NAME¶

std::sig_atomic_t - std::sig_atomic_t

Synopsis¶

Defined in header <csignal>
typedef /* unspecified */ sig_atomic_t;

An integer type which can be accessed as an atomic entity even in the presence of
asynchronous interrupts made by signals.

Notes¶

Until C++11, which introduced std::atomic and std::atomic_signal_fence, about the
only thing a strictly conforming program could do in a signal handler was to assign
a value to a volatile static std::sig_atomic_t variable and promptly return.

See also¶

signal sets a signal handler for particular signal
(function)
atomic_signal_fence fence between a thread and a signal handler executed in the same
(C++11) thread
(function)
C documentation for
sig_atomic_t