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From cppreference.com
synchronized_pool_resource(); (1) (since C++17)explicitsynchronized_pool_resource(std::pmr::memory_resource*upstream); (2) (since C++17)explicitsynchronized_pool_resource(conststd::pmr::pool_options&opts); (3) (since C++17)synchronized_pool_resource(conststd::pmr::pool_options&opts,std::pmr::memory_resource*upstream); (4) (since C++17)synchronized_pool_resource(constsynchronized_pool_resource&)=delete; (5) (since C++17)Constructs a synchronized_pool_resource.
1-4) Constructs a synchronized_pool_resource using the specified upstream memory resource and tuned according to the specified options. The resulting object holds a copy of upstream but does not own the resource to which upstream points.
The overloads not taking opts as a parameter uses a default constructed instance of
as the options. The overloads not taking upstream as a parameter uses the return value of
std::pmr::get_default_resource
as the upstream memory resource.
5) Copy constructor is deleted.
Parameters
opts - a
struct containing the constructor options upstream - the upstream memory resource to use Exceptions
1-4) Throws only if a call to the allocate() function of the upstream resource throws. It is unspecified if or under what conditions such a call takes place.