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#pragma once
#ifdef USE_PTHREADPOOL
#ifdef USE_INTERNAL_PTHREADPOOL_IMPL
#include <caffe2/utils/threadpool/pthreadpool.h>
#else
#include <pthreadpool.h>
#endif
#include <functional>
#include <memory>
#include <mutex>
namespace caffe2 {
class PThreadPool final {
public:
explicit PThreadPool(size_t thread_count);
~PThreadPool() = default;
PThreadPool(const PThreadPool&) = delete;
PThreadPool& operator=(const PThreadPool&) = delete;
PThreadPool(PThreadPool&&) = delete;
PThreadPool& operator=(PThreadPool&&) = delete;
size_t get_thread_count() const;
void set_thread_count(size_t thread_count);
// Run, in parallel, function fn(task_id) over task_id in range [0, range).
// This function is blocking. All input is processed by the time it returns.
void run(const std::function<void(size_t)>& fn, size_t range);
private:
friend pthreadpool_t pthreadpool_();
private:
mutable std::mutex mutex_;
std::unique_ptr<pthreadpool, decltype(&pthreadpool_destroy)> threadpool_;
};
// Return a singleton instance of PThreadPool for ATen/TH multithreading.
PThreadPool* pthreadpool();
PThreadPool* pthreadpool(size_t thread_count);
// Exposes the underlying implementation of PThreadPool.
// Only for use in external libraries so as to unify threading across
// internal (i.e. ATen, etc.) and external (e.g. NNPACK, QNNPACK, XNNPACK)
// use cases.
pthreadpool_t pthreadpool_();
} // namespace caffe2
#endif /* USE_PTHREADPOOL */
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