99fe462452
- Based on C++11's `thread` and `thread_local` - No more need to allocate-deallocate or check for null - No pointer anymore, just a member variable - Platform-specific implementations no longer needed (except for the few cases of non-portable functions) - Simpler for `NO_THREADS` - Thread ids are now the same across platforms (main is 1; others follow)
118 lines
4.4 KiB
C++
118 lines
4.4 KiB
C++
/*************************************************************************/
|
|
/* thread.cpp */
|
|
/*************************************************************************/
|
|
/* This file is part of: */
|
|
/* GODOT ENGINE */
|
|
/* https://godotengine.org */
|
|
/*************************************************************************/
|
|
/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur. */
|
|
/* Copyright (c) 2014-2021 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. */
|
|
/*************************************************************************/
|
|
|
|
#include "thread.h"
|
|
|
|
#include "core/object/script_language.h"
|
|
|
|
#if !defined(NO_THREADS)
|
|
|
|
Error (*Thread::set_name_func)(const String &) = nullptr;
|
|
void (*Thread::set_priority_func)(Thread::Priority) = nullptr;
|
|
void (*Thread::init_func)() = nullptr;
|
|
void (*Thread::term_func)() = nullptr;
|
|
|
|
Thread::ID Thread::main_thread_id = 1;
|
|
Thread::ID Thread::last_thread_id = 1;
|
|
thread_local Thread::ID Thread::caller_id = 1;
|
|
|
|
void Thread::_set_platform_funcs(
|
|
Error (*p_set_name_func)(const String &),
|
|
void (*p_set_priority_func)(Thread::Priority),
|
|
void (*p_init_func)(),
|
|
void (*p_term_func)()) {
|
|
Thread::set_name_func = p_set_name_func;
|
|
Thread::set_priority_func = p_set_priority_func;
|
|
Thread::init_func = p_init_func;
|
|
Thread::term_func = p_term_func;
|
|
}
|
|
|
|
void Thread::callback(Thread *p_self, const Settings &p_settings, Callback p_callback, void *p_userdata) {
|
|
Thread::caller_id = p_self->id;
|
|
if (set_priority_func) {
|
|
set_priority_func(p_settings.priority);
|
|
}
|
|
if (init_func) {
|
|
init_func();
|
|
}
|
|
ScriptServer::thread_enter(); //scripts may need to attach a stack
|
|
p_callback(p_userdata);
|
|
ScriptServer::thread_exit();
|
|
if (term_func) {
|
|
term_func();
|
|
}
|
|
}
|
|
|
|
void Thread::start(Thread::Callback p_callback, void *p_user, const Settings &p_settings) {
|
|
if (id != 0) {
|
|
#ifdef DEBUG_ENABLED
|
|
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.");
|
|
#endif
|
|
thread.detach();
|
|
std::thread empty_thread;
|
|
thread.swap(empty_thread);
|
|
}
|
|
id = atomic_increment(&last_thread_id);
|
|
std::thread new_thread(&Thread::callback, this, p_settings, p_callback, p_user);
|
|
thread.swap(new_thread);
|
|
}
|
|
|
|
bool Thread::is_started() const {
|
|
return id != 0;
|
|
}
|
|
|
|
void Thread::wait_to_finish() {
|
|
if (id != 0) {
|
|
thread.join();
|
|
std::thread empty_thread;
|
|
thread.swap(empty_thread);
|
|
id = 0;
|
|
}
|
|
}
|
|
|
|
Error Thread::set_name(const String &p_name) {
|
|
if (set_name_func) {
|
|
return set_name_func(p_name);
|
|
}
|
|
|
|
return ERR_UNAVAILABLE;
|
|
}
|
|
|
|
Thread::~Thread() {
|
|
if (id != 0) {
|
|
#ifdef DEBUG_ENABLED
|
|
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.");
|
|
#endif
|
|
thread.detach();
|
|
}
|
|
}
|
|
|
|
#endif
|