StdAllocator.h

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#pragma once

#include "open3d/core/Device.h"
#include "open3d/core/MemoryManager.h"

namespace open3d {
namespace core {

template <typename T>
class StdAllocator {
public:
    using value_type = T;

    StdAllocator() = default;

    explicit StdAllocator(const Device& device) : device_(device) {}

    StdAllocator(const StdAllocator&) = default;

    StdAllocator& operator=(const StdAllocator&) = default;

    StdAllocator(StdAllocator&&) = default;

    StdAllocator& operator=(StdAllocator&&) = default;

    template <typename U>
    StdAllocator(const StdAllocator<U>& other) : device_(other.device_) {}

    T* allocate(std::size_t n) {
        return static_cast<T*>(MemoryManager::Malloc(n * sizeof(T), device_));
    }

    void deallocate(T* p, std::size_t n) { MemoryManager::Free(p, device_); }

    bool operator==(const StdAllocator& other) const {
        return device_ == other.device_;
    }

    bool operator!=(const StdAllocator& other) const {
        return !operator==(other);
    }

    Device GetDevice() const { return device_; }

private:
    // Allow access in rebind constructor.
    template <typename T2>
    friend class StdAllocator;

    Device device_;
};

}  // namespace core
}  // namespace open3d