83. Smart Pointers-II

Question.5

A developer needs to pass a unique_ptr-managed buffer to a C function:

auto buf = std::make_unique<uint8_t[]>(64);
hal_uart_transmit(buf.get(), 64);  // C function: void hal_uart_transmit(uint8_t*, int)

Is buf.get() the correct way to pass it?

Need Help? Refer to the Quick Guide below

No -- unique_ptr cannot interop with C functions
Yes -- get() returns the raw pointer without transferring ownership; the C function uses it and unique_ptr still manages the memory
Yes -- but buf is invalidated after the call
No -- use release() instead

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