A handler must meet the requirements of CopyConstructible
types (C++ Std, 20.1.3).
In the table below, X
denotes
a handler class, h
denotes
a value of X
, p
denotes a pointer to a block of allocated
memory of type void*
,
s
denotes the size for a
block of allocated memory, and f
denotes a function object taking no arguments.
Table 13. Handler requirements
expression |
return type |
assertion/note |
---|---|---|
using asio::asio_handler_allocate; asio_handler_allocate(s, &h);
|
|
Returns a pointer to a block of memory of size |
using asio::asio_handler_deallocate; asio_handler_deallocate(p, s, &h);
|
Frees a block of memory associated with a pointer |
|
using asio::asio_handler_invoke; asio_handler_invoke(f, &h);
|
Causes the function object |