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std::pmr::set_default_resource

STD：：PMR：：SET[医]违约[医]资源

Defined in header ​​
std::pmr::memory_resource* set_default_resource(std::pmr::memory_resource* r​(since C++17)

如果r为NOTNULL，则将默认内存资源指针设置为r否则，将默认内存资源指针设置为std::pmr::new_delete_resource...

大默认内存资源指针当未提供显式内存资源时，某些设施使用。的返回值为初始默认内存资源指针。std::pmr::new_delete_resource...

这个函数是线程安全的.。每一次呼叫std::pmr::set_default_resource与...同步28%见std::memory_order%29std::pmr::set_default_resource和std::pmr::get_default_resource打电话。

返回值

返回默认内存资源指针的前一个值。

例外

noexcept规格：

noexcept

另见

get_default_resource (C++17)gets the default std::pmr::memory_resource (function)
new_delete_resource (C++17)returns a static program-wide std::pmr::memory_resource that uses the global operator new and operator delete to allocate and deallocate memory (function)

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http：//en.cppreference.com/w/cpp/Memory/set[医]违约[医]资源

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