Module: FiberAudit::Runtime::SchedulerSnapshotCapture

Defined in:
lib/fiber_audit/runtime/scheduler_snapshot.rb

Overview

Captures immutable scheduler snapshot at the current point in time. This is called at operation start to provide immutable context.

Class Method Summary collapse

Class Method Details

.capture ⇒ Object 



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# File 'lib/fiber_audit/runtime/scheduler_snapshot.rb', line 64

def capture
  scheduler = Fiber.scheduler
  scheduler_present = !scheduler.nil?

  current_fiber = Fiber.current
  fiber_blocking = current_fiber.respond_to?(:blocking?) ? current_fiber.blocking? : nil

  # Query scheduler capabilities if present
  io_select_supported = nil
  process_wait_supported = nil
  address_resolve_supported = nil

  if scheduler_present
    io_select_supported = scheduler.respond_to?(:io_select)
    process_wait_supported = scheduler.respond_to?(:process_wait)
    address_resolve_supported = scheduler.respond_to?(:address_resolve)
  end

  SchedulerSnapshot.new(
    scheduler_present: scheduler_present,
    fiber_blocking: fiber_blocking,
    scheduler_io_select_supported: io_select_supported,
    scheduler_process_wait_supported: process_wait_supported,
    scheduler_address_resolve_supported: address_resolve_supported
  )
rescue StandardError
  # Fail open without inventing scheduler or Fiber state.
  SchedulerSnapshot.new(scheduler_present: nil, fiber_blocking: nil)
end