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Returns a mutable buffer sequence representing writable bytes.
mutable_buffers_type prepare( std::size_t n);
Returns a mutable buffer sequence representing the writable bytes containing
exactly n bytes of storage.
This function does not allocate memory. Instead, the storage comes from
the underlying mutable buffer sequence. All buffer sequences previously
obtained using buffers_adaptor::prepare are invalidated. Buffer
sequences previously obtained using buffers_adaptor::data remain valid.
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Description |
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The desired number of bytes in the returned buffer sequence. |
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Type |
Thrown On |
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if |
Strong guarantee.