dccd71c7a3
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).
241 lines
7.6 KiB
C++
241 lines
7.6 KiB
C++
/*************************************************************************/
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/* os_javascript.cpp */
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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) 2007-2020 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2020 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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#include "os_javascript.h"
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#include "core/debugger/engine_debugger.h"
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#include "core/io/file_access_buffered_fa.h"
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#include "core/io/json.h"
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#include "drivers/unix/dir_access_unix.h"
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#include "drivers/unix/file_access_unix.h"
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#include "main/main.h"
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#include "modules/modules_enabled.gen.h"
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#include "platform/javascript/display_server_javascript.h"
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#ifdef MODULE_WEBSOCKET_ENABLED
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#include "modules/websocket/remote_debugger_peer_websocket.h"
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#endif
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#include <emscripten.h>
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#include <stdlib.h>
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// Lifecycle
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void OS_JavaScript::initialize() {
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OS_Unix::initialize_core();
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FileAccess::make_default<FileAccessBufferedFA<FileAccessUnix>>(FileAccess::ACCESS_RESOURCES);
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DisplayServerJavaScript::register_javascript_driver();
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#ifdef MODULE_WEBSOCKET_ENABLED
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EngineDebugger::register_uri_handler("ws://", RemoteDebuggerPeerWebSocket::create);
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EngineDebugger::register_uri_handler("wss://", RemoteDebuggerPeerWebSocket::create);
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#endif
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}
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void OS_JavaScript::resume_audio() {
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if (audio_driver_javascript) {
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audio_driver_javascript->resume();
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}
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}
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void OS_JavaScript::set_main_loop(MainLoop *p_main_loop) {
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main_loop = p_main_loop;
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}
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MainLoop *OS_JavaScript::get_main_loop() const {
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return main_loop;
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}
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extern "C" EMSCRIPTEN_KEEPALIVE void _idb_synced() {
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OS_JavaScript::get_singleton()->idb_is_syncing = false;
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}
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bool OS_JavaScript::main_loop_iterate() {
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if (is_userfs_persistent() && idb_needs_sync && !idb_is_syncing) {
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idb_is_syncing = true;
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idb_needs_sync = false;
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/* clang-format off */
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EM_ASM({
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FS.syncfs(function(error) {
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if (error) {
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err('Failed to save IDB file system: ' + error.message);
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}
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ccall("_idb_synced", 'void', [], []);
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});
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});
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/* clang-format on */
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}
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DisplayServer::get_singleton()->process_events();
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return Main::iteration();
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}
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void OS_JavaScript::delete_main_loop() {
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if (main_loop) {
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memdelete(main_loop);
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}
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main_loop = nullptr;
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}
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void OS_JavaScript::finalize_async() {
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finalizing = true;
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if (audio_driver_javascript) {
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audio_driver_javascript->finish_async();
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}
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}
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void OS_JavaScript::finalize() {
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delete_main_loop();
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if (audio_driver_javascript) {
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memdelete(audio_driver_javascript);
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audio_driver_javascript = nullptr;
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}
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}
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// Miscellaneous
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Error OS_JavaScript::execute(const String &p_path, const List<String> &p_arguments, bool p_blocking, ProcessID *r_child_id, String *r_pipe, int *r_exitcode, bool read_stderr, Mutex *p_pipe_mutex) {
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Array args;
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for (const List<String>::Element *E = p_arguments.front(); E; E = E->next()) {
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args.push_back(E->get());
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}
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String json_args = JSON::print(args);
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/* clang-format off */
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int failed = EM_ASM_INT({
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const json_args = UTF8ToString($0);
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const args = JSON.parse(json_args);
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if (Module["onExecute"]) {
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Module["onExecute"](args);
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return 0;
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}
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return 1;
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}, json_args.utf8().get_data());
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/* clang-format on */
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ERR_FAIL_COND_V_MSG(failed, ERR_UNAVAILABLE, "OS::execute() must be implemented in JavaScript via 'engine.setOnExecute' if required.");
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return OK;
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}
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Error OS_JavaScript::kill(const ProcessID &p_pid) {
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ERR_FAIL_V_MSG(ERR_UNAVAILABLE, "OS::kill() is not available on the HTML5 platform.");
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}
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int OS_JavaScript::get_process_id() const {
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ERR_FAIL_V_MSG(0, "OS::get_process_id() is not available on the HTML5 platform.");
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}
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bool OS_JavaScript::_check_internal_feature_support(const String &p_feature) {
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if (p_feature == "HTML5" || p_feature == "web")
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return true;
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#ifdef JAVASCRIPT_EVAL_ENABLED
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if (p_feature == "JavaScript")
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return true;
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#endif
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return false;
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}
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String OS_JavaScript::get_executable_path() const {
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return OS::get_executable_path();
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}
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Error OS_JavaScript::shell_open(String p_uri) {
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// Open URI in a new tab, browser will deal with it by protocol.
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/* clang-format off */
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EM_ASM_({
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window.open(UTF8ToString($0), '_blank');
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}, p_uri.utf8().get_data());
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/* clang-format on */
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return OK;
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}
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String OS_JavaScript::get_name() const {
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return "HTML5";
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}
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String OS_JavaScript::get_user_data_dir() const {
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return "/userfs";
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};
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String OS_JavaScript::get_cache_path() const {
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return "/home/web_user/.cache";
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}
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String OS_JavaScript::get_config_path() const {
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return "/home/web_user/.config";
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}
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String OS_JavaScript::get_data_path() const {
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return "/home/web_user/.local/share";
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}
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void OS_JavaScript::file_access_close_callback(const String &p_file, int p_flags) {
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OS_JavaScript *os = OS_JavaScript::get_singleton();
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if (!(os->is_userfs_persistent() && (p_flags & FileAccess::WRITE))) {
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return; // FS persistence is not working or we are not writing.
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}
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bool is_file_persistent = p_file.begins_with("/userfs");
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#ifdef TOOLS_ENABLED
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// Hack for editor persistence (can we track).
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is_file_persistent = is_file_persistent || p_file.begins_with("/home/web_user/");
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#endif
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if (is_file_persistent) {
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os->idb_needs_sync = true;
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}
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}
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void OS_JavaScript::set_idb_available(bool p_idb_available) {
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idb_available = p_idb_available;
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}
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bool OS_JavaScript::is_userfs_persistent() const {
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return idb_available;
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}
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OS_JavaScript *OS_JavaScript::get_singleton() {
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return static_cast<OS_JavaScript *>(OS::get_singleton());
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}
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void OS_JavaScript::initialize_joypads() {
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}
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OS_JavaScript::OS_JavaScript() {
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if (AudioDriverJavaScript::is_available()) {
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audio_driver_javascript = memnew(AudioDriverJavaScript);
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AudioDriverManager::add_driver(audio_driver_javascript);
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}
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Vector<Logger *> loggers;
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loggers.push_back(memnew(StdLogger));
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_set_logger(memnew(CompositeLogger(loggers)));
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FileAccessUnix::close_notification_func = file_access_close_callback;
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}
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