#ERROR INITIALIZING ASIO BUFFERS REAPER FREE#

Io::async_write(socket, const_sequence(first, second, io::buffer(pointer, size)), handler) ДЄll I/O functions operating on data support both types of data view: a single buffer view and a buffer sequence. We could use helper facilities for composing such sequences with C++17: template Straightforward construction of such array looks a bit clumsy. Io::async_write(socket, sequence, handler) Now we can pass this sequence into I/O function: Let's say we want to compose a const buffer sequence which consist of std::string, char array and a pair of pointer and size: std::string first = 'Hello Boost.Asio!' However usually a length of such sequence is know during the compile time, and the better way is to use std::array for such sequence. A buffer sequence is any iterable range of Boost.Asio buffer views. If you need to pass it into some function as a single buffer view then you will have to copy this parts into some additional buffer so the whole message could be presented as a solid memory block.ДЄ buffer sequence is used to cover such a need and avoid unnecessary copying. Assume that some message happened to be cut in two pieces: first piece is located at the end of the buffer, and the second piece is located at the beginning. For example, assume you're using some sort of cyclic buffer which you're filling sequentially with byte representation of messages pending to be sent, and when you reach the end of the buffer, you continue to fill it from the beginning. It's a normal thing when you need to send some data which is scattered across different places in memory. The second parameter of async_write in the example above is not just a buffer view, but a sequence of such views. void* or void const*, depending on if the view is const or mutable Since in C++ we like to keep every byte under control, you can access data pointer and size of a given buffer view with its member functions: auto view = io::buffer(.) The second one allows you to modify the data it points to and it used when you receive a data. The first one is read-only view and used when you send a data. There are two types of buffer views: io::const_buffer and io::mutable_buffer. Therefore, that memory block must stay alive as long as the buffer view is in use. Buffer view doesn't own the memory but just hold the pointer and the size of the memory block.

#ERROR INITIALIZING ASIO BUFFERS REAPER FREE#

Take a closer look at this part: io::buffer(ont())Д«oost::asio::buffer is a free function which constructs a buffer view from a given parameters. Self->on_write(error, bytes_transferred) Let's see once again how did we send messages in TCP chat server: io::async_write(socket, io::buffer(ont()), (error_code error, std::size_t bytes_transferred)

Error initializing asio buffers reaper