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std::atomic_init(3) | C++ Standard Libary | std::atomic_init(3) |
NAME¶
std::atomic_init - std::atomic_init
Synopsis¶
Defined in header <atomic>
template< class T >
(since C++11)
void atomic_init( std::atomic<T>* obj, (deprecated in C++20)
typename std::atomic<T>::value_type desired ) noexcept;
template< class T >
(since C++11)
void atomic_init( volatile std::atomic<T>* obj, (deprecated in
C++20)
typename std::atomic<T>::value_type desired ) noexcept;
Initializes the default-constructed atomic object obj with the value desired.
The
function is not atomic: concurrent access from another thread, even through
an
atomic operation, is a data race.
If obj was not default-constructed, the behavior is undefined.
If this function is called twice on the same obj, the behavior is
undefined.
Parameters¶
obj - pointer to an atomic object to initialize
desired - the value to initialize atomic object with
Return value¶
(none)
Notes¶
This function is provided for compatibility with C. If the
compatibility is not
required, std::atomic may be initialized through their non-default
constructors.
Example¶
This section is incomplete
Reason: no example
Defect reports
The following behavior-changing defect reports were applied retroactively to
previously published C++ standards.
DR Applied to Behavior as published Correct behavior
P0558R1 C++11 exact type match required because T is T is deduced from the
deduced from multiple arguments atomic argument only
See also¶
ATOMIC_VAR_INIT constant initialization of an atomic variable of
static
(C++11)(deprecated in C++20) storage duration
(function macro)
constructor constructs an atomic object
(public member function of std::atomic<T>)
2022.07.31 | http://cppreference.com |