SigSet: A new unsafe helper method to create a SigSet from a sigset_t

Currently,  the only way to create a `SigSet` from a `sigset_t` object
is by using pointer casts, like:

```
unsafe {
    let sigset = *(&sigset as *const libc::sigset_t as *const SigSet)
};
```

This is un-ergonomic for library creators with interfaces to C.
So, let's add a new unsafe method that creates a `SigSet` from a
`libc::sigset_t` object.

We can't implement `From` since converting from `libc::sigset_t` to
`SigSet` is unsafe, because objects of type `libc::sigset_t` must be
initialized by calling either `sigemptyset(3)` or `sigfillset(3)`
before being used. In other case, the results are undefined.
We can't implement `TryFrom` either, because there is no way to check
if an object of type `libc::sigset_t` is initialized.

Signed-off-by: German Maglione <gmaglione@redhat.com>

0 files changed, 0 insertions, 0 deletions