std::promise<R>::set_exception_at_thread_exit

 

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std::promise

Member functions

promise::promise

promise::~promise

promise::operator=

promise::swap

Getting the result

promise::get_future

Setting the result

promise::set_value

promise::set_value_at_thread_exit

promise::set_exception

promise::set_exception_at_thread_exit

Non-member Functions

swap(std::promise)

Helper Classes

uses_allocator<std::promise>

 

void set_exception_at_thread_exit( std::exception_ptr p );		(since C++11)

Stores the exception pointer p into the shared state without making the state ready immediately. The state is made ready when the current thread exits, after all variables with thread-local storage duration have been destroyed.

The operation behaves as though set_value, set_exception, set_value_at_thread_exit, and set_exception_at_thread_exit acquire a single mutex associated with the promise object while updating the promise object.

An exception is thrown if there is no shared state or the shared state already stores a value or exception.

Calls to this function do not introduce data races with calls to get_future (therefore they need not synchronize with each other).

Parameters

p

-

exception pointer to store. The behavior is undefined if p is nullptr

Return value

(none)

Exceptions

std::future_error on the following conditions:

• *this has no shared state. The error code is set to no_state.

• The shared state already stores a value or exception. The error code is set to promise_already_satisfied.

See also

set_exception

sets the result to indicate an exception (public member function)