rustix/backend/libc/mm/types.rs
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use crate::backend::c;
use bitflags::bitflags;
bitflags! {
/// `PROT_*` flags for use with [`mmap`].
///
/// For `PROT_NONE`, use `ProtFlags::empty()`.
///
/// [`mmap`]: crate::mm::mmap
#[repr(transparent)]
#[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
pub struct ProtFlags: u32 {
/// `PROT_READ`
const READ = bitcast!(c::PROT_READ);
/// `PROT_WRITE`
const WRITE = bitcast!(c::PROT_WRITE);
/// `PROT_EXEC`
const EXEC = bitcast!(c::PROT_EXEC);
/// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
const _ = !0;
}
}
bitflags! {
/// `PROT_*` flags for use with [`mprotect`].
///
/// For `PROT_NONE`, use `MprotectFlags::empty()`.
///
/// [`mprotect`]: crate::mm::mprotect
#[repr(transparent)]
#[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
pub struct MprotectFlags: u32 {
/// `PROT_READ`
const READ = bitcast!(c::PROT_READ);
/// `PROT_WRITE`
const WRITE = bitcast!(c::PROT_WRITE);
/// `PROT_EXEC`
const EXEC = bitcast!(c::PROT_EXEC);
/// `PROT_GROWSUP`
#[cfg(linux_kernel)]
const GROWSUP = bitcast!(c::PROT_GROWSUP);
/// `PROT_GROWSDOWN`
#[cfg(linux_kernel)]
const GROWSDOWN = bitcast!(c::PROT_GROWSDOWN);
/// `PROT_SEM`
#[cfg(linux_kernel)]
const SEM = linux_raw_sys::general::PROT_SEM;
/// `PROT_BTI`
#[cfg(all(linux_kernel, target_arch = "aarch64"))]
const BTI = linux_raw_sys::general::PROT_BTI;
/// `PROT_MTE`
#[cfg(all(linux_kernel, target_arch = "aarch64"))]
const MTE = linux_raw_sys::general::PROT_MTE;
/// `PROT_SAO`
#[cfg(all(linux_kernel, any(target_arch = "powerpc", target_arch = "powerpc64")))]
const SAO = linux_raw_sys::general::PROT_SAO;
/// `PROT_ADI`
#[cfg(all(linux_kernel, any(target_arch = "sparc", target_arch = "sparc64")))]
const ADI = linux_raw_sys::general::PROT_ADI;
/// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
const _ = !0;
}
}
bitflags! {
/// `MAP_*` flags for use with [`mmap`].
///
/// For `MAP_ANONYMOUS` (aka `MAP_ANON`), see [`mmap_anonymous`].
///
/// [`mmap`]: crate::mm::mmap
/// [`mmap_anonymous`]: crates::mm::mmap_anonymous
#[repr(transparent)]
#[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
pub struct MapFlags: u32 {
/// `MAP_SHARED`
const SHARED = bitcast!(c::MAP_SHARED);
/// `MAP_SHARED_VALIDATE`
#[cfg(not(any(
bsd,
solarish,
target_os = "aix",
target_os = "android",
target_os = "emscripten",
target_os = "fuchsia",
target_os = "haiku",
target_os = "hurd",
target_os = "nto",
target_os = "redox",
)))]
const SHARED_VALIDATE = bitcast!(c::MAP_SHARED_VALIDATE);
/// `MAP_PRIVATE`
const PRIVATE = bitcast!(c::MAP_PRIVATE);
/// `MAP_DENYWRITE`
#[cfg(not(any(
bsd,
solarish,
target_os = "aix",
target_os = "haiku",
target_os = "hurd",
target_os = "nto",
target_os = "redox",
)))]
const DENYWRITE = bitcast!(c::MAP_DENYWRITE);
/// `MAP_FIXED`
const FIXED = bitcast!(c::MAP_FIXED);
/// `MAP_FIXED_NOREPLACE`
#[cfg(not(any(
bsd,
solarish,
target_os = "aix",
target_os = "android",
target_os = "emscripten",
target_os = "fuchsia",
target_os = "haiku",
target_os = "hurd",
target_os = "nto",
target_os = "redox",
)))]
const FIXED_NOREPLACE = bitcast!(c::MAP_FIXED_NOREPLACE);
/// `MAP_GROWSDOWN`
#[cfg(not(any(
bsd,
solarish,
target_os = "aix",
target_os = "haiku",
target_os = "hurd",
target_os = "nto",
target_os = "redox",
)))]
const GROWSDOWN = bitcast!(c::MAP_GROWSDOWN);
/// `MAP_HUGETLB`
#[cfg(not(any(
bsd,
solarish,
target_os = "aix",
target_os = "haiku",
target_os = "hurd",
target_os = "nto",
target_os = "redox",
)))]
const HUGETLB = bitcast!(c::MAP_HUGETLB);
/// `MAP_HUGE_2MB`
#[cfg(not(any(
bsd,
solarish,
target_os = "aix",
target_os = "android",
target_os = "emscripten",
target_os = "fuchsia",
target_os = "haiku",
target_os = "hurd",
target_os = "nto",
target_os = "redox",
)))]
const HUGE_2MB = bitcast!(c::MAP_HUGE_2MB);
/// `MAP_HUGE_1GB`
#[cfg(not(any(
bsd,
solarish,
target_os = "aix",
target_os = "android",
target_os = "emscripten",
target_os = "fuchsia",
target_os = "haiku",
target_os = "hurd",
target_os = "nto",
target_os = "redox",
)))]
const HUGE_1GB = bitcast!(c::MAP_HUGE_1GB);
/// `MAP_LOCKED`
#[cfg(not(any(
bsd,
solarish,
target_os = "aix",
target_os = "haiku",
target_os = "hurd",
target_os = "nto",
target_os = "redox",
)))]
const LOCKED = bitcast!(c::MAP_LOCKED);
/// `MAP_NOCORE`
#[cfg(freebsdlike)]
const NOCORE = bitcast!(c::MAP_NOCORE);
/// `MAP_NORESERVE`
#[cfg(not(any(
freebsdlike,
target_os = "aix",
target_os = "hurd",
target_os = "nto",
target_os = "redox",
)))]
const NORESERVE = bitcast!(c::MAP_NORESERVE);
/// `MAP_NOSYNC`
#[cfg(freebsdlike)]
const NOSYNC = bitcast!(c::MAP_NOSYNC);
/// `MAP_POPULATE`
#[cfg(not(any(
bsd,
solarish,
target_os = "aix",
target_os = "haiku",
target_os = "hurd",
target_os = "nto",
target_os = "redox",
)))]
const POPULATE = bitcast!(c::MAP_POPULATE);
/// `MAP_STACK`
#[cfg(not(any(
apple,
solarish,
target_os = "aix",
target_os = "haiku",
target_os = "hurd",
target_os = "redox",
)))]
const STACK = bitcast!(c::MAP_STACK);
/// `MAP_PREFAULT_READ`
#[cfg(target_os = "freebsd")]
const PREFAULT_READ = bitcast!(c::MAP_PREFAULT_READ);
/// `MAP_SYNC`
#[cfg(not(any(
bsd,
solarish,
target_os = "aix",
target_os = "android",
target_os = "emscripten",
target_os = "fuchsia",
target_os = "haiku",
target_os = "hurd",
target_os = "nto",
target_os = "redox",
all(
linux_kernel,
any(target_arch = "mips", target_arch = "mips32r6", target_arch = "mips64", target_arch = "mips64r6"),
)
)))]
const SYNC = bitcast!(c::MAP_SYNC);
/// `MAP_UNINITIALIZED`
#[cfg(any())]
const UNINITIALIZED = bitcast!(c::MAP_UNINITIALIZED);
/// `MAP_DROPPABLE`
#[cfg(linux_kernel)]
const DROPPABLE = bitcast!(c::MAP_DROPPABLE);
/// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
const _ = !0;
}
}
#[cfg(any(target_os = "emscripten", target_os = "linux"))]
bitflags! {
/// `MREMAP_*` flags for use with [`mremap`].
///
/// For `MREMAP_FIXED`, see [`mremap_fixed`].
///
/// [`mremap`]: crate::mm::mremap
/// [`mremap_fixed`]: crate::mm::mremap_fixed
#[repr(transparent)]
#[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
pub struct MremapFlags: u32 {
/// `MREMAP_MAYMOVE`
const MAYMOVE = bitcast!(c::MREMAP_MAYMOVE);
/// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
const _ = !0;
}
}
bitflags! {
/// `MS_*` flags for use with [`msync`].
///
/// [`msync`]: crate::mm::msync
#[repr(transparent)]
#[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
pub struct MsyncFlags: u32 {
/// `MS_SYNC`—Requests an update and waits for it to complete.
const SYNC = bitcast!(c::MS_SYNC);
/// `MS_ASYNC`—Specifies that an update be scheduled, but the call
/// returns immediately.
const ASYNC = bitcast!(c::MS_ASYNC);
/// `MS_INVALIDATE`—Asks to invalidate other mappings of the same
/// file (so that they can be updated with the fresh values just
/// written).
const INVALIDATE = bitcast!(c::MS_INVALIDATE);
/// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
const _ = !0;
}
}
#[cfg(linux_kernel)]
bitflags! {
/// `MLOCK_*` flags for use with [`mlock_with`].
///
/// [`mlock_with`]: crate::mm::mlock_with
#[repr(transparent)]
#[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
pub struct MlockFlags: u32 {
/// `MLOCK_ONFAULT`
const ONFAULT = bitcast!(c::MLOCK_ONFAULT);
/// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
const _ = !0;
}
}
/// `POSIX_MADV_*` constants for use with [`madvise`].
///
/// [`madvise`]: crate::mm::madvise
#[cfg(not(target_os = "redox"))]
#[derive(Debug, Copy, Clone, Eq, PartialEq)]
#[repr(u32)]
#[non_exhaustive]
pub enum Advice {
/// `POSIX_MADV_NORMAL`
#[cfg(not(any(target_os = "android", target_os = "haiku")))]
Normal = bitcast!(c::POSIX_MADV_NORMAL),
/// `POSIX_MADV_NORMAL`
#[cfg(any(target_os = "android", target_os = "haiku"))]
Normal = bitcast!(c::MADV_NORMAL),
/// `POSIX_MADV_SEQUENTIAL`
#[cfg(not(any(target_os = "android", target_os = "haiku")))]
Sequential = bitcast!(c::POSIX_MADV_SEQUENTIAL),
/// `POSIX_MADV_SEQUENTIAL`
#[cfg(any(target_os = "android", target_os = "haiku"))]
Sequential = bitcast!(c::MADV_SEQUENTIAL),
/// `POSIX_MADV_RANDOM`
#[cfg(not(any(target_os = "android", target_os = "haiku")))]
Random = bitcast!(c::POSIX_MADV_RANDOM),
/// `POSIX_MADV_RANDOM`
#[cfg(any(target_os = "android", target_os = "haiku"))]
Random = bitcast!(c::MADV_RANDOM),
/// `POSIX_MADV_WILLNEED`
#[cfg(not(any(target_os = "android", target_os = "haiku")))]
WillNeed = bitcast!(c::POSIX_MADV_WILLNEED),
/// `POSIX_MADV_WILLNEED`
#[cfg(any(target_os = "android", target_os = "haiku"))]
WillNeed = bitcast!(c::MADV_WILLNEED),
/// `POSIX_MADV_DONTNEED`
#[cfg(not(any(
target_os = "android",
target_os = "emscripten",
target_os = "haiku",
target_os = "hurd",
)))]
DontNeed = bitcast!(c::POSIX_MADV_DONTNEED),
/// `POSIX_MADV_DONTNEED`
#[cfg(any(target_os = "android", target_os = "haiku"))]
DontNeed = bitcast!(i32::MAX - 1),
/// `MADV_DONTNEED`
// `MADV_DONTNEED` has the same value as `POSIX_MADV_DONTNEED`. We don't
// have a separate `posix_madvise` from `madvise`, so we expose a special
// value which we special-case.
#[cfg(target_os = "linux")]
LinuxDontNeed = bitcast!(i32::MAX),
/// `MADV_DONTNEED`
#[cfg(target_os = "android")]
LinuxDontNeed = bitcast!(c::MADV_DONTNEED),
/// `MADV_FREE`
#[cfg(linux_kernel)]
LinuxFree = bitcast!(c::MADV_FREE),
/// `MADV_REMOVE`
#[cfg(linux_kernel)]
LinuxRemove = bitcast!(c::MADV_REMOVE),
/// `MADV_DONTFORK`
#[cfg(linux_kernel)]
LinuxDontFork = bitcast!(c::MADV_DONTFORK),
/// `MADV_DOFORK`
#[cfg(linux_kernel)]
LinuxDoFork = bitcast!(c::MADV_DOFORK),
/// `MADV_HWPOISON`
#[cfg(linux_kernel)]
LinuxHwPoison = bitcast!(c::MADV_HWPOISON),
/// `MADV_SOFT_OFFLINE`
#[cfg(all(
linux_kernel,
not(any(
target_arch = "mips",
target_arch = "mips32r6",
target_arch = "mips64",
target_arch = "mips64r6"
))
))]
LinuxSoftOffline = bitcast!(c::MADV_SOFT_OFFLINE),
/// `MADV_MERGEABLE`
#[cfg(linux_kernel)]
LinuxMergeable = bitcast!(c::MADV_MERGEABLE),
/// `MADV_UNMERGEABLE`
#[cfg(linux_kernel)]
LinuxUnmergeable = bitcast!(c::MADV_UNMERGEABLE),
/// `MADV_HUGEPAGE`
#[cfg(linux_kernel)]
LinuxHugepage = bitcast!(c::MADV_HUGEPAGE),
/// `MADV_NOHUGEPAGE`
#[cfg(linux_kernel)]
LinuxNoHugepage = bitcast!(c::MADV_NOHUGEPAGE),
/// `MADV_DONTDUMP` (since Linux 3.4)
#[cfg(linux_kernel)]
LinuxDontDump = bitcast!(c::MADV_DONTDUMP),
/// `MADV_DODUMP` (since Linux 3.4)
#[cfg(linux_kernel)]
LinuxDoDump = bitcast!(c::MADV_DODUMP),
/// `MADV_WIPEONFORK` (since Linux 4.14)
#[cfg(linux_kernel)]
LinuxWipeOnFork = bitcast!(c::MADV_WIPEONFORK),
/// `MADV_KEEPONFORK` (since Linux 4.14)
#[cfg(linux_kernel)]
LinuxKeepOnFork = bitcast!(c::MADV_KEEPONFORK),
/// `MADV_COLD` (since Linux 5.4)
#[cfg(linux_kernel)]
LinuxCold = bitcast!(c::MADV_COLD),
/// `MADV_PAGEOUT` (since Linux 5.4)
#[cfg(linux_kernel)]
LinuxPageOut = bitcast!(c::MADV_PAGEOUT),
/// `MADV_POPULATE_READ` (since Linux 5.14)
#[cfg(linux_kernel)]
LinuxPopulateRead = bitcast!(c::MADV_POPULATE_READ),
/// `MADV_POPULATE_WRITE` (since Linux 5.14)
#[cfg(linux_kernel)]
LinuxPopulateWrite = bitcast!(c::MADV_POPULATE_WRITE),
/// `MADV_DONTNEED_LOCKED` (since Linux 5.18)
#[cfg(linux_kernel)]
LinuxDontneedLocked = bitcast!(c::MADV_DONTNEED_LOCKED),
}
#[cfg(target_os = "emscripten")]
#[allow(non_upper_case_globals)]
impl Advice {
/// `POSIX_MADV_DONTNEED`
pub const DontNeed: Self = Self::Normal;
}
#[cfg(linux_kernel)]
bitflags! {
/// `O_*` flags for use with [`userfaultfd`].
///
/// [`userfaultfd`]: crate::mm::userfaultfd
#[repr(transparent)]
#[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
pub struct UserfaultfdFlags: u32 {
/// `O_CLOEXEC`
const CLOEXEC = bitcast!(c::O_CLOEXEC);
/// `O_NONBLOCK`
const NONBLOCK = bitcast!(c::O_NONBLOCK);
/// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
const _ = !0;
}
}
#[cfg(any(linux_kernel, freebsdlike, netbsdlike))]
bitflags! {
/// `MCL_*` flags for use with [`mlockall`].
///
/// [`mlockall`]: crate::mm::mlockall
#[repr(transparent)]
#[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
pub struct MlockAllFlags: u32 {
/// Used together with `MCL_CURRENT`, `MCL_FUTURE`, or both. Mark all
/// current (with `MCL_CURRENT`) or future (with `MCL_FUTURE`) mappings
/// to lock pages when they are faulted in. When used with
/// `MCL_CURRENT`, all present pages are locked, but `mlockall` will
/// not fault in non-present pages. When used with `MCL_FUTURE`, all
/// future mappings will be marked to lock pages when they are faulted
/// in, but they will not be populated by the lock when the mapping is
/// created. `MCL_ONFAULT` must be used with either `MCL_CURRENT` or
/// `MCL_FUTURE` or both.
#[cfg(linux_kernel)]
const ONFAULT = bitcast!(libc::MCL_ONFAULT);
/// Lock all pages which will become mapped into the address space of
/// the process in the future. These could be, for instance, new pages
/// required by a growing heap and stack as well as new memory-mapped
/// files or shared memory regions.
const FUTURE = bitcast!(libc::MCL_FUTURE);
/// Lock all pages which are currently mapped into the address space of
/// the process.
const CURRENT = bitcast!(libc::MCL_CURRENT);
/// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>
const _ = !0;
}
}