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Sets the non-blocking mode of the native descriptor implementation.
void native_non_blocking( bool mode);
This function is used to modify the non-blocking mode of the underlying native descriptor. It has no effect on the behaviour of the descriptor object's synchronous operations.
If true, the underlying
descriptor is put into non-blocking mode and direct system calls
may fail with asio::error::would_block
(or the equivalent system error).
Thrown on failure. If the mode
is false, but the
current value of non_blocking() is true,
this function fails with asio::error::invalid_argument,
as the combination does not make sense.