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std::atomic_load, std::atomic_load_explicit cppreference.com
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std::atomic_load, std::atomic_load_explicit

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template< class T > T atomic_load( std::atomic<T>* obj );
 (1) ( C++11)
template< class T > T atomic_load( volatile std::atomic<T>* obj );
 (2) ( C++11)
template< class T > T atomic_load_explicit( std::atomic<T>* obj, std::memory_order order );
 (3) ( C++11)
template< class T > T atomic_load_explicit( volatile std::atomic<T>* obj, std::memory_order order );
 (4) ( C++11)

1-2)

obj obj->load()
:
Atomically obtains the value pointed to by obj as if by obj->load()
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3-4)

obj obj->load(order)
:
Atomically obtains the value pointed to by obj as if by obj->load(order)
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obj
:
pointer to the atomic object to modify
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order
sycnhronization : std::memory_order_relaxed, std::memory_order_consume, std::memory_order_acquire std::memory_order_seq_cst .
:
the memory sycnhronization ordering for this operation: only std::memory_order_relaxed, std::memory_order_consume, std::memory_order_acquire and std::memory_order_seq_cst are permitted.
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, , obj
:
The value that is held by the atomic object pointed to by obj
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noexcept:  
noexcept
  

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(public - std::atomic) []
(C++11)(C++11)
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 :: shared_ptr
:
specializes atomic operations for std::shared_ptr
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C atomic_load, atomic_load_explicit
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