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      std::atomic<T>::operator&=,|=,^=

      From cppreference.com
      <cpp‎ |atomic‎ |atomic
       
       
      Concurrency support library
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      this_thread namespace
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      member only ofatomic<Integral > specializations
      T operator&=( T arg)noexcept;
      		 (1)(since C++11)
      T operator&=( T arg)volatilenoexcept;
      		 (2)(since C++11)
      T operator|=( T arg)noexcept;
      		 (3)(since C++11)
      T operator|=( T arg)volatilenoexcept;
      		 (4)(since C++11)
      T operator^=( T arg)noexcept;
      		 (5)(since C++11)
      T operator^=( T arg)volatilenoexcept;
      		 (6)(since C++11)

      Atomically replaces the current value with the result of computation involving the previous value andarg. The operation is read-modify-write operation.

      • operator&= performs atomic bitwise and. Equivalent toreturn fetch_and(arg)& arg;.
      • operator|= performs atomic bitwise or. Equivalent toreturn fetch_or(arg)| arg;.
      • operator^= performs atomic bitwise exclusive or. Equivalent toreturn fetch_xor(arg)^ arg;.

      It is deprecated ifstd::atomic<T>::is_always_lock_free isfalse and anyvolatile overload participates in overload resolution.

      		(since C++20)

      Contents

      [edit]Parameters

      arg - the argument for the arithmetic operation

      [edit]Return value

      The resulting value (that is, the result of applying the corresponding binary operator to the value immediately preceding the effects of the corresponding member function in themodification order of*this).

      [edit]Notes

      Unlike most compound assignment operators, the compound assignment operators for atomic types do not return a reference to their left-hand arguments. They return a copy of the stored value instead.

      [edit]See also

      atomically performs bitwise AND between the argument and the value of the atomic object and obtains the value held previously
      (public member function)[edit]
      atomically performs bitwise OR between the argument and the value of the atomic object and obtains the value held previously
      (public member function)[edit]
      atomically performs bitwise XOR between the argument and the value of the atomic object and obtains the value held previously
      (public member function)[edit]
      increments or decrements the atomic value by one
      (public member function)[edit]
      adds to or subtracts from the atomic value
      (public member function)[edit]
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