From 1b6a04ca5504955c571d1c97504fb45ea0befee4 Mon Sep 17 00:00:00 2001 From: Valentin Popov Date: Mon, 8 Jan 2024 01:21:28 +0400 Subject: Initial vendor packages Signed-off-by: Valentin Popov --- vendor/rustix/src/backend/libc/mm/mod.rs | 2 + vendor/rustix/src/backend/libc/mm/syscalls.rs | 244 +++++++++++++ vendor/rustix/src/backend/libc/mm/types.rs | 477 ++++++++++++++++++++++++++ 3 files changed, 723 insertions(+) create mode 100644 vendor/rustix/src/backend/libc/mm/mod.rs create mode 100644 vendor/rustix/src/backend/libc/mm/syscalls.rs create mode 100644 vendor/rustix/src/backend/libc/mm/types.rs (limited to 'vendor/rustix/src/backend/libc/mm') diff --git a/vendor/rustix/src/backend/libc/mm/mod.rs b/vendor/rustix/src/backend/libc/mm/mod.rs new file mode 100644 index 0000000..1e0181a --- /dev/null +++ b/vendor/rustix/src/backend/libc/mm/mod.rs @@ -0,0 +1,2 @@ +pub(crate) mod syscalls; +pub(crate) mod types; diff --git a/vendor/rustix/src/backend/libc/mm/syscalls.rs b/vendor/rustix/src/backend/libc/mm/syscalls.rs new file mode 100644 index 0000000..33bc9ca --- /dev/null +++ b/vendor/rustix/src/backend/libc/mm/syscalls.rs @@ -0,0 +1,244 @@ +//! libc syscalls supporting `rustix::mm`. + +#[cfg(not(target_os = "redox"))] +use super::types::Advice; +#[cfg(any(linux_kernel, freebsdlike, netbsdlike))] +use super::types::MlockAllFlags; +#[cfg(any(target_os = "emscripten", target_os = "linux"))] +use super::types::MremapFlags; +use super::types::{MapFlags, MprotectFlags, MsyncFlags, ProtFlags}; +#[cfg(linux_kernel)] +use super::types::{MlockFlags, UserfaultfdFlags}; +use crate::backend::c; +#[cfg(linux_kernel)] +use crate::backend::conv::ret_owned_fd; +use crate::backend::conv::{borrowed_fd, no_fd, ret}; +use crate::fd::BorrowedFd; +#[cfg(linux_kernel)] +use crate::fd::OwnedFd; +use crate::io; + +#[cfg(not(target_os = "redox"))] +pub(crate) fn madvise(addr: *mut c::c_void, len: usize, advice: Advice) -> io::Result<()> { + // On Linux platforms, `MADV_DONTNEED` has the same value as + // `POSIX_MADV_DONTNEED` but different behavior. We remap it to a different + // value, and check for it here. + #[cfg(target_os = "linux")] + if let Advice::LinuxDontNeed = advice { + return unsafe { ret(c::madvise(addr, len, c::MADV_DONTNEED)) }; + } + + #[cfg(not(target_os = "android"))] + { + let err = unsafe { c::posix_madvise(addr, len, advice as c::c_int) }; + + // `posix_madvise` returns its error status rather than using `errno`. + if err == 0 { + Ok(()) + } else { + Err(io::Errno(err)) + } + } + + #[cfg(target_os = "android")] + { + if let Advice::DontNeed = advice { + // Do nothing. Linux's `MADV_DONTNEED` isn't the same as + // `POSIX_MADV_DONTNEED`, so just discard `MADV_DONTNEED`. + Ok(()) + } else { + unsafe { ret(c::madvise(addr, len, advice as c::c_int)) } + } + } +} + +pub(crate) unsafe fn msync(addr: *mut c::c_void, len: usize, flags: MsyncFlags) -> io::Result<()> { + let err = c::msync(addr, len, bitflags_bits!(flags)); + + // `msync` returns its error status rather than using `errno`. + if err == 0 { + Ok(()) + } else { + Err(io::Errno(err)) + } +} + +/// # Safety +/// +/// `mmap` is primarily unsafe due to the `addr` parameter, as anything working +/// with memory pointed to by raw pointers is unsafe. +pub(crate) unsafe fn mmap( + ptr: *mut c::c_void, + len: usize, + prot: ProtFlags, + flags: MapFlags, + fd: BorrowedFd<'_>, + offset: u64, +) -> io::Result<*mut c::c_void> { + let res = c::mmap( + ptr, + len, + bitflags_bits!(prot), + bitflags_bits!(flags), + borrowed_fd(fd), + offset as i64, + ); + if res == c::MAP_FAILED { + Err(io::Errno::last_os_error()) + } else { + Ok(res) + } +} + +/// # Safety +/// +/// `mmap` is primarily unsafe due to the `addr` parameter, as anything working +/// with memory pointed to by raw pointers is unsafe. +pub(crate) unsafe fn mmap_anonymous( + ptr: *mut c::c_void, + len: usize, + prot: ProtFlags, + flags: MapFlags, +) -> io::Result<*mut c::c_void> { + let res = c::mmap( + ptr, + len, + bitflags_bits!(prot), + bitflags_bits!(flags | MapFlags::from_bits_retain(bitcast!(c::MAP_ANONYMOUS))), + no_fd(), + 0, + ); + if res == c::MAP_FAILED { + Err(io::Errno::last_os_error()) + } else { + Ok(res) + } +} + +pub(crate) unsafe fn mprotect( + ptr: *mut c::c_void, + len: usize, + flags: MprotectFlags, +) -> io::Result<()> { + ret(c::mprotect(ptr, len, bitflags_bits!(flags))) +} + +pub(crate) unsafe fn munmap(ptr: *mut c::c_void, len: usize) -> io::Result<()> { + ret(c::munmap(ptr, len)) +} + +/// # Safety +/// +/// `mremap` is primarily unsafe due to the `old_address` parameter, as +/// anything working with memory pointed to by raw pointers is unsafe. +#[cfg(any(target_os = "emscripten", target_os = "linux"))] +pub(crate) unsafe fn mremap( + old_address: *mut c::c_void, + old_size: usize, + new_size: usize, + flags: MremapFlags, +) -> io::Result<*mut c::c_void> { + let res = c::mremap(old_address, old_size, new_size, bitflags_bits!(flags)); + if res == c::MAP_FAILED { + Err(io::Errno::last_os_error()) + } else { + Ok(res) + } +} + +/// # Safety +/// +/// `mremap_fixed` is primarily unsafe due to the `old_address` and +/// `new_address` parameters, as anything working with memory pointed to by raw +/// pointers is unsafe. +#[cfg(any(target_os = "emscripten", target_os = "linux"))] +pub(crate) unsafe fn mremap_fixed( + old_address: *mut c::c_void, + old_size: usize, + new_size: usize, + flags: MremapFlags, + new_address: *mut c::c_void, +) -> io::Result<*mut c::c_void> { + let res = c::mremap( + old_address, + old_size, + new_size, + bitflags_bits!(flags | MremapFlags::from_bits_retain(bitcast!(c::MAP_FIXED))), + new_address, + ); + if res == c::MAP_FAILED { + Err(io::Errno::last_os_error()) + } else { + Ok(res) + } +} + +/// # Safety +/// +/// `mlock` operates on raw pointers and may round out to the nearest page +/// boundaries. +#[inline] +pub(crate) unsafe fn mlock(addr: *mut c::c_void, length: usize) -> io::Result<()> { + ret(c::mlock(addr, length)) +} + +/// # Safety +/// +/// `mlock_with` operates on raw pointers and may round out to the nearest page +/// boundaries. +#[cfg(linux_kernel)] +#[inline] +pub(crate) unsafe fn mlock_with( + addr: *mut c::c_void, + length: usize, + flags: MlockFlags, +) -> io::Result<()> { + weak_or_syscall! { + fn mlock2( + addr: *const c::c_void, + len: c::size_t, + flags: c::c_int + ) via SYS_mlock2 -> c::c_int + } + + ret(mlock2(addr, length, bitflags_bits!(flags))) +} + +/// # Safety +/// +/// `munlock` operates on raw pointers and may round out to the nearest page +/// boundaries. +#[inline] +pub(crate) unsafe fn munlock(addr: *mut c::c_void, length: usize) -> io::Result<()> { + ret(c::munlock(addr, length)) +} + +#[cfg(linux_kernel)] +pub(crate) unsafe fn userfaultfd(flags: UserfaultfdFlags) -> io::Result { + syscall! { + fn userfaultfd( + flags: c::c_int + ) via SYS_userfaultfd -> c::c_int + } + ret_owned_fd(userfaultfd(bitflags_bits!(flags))) +} + +/// Locks all pages mapped into the address space of the calling process. +/// +/// This includes the pages of the code, data, and stack segment, as well as +/// shared libraries, user space kernel data, shared memory, and memory-mapped +/// files. All mapped pages are guaranteed to be resident in RAM when the call +/// returns successfully; the pages are guaranteed to stay in RAM until later +/// unlocked. +#[inline] +#[cfg(any(linux_kernel, freebsdlike, netbsdlike))] +pub(crate) fn mlockall(flags: MlockAllFlags) -> io::Result<()> { + unsafe { ret(c::mlockall(bitflags_bits!(flags))) } +} + +/// Unlocks all pages mapped into the address space of the calling process. +#[inline] +#[cfg(any(linux_kernel, freebsdlike, netbsdlike))] +pub(crate) fn munlockall() -> io::Result<()> { + unsafe { ret(c::munlockall()) } +} diff --git a/vendor/rustix/src/backend/libc/mm/types.rs b/vendor/rustix/src/backend/libc/mm/types.rs new file mode 100644 index 0000000..a4aa3e2 --- /dev/null +++ b/vendor/rustix/src/backend/libc/mm/types.rs @@ -0,0 +1,477 @@ +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); + + /// + 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; + + /// + 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 = "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 = "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 = "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 = "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 = "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 = "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 = "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 = "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 = "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 = "nto", + target_os = "redox", + )))] + const POPULATE = bitcast!(c::MAP_POPULATE); + /// `MAP_STACK` + #[cfg(not(any( + apple, + solarish, + target_os = "aix", + target_os = "dragonfly", + target_os = "haiku", + target_os = "netbsd", + 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 = "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); + + /// + 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); + + /// + 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); + + /// + 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); + + /// + 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")))] + 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); + + /// + 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); + + /// + const _ = !0; + } +} -- cgit v1.2.3