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std::atomic_fetch_or, std::atomic_fetch_or_explicit

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Defined in header <atomic>
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<td >
template< class Integral >
Integral atomic_fetch_or( std::atomic<Integral>* obj, Integral arg );
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<td > (1) </td> <td > (since C++11) </td> </tr> <tr class="t-dcl ">

<td >
template< class Integral >
Integral atomic_fetch_or( volatile std::atomic<Integral>* obj, Integral arg );
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<td > (2) </td> <td > (since C++11) </td> </tr> <tr class="t-dcl ">

<td >
template< class Integral >

Integral atomic_fetch_or_explicit( std::atomic<Integral>* obj, Integral arg,

                                   std::memory_order order );
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<td > (3) </td> <td > (since C++11) </td> </tr> <tr class="t-dcl ">

<td >
template< class Integral >

Integral atomic_fetch_or_explicit( volatile std::atomic<Integral>* obj, Integral arg,

                                   std::memory_order order );
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<td > (4) </td> <td > (since C++11) </td> </tr> Template:ddcl list end

1-2) Atomically replaces the value pointed by arg with the result of bitwise OR between the old value of obj and arg, and returns the value obj held previously, as if by obj->fetch_and(arg)

3-4) Atomically replaces the value pointed by arg with the result of bitwise OR between the old value of obj and arg, and returns the value obj held previously, as if by obj->fetch_and(arg, order)

Contents

Parameters

obj - pointer to the atomic object to modify
arg - the value to bitwise OR to the value stored in the atomic object
order - the memory sycnhronization ordering for this operation: all values are permitted.

Return value

The value held previously by the atomic object pointed to by obj

Exceptions

noexcept specification:  
noexcept
  

Possible implementation

template< class T >
typename std::enable_if<std::is_integral<T>::value && !std::is_same<T, bool>::value, T>::type
atomic_fetch_or( std::atomic<T>* obj, T arg );
{
    return obj->fetch_or(arg);
}

Example

See also

Template:cpp/atomic/atomic/dcl list fetch orTemplate:cpp/atomic/dcl list atomic fetch andTemplate:cpp/atomic/dcl list atomic fetch xor
C documentation for atomic_fetch_or, atomic_fetch_or_explicit