Method reserve_gpu_pair

native/shared/src/profiler.rs:175–184

Reserve a pair of GPU timestamp slot indices for the given label. Callers combine the returned indices with `query_set()` to build a `RenderPassTimestampWrites` for the pass descriptor. Returns None when profiling or GPU queries are disabled, or when no slots remain.

(&mut self, label: &'static str)

    /// `RenderPassTimestampWrites` for the pass descriptor. Returns None
    /// when profiling or GPU queries are disabled, or when no slots remain.
    pub fn reserve_gpu_pair(&mut self, label: &'static str) -> Option<(u32, u32)> {
        if !self.enabled || !self.gpu_enabled { return None; }
        self.query_set.as_ref()?;
        if self.next_query + 2 > MAX_GPU_PAIRS * 2 { return None; }
        let begin = self.next_query;
        let end = self.next_query + 1;
        self.next_query += 2;
        self.pending_gpu.push((label, begin, end));
        Some((begin, end))
    }

    pub fn query_set(&self) -> Option<&wgpu::QuerySet> {
        self.query_set.as_ref()