class ActiveSupport::Notifications::Event

def allocations
  @allocation_count_finish - @allocation_count_start
end

def children # :nodoc:
  ActiveSupport.deprecator.warn <<~EOM
    ActiveSupport::Notifications::Event#children is deprecated and will
    be removed in Rails 7.2.
  EOM
  []
end

def cpu_time
  @cpu_time_finish - @cpu_time_start
end

def duration
  self.end - time
end

def finish!
  @cpu_time_finish = now_cpu
  @end = now
  @allocation_count_finish = now_allocations
end

def idle_time
  diff = duration - cpu_time
  diff > 0.0 ? diff : 0.0
end

def initialize(name, start, ending, transaction_id, payload)
  @name           = name
  @payload        = payload.dup
  @time           = start ? start.to_f * 1_000.0 : start
  @transaction_id = transaction_id
  @end            = ending ? ending.to_f * 1_000.0 : ending
  @cpu_time_start = 0.0
  @cpu_time_finish = 0.0
  @allocation_count_start = 0
  @allocation_count_finish = 0
end

def now
  Process.clock_gettime(Process::CLOCK_MONOTONIC, :float_millisecond)
end

def now_allocations
  GC.stat(:total_allocated_objects)
end

def now_allocations
  0
end

def now_cpu
  Process.clock_gettime(Process::CLOCK_THREAD_CPUTIME_ID, :float_millisecond)
end

def now_cpu # rubocop:disable Lint/DuplicateMethods
  0.0
end

def parent_of?(event) # :nodoc:
  ActiveSupport.deprecator.warn <<~EOM
    ActiveSupport::Notifications::Event#parent_of? is deprecated and will
    be removed in Rails 7.2.
  EOM
  start = (time - event.time) * 1000
  start <= 0 && (start + duration >= event.duration)
end

def record
  start!
  begin
    yield payload if block_given?
  rescue Exception => e
    payload[:exception] = [e.class.name, e.message]
    payload[:exception_object] = e
    raise e
  ensure
    finish!
  end
end

def start!
  @time = now
  @cpu_time_start = now_cpu
  @allocation_count_start = now_allocations
end