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version 2.090.0

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core.atomic.cas - multiple declarations

Function cas

Stores 'writeThis' to the memory referenced by 'here' if the value referenced by 'here' is equal to 'ifThis'. This operation is both lock-free and atomic.

bool cas(MemoryOrder succ = MemoryOrder.seq, MemoryOrder fail = MemoryOrder.seq, T, V1, V2) (
  T* here,
  V1 ifThis,
  V2 writeThis
) pure nothrow @nogc @trusted
if (!is(T == shared) && is(T : V1));

bool cas(MemoryOrder succ = MemoryOrder.seq, MemoryOrder fail = MemoryOrder.seq, T, V1, V2) (
  shared(T)* here,
  V1 ifThis,
  V2 writeThis
) pure nothrow @nogc @trusted
if (!is(T == class) && (is(T : V1) || is(shared(T) : V1)));

bool cas(MemoryOrder succ = MemoryOrder.seq, MemoryOrder fail = MemoryOrder.seq, T, V1, V2) (
  shared(T)* here,
  shared(V1) ifThis,
  shared(V2) writeThis
) pure nothrow @nogc @trusted
if (is(T == class));

Parameters

NameDescription
here The address of the destination variable.
writeThis The value to store.
ifThis The comparison value.

Returns

true if the store occurred, false if not.

Function cas

Stores 'writeThis' to the memory referenced by 'here' if the value referenced by 'here' is equal to the value referenced by 'ifThis'. The prior value referenced by 'here' is written to ifThis and returned to the user. This operation is both lock-free and atomic.

bool cas(MemoryOrder succ = MemoryOrder.seq, MemoryOrder fail = MemoryOrder.seq, T, V) (
  T* here,
  T* ifThis,
  V writeThis
) pure nothrow @nogc @trusted
if (!is(T == shared) && !is(V == shared));

bool cas(MemoryOrder succ = MemoryOrder.seq, MemoryOrder fail = MemoryOrder.seq, T, V1, V2) (
  shared(T)* here,
  V1* ifThis,
  V2 writeThis
) pure nothrow @nogc @trusted
if (!is(T == class) && (is(T : V1) || is(shared(T) : V1)));

bool cas(MemoryOrder succ = MemoryOrder.seq, MemoryOrder fail = MemoryOrder.seq, T, V) (
  shared(T)* here,
  shared(T)* ifThis,
  shared(V) writeThis
) pure nothrow @nogc @trusted
if (is(T == class));

Parameters

NameDescription
here The address of the destination variable.
writeThis The value to store.
ifThis The address of the value to compare, and receives the prior value of here as output.

Returns

true if the store occurred, false if not.

Authors

Sean Kelly, Alex Rønne Petersen, Manu Evans

License

Boost License 1.0