Struct syscall::io_uring::v1::SqEntry32

#[repr(C, align(32))]pub struct SqEntry32 {
    pub opcode: u8,
    pub flags: u8,
    pub priority: u16,
    pub syscall_flags: u32,
    pub fd: u32,
    pub len: u32,
    pub user_data: u32,
    pub addr: u32,
    pub offset: u64,
}

A 32-bit Submission Queue Entry, representing a syscall to submit. Takes up 32 bytes of space. Implements Ord by comparing priority, so that they can be stored in BinaryHeap. This entry type is not restricted to only 32-bit platforms, and can be used as a smaller alternative entry type, to fit more entries within the same memory region.

Fields

opcode: u8

An opcode with varying definitions; by default it is one of StandardOpcode. Works the same way as with SqEntry64::opcode. This field belongs to the "implicit fields".

flags: u8

Flags specifying how the submission is going to be executed, and etc.

This field belongs to the "implicit fields".

priority: u16

The priority of the syscall; higher priorities may cause the syscall to be reordererd with lower priority syscalls.

This field belongs to the "implicit fields".

syscall_flags: u32

Specific to the opcode, but usually bitflags.

fd: u32

Specific to the opcode, but usually a file descriptor to operate on.

len: u32

Specific to the opcode, but usually the length of a buffer, or number of items.

user_data: u32

A custom value that is simply passed on to the completion entry, allowing completions to be distinguished between each other, and mapped to their corresponding submissions.

This field belongs to the "implicit fields".

addr: u32

Specific to the syscall, but usually an address to a buffer.

offset: u64

Specific to the syscall, and can be used for many different purposes, sometimes also as an address in order to access the 64-bit address space for opcodes that do not use it for anything else.

Trait Implementations

impl Clone for SqEntry32

fn clone(&self) -> SqEntry32

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for SqEntry32

impl Debug for SqEntry32

fn fmt(&self, f: &mut Formatter) -> Result

Formats the value using the given formatter.

impl Default for SqEntry32

fn default() -> SqEntry32

Returns the "default value" for a type.

impl Eq for SqEntry32

impl GenericSubmissionEntry for SqEntry32

fn opcode(&self) -> u8

fn sqe_flags(&self) -> u8

fn priority(&self) -> u16

fn syscall_flags(&self) -> u32

fn len_raw(&self) -> Either<u32, u64>

fn user_data_raw(&self) -> Either<u32, u64>

fn fd_raw(&self) -> Either<u32, u64>

fn addr_raw(&self) -> Either<u32, u64>

fn offset(&self) -> u64

impl Hash for SqEntry32

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given [Hasher].

fn hash_slice<H>(data: &[Self], state: &mut H) where
    H: Hasher, 

Feeds a slice of this type into the given [Hasher].

impl Ord for SqEntry32

fn cmp(&self, other: &Self) -> Ordering

This method returns an [Ordering] between self and other.

#[must_use]fn max(self, other: Self) -> Self

Compares and returns the maximum of two values.

#[must_use]fn min(self, other: Self) -> Self

Compares and returns the minimum of two values.

#[must_use]fn clamp(self, min: Self, max: Self) -> Self

🔬 This is a nightly-only experimental API. (clamp)

Restrict a value to a certain interval.

impl PartialEq<SqEntry32> for SqEntry32

fn eq(&self, other: &SqEntry32) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &SqEntry32) -> bool

This method tests for !=.

impl PartialOrd<SqEntry32> for SqEntry32

fn partial_cmp(&self, other: &Self) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

#[must_use]fn lt(&self, other: &Rhs) -> bool

This method tests less than (for self and other) and is used by the < operator.

#[must_use]fn le(&self, other: &Rhs) -> bool

This method tests less than or equal to (for self and other) and is used by the <= operator.

#[must_use]fn gt(&self, other: &Rhs) -> bool

This method tests greater than (for self and other) and is used by the > operator.

#[must_use]fn ge(&self, other: &Rhs) -> bool

This method tests greater than or equal to (for self and other) and is used by the >= operator.

impl StructuralEq for SqEntry32

impl StructuralPartialEq for SqEntry32