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# core.atomic

The atomic module provides basic support for lock-free concurrent programming.
License:
Boost License 1.0
Authors:
Sean Kelly, Alex Rønne Petersen

Source: core/atomic.d

pure nothrow @nogc HeadUnshared!T atomicOp(string op, T, V1)(ref shared T val, V1 mod)
if (__traits(compiles, mixin("*cast(T*)&val" ~ op ~ "mod")));
  Performs the binary operation 'op' on val using 'mod' as the modifier.
  Parameters:

  T val | The target variable.
  V1 mod | The modifier to apply.

  Returns:
  The result of the operation.
pure nothrow @nogc bool cas(T, V1, V2)(shared(T)* here, const V1 ifThis, V2 writeThis)
if (!is(T == class) && !is(T U : U*) && __traits(compiles, () { *here = writeThis; } ));
pure nothrow @nogc bool cas(T, V1, V2)(shared(T)* here, const shared(V1) ifThis, shared(V2) writeThis)
if (is(T == class) && __traits(compiles, () { *here = writeThis; } ));
pure nothrow @nogc bool cas(T, V1, V2)(shared(T)* here, const shared(V1)* ifThis, shared(V2)* writeThis)
if (is(T U : U*) && __traits(compiles, () { *here = writeThis; } ));
  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.
  Parameters:

  shared(T)* here | The address of the destination variable.
  V2 writeThis | The value to store.
  V1 ifThis | The comparison value.

  Returns:
  true if the store occurred, false if not.
pure nothrow @nogc HeadUnshared!T atomicLoad(MemoryOrder ms = MemoryOrder.seq, T)(ref const shared T val);
  Loads 'val' from memory and returns it. The memory barrier specified by 'ms' is applied to the operation, which is fully sequenced by default. Valid memory orders are MemoryOrder.raw, MemoryOrder.acq, and MemoryOrder.seq.
  Parameters:

  T val | The target variable.

  Returns:
  The value of 'val'.
pure nothrow @nogc void atomicStore(MemoryOrder ms = MemoryOrder.seq, T, V1)(ref shared T val, V1 newval)
if (__traits(compiles, () { val = newval; } ));
  Writes 'newval' into 'val'. The memory barrier specified by 'ms' is applied to the operation, which is fully sequenced by default. Valid memory orders are MemoryOrder.raw, MemoryOrder.rel, and MemoryOrder.seq.
  Parameters:

  T val | The target variable.
  V1 newval | The value to store.

enum MemoryOrder: int;
  Specifies the memory ordering semantics of an atomic operation.
  raw
    Not sequenced.
  acq
    Hoist-load + hoist-store barrier.
  rel
    Sink-load + sink-store barrier.
  seq
    Fully sequenced (acquire + release).
nothrow @nogc void atomicFence();
  Inserts a full load/store memory fence (on platforms that need it). This ensures that all loads and stores before a call to this function are executed before any loads and stores after the call.

Copyright Sean Kelly 2005 - 2010. | Page generated by Ddoc on Mon Sep 19 09:25:29 2016