33 lines
1.2 KiB
Markdown
33 lines
1.2 KiB
Markdown
[execpol.unseq]
|
||
|
||
# 26 Algorithms library [[algorithms]](./#algorithms)
|
||
|
||
## 26.3 Parallel algorithms [[algorithms.parallel]](algorithms.parallel#execpol.unseq)
|
||
|
||
### 26.3.6 Execution policies [[execpol]](execpol#unseq)
|
||
|
||
#### 26.3.6.6 Unsequenced execution policy [execpol.unseq]
|
||
|
||
[ð](#lib:execution::unsequenced_policy)
|
||
|
||
`class execution::unsequenced_policy { unspecified };
|
||
`
|
||
|
||
[1](#1)
|
||
|
||
[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/algorithms.tex#L765)
|
||
|
||
The class unsequenced_policy is an execution policy type
|
||
used as a unique type to disambiguate parallel algorithm overloading and
|
||
indicate that a parallel algorithm's execution may be vectorized,
|
||
e.g., executed on a single thread using instructions
|
||
that operate on multiple data items[.](#1.sentence-1)
|
||
|
||
[2](#2)
|
||
|
||
[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/algorithms.tex#L772)
|
||
|
||
During the execution of a parallel algorithm with
|
||
the execution::unsequenced_policy policy,
|
||
if the invocation of an element access function exits via an exception,terminate is invoked ([[except.terminate]](except.terminate "14.6.2 The std::terminate function"))[.](#2.sentence-1)
|