8e128726f0
- Based on C++11's `atomic` - Reworked `SafeRefCount` (based on the rewrite by @hpvb) - Replaced free atomic functions by the new `SafeNumeric<T>` - Replaced wrong cases of `volatile bool` by the new `SafeFlag` - Platform-specific implementations no longer needed Co-authored-by: Hein-Pieter van Braam-Stewart <hp@tmm.cx>
117 lines
4.3 KiB
C++
117 lines
4.3 KiB
C++
/*************************************************************************/
|
|
/* thread.h */
|
|
/*************************************************************************/
|
|
/* 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. */
|
|
/*************************************************************************/
|
|
|
|
#ifndef THREAD_H
|
|
#define THREAD_H
|
|
|
|
#include "core/typedefs.h"
|
|
|
|
#if !defined(NO_THREADS)
|
|
#include "core/templates/safe_refcount.h"
|
|
#include <thread>
|
|
#endif
|
|
|
|
class String;
|
|
|
|
class Thread {
|
|
public:
|
|
typedef void (*Callback)(void *p_userdata);
|
|
|
|
typedef uint64_t ID;
|
|
|
|
enum Priority {
|
|
PRIORITY_LOW,
|
|
PRIORITY_NORMAL,
|
|
PRIORITY_HIGH
|
|
};
|
|
|
|
struct Settings {
|
|
Priority priority;
|
|
Settings() { priority = PRIORITY_NORMAL; }
|
|
};
|
|
|
|
private:
|
|
#if !defined(NO_THREADS)
|
|
friend class Main;
|
|
|
|
static ID main_thread_id;
|
|
static SafeNumeric<Thread::ID> last_thread_id;
|
|
|
|
ID id = 0;
|
|
static thread_local ID caller_id;
|
|
std::thread thread;
|
|
|
|
static void callback(Thread *p_self, const Settings &p_settings, Thread::Callback p_callback, void *p_userdata);
|
|
|
|
static Error (*set_name_func)(const String &);
|
|
static void (*set_priority_func)(Thread::Priority);
|
|
static void (*init_func)();
|
|
static void (*term_func)();
|
|
#endif
|
|
|
|
public:
|
|
static void _set_platform_funcs(
|
|
Error (*p_set_name_func)(const String &),
|
|
void (*p_set_priority_func)(Thread::Priority),
|
|
void (*p_init_func)() = nullptr,
|
|
void (*p_term_func)() = nullptr);
|
|
|
|
#if !defined(NO_THREADS)
|
|
_FORCE_INLINE_ ID get_id() const { return id; }
|
|
// get the ID of the caller thread
|
|
_FORCE_INLINE_ static ID get_caller_id() { return caller_id; }
|
|
// get the ID of the main thread
|
|
_FORCE_INLINE_ static ID get_main_id() { return main_thread_id; }
|
|
|
|
static Error set_name(const String &p_name);
|
|
|
|
void start(Thread::Callback p_callback, void *p_user, const Settings &p_settings = Settings());
|
|
bool is_started() const;
|
|
///< waits until thread is finished, and deallocates it.
|
|
void wait_to_finish();
|
|
|
|
~Thread();
|
|
#else
|
|
_FORCE_INLINE_ ID get_id() const { return 0; }
|
|
// get the ID of the caller thread
|
|
_FORCE_INLINE_ static ID get_caller_id() { return 0; }
|
|
// get the ID of the main thread
|
|
_FORCE_INLINE_ static ID get_main_id() { return 0; }
|
|
|
|
static Error set_name(const String &p_name) { return ERR_UNAVAILABLE; }
|
|
|
|
void start(Thread::Callback p_callback, void *p_user, const Settings &p_settings = Settings()) {}
|
|
bool is_started() const { return false; }
|
|
void wait_to_finish() {}
|
|
#endif
|
|
};
|
|
|
|
#endif // THREAD_H
|