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std::atomic::fetch_sub

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< cpp‎ | atomic‎ | atomic

 
 
Operaciones de biblioteca Atómica
Tipos
Original:
Types
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atomic(C++11)
atomic_is_lock_free(C++11)
Funciones
Original:
Functions
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atomic_store
atomic_store_explicit
(C++11)
(C++11)
atomic_load
atomic_load_explicit
(C++11)
(C++11)
atomic_exchange
atomic_exchange_explicit
(C++11)
(C++11)
atomic_compare_exchange_weak
atomic_compare_exchange_weak_explicit
atomic_compare_exchange_strong
atomic_compare_exchange_strong_explicit
(C++11)
(C++11)
(C++11)
(C++11)
atomic_fetch_add
atomic_fetch_add_explicit
(C++11)
(C++11)
atomic_fetch_sub
atomic_fetch_sub_explicit
(C++11)
(C++11)
atomic_fetch_and
atomic_fetch_and_explicit
(C++11)
(C++11)
atomic_fetch_or
atomic_fetch_or_explicit
(C++11)
(C++11)
atomic_fetch_xor
atomic_fetch_xor_explicit
(C++11)
(C++11)
Banderas atómicas
Original:
Atomic flags
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atomic_flag(C++11)
atomic_flag_test_and_set
atomic_flag_test_and_set_explicit
(C++11)
(C++11)
atomic_flag_clear
atomic_flag_clear_explicit
(C++11)
(C++11)
Inicialización
Original:
Initialization
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atomic_init(C++11)
ATOMIC_VAR_INIT(C++11)
ATOMIC_FLAG_INIT(C++11)
Memoria pedido
Original:
Memory ordering
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memory_order(C++11)
kill_dependency(C++11)
atomic_thread_fence(C++11)
atomic_signal_fence(C++11)
 
std::atomic
Las funciones miembro
Original:
Member functions
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atomic::atomic
atomic::operator=
atomic::is_lock_free
atomic::store
atomic::load
atomic::operator T
atomic::exchange
atomic::compare_exchange
Funciones especializadas miembros
Original:
Specialized member functions
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atomic::fetch_add
atomic::fetch_sub
atomic::fetch_and
atomic::fetch_or
atomic::fetch_xor
atomic::operator++
atomic::operator++(int)
atomic::operator--
atomic::operator--(int)
atomic::operator+=
atomic::operator-=
atomic::operator&=
atomic::operator|=
atomic::operator^=
 
T fetch_sub( T arg,

             memory_order = std::memory_order_seq_cst );
T fetch_sub( T arg,

             memory_order = std::memory_order_seq_cst ) volatile;
(único miembro de especialización de plantilla atomic<Integral>)
(desde C++11)
T* fetch_sub( std::ptrdiff_t arg,

              memory_order = std::memory_order_seq_cst );
T* fetch_sub( std::ptrdiff_t arg,

              memory_order = std::memory_order_seq_cst ) volatile;
(único miembro de especialización de plantilla atomic<T*>)
(desde C++11)
Atómicamente sustituye el valor actual con el resultado de la resta aritmética del valor y arg. La operación es de lectura-modificación-escritura de la operación. Memoria se ve afectada de acuerdo con el valor de memory_order .
Original:
Atomically replaces the current value with the result of arithmetic subtraction of the value and arg. The operation is read-modify-write operation. Memory is affected according to the value of memory_order.
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Para los tipos de Integral firmados, la aritmética se define para utilizar la representación complementaria de dos. Ya está
Original:
For signed Integral types, arithmetic is defined to use two’s complement representation. There
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hay resultados no definidos. Para los tipos de T*, el resultado puede ser una dirección definida, pero las operaciones de otro modo no tienen un comportamiento no definido .
Original:
are no undefined results. For T* types, the result may be an undefined address, but the operations otherwise have no undefined behavior.
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Contenido

[editar] Parámetros

arg -
el otro argumento de la aritmética de la resta
Original:
the other argument of arithmetic subtraction
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memory_order -
restricciones de memoria el orden de hacer cumplir
Original:
memory order constraints to enforce
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[editar] Valor de retorno

El valor de la variable atómica antes de la llamada .
Original:
The value of the atomic variable before the call.
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[editar] Excepciones

noexcept specification:  
noexcept
  (desde C++11)

[editar] Ver también

resta un valor no atómico de un objeto atómico y obtiene el valor anterior de la atómica
Original:
subtracts a non-atomic value from an atomic object and obtains the previous value of the atomic
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(función de plantilla) [edit]