Boost C++ Libraries

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write_at (4 of 6 overloads)

Write all of the supplied data at the specified offset before returning.

template<
    typename SyncRandomAccessWriteDevice,
    typename Allocator>
std::size_t write_at(
    SyncRandomAccessWriteDevice & d,
    boost::uint64_t offset,
    basic_streambuf< Allocator > & b);

This function is used to write a certain number of bytes of data to a random access device at a specified offset. The call will block until one of the following conditions is true:

This operation is implemented in terms of zero or more calls to the device's write_some_at function.

Parameters

d

The device to which the data is to be written. The type must support the SyncRandomAccessWriteDevice concept.

offset

The offset at which the data will be written.

b

The basic_streambuf object from which data will be written.

Return Value

The number of bytes transferred.

Exceptions

boost::system::system_error

Thrown on failure.

Remarks

This overload is equivalent to calling:

boost::asio::write_at(
    d, 42, b,
    boost::asio::transfer_all()); 

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