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std::promise::set_value

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void set_value( const R& value );
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<td > (1) </td> <td > (member only of generic promise template)
(since C++11) </td> </tr> <tr class="t-dcl-sep"><td></td><td></td><td></td></tr>

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<td >
void set_value( R&& value );
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<td > (2) </td> <td > (member only of generic promise template)
(since C++11) </td> </tr> <tr class="t-dcl-sep"><td></td><td></td><td></td></tr>

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<td >
void set_value( R& value );
</td>

<td > (3) </td> <td > (member only of promise<R&> template specialization)
(since C++11) </td> </tr> <tr class="t-dcl-sep"><td></td><td></td><td></td></tr>

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void set_value()
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<td > (4) </td> <td > (member only of promise<void> template specialization)
(since C++11) </td> </tr> Template:ddcl list end

Stores the value into the shared state and makes the state ready.

The operation is atomic, i.e. it behaves as though they 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.

Contents

Parameters

value - value to store in the shared state

Return value

(none)

Exceptions

std::future_error on the following conditions:

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

Additionally:

1-2) Any exception thrown by the copy constructor of value
3) Any exception thrown by the move constructor of value

Example

See also

Template:cpp/thread/promise/dcl list set exception