Struct TimelineSemaphore 

pub struct TimelineSemaphore {
    pub value: u64,
    /* private fields */
}

A mock GPU timeline semaphore for synchronising multi-pass GPU work.

On real GPU APIs (Vulkan, D3D12), timeline semaphores allow the CPU to wait for a specific GPU progress point. This mock records signal and wait operations for testing.

Fields

value: u64

Current value of the semaphore counter.

Implementations

impl TimelineSemaphore

pub fn new() -> Self

Create a new semaphore starting at value 0.

pub fn signal(&mut self, new_value: u64)

Signal the semaphore to new_value. Value must be monotonically increasing.

pub fn wait(&mut self, wait_value: u64) -> bool

Record a wait-for request. In a mock, this checks wait_value <= current.

Returns true if the semaphore has already reached wait_value.

pub fn current_value(&self) -> u64

Return the current semaphore value.

pub fn signal_count(&self) -> usize

Number of times the semaphore has been signalled.

Trait Implementations

impl Default for TimelineSemaphore

fn default() -> Self

Returns the “default value” for a type.