std::packaged_task::get_future

From cppreference.com
 
C++
 
Thread support library
Threads
(C++11)
(C++17)(C++17)
this_thread namespace
(C++11)
(C++11)
(C++11)
(C++11)
Mutual exclusion
(C++11)
(C++11)
(C++17)
Generic lock management
(C++11)
(C++11)
(C++14)
(C++11)(C++11)(C++11)
(C++11)
(C++11)
(C++11)(C++11)(C++11)
(C++11)
(C++11)
Condition variables
(C++11)
(C++11)
(C++11)
(C++11)
Futures
(C++11)
(C++11)
(C++11)
(C++11)
(C++11)
(C++11)
(C++11)
(C++11)
(C++11)
(C++11)
 
std::packaged_task
 
std::future<R> get_future();
 (since C++11)

Returns a future which shares the same shared state as *this.

get_future can be called only once for each packaged_task.

[edit] Parameters

(none)

[edit] Return value

A future which shares the same shared state as *this.

[edit] Exceptions

std::future_error on the following error conditions:

  • The shared state has already been retrieved via a call to get_future. The error category is set to future_already_retrieved.
  • *this has no shared state. The error category is set to no_state.
Retrieved from "http://en.cppreference.com/mwiki/index.php?title=cpp/thread/packaged_task/get_future&oldid=63452"