mirror of
https://github.com/godotengine/godot.git
synced 2024-12-21 10:25:24 +08:00
124 lines
4.6 KiB
C++
124 lines
4.6 KiB
C++
/**************************************************************************/
|
|
/* thread.h */
|
|
/**************************************************************************/
|
|
/* This file is part of: */
|
|
/* GODOT ENGINE */
|
|
/* https://godotengine.org */
|
|
/**************************************************************************/
|
|
/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
|
|
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
|
|
/* */
|
|
/* 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 "platform_config.h"
|
|
// Define PLATFORM_THREAD_OVERRIDE in your platform's `platform_config.h`
|
|
// to use a custom Thread implementation defined in `platform/[your_platform]/platform_thread.h`
|
|
// Overriding the platform implementation is required in some proprietary platforms
|
|
#ifdef PLATFORM_THREAD_OVERRIDE
|
|
#include "platform_thread.h"
|
|
#else
|
|
|
|
#ifndef THREAD_H
|
|
#define THREAD_H
|
|
|
|
#include "core/templates/safe_refcount.h"
|
|
#include "core/typedefs.h"
|
|
|
|
#include <thread>
|
|
|
|
class String;
|
|
|
|
class Thread {
|
|
public:
|
|
typedef void (*Callback)(void *p_userdata);
|
|
|
|
typedef uint64_t ID;
|
|
|
|
enum : ID {
|
|
UNASSIGNED_ID = 0,
|
|
MAIN_ID = 1
|
|
};
|
|
|
|
enum Priority {
|
|
PRIORITY_LOW,
|
|
PRIORITY_NORMAL,
|
|
PRIORITY_HIGH
|
|
};
|
|
|
|
struct Settings {
|
|
Priority priority;
|
|
Settings() { priority = PRIORITY_NORMAL; }
|
|
};
|
|
|
|
struct PlatformFunctions {
|
|
Error (*set_name)(const String &) = nullptr;
|
|
void (*set_priority)(Thread::Priority) = nullptr;
|
|
void (*init)() = nullptr;
|
|
void (*wrapper)(Thread::Callback, void *) = nullptr;
|
|
void (*term)() = nullptr;
|
|
};
|
|
|
|
private:
|
|
friend class Main;
|
|
|
|
ID id = UNASSIGNED_ID;
|
|
static SafeNumeric<uint64_t> id_counter;
|
|
static thread_local ID caller_id;
|
|
std::thread thread;
|
|
|
|
static void callback(ID p_caller_id, const Settings &p_settings, Thread::Callback p_callback, void *p_userdata);
|
|
|
|
static PlatformFunctions platform_functions;
|
|
|
|
static void make_main_thread() { caller_id = MAIN_ID; }
|
|
static void release_main_thread() { caller_id = UNASSIGNED_ID; }
|
|
|
|
public:
|
|
static void _set_platform_functions(const PlatformFunctions &p_functions);
|
|
|
|
_FORCE_INLINE_ ID get_id() const { return id; }
|
|
// get the ID of the caller thread
|
|
_FORCE_INLINE_ static ID get_caller_id() {
|
|
if (unlikely(caller_id == UNASSIGNED_ID)) {
|
|
caller_id = id_counter.increment();
|
|
}
|
|
return caller_id;
|
|
}
|
|
// get the ID of the main thread
|
|
_FORCE_INLINE_ static ID get_main_id() { return MAIN_ID; }
|
|
|
|
_FORCE_INLINE_ static bool is_main_thread() { return caller_id == MAIN_ID; } // Gain a tiny bit of perf here because there is no need to validate caller_id here, because only main thread will be set as 1.
|
|
|
|
static Error set_name(const String &p_name);
|
|
|
|
ID 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();
|
|
~Thread();
|
|
};
|
|
|
|
#endif // THREAD_H
|
|
|
|
#endif // PLATFORM_THREAD_OVERRIDE
|