cl_alloc_linear.hpp

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#ifndef SPLA_CL_ALLOC_LINEAR_HPP
#define SPLA_CL_ALLOC_LINEAR_HPP
 
#include <opencl/cl_accelerator.hpp>
#include <opencl/cl_alloc.hpp>
 
#include <svector.hpp>
 
namespace spla {
 
    class CLAllocLinear : public CLAlloc {
    public:
        static constexpr const uint DEFAULT_SIZE      = 1024 * 1024;// 1 MiB
        static constexpr const uint DEFAULT_ALIGNMENT = 128;
 
        explicit CLAllocLinear(std::size_t arena_size = DEFAULT_SIZE, std::size_t alignment = DEFAULT_ALIGNMENT);
        ~CLAllocLinear() override = default;
 
        cl::Buffer alloc(std::size_t size) override;
        void       free(cl::Buffer buffer) override;
        void       free_all() override;
 
    protected:
        void expand();
        void shrink();
 
    private:
        ankerl::svector<cl::Buffer, 4> m_arena;
        std::size_t                    m_alignment       = 128;
        std::size_t                    m_curr_offset     = 0;
        std::size_t                    m_total_allocated = 0;
        std::size_t                    m_arena_size      = 0;
        std::size_t                    m_fallback_size   = 0;
    };
 
}// namespace spla
 
#endif//SPLA_CL_ALLOC_LINEAR_HPP