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Submits a completion token or function object for execution.
template< typename NullaryToken> auto post( NullaryToken && token);
This function submits an object for execution using the object's associated
executor. The function object is queued for execution, and is never called
from the current thread prior to returning from post().
The use of post(),
rather than defer,
indicates the caller's preference that the function object be eagerly queued
for execution.
The completion token that will be used to produce a completion handler. The function signature of the completion handler must be:
void handler();
This function returns async_initiate<NullaryToken, void()>(Init{}, token),
where Init is a function
object type defined as:
class Init { public: template <typename CompletionHandler> void operator()(CompletionHandler&& completion_handler) const; };
The function call operator of Init:
Obtains the handler's associated executor object ex
of type Ex by performing
auto ex = get_associated_executor(handler);
Obtains the handler's associated allocator object alloc
by performing
auto alloc = get_associated_allocator(handler);
If execution::is_executor<Ex>::value is true, performs
prefer( require(ex, execution::blocking.never), execution::relationship.fork, execution::allocator(alloc) ).execute(std::forward<CompletionHandler>(completion_handler));
If execution::is_executor<Ex>::value is false, performs
ex.post( std::forward<CompletionHandler>(completion_handler), alloc);
void()