AMReX_PArena.H

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#ifndef AMREX_PARENA_H_
#define AMREX_PARENA_H_
#include <AMReX_Config.H>
 
#include <AMReX_Arena.H>
#include <AMReX_GpuControl.H>
 
#ifdef AMREX_USE_CUDA
#include <cuda.h>
#endif
 
namespace amrex {

class PArena
    :
    public Arena
{
public:
    PArena (Long release_threshold);
    PArena (const PArena& rhs) = delete;
    PArena (PArena&& rhs) = delete;
    PArena& operator= (const PArena& rhs) = delete;
    PArena& operator= (PArena&& rhs) = delete;
    ~PArena () override;
 
    [[nodiscard]] void* alloc (std::size_t nbytes) final;
    void free (void* p) final;
 
    [[nodiscard]] bool isDeviceAccessible () const final;
    [[nodiscard]] bool isHostAccessible () const final;
 
    [[nodiscard]] bool isManaged () const final;
    [[nodiscard]] bool isDevice () const final;
    [[nodiscard]] bool isPinned () const final;
 
#ifdef AMREX_USE_GPU
    [[nodiscard]] bool isStreamOrderedArena () const final { return true; }
    void streamOrderedFree (void* p, gpuStream_t stream) override;
#endif
 
#ifdef AMREX_GPU_STREAM_ALLOC_SUPPORT
private:
    AMREX_HIP_OR_CUDA(
        hipMemPool_t m_pool;,
        cudaMemPool_t m_pool;
    )
    AMREX_HIP_OR_CUDA(
        uint64_t m_old_release_threshold;,
        cuuint64_t m_old_release_threshold;
    )
#endif
};
 
}
#endif