p_arguments, bool p_blocking = true, ProcessID *r_child_id = nullptr, String *r_pipe = nullptr, int *r_exitcode = nullptr, bool read_stderr = false, Mutex *p_pipe_mutex = nullptr) override;
Error kill(const ProcessID &p_pid) override;
int get_process_id() const override;
String get_executable_path() const override;
Error shell_open(String p_uri) override;
String get_name() const override;
// Override default OS implementation which would block the main thread with delay_usec.
// Implemented in javascript_main.cpp loop callback instead.
void add_frame_delay(bool p_can_draw) override {}
String get_cache_path() const override;
String get_config_path() const override;
String get_data_path() const override;
String get_user_data_dir() const override;
void set_idb_available(bool p_idb_available);
bool is_userfs_persistent() const override;
void resume_audio();
bool is_finalizing() { return finalizing; }
OS_JavaScript();
};
#endif