Namespaces
Variants
Views
Actions

std::packaged_task::operator()

From cppreference.com
< cpp‎ | thread‎ | packaged task
Revision as of 06:23, 7 March 2013 by 203.219.98.211 (Talk)

void operator()( ArgTypes... args );
(since C++11)

Calls the stored task with args as the arguments. The return value of the task or any exceptions thrown are stored in the shared state. The shared state is made ready and any threads waiting for this are unblocked.

Contents

Parameters

args - the parameters to pass on invocation of the stored task

Return value

(none)

Exceptions

std::future_error on the following error conditions:

  • The stored task has already been invoked. The error category is set to promise_already_satisfied.
  • *this has no shared state. The error category is set to no_state.

Notes

A successful call to operator() synchronizes with a call to any member function of a std::future or std::shared_future that share their shared state with *this.

Example

See also

Template:cpp/thread/packaged task/dcl list make ready at thread exit