##### cppreference.com

##### Search

Create account

##### Namespaces

- Page
- Discussion

##### Variants

##### Views

- View
- Edit
- History

##### Actions

# atomic_signal_fence

From cppreference.com
< c‎ | atomic

Defined in header `<stdatomic.h>` |  |
void atomic_signal_fence( memory_order order ); |  | (since C11)

Establishes memory synchronization ordering of non-atomic and relaxed atomic accesses, as instructed by `order`, between a thread and a signal handler executed on the same thread. This is equivalent to atomic_thread_fence, except no CPU instructions for memory ordering are issued. Only reordering of the instructions by the compiler is suppressed as `order` instructs. For example, a fence with release semantics prevents reads or writes from being moved past subsequent writes and a fence with acquire semantics prevents reads or writes from being moved ahead of preceding reads.

### [edit] Parameters

order | - | the memory ordering executed by this fence

### [edit] Return value

(none)

### [edit] References

- C11 standard (ISO/IEC 9899:2011):

  - 7.17.4.2 The atomic_signal_fence function (p: 279)

### [edit] See also

atomic_thread_fence (C11) | generic memory order-dependent fence synchronization primitive (function) [edit]
C++ documentation for atomic_signal_fence

Retrieved from "http://en.cppreference.com/mwiki/index.php?title=c/atomic/atomic_signal_fence&oldid=88729"