std::atomic_flag_clear,std::atomic_flag_clear_explicit (3) - Linux Manuals

std::atomic_flag_clear,std::atomic_flag_clear_explicit: std::atomic_flag_clear,std::atomic_flag_clear_explicit

NAME

std::atomic_flag_clear,std::atomic_flag_clear_explicit - std::atomic_flag_clear,std::atomic_flag_clear_explicit

Synopsis


Defined in header <atomic>
void atomic_flag_clear( volatile std::atomic_flag* p ) noexcept;
void atomic_flag_clear( std::atomic_flag* p ) noexcept;
void atomic_flag_clear_explicit( volatile std::atomic_flag* p, (1) (since C++11)
std::memory_order order ) noexcept; (2) (since C++11)
void atomic_flag_clear_explicit( std::atomic_flag* p,
std::memory_order order ) noexcept;


Atomically changes the state of a std::atomic_flag pointed to by p to clear (false).

Parameters


p - pointer to std::atomic_flag to access
order - the memory synchronization ordering for this operation: only std::memory_order_relaxed, std::memory_order_release, or std::memory_order_seq_cst are permitted.

Return value


none.

Possible implementation

First version


  void atomic_flag_clear(volatile std::atomic_flag* p)
  {
      p->clear();
  }

Second version


  void atomic_flag_clear(std::atomic_flag* p)
  {
      p->clear();
  }


Third version


  void atomic_flag_clear_explicit(volatile std::atomic_flag* p,
                                  std::memory_order order)
  {
      p->clear(order);
  }


Fourth version


  void atomic_flag_clear_explicit(std::atomic_flag* p,
                                  std::memory_order order)
  {
      p->clear(order);
  }

See also


atomic_flag the lock-free boolean atomic type
                                  (class)
(C++11)


atomic_flag_test_and_set
atomic_flag_test_and_set_explicit atomically sets the flag to true and returns its previous value
                                  (function)
(C++11)
(C++11)


memory_order defines memory ordering constraints for the given atomic operation
                                  (enum)
(C++11)