godot/core/os/threaded_array_processor.h
Rémi Verschelde cb282c6ef0 Style: Set clang-format Standard to Cpp11
For us, it practically only changes the fact that `A<A<int>>` is now
used instead of the C++03 compatible `A<A<int> >`.

Note: clang-format 10+ changed the `Standard` arguments to fully
specified `c++11`, `c++14`, etc. versions, but we can't use `c++17`
now if we want to preserve compatibility with clang-format 8 and 9.
`Cpp11` is still supported as deprecated alias for `Latest`.
2020-03-17 07:36:24 +01:00

111 lines
3.9 KiB
C++

/*************************************************************************/
/* threaded_array_processor.h */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2020 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 THREADED_ARRAY_PROCESSOR_H
#define THREADED_ARRAY_PROCESSOR_H
#include "core/os/mutex.h"
#include "core/os/os.h"
#include "core/os/thread.h"
#include "core/os/thread_safe.h"
#include "core/safe_refcount.h"
template <class C, class U>
struct ThreadArrayProcessData {
uint32_t elements;
uint32_t index;
C *instance;
U userdata;
void (C::*method)(uint32_t, U);
void process(uint32_t p_index) {
(instance->*method)(p_index, userdata);
}
};
#ifndef NO_THREADS
template <class T>
void process_array_thread(void *ud) {
T &data = *(T *)ud;
while (true) {
uint32_t index = atomic_increment(&data.index);
if (index >= data.elements)
break;
data.process(index);
}
}
template <class C, class M, class U>
void thread_process_array(uint32_t p_elements, C *p_instance, M p_method, U p_userdata) {
ThreadArrayProcessData<C, U> data;
data.method = p_method;
data.instance = p_instance;
data.userdata = p_userdata;
data.index = 0;
data.elements = p_elements;
data.process(data.index); //process first, let threads increment for next
Vector<Thread *> threads;
threads.resize(OS::get_singleton()->get_processor_count());
for (int i = 0; i < threads.size(); i++) {
threads.write[i] = Thread::create(process_array_thread<ThreadArrayProcessData<C, U>>, &data);
}
for (int i = 0; i < threads.size(); i++) {
Thread::wait_to_finish(threads[i]);
memdelete(threads[i]);
}
}
#else
template <class C, class M, class U>
void thread_process_array(uint32_t p_elements, C *p_instance, M p_method, U p_userdata) {
ThreadArrayProcessData<C, U> data;
data.method = p_method;
data.instance = p_instance;
data.userdata = p_userdata;
data.index = 0;
data.elements = p_elements;
for (uint32_t i = 0; i < p_elements; i++) {
data.process(i);
}
}
#endif
#endif // THREADED_ARRAY_PROCESSOR_H