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use rustix::fs::SealFlags;
use std::collections::HashSet;
pub type SealsHashSet = HashSet<FileSeal>;
#[derive(Clone, Copy, Debug, Eq, Hash, PartialEq)]
pub enum FileSeal {
SealShrink,
SealGrow,
SealWrite,
SealSeal,
#[cfg(any(target_os = "android", target_os = "linux"))]
SealFutureWrite,
}
impl FileSeal {
pub(crate) const fn bitflags(self) -> SealFlags {
match self {
Self::SealSeal => SealFlags::SEAL,
Self::SealShrink => SealFlags::SHRINK,
Self::SealGrow => SealFlags::GROW,
Self::SealWrite => SealFlags::WRITE,
#[cfg(any(target_os = "android", target_os = "linux"))]
Self::SealFutureWrite => SealFlags::FUTURE_WRITE,
}
}
}
pub(crate) fn seals_to_bitflags<'a>(seals: impl IntoIterator<Item = &'a FileSeal>) -> SealFlags {
let mut bits = SealFlags::empty();
for seal in seals {
bits |= seal.bitflags();
}
bits
}
pub(crate) fn bitflags_to_seals(bitflags: SealFlags) -> SealsHashSet {
let mut sset = SealsHashSet::new();
if bitflags.contains(SealFlags::SEAL) {
sset.insert(FileSeal::SealSeal);
}
if bitflags.contains(SealFlags::SHRINK) {
sset.insert(FileSeal::SealShrink);
}
if bitflags.contains(SealFlags::GROW) {
sset.insert(FileSeal::SealGrow);
}
if bitflags.contains(SealFlags::WRITE) {
sset.insert(FileSeal::SealWrite);
}
#[cfg(any(target_os = "android", target_os = "linux"))]
if bitflags.contains(SealFlags::FUTURE_WRITE) {
sset.insert(FileSeal::SealFutureWrite);
}
sset
}