std::atomic_flag_clear,std::atomic_flag_clear_explicit (3) Linux Manual Page

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)