Type Alias SimulationKernelFn 

pub type SimulationKernelFn = unsafe extern "C" fn(cursor_index: usize, series_ptrs: *const *const f64, state_ptr: *mut u8) -> i32;

Function pointer type for simulation kernel functions (single series).

This is the “fused step” ABI that enables >10M ticks/sec by:

• Bypassing JITContext setup overhead
• Using direct pointer arithmetic for data access
• Avoiding all allocations in the hot loop

Arguments

• cursor_index - Current position in the series (0-based)
• series_ptrs - Pointer to array of column pointers (*const *const f64)
• state_ptr - Pointer to TypedObject state (*mut u8)

Returns

• 0 = continue execution
• 1 = signal generated (written to state)
• negative = error

Safety

The caller must ensure:

• cursor_index is within bounds
• series_ptrs points to valid column pointer array
• state_ptr points to valid TypedObject with correct schema