57 lines
1.4 KiB
C++
57 lines
1.4 KiB
C++
#pragma once
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#include "Impl/ImmediateScheduler.h"
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#include "Impl/cesium-async++.h"
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#include "Library.h"
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#include <memory>
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namespace CesiumAsync {
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/**
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* @brief A thread pool created by {@link AsyncSystem::createThreadPool}.
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*
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* This object has no public methods, but can be used with
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* {@link AsyncSystem::runInThreadPool} and
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* {@link Future::thenInThreadPool}.
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*/
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class CESIUMASYNC_API ThreadPool {
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public:
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/**
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* @brief Creates a new thread pool with the given number of threads.
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*
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* @param numberOfThreads The number of threads to create in this ThreadPool.
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*/
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ThreadPool(int32_t numberOfThreads);
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private:
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struct Scheduler {
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Scheduler(int32_t numberOfThreads);
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void schedule(async::task_run_handle t);
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CesiumImpl::ImmediateScheduler<Scheduler> immediate{this};
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async::threadpool_scheduler scheduler;
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};
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static auto createPreRun(ThreadPool::Scheduler* pScheduler) {
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return
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[pScheduler]() { ThreadPool::_scope = pScheduler->immediate.scope(); };
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}
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static auto createPostRun() noexcept {
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return []() noexcept { ThreadPool::_scope.reset(); };
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}
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static thread_local CesiumImpl::ImmediateScheduler<Scheduler>::SchedulerScope
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_scope;
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std::shared_ptr<Scheduler> _pScheduler;
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template <typename T> friend class Future;
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template <typename T> friend class SharedFuture;
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friend class AsyncSystem;
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};
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} // namespace CesiumAsync
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