Template:ddcl list begin <tr class="t-dsc-header"><td>
<td></td> <td></td> <tr class="t-dcl "><td >
<td > (1) </td> <td > (since C++11) </td> </tr> <tr class="t-dcl "><td >
<td > (2) </td> <td > (since C++11) </td> </tr> Template:ddcl list end
Constructs a new std::atomic_flag.
1) Trivial default constructor, initializes std::atomic_flag to unspecified state.
2) The copy constructor is deleted; std::atomic_flag is not copyable.
In addition, std::atomic_flag can be value-initialized to clear state with the expression ATOMIC_FLAG_INIT. For an atomic_flag with static storage duration, this guarantees that the values of this flag is known before any constructors are run for static objects.
|arg||-||the result of ATOMIC_FLAG_INIT|