event_pool.hpp

/*
 * VecMem project, part of the ACTS project (R&D line)
 *
 * (c) 2026 CERN for the benefit of the ACTS project
 *
 * Mozilla Public License Version 2.0
 */
 
#pragma once
 
// CUDA include(s).
#include <cuda_runtime_api.h>
 
// System include(s).
#include <vector>
 
namespace vecmem {
namespace cuda {
namespace details {
 
class event_pool {
 
public:
    explicit event_pool(std::size_t size = 8u);
    event_pool(unsigned int event_flags, std::size_t size = 8u);
    ~event_pool();
 
    cudaEvent_t create();
    void free(cudaEvent_t event);
 
private:
    void initialize(std::size_t size);
 
    unsigned int m_event_flags = cudaEventDisableTiming;
    std::vector<cudaEvent_t> m_pool;
    std::size_t m_used_events = 0;
 
};  // class event_pool
 
}  // namespace details
}  // namespace cuda
}  // namespace vecmem