Struct RwLockState 

#[repr(C)]
pub struct RwLockState {
    pub reader_count: u32,
    pub writer_intent: u32,
    pub writer_active: u32,
    pub _padding: u32,
}

Shared-Exclusive lock state stored in lock file header

Format (16 bytes):

┌────────────┬────────────────┬──────────────────┬─────────┐
│ reader_cnt │ writer_intent  │ writer_active    │ padding │
│ (4 bytes)  │ (4 bytes)      │ (4 bytes)        │ (4 B)   │
└────────────┴────────────────┴──────────────────┴─────────┘

Fields

reader_count: u32

Number of active readers

writer_intent: u32

Writer waiting to acquire (prevents reader starvation)

writer_active: u32

Writer currently active

_padding: u32

Reserved for future use

Trait Implementations

impl Clone for RwLockState

fn clone(&self) -> RwLockState

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for RwLockState

impl Debug for RwLockState

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

Formats the value using the given formatter.

impl Default for RwLockState

fn default() -> RwLockState

Returns the “default value” for a type.