Defined in header <atomic> | ||
---|---|---|
#define ATOMIC_VAR_INIT(value) /* implementation-defined */ |
Expands to an expression which can be used to initialize an std::atomic
object that can be initialized from value
. If the atomic object has static storage duration, this initialization is constant initialization.
Notes
Accessing the variable during initialization from another thread, even through an atomic operation, is a data race (it may happen if the address is immediately passed to another thread with a std::memory_order_relaxed
operation).
This macro is primarily provided for compatibility with C; it behaves the same as the constructor of std::atomic
.
Example
See also
(C++11) | non-atomic initialization of a default-constructed atomic object (function template) |
constructs an atomic object (public member function of std::atomic ) |
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