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Diffstat (limited to 'vendor/rustix/src/process/membarrier.rs')
-rw-r--r-- | vendor/rustix/src/process/membarrier.rs | 92 |
1 files changed, 0 insertions, 92 deletions
diff --git a/vendor/rustix/src/process/membarrier.rs b/vendor/rustix/src/process/membarrier.rs deleted file mode 100644 index 26be07d..0000000 --- a/vendor/rustix/src/process/membarrier.rs +++ /dev/null @@ -1,92 +0,0 @@ -//! The Linux `membarrier` syscall. - -use crate::process::Cpuid; -use crate::{backend, io}; - -pub use backend::process::types::MembarrierCommand; - -#[cfg(linux_kernel)] -bitflags::bitflags! { - /// A result from [`membarrier_query`]. - /// - /// These flags correspond to values of [`MembarrierCommand`] which are - /// supported in the OS. - #[repr(transparent)] - #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)] - pub struct MembarrierQuery: u32 { - /// `MEMBARRIER_CMD_GLOBAL` (also known as `MEMBARRIER_CMD_SHARED`) - #[doc(alias = "SHARED")] - #[doc(alias = "MEMBARRIER_CMD_SHARED")] - const GLOBAL = MembarrierCommand::Global as _; - /// `MEMBARRIER_CMD_GLOBAL_EXPEDITED` - const GLOBAL_EXPEDITED = MembarrierCommand::GlobalExpedited as _; - /// `MEMBARRIER_CMD_REGISTER_GLOBAL_EXPEDITED` - const REGISTER_GLOBAL_EXPEDITED = MembarrierCommand::RegisterGlobalExpedited as _; - /// `MEMBARRIER_CMD_PRIVATE_EXPEDITED` - const PRIVATE_EXPEDITED = MembarrierCommand::PrivateExpedited as _; - /// `MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED` - const REGISTER_PRIVATE_EXPEDITED = MembarrierCommand::RegisterPrivateExpedited as _; - /// `MEMBARRIER_CMD_PRIVATE_EXPEDITED_SYNC_CORE` - const PRIVATE_EXPEDITED_SYNC_CORE = MembarrierCommand::PrivateExpeditedSyncCore as _; - /// `MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED_SYNC_CORE` - const REGISTER_PRIVATE_EXPEDITED_SYNC_CORE = MembarrierCommand::RegisterPrivateExpeditedSyncCore as _; - /// `MEMBARRIER_CMD_PRIVATE_EXPEDITED_RSEQ` (since Linux 5.10) - const PRIVATE_EXPEDITED_RSEQ = MembarrierCommand::PrivateExpeditedRseq as _; - /// `MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED_RSEQ` (since Linux 5.10) - const REGISTER_PRIVATE_EXPEDITED_RSEQ = MembarrierCommand::RegisterPrivateExpeditedRseq as _; - - /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags> - const _ = !0; - } -} - -#[cfg(linux_kernel)] -impl MembarrierQuery { - /// Test whether this query result contains the given command. - #[inline] - pub fn contains_command(self, cmd: MembarrierCommand) -> bool { - // `MembarrierCommand` is an enum that only contains values also valid - // in `MembarrierQuery`. - self.contains(Self::from_bits_retain(cmd as _)) - } -} - -/// `membarrier(MEMBARRIER_CMD_QUERY, 0, 0)`—Query the supported `membarrier` -/// commands. -/// -/// This function doesn't return a `Result` because it always succeeds; if the -/// underlying OS doesn't support the `membarrier` syscall, it returns an empty -/// `MembarrierQuery` value. -/// -/// # References -/// - [Linux] -/// -/// [Linux]: https://man7.org/linux/man-pages/man2/membarrier.2.html -#[inline] -#[doc(alias = "MEMBARRIER_CMD_QUERY")] -pub fn membarrier_query() -> MembarrierQuery { - backend::process::syscalls::membarrier_query() -} - -/// `membarrier(cmd, 0, 0)`—Perform a memory barrier. -/// -/// # References -/// - [Linux] -/// -/// [Linux]: https://man7.org/linux/man-pages/man2/membarrier.2.html -#[inline] -pub fn membarrier(cmd: MembarrierCommand) -> io::Result<()> { - backend::process::syscalls::membarrier(cmd) -} - -/// `membarrier(cmd, MEMBARRIER_CMD_FLAG_CPU, cpu)`—Perform a memory barrier -/// with a specific CPU. -/// -/// # References -/// - [Linux] -/// -/// [Linux]: https://man7.org/linux/man-pages/man2/membarrier.2.html -#[inline] -pub fn membarrier_cpu(cmd: MembarrierCommand, cpu: Cpuid) -> io::Result<()> { - backend::process::syscalls::membarrier_cpu(cmd, cpu) -} |