FreeBSD Manual Pages
std::atomic_ref::fetch_sub(3) C++ Standard Libarystd::atomic_ref::fetch_sub(3) NAME std::atomic_ref::fetch_sub - std::atomic_ref::fetch_sub Synopsis member only of atomic_ref<Integral> and atomic_ref<Floating> template specializations T fetch_sub( T arg, std::memory_order order = std::memory_order_seq_cst ) (1) (since C++20) const noexcept; member only of atomic_ref<T*> template specialization T* fetch_sub( std::ptrdiff_t arg, std::memory_order order = std::memory_order_seq_cst (2) (since C++20) ) const noexcept; Atomically replaces the current value of the referenced object with the result of arithmetic subtraction of the value and arg. This operation is a read-modify-write operation. Memory is affected according to the value of order. For signed integral types, arithmetic is defined to use twos comple- ment representation. There are no undefined results. For floating-point types, the floating-point environment in effect may be different from the calling thread's floating-point environment. The operation need not be conform to the corresponding std::numeric_limits traits but is en- couraged to do so. If the result is not a representable value for its type, the result is unspecified but the operation otherwise has no undefined behavior. For T* types, the result may be an undefined address, but the opera- tion otherwise has no undefined behavior. The program is ill-formed if T is not an object type. Parameters arg - the other argument of arithmetic subtraction order - memory order constraints to enforce Return value The value of the referenced object, immediately preceding the ef- fects of this function. Example This section is incomplete Reason: no example Category: * Todo no example http://cppreference.com 2024.06.10 std::atomic_ref::fetch_sub(3)
NAME | Synopsis | Parameters | Return value | Example | Category:
Want to link to this manual page? Use this URL:
<https://man.freebsd.org/cgi/man.cgi?query=std::atomic_ref::fetch_sub&sektion=3&manpath=FreeBSD+Ports+15.1.quarterly>