[stopsource.inplace]

# 32 Concurrency support library [[thread]](./#thread)

## 32.3 Stop tokens [[thread.stoptoken]](thread.stoptoken#stopsource.inplace)

### 32.3.9 Class inplace_stop_source [stopsource.inplace]

#### [32.3.9.1](#general) General [[stopsource.inplace.general]](stopsource.inplace.general)

[1](#general-1)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/threads.tex#L1241)

The class inplace_stop_source models [*stoppable-source*](stoptoken.concepts#concept:stoppable-source "32.3.3 Stop token concepts [stoptoken.concepts]")[.](#general-1.sentence-1)

namespace std {class inplace_stop_source {public:// [[stopsource.inplace.cons]](#cons "32.3.9.2 Constructors"), constructorsconstexpr inplace_stop_source() noexcept;

 inplace_stop_source(inplace_stop_source&&) = delete;
 inplace_stop_source(const inplace_stop_source&) = delete;
 inplace_stop_source& operator=(inplace_stop_source&&) = delete;
 inplace_stop_source& operator=(const inplace_stop_source&) = delete; ~inplace_stop_source(); // [[stopsource.inplace.mem]](#mem "32.3.9.3 Member functions"), stop handlingconstexpr inplace_stop_token get_token() const noexcept; static constexpr bool stop_possible() noexcept { return true; }bool stop_requested() const noexcept; bool request_stop() noexcept; };}

#### [32.3.9.2](#cons) Constructors [[stopsource.inplace.cons]](stopsource.inplace.cons)

[🔗](#cons-itemdecl:1)

`constexpr inplace_stop_source() noexcept;
`

[1](#cons-1)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/threads.tex#L1273)

*Effects*: Initializes a new stop state inside *this[.](#cons-1.sentence-1)

[2](#cons-2)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/threads.tex#L1277)

*Postconditions*: stop_requested() is false[.](#cons-2.sentence-1)

#### [32.3.9.3](#mem) Member functions [[stopsource.inplace.mem]](stopsource.inplace.mem)

[🔗](#mem-itemdecl:1)

`constexpr inplace_stop_token get_token() const noexcept;
`

[1](#mem-1)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/threads.tex#L1289)

*Returns*: A new associated inplace_stop_token object
whose *stop-source* member is equal to this[.](#mem-1.sentence-1)

[🔗](#mem-itemdecl:2)

`bool stop_requested() const noexcept;
`

[2](#mem-2)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/threads.tex#L1300)

*Returns*: true if the stop state inside *this has received a stop request; otherwise, false[.](#mem-2.sentence-1)

[🔗](#mem-itemdecl:3)

`bool request_stop() noexcept;
`

[3](#mem-3)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/threads.tex#L1311)

*Effects*: Executes a stop request operation ([[stoptoken.concepts]](stoptoken.concepts "32.3.3 Stop token concepts"))[.](#mem-3.sentence-1)

[4](#mem-4)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/threads.tex#L1315)

*Postconditions*: stop_requested() is true[.](#mem-4.sentence-1)