Enum FutexFlags

#[repr(usize)]
pub enum FutexFlags {
    Wait = 0,
    Wake = 1,
    Fd = 2,
    Requeue = 3,
    CmpRequeue = 4,
    WakeOp = 5,
    LockPi = 6,
    UnlockPi = 7,
    TrylockPi = 8,
    WaitBitset = 9,
}

Futex 操作类型枚举

MUSL: https://github.com/bminor/musl/blob/c47ad25ea3b484e10326f933e927c0bc8cded3da/src/internal/futex.h#L4

Variants

Wait = 0

等待操作，线程阻塞直到被唤醒

Wake = 1

唤醒等待的线程

Fd = 2

使用文件描述符的 Futex 操作（较少用）

Requeue = 3

将等待队列中的线程重新排队到另一个 Futex

CmpRequeue = 4

带比较操作的重新排队，只有在值匹配时才执行排队

WakeOp = 5

执行复杂的唤醒和重新排队组合操作

LockPi = 6

获取 Priority Inheritance 锁

UnlockPi = 7

释放 Priority Inheritance 锁

TrylockPi = 8

尝试获取 Priority Inheritance 锁（非阻塞）

WaitBitset = 9

等待指定的位集合（bitset），类似于 Wait，但支持位掩码

Trait Implementations

impl Debug for FutexFlags

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

Formats the value using the given formatter.

impl TryFrom<usize> for FutexFlags

type Error = TryFromPrimitiveError<FutexFlags>

The type returned in the event of a conversion error.

fn try_from(number: usize) -> Result<Self, TryFromPrimitiveError<Self>>

Performs the conversion.

impl TryFromPrimitive for FutexFlags

const NAME: &'static str = "FutexFlags"

type Primitive = usize

type Error = TryFromPrimitiveError<FutexFlags>

fn try_from_primitive( number: Self::Primitive, ) -> Result<Self, TryFromPrimitiveError<Self>>