godot/thirdparty/thorvg/src/renderer/tvgTaskScheduler.cpp

/*
 * Copyright (c) 2020 - 2024 the ThorVG project. All rights reserved.

 * 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 "tvgArray.h"
#include "tvgInlist.h"
#include "tvgTaskScheduler.h"

#ifdef THORVG_THREAD_SUPPORT
    #include <thread>
    #include <atomic>
#endif

/************************************************************************/
/* Internal Class Implementation                                        */
/************************************************************************/

namespace tvg {

struct TaskSchedulerImpl;
static TaskSchedulerImpl* inst = …;

#ifdef THORVG_THREAD_SUPPORT

static thread_local bool _async = …;

struct TaskQueue { … };


struct TaskSchedulerImpl
{ … };

#else //THORVG_THREAD_SUPPORT

static bool _async = true;

struct TaskSchedulerImpl
{
    TaskSchedulerImpl(TVG_UNUSED uint32_t threadCnt) {}
    void request(Task* task) { task->run(0); }
    uint32_t threadCnt() { return 0; }
};

#endif //THORVG_THREAD_SUPPORT

} //namespace

/************************************************************************/
/* External Class Implementation                                        */
/************************************************************************/

void TaskScheduler::init(uint32_t threads)
{ … }


void TaskScheduler::term()
{ … }


void TaskScheduler::request(Task* task)
{ … }


uint32_t TaskScheduler::threads()
{ … }


void TaskScheduler::async(bool on)
{ … }