Macro gpu_profile 

macro_rules! gpu_profile {
    ($profiler:expr, $name:expr) => { ... };
    ($profiler:expr, $name:expr, $color:expr) => { ... };
}

Macro for scoped GPU profiling.

Example

use ringkernel_core::gpu_profile;

fn compute_kernel() {
    gpu_profile!(profiler, "compute_kernel", {
        // GPU work here
    });
}