mirror of
https://github.com/cocos/cocos-engine.git
synced 2026-09-09 09:08:54 +08:00
98 lines
2.6 KiB
C++
98 lines
2.6 KiB
C++
/****************************************************************************
|
|
Copyright (c) 2021 Xiamen Yaji Software Co., Ltd.
|
|
|
|
http://www.cocos.com
|
|
|
|
Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
of this software and associated engine source code (the "Software"), a limited,
|
|
worldwide, royalty-free, non-assignable, revocable and non-exclusive license
|
|
to use Cocos Creator solely to develop games on your target platforms. You shall
|
|
not use Cocos Creator software for developing other software or tools that's
|
|
used for developing games. You are not granted to publish, distribute,
|
|
sublicense, and/or sell copies of Cocos Creator.
|
|
|
|
The software or tools in this License Agreement are licensed, not sold.
|
|
Xiamen Yaji Software Co., Ltd. reserves all rights not expressly granted to you.
|
|
|
|
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 "ThreadPool.h"
|
|
|
|
namespace cc {
|
|
|
|
uint8_t const ThreadPool::kCpuCoreCount = std::thread::hardware_concurrency();
|
|
uint8_t const ThreadPool::kMaxThreadCount = kCpuCoreCount - 1;
|
|
|
|
void ThreadPool::Start() noexcept
|
|
{
|
|
if (mRunning)
|
|
{
|
|
return;
|
|
}
|
|
|
|
mRunning = true;
|
|
|
|
for (uint8_t i = 0; i < kMaxThreadCount; ++i)
|
|
{
|
|
AddThread();
|
|
}
|
|
}
|
|
|
|
void ThreadPool::Stop() noexcept
|
|
{
|
|
if (! mRunning)
|
|
{
|
|
return;
|
|
}
|
|
|
|
mRunning = false;
|
|
mEvent.SignalAll();
|
|
|
|
for (auto& worker : mWorkers)
|
|
{
|
|
if (worker.joinable())
|
|
{
|
|
worker.join();
|
|
}
|
|
}
|
|
|
|
mWorkers.clear();
|
|
}
|
|
|
|
void ThreadPool::AddThread() noexcept
|
|
{
|
|
assert(mWorkers.size() < kMaxThreadCount);
|
|
|
|
auto workerLoop = [this]()
|
|
{
|
|
while (mRunning)
|
|
{
|
|
Task task = nullptr;
|
|
|
|
if (mTasks.try_dequeue(task))
|
|
{
|
|
task();
|
|
}
|
|
else
|
|
{
|
|
// Double Check
|
|
mEvent.Wait([this]()
|
|
{
|
|
return mTasks.size_approx() != 0;
|
|
});
|
|
}
|
|
}
|
|
};
|
|
|
|
mWorkers.emplace_back(workerLoop);
|
|
}
|
|
|
|
} // namespace cc
|