std::atomic<T*>
::operator--
Atomically decrement the value stored in *this using standard pointer arithmetic rules and return the old value.
*this
T* operator--(int) volatile;
this->fetch_sub(1,std::memory_order_seq_cst).
this->fetch_sub(1,std::memory_order_seq_cst)
Nothing.
#include <atomic>
fetch_add
std::memory_order
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