RetroSearch Browse

Home - News ( United States | United Kingdom | Italy | Germany ) - Football scores

Showing content from https://cplusplus.com/reference/future/promise/set_value_at_thread_exit/ below:

public member function

std::promise::set_value_at_thread_exit generic template (1)

void set_value_at_thread_exit (const T& val);void set_value_at_thread_exit (T&& val);

specializations (2)

void promise<R&>::set_value_at_thread_exit (R& val);     // when T is a reference type (R&)void promise<void>::set_value_at_thread_exit (void);     // when T is void

Set value at thread exit

Stores val as the value in the shared state without making it ready immediately. Instead, it will be made ready automatically at thread exit, once all objects of thread storage duration have been destroyed.

If a future object that is associated to the same shared state is waiting on a call to future::get, it stays blocked until the thread ends. Once the thread ends, it unblocks and returns val.

Notice that calling this function already sets the value in the shared state, and any call that attempts to modify this value between this call and the end of the thread will throw future_error with promise_already_satisfied as error condition.

Parameters

val: The value for the shared state.

Return value none

Data races The promise object is modified.
The shared state is modified as an atomic operation (causing no data races), with synchronization happening at thread end.

Exception safetyBasic guarantee: if an exception is thrown, the promise object is in a valid state.

This member function throws an exception on the following conditions:

This member function also throws if the constructor selected to copy/move val throws (for (1)) and -depending on the library implementation- may also throw to report other situations.

See also

promise::set_value: Set value (public member function)

promise::set_exception_at_thread_exit: Set exception at thread exit (public member function)

future::get: Get value (public member function)

RetroSearch is an open source project built by @garambo | Open a GitHub Issue

Search and Browse the WWW like it's 1997 | Search results from DuckDuckGo

HTML: 3.2 | Encoding: UTF-8 | Version: 0.7.4