1426cd3b3a
As many open source projects have started doing it, we're removing the current year from the copyright notice, so that we don't need to bump it every year. It seems like only the first year of publication is technically relevant for copyright notices, and even that seems to be something that many companies stopped listing altogether (in a version controlled codebase, the commits are a much better source of date of publication than a hardcoded copyright statement). We also now list Godot Engine contributors first as we're collectively the current maintainers of the project, and we clarify that the "exclusive" copyright of the co-founders covers the timespan before opensourcing (their further contributions are included as part of Godot Engine contributors). Also fixed "cf." Frenchism - it's meant as "refer to / see". Backported from #70885.
141 lines
5.2 KiB
C++
141 lines
5.2 KiB
C++
/**************************************************************************/
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/* thread.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) 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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#include "platform_config.h"
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#ifndef PLATFORM_THREAD_OVERRIDE // See details in thread.h
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#include "thread.h"
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#include "core/script_language.h"
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#if !defined(NO_THREADS)
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#include "core/safe_refcount.h"
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Error (*Thread::set_name_func)(const String &) = nullptr;
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void (*Thread::set_priority_func)(Thread::Priority) = nullptr;
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void (*Thread::init_func)() = nullptr;
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void (*Thread::term_func)() = nullptr;
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uint64_t Thread::_thread_id_hash(const std::thread::id &p_t) {
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static std::hash<std::thread::id> hasher;
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return hasher(p_t);
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}
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Thread::ID Thread::main_thread_id = _thread_id_hash(std::this_thread::get_id());
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static thread_local Thread::ID caller_id = 0;
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static thread_local bool caller_id_cached = false;
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void Thread::_set_platform_funcs(
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Error (*p_set_name_func)(const String &),
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void (*p_set_priority_func)(Thread::Priority),
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void (*p_init_func)(),
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void (*p_term_func)()) {
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Thread::set_name_func = p_set_name_func;
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Thread::set_priority_func = p_set_priority_func;
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Thread::init_func = p_init_func;
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Thread::term_func = p_term_func;
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}
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void Thread::callback(Thread *p_self, const Settings &p_settings, Callback p_callback, void *p_userdata) {
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caller_id = _thread_id_hash(p_self->thread.get_id());
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caller_id_cached = true;
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if (set_priority_func) {
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set_priority_func(p_settings.priority);
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}
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if (init_func) {
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init_func();
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}
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ScriptServer::thread_enter(); //scripts may need to attach a stack
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p_callback(p_userdata);
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ScriptServer::thread_exit();
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if (term_func) {
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term_func();
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}
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}
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void Thread::start(Thread::Callback p_callback, void *p_user, const Settings &p_settings) {
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if (id != _thread_id_hash(std::thread::id())) {
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#ifdef DEBUG_ENABLED
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WARN_PRINT("A Thread object has been re-started without wait_to_finish() having been called on it. Please do so to ensure correct cleanup of the thread.");
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#endif
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thread.detach();
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std::thread empty_thread;
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thread.swap(empty_thread);
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}
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std::thread new_thread(&Thread::callback, this, p_settings, p_callback, p_user);
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thread.swap(new_thread);
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id = _thread_id_hash(thread.get_id());
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}
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bool Thread::is_started() const {
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return id != _thread_id_hash(std::thread::id());
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}
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void Thread::wait_to_finish() {
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if (id != _thread_id_hash(std::thread::id())) {
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ERR_FAIL_COND_MSG(id == get_caller_id(), "A Thread can't wait for itself to finish.");
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thread.join();
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std::thread empty_thread;
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thread.swap(empty_thread);
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id = _thread_id_hash(std::thread::id());
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}
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}
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Error Thread::set_name(const String &p_name) {
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if (set_name_func) {
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return set_name_func(p_name);
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}
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return ERR_UNAVAILABLE;
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}
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Thread::~Thread() {
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if (id != _thread_id_hash(std::thread::id())) {
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#ifdef DEBUG_ENABLED
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WARN_PRINT("A Thread object has been destroyed without wait_to_finish() having been called on it. Please do so to ensure correct cleanup of the thread.");
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#endif
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thread.detach();
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}
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}
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Thread::ID Thread::get_caller_id() {
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if (likely(caller_id_cached)) {
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return caller_id;
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} else {
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caller_id = _thread_id_hash(std::this_thread::get_id());
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caller_id_cached = true;
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return caller_id;
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}
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}
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#endif
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#endif // PLATFORM_THREAD_OVERRIDE
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