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分享c – 构造不同的元素时,’std :: allocator :: construct’是否是线程安全的？
c标准是否保证使用std :: allocator构造不同的元素是线程安全的？例如：
// main thread
std::allocator<T> alloc;
auto *p = alloc.allocate(2);
// thread1
alloc.construct(p);
// thread2
alloc.construct(p + 1)
另外,对于不同的元素,std :: allocator :: destroy是否是线程安全的？
谢谢！
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weixin_38090696 2019-09-12
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20.7.9.1 allocator members [allocator.members]
1 Except for the destructor, member functions of the default allocator shall not introduce data races (1.10)
as a result of concurrent calls to those member functions from different threads. Calls to these functions
that allocate or deallocate a particular unit of storage shall occur in a single total order, and each such
deallocation call shall happen before the next allocation (if any) in this order.
所以是的,在std :: allocator< T>上构造和销毁的并发调用.保证是线程安全的.
