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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 |